Today is April 16th. It's the 107th day of the year. 259 days remain. It's week 16 of the year.
Unless
noted, the following data is based upon observations collected by the
National Weather Service, Chicago, at O'Hare International Airport
(ORD) between November 1978 and last year. ORD has been the official
site of record for Chicago since Thursday, January 17, 1980. Before
this, the official site of record was on the
south side of Chicago at Midway
International Airport (MDW), beginning on Wednesday,
July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was
at various locations in Chicago going back to
Monday, October 16, 1871. Observations taken from
October 15, 1870 to October 8, 1871 were lost in
the Great Chicago Fire.
According
to the National Climatic Data Center (NCDC), the normal high is 59
and the normal low is 39. I've calculated the 33-year averages at 59
and 39.
On
the warm side, in 2002 (O'Hare's warmest April 16th) the high was the record high of 87 with the
near-record warmest low of 68. The former record high of 86 occurred in
1976 and the current record warmest low of 69 also occurred in 1976, both
at Midway. In 2004 the high was 82 with a low of
58. In 1982 the high was 68 with a low of 58. The other warm highs were 74
in 2005, 73 in 1989 and 73 in 2008. 14
of the past 33 highs (43%) were in the 60s. On the warm side, five
highs (15%) were in the: 70s (3) and 80s (2). O'Hare's second warmest April 16th was in 1976 (high of 85, low of 68). The lows of 68 in 1976 and 2002 were O'Hare's warmest lows of the date and only lows in the 60s for the date. Some of O'Hare's other pre-1979 warm highs were 84 in 1964, 83 in 1977, 78 in 1963 and 77 in 1969. On the cold side, 14
highs (42%) were in the: 40s (10) and 50s (4). O'Hare recorded six consecutive 40s & 50s highs from 1996 through 2001. Our most recent 50s high
was 51 in 1997.
In looking back through the years to the first April at O'Hare in
1959, the following instances were notable: In 1978 the high was a cold
46 degrees. In 1977 the high was 83 with a low of 55, a warm day. In
1976 the high was 85 with a low of 68, a warm day and year of the
record warmest low of 69 at Midway. In 1970 the
high was 72 with a low of 52, a warm day. In 1969 the high was a warm
77 with a low of 49, a warm day. In 1967 the high was 74 with a low of 54, a warm day. In 1966
the high was 62 with a cold low of 27, a 35 degree spread. In 1964 the
high was 84 with a low of 51, a 33 degree spread and warm day. In 1963
the high was 78 with a low of 53, a warm day. In 1962 the high was 48
with a cold low of 24, a cold day. In 1961 the high was a cold 33
with a low of 28, a five degree spread and cold day. In 1960 the high
was 72 with a low of 51, a warm day. In 1959 the high was a warm 74 degrees.
More recently, we had a small
spread of four degrees in 1999 (46/42). There were large spreads of 37
degrees in 2005 (74/37), 31 degrees in 1989 (73/42) and 30 degrees in
2007 (62/32).
On the
cold side, in 1983 the high was 43 with a low of 26. In 2001 the high
was 42 with a low of 29. In 1980 the high was 49 with a low of 24.
The other cold highs were 43 in 1984, 43 in 1993, 45 in 1986 and 46 in
1999. The record low of 18 and record coldest high of 27 were set on
the same cold day way back in 1875, at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were
in the: 30s (17) and 40s (10). Three lows were in the cold 20s. O'Hare's coldest April 16th was in 1961 as the high was 33 (O'Hare's only 30s high of the date) with a low of 28, a small five degree spread. Keep in mind that it was snowing today in 1961. In 1962 the low was 24 degrees. The lows of 24 in 1962 and 1980 are O'Hare's coldest readings of the date. Three
lows were in the warm: 50s (2) and 60s (1).
There
were two instances of back-to-back years in which temperatures
were just about as opposite as they can be. In 1982
the high
was 68 with a low of 58, overall 14 degrees ABOVE normal. Then in
1983 the high was 43 with a low of 26, overall 14.5 degrees BELOW
normal. In the second instance, in 2001 the high was 42 with a low of 29, overall 13.5 degrees BELOW normal. Then in 2002 the high was 87 with a low of 68, overall 28.5 degrees ABOVE normal.
Today
is a major day in Chicago's snow history. 1961 was the year. O'Hare
had 4.7 inches, the second of two days of 5.9 inches of snow. Midway
had 5.4 inches, the second of three days of 6.8 inches of snow.
Rockford recorded 4.4 inches.
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 5:41 and
sunrise is
at 6:10.
Sunset is at
19:36
and
twilight
ends at 20:06.
There's
a total
of 13
hours, 26 minutes of
daylight
today
and 14
hours, 25
minutes between
twilights.
We gained three minutes of
daylight from
yesterday. Tomorrow
twilight
begins
at 5:39 and sunrise
is at 6:09.
The
moon is
waning crescent.
Illumination
was 23% at
midnight, will be 19% at noon
and 15% at
midnight
tonight.
Moonrise was at 3:44 this morning. Moonset was at 15:27 this afternoon. Moonrise is at 4:10 tomorrow morning. Moonlight
time is 11 hours, 43 minutes which is 33 minutes longer than yesterday.
Spring
began on March 12th and runs
for 84
days
through June 3rd. Warm Spring began on April 13th and
runs for 52
days through June 3rd. High
temperatures
in
this
period
are
usually in
the 50s, 60s and
70s.
Highs in
the 80s and 90s occur
infrequently. Earth Day is in six days. Arbor Day is in 11 days.
Monday, April 16, 2012
April 15: ORD
Today is April 15th. It's the 106th day of the year. 260 days remain. It's week 16 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 59 and the normal low is 39. I've calculated the 33-year averages at 60 and 40.
On the warm side, in 2002 (O'Hare's warmest April 15th) the high was the record high of 88 with a low of 62. The former record high of 84 occurred at Midway in 1976. In 2003 the high was the record-challenging high of 86 with a low of 64. Two years ago, in 2010, the high was 82 with a low of 61. In 2004 the high was 75 with a low of 46. The other warm highs were 73 in 1982 and 72 in 2000. The record warmest low of 67 occurred in 1976 at Midway. 21 of the past 33 highs (64%) were in the: 50s (12) and 60s (9). O'Hare recorded six consecutive highs in the 50s & 60s from 1987 through 1992. On the warm side, six highs (18%) were in the: 70s (3) and 80s (3). O'Hare's warmest low of 65 degrees occurred on its third warmest April 15th in 1976. The high that day was 82 degrees. O'Hare also had a high of 79 in 1977 and six other highs in the 70s prior to 1979 (see next section). On the cold side, six highs (18%) were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was a warm 79 with a low of 49, a 30 degree spread and warm day. In 1976 the high was 82 with a low of 65, a warm day and year of the record warmest low of 67 at Midway. In 1973 the high was a warm 75 with a low of 44, a 31 degree spread. In 1971 the high was a warm 71 with a low of 35, a 36 degree spread. In 1969 the high was 61 with a warm low of 55, a six degree spread. In 1967 the high was 73 with a low of 54, a warm day. In 1964 the high was 62 with a low of 30, a 32 degree spread. In 1963 the high was a warm 73 with a low of 32, a 41 degree spread. In 1962 the high was a cold 42 with a low of 28, a cold day. In 1960 the high was a warm 72 with a low of 49, a warm day. In 1959 the high was a warm 71 with a low of 41, a 30 degree spread.
More recently, we had small spreads of five degrees in 1984 (42/37) and six degrees in 1993 (47/41). There were large spreads of 35 degrees in 1997 (66/31), 32 degrees in 1982 (73/41), 32 degrees in 2000 (72/40) and 30 degrees in 2005 (63/33).
On the cold side, in 1983 (O'Hare's coldest April 15th) the high was 40 with a low of 29. Three years later, in 1986, the high was 40 with a low of 31. These highs of 40 were the coldest highs for the date at O'Hare. The other cold highs were 42 in 1984, 45 in 1980, 45 in 1996 (our most recent 40s high) and 47 in 1993. O'Hare's other 20s low was 29 in 2007. The record low of 25 was set in 1943 at Midway. The record coldest high of 34 occurred back in 1928 at the University of Chicago. 28 of the last 33 lows (85%) were in the: 30s (16) and 40s (12). Two lows were in the cold 20s. O'Hare's second coldest April 15th was in 1962 as the high was 42 with a low of 28 (O'Hare's coldest low of the date). Three lows (of the last 33) were in the warm 60s. O'Hare's only lows in the 50s were 55 in 1969 and 54 in 1967.
Today is a major day in Chicago's snow history. 1961 was the year. O'Hare had 1.2 inches, the first of two days of 5.9 inches of snow. Midway had 1.1 inches, the first of three days of 6.8 inches of snow. Rockford didn't record any snow today, but stay tuned tomorrow!
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:43 and sunrise is at 6:12. Sunset is at 19:35 and twilight ends at 20:05. There's a total of 13 hours, 23 minutes of daylight today and 14 hours, 22 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:41 and sunrise is at 6:10. The moon is waning crescent, having reached last quarter two days ago at 5:50. Illumination was 32% at midnight, will be 27% at noon and 23% at midnight tonight. Moonrise was at 3:15 this morning. Moonset was at 14:25 this afternoon. Moonrise is at 3:44 tomorrow morning. Moonlight time is 11 hours, 10 minutes which is 33 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring begins on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in seven days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 59 and the normal low is 39. I've calculated the 33-year averages at 60 and 40.
On the warm side, in 2002 (O'Hare's warmest April 15th) the high was the record high of 88 with a low of 62. The former record high of 84 occurred at Midway in 1976. In 2003 the high was the record-challenging high of 86 with a low of 64. Two years ago, in 2010, the high was 82 with a low of 61. In 2004 the high was 75 with a low of 46. The other warm highs were 73 in 1982 and 72 in 2000. The record warmest low of 67 occurred in 1976 at Midway. 21 of the past 33 highs (64%) were in the: 50s (12) and 60s (9). O'Hare recorded six consecutive highs in the 50s & 60s from 1987 through 1992. On the warm side, six highs (18%) were in the: 70s (3) and 80s (3). O'Hare's warmest low of 65 degrees occurred on its third warmest April 15th in 1976. The high that day was 82 degrees. O'Hare also had a high of 79 in 1977 and six other highs in the 70s prior to 1979 (see next section). On the cold side, six highs (18%) were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was a warm 79 with a low of 49, a 30 degree spread and warm day. In 1976 the high was 82 with a low of 65, a warm day and year of the record warmest low of 67 at Midway. In 1973 the high was a warm 75 with a low of 44, a 31 degree spread. In 1971 the high was a warm 71 with a low of 35, a 36 degree spread. In 1969 the high was 61 with a warm low of 55, a six degree spread. In 1967 the high was 73 with a low of 54, a warm day. In 1964 the high was 62 with a low of 30, a 32 degree spread. In 1963 the high was a warm 73 with a low of 32, a 41 degree spread. In 1962 the high was a cold 42 with a low of 28, a cold day. In 1960 the high was a warm 72 with a low of 49, a warm day. In 1959 the high was a warm 71 with a low of 41, a 30 degree spread.
More recently, we had small spreads of five degrees in 1984 (42/37) and six degrees in 1993 (47/41). There were large spreads of 35 degrees in 1997 (66/31), 32 degrees in 1982 (73/41), 32 degrees in 2000 (72/40) and 30 degrees in 2005 (63/33).
On the cold side, in 1983 (O'Hare's coldest April 15th) the high was 40 with a low of 29. Three years later, in 1986, the high was 40 with a low of 31. These highs of 40 were the coldest highs for the date at O'Hare. The other cold highs were 42 in 1984, 45 in 1980, 45 in 1996 (our most recent 40s high) and 47 in 1993. O'Hare's other 20s low was 29 in 2007. The record low of 25 was set in 1943 at Midway. The record coldest high of 34 occurred back in 1928 at the University of Chicago. 28 of the last 33 lows (85%) were in the: 30s (16) and 40s (12). Two lows were in the cold 20s. O'Hare's second coldest April 15th was in 1962 as the high was 42 with a low of 28 (O'Hare's coldest low of the date). Three lows (of the last 33) were in the warm 60s. O'Hare's only lows in the 50s were 55 in 1969 and 54 in 1967.
Today is a major day in Chicago's snow history. 1961 was the year. O'Hare had 1.2 inches, the first of two days of 5.9 inches of snow. Midway had 1.1 inches, the first of three days of 6.8 inches of snow. Rockford didn't record any snow today, but stay tuned tomorrow!
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:43 and sunrise is at 6:12. Sunset is at 19:35 and twilight ends at 20:05. There's a total of 13 hours, 23 minutes of daylight today and 14 hours, 22 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:41 and sunrise is at 6:10. The moon is waning crescent, having reached last quarter two days ago at 5:50. Illumination was 32% at midnight, will be 27% at noon and 23% at midnight tonight. Moonrise was at 3:15 this morning. Moonset was at 14:25 this afternoon. Moonrise is at 3:44 tomorrow morning. Moonlight time is 11 hours, 10 minutes which is 33 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring begins on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in seven days.
April 14: ORD
Today is April 14th. It's the 105th day of the year. 261 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 60 and 39.
On the warm side, in 2006 (O'Hare's warmest April 14th) the high was 81 with the record tying warmest low of 63. The record warmest low of 63 was originally set way back in 1883. Three years before, in 2003, the high was the record high of 85 with a low of 48, a 37 degree spread. The former record high of 83 occurred in 1941. Two years ago, in 2010, the high was 80 with a low of 46, a 34 degree spread. The other warm highs were 77 in 2002, 76 in 2000 and 71 in 1994. 22 of the past 33 highs (67%) were in the: 50s (14) and 60s (8). O'Hare's most recent 60s high was 63 in 2005. There were 11 consecutive highs in the 50s & 60s from 1981 through 1991. 8 of these 11 (73%) were in the 50s. On the warm side, six highs (18%) were in the: 70s (3) and 80s (3). Prior to 1979, O'Hare's warmest April 14th was in 1967 as the high was 74 with a low of 58. O'Hare also had a high of 80 in 1976. On the cold side, five highs (15%) were in the: 30s (1) and 40s (4).
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the high was a warm 80 with a low of 47, a 33 degree spread and warm day. In 1967 the high was 74 with a low of 58, a warm day. In 1966 the high was 59 with a low of 27, a 32 degree spread. In 1963 the high was 59 with a low of 28, a 31 degree spread. In 1962 the high was a cold 45 degrees. In 1960 the low was a warm 54 degrees.
More recently, we had additional large spreads of 39 degrees in 2004 (68/29), 36 degrees in 2000 (76/40), 36 degrees in 2002 (77/41) and 30 degrees in 2005 (63/33).
On the cold side, in 1980 (O'Hare's coldest April 14th) the high was 35 (O'Hare's coldest high of the date) with a low of 31, a four degree spread. In 1996 the high was 44 with a low of 33. The other cold highs were 44 three years ago, in 2009 and 46 in 1992. The record low of 23 was set way back in 1907 and tied in 1943 at Midway. The record coldest high of 32 was set way back in 1893, at a time when the official readings were taken adjacent to Lake Michigan. 30 of the last 33 lows (91%) were in the: 30s (16) and 40s (14). Two lows were in the cold 20s. O'Hare's coldest lows were 27 in 1966, 28 in 1963, 29 in 1997 and 29 in 2004. One low was in the warm 60s. O'Hare's most recent 50s low was 58 in 1967. The low was also 54 in 1960.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:44 and sunrise is at 6:13. Sunset is at 19:34 and twilight ends at 20:03. There's a total of 13 hours, 21 minutes of daylight today and 14 hours, 19 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:43 and sunrise is at 6:12. The moon is waning crescent, having reached last quarter yesterday at 5:50. Illumination was 42% at midnight, will be 37% at noon and 32% at midnight tonight. Moonrise was at 2:44 this morning. Moonset was at 13:21 this afternoon. Moonrise is at 3:15 tomorrow morning. Moonlight time is 10 hours, 37 minutes which is 29 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began yesterday, on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in eight days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 60 and 39.
On the warm side, in 2006 (O'Hare's warmest April 14th) the high was 81 with the record tying warmest low of 63. The record warmest low of 63 was originally set way back in 1883. Three years before, in 2003, the high was the record high of 85 with a low of 48, a 37 degree spread. The former record high of 83 occurred in 1941. Two years ago, in 2010, the high was 80 with a low of 46, a 34 degree spread. The other warm highs were 77 in 2002, 76 in 2000 and 71 in 1994. 22 of the past 33 highs (67%) were in the: 50s (14) and 60s (8). O'Hare's most recent 60s high was 63 in 2005. There were 11 consecutive highs in the 50s & 60s from 1981 through 1991. 8 of these 11 (73%) were in the 50s. On the warm side, six highs (18%) were in the: 70s (3) and 80s (3). Prior to 1979, O'Hare's warmest April 14th was in 1967 as the high was 74 with a low of 58. O'Hare also had a high of 80 in 1976. On the cold side, five highs (15%) were in the: 30s (1) and 40s (4).
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the high was a warm 80 with a low of 47, a 33 degree spread and warm day. In 1967 the high was 74 with a low of 58, a warm day. In 1966 the high was 59 with a low of 27, a 32 degree spread. In 1963 the high was 59 with a low of 28, a 31 degree spread. In 1962 the high was a cold 45 degrees. In 1960 the low was a warm 54 degrees.
More recently, we had additional large spreads of 39 degrees in 2004 (68/29), 36 degrees in 2000 (76/40), 36 degrees in 2002 (77/41) and 30 degrees in 2005 (63/33).
On the cold side, in 1980 (O'Hare's coldest April 14th) the high was 35 (O'Hare's coldest high of the date) with a low of 31, a four degree spread. In 1996 the high was 44 with a low of 33. The other cold highs were 44 three years ago, in 2009 and 46 in 1992. The record low of 23 was set way back in 1907 and tied in 1943 at Midway. The record coldest high of 32 was set way back in 1893, at a time when the official readings were taken adjacent to Lake Michigan. 30 of the last 33 lows (91%) were in the: 30s (16) and 40s (14). Two lows were in the cold 20s. O'Hare's coldest lows were 27 in 1966, 28 in 1963, 29 in 1997 and 29 in 2004. One low was in the warm 60s. O'Hare's most recent 50s low was 58 in 1967. The low was also 54 in 1960.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:44 and sunrise is at 6:13. Sunset is at 19:34 and twilight ends at 20:03. There's a total of 13 hours, 21 minutes of daylight today and 14 hours, 19 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:43 and sunrise is at 6:12. The moon is waning crescent, having reached last quarter yesterday at 5:50. Illumination was 42% at midnight, will be 37% at noon and 32% at midnight tonight. Moonrise was at 2:44 this morning. Moonset was at 13:21 this afternoon. Moonrise is at 3:15 tomorrow morning. Moonlight time is 10 hours, 37 minutes which is 29 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began yesterday, on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in eight days.
April 13: ORD
Today is April 13th. It's the 104th day of the year. 262 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 58 and 38.
On the warm side, in 2006 (O'Hare's warmest April 13th) the high was 80 (O'Hare's warmest high of the date) with a low of 52. Twenty-five years before that, in 1981, the high was 79 with a low of 50. Four years later, in 1985, the high was 71 with a low of 54. In 1998 the high was 68 with a low of 55. The other warm highs were 73 in 1988 (our most recent 70s high) and 70 in 1983. The record high of 82 and record warmest low of 62 were set on the same warm day in 1941 at the University of Chicago. The record high of 82 was first set way back in 1887 adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 40s (8), 50s (12) and 60s (8). On the warm side, five highs were in the: 70s (4) and 80s (1). Tied with 1981 as O'Hare's second warmest April 13ths was: 1960 (high of 76 and low of 53) and 1968 (high of 71 and warmest low of the date of 58). O'Hare's other pre-1979 warm highs were 77 in 1977 and 72 in 1967.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was a warm 77 with a low of 47, a 30 degree spread and warm day. In 1976 the high was 69 with a low of 32, a 37 degree spread. In 1974 the high was a warm 71 with a low of 48, a warm day. In 1973 the low was a cold 26 degrees. In 1972 the high was a warm 70 with a low of 39, a 31 degree spread. In 1968 the high was 71 with a low of 58, a warm day. In 1967 the high was a warm 72 degrees. In 1964 the low was a warm 51 degrees. In 1962 the high was a cold 43 with a low of 30, a cold day. In 1960 the high was 76 with a low of 53, a warm day.
More recently, we had large spreads of 38 degrees in 2003 (67/29) and 41 degrees in 1988 (73/32).
On the cold side, in 1980 (O'Hare's coldest April 13th) the high was 46 with a low of 24 (O'Hare's coldest low of the date). In 2008 the high was 42 (O'Hare's coldest high of the date) with a low of 32. O'Hare's only other 20s lows of the date were all 29 degrees, in: 1989, 2003 and 2004 (our most recent 20s low). The other cold highs were 43 in 1992, 46 in 2004 and 46 in 2009. The record low of 21 and record coldest high of 33 were set on the same cold day in 1950 at Midway. 18 of the last 33 lows (55%) were in the 30s. Four lows (12%) were in the cold 20s. O'Hare's second coldest April 13th was in 1962 as the high was 43 with a low of 30. 11 lows (33%) were in the warm: 40s (7) and 50s (4).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1980 the high was 46 with a low of 24, overall 13 degrees BELOW normal. Then in 1981 the high was 79 with a low of 50, overall 16.5 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:46 and sunrise is at 6:15. Sunset is at 19:33 and twilight ends at 20:02. There's a total of 13 hours, 18 minutes of daylight today and 14 hours, 16 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:44 and sunrise is at 6:13. The moon reaches last quarter today at 5:50. Illumination was 52% at midnight, will be 47% at noon and 42% at midnight tonight. Moonrise was at 2:07 this morning. Moonset was at 12:15 this afternoon. Moonrise is at 2:44 tomorrow morning. Moonlight time is 10 hours, 8 minutes which is 22 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring begins today, on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in nine days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 58 and 38.
On the warm side, in 2006 (O'Hare's warmest April 13th) the high was 80 (O'Hare's warmest high of the date) with a low of 52. Twenty-five years before that, in 1981, the high was 79 with a low of 50. Four years later, in 1985, the high was 71 with a low of 54. In 1998 the high was 68 with a low of 55. The other warm highs were 73 in 1988 (our most recent 70s high) and 70 in 1983. The record high of 82 and record warmest low of 62 were set on the same warm day in 1941 at the University of Chicago. The record high of 82 was first set way back in 1887 adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 40s (8), 50s (12) and 60s (8). On the warm side, five highs were in the: 70s (4) and 80s (1). Tied with 1981 as O'Hare's second warmest April 13ths was: 1960 (high of 76 and low of 53) and 1968 (high of 71 and warmest low of the date of 58). O'Hare's other pre-1979 warm highs were 77 in 1977 and 72 in 1967.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was a warm 77 with a low of 47, a 30 degree spread and warm day. In 1976 the high was 69 with a low of 32, a 37 degree spread. In 1974 the high was a warm 71 with a low of 48, a warm day. In 1973 the low was a cold 26 degrees. In 1972 the high was a warm 70 with a low of 39, a 31 degree spread. In 1968 the high was 71 with a low of 58, a warm day. In 1967 the high was a warm 72 degrees. In 1964 the low was a warm 51 degrees. In 1962 the high was a cold 43 with a low of 30, a cold day. In 1960 the high was 76 with a low of 53, a warm day.
More recently, we had large spreads of 38 degrees in 2003 (67/29) and 41 degrees in 1988 (73/32).
On the cold side, in 1980 (O'Hare's coldest April 13th) the high was 46 with a low of 24 (O'Hare's coldest low of the date). In 2008 the high was 42 (O'Hare's coldest high of the date) with a low of 32. O'Hare's only other 20s lows of the date were all 29 degrees, in: 1989, 2003 and 2004 (our most recent 20s low). The other cold highs were 43 in 1992, 46 in 2004 and 46 in 2009. The record low of 21 and record coldest high of 33 were set on the same cold day in 1950 at Midway. 18 of the last 33 lows (55%) were in the 30s. Four lows (12%) were in the cold 20s. O'Hare's second coldest April 13th was in 1962 as the high was 43 with a low of 30. 11 lows (33%) were in the warm: 40s (7) and 50s (4).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1980 the high was 46 with a low of 24, overall 13 degrees BELOW normal. Then in 1981 the high was 79 with a low of 50, overall 16.5 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:46 and sunrise is at 6:15. Sunset is at 19:33 and twilight ends at 20:02. There's a total of 13 hours, 18 minutes of daylight today and 14 hours, 16 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:44 and sunrise is at 6:13. The moon reaches last quarter today at 5:50. Illumination was 52% at midnight, will be 47% at noon and 42% at midnight tonight. Moonrise was at 2:07 this morning. Moonset was at 12:15 this afternoon. Moonrise is at 2:44 tomorrow morning. Moonlight time is 10 hours, 8 minutes which is 22 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring begins today, on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s usually occur infrequently. Earth Day is in nine days.
Thursday, April 12, 2012
April 12: ORD
Today is April 12th. It's the 103rd day of the year. 263 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 55 and 38.
On the warm side, in 2006 the high was 76 with a low of 58 (O'Hare's warmest low of the date). In 1998 the high was 73 with a low of 55. In 1979 the high was 77 with a low of 45, a 32 degree spread. In 1985 the high was 76 with a low of 43, a 33 degree spread. The other warm high was 70 two years ago, in 2010. The record high of 86 was originally set in 1971 and tied in 1977, both at Midway. The record warmest low of 60 occurred in 1896, at a time when the official readings were taken adjacent to Lake Michigan. 22 of the past 33 highs (67%) were in the: 40s (9) and 50s (13). O'Hare recorded ten consecutive 40s & 50s highs from 1986 through 1995. On the warm side, nine highs (27%) were in the: 60s (4) and 70s (5). Our most recent 60s high was 67 in 2002. O'Hare's warmest April 12th was in 1977 as the high was 83 with a low of 57. O'Hare's warmest temperature of the date was 85 in 1971. O'Hare's other pre-1979 warm highs were 81 in 1968, 73 in 1974 and 72 in 1960. On the cold side, two highs (6%) were in the 30s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 83 with a low of 57, a warm day and year of the record high of 86 at Midway. In 1976 the low was a cold 25 degrees. In 1974 the high was 73 with a low of 53, a warm day. In 1971 the high was a warm 85 with a low of 45, a 40 degree spread and warm day. 1971 is also the original year of the record high of 86 at Midway. In 1968 the high was 81 with a low of 54, a warm day. In 1964 the low was a warm 51 degrees. In 1963 the high was 61 with a cold low of 26, a 35 degree spread. In 1962 the high was a cold 45 degrees. In 1961 the high was a cold 44 with a low of 37, a seven degree spread. In 1960 the high was a warm 72 with a low of 42, a 30 degree spread.
More recently, we had an additional small spread of seven degrees in 1981 (50/43).
On the cold side, in 1997 (O'Hare's coldest April 12th) the high was 36 with a low of 30, a six degree spread. In 1990 the high was 45 with a low of 25 (O'Hare's co-coldest low of the date (the low was also 25 in 1976)). In 2007 the high was 38 with a low of 33. The 30s highs just mentioned were the only 30s highs in O'Hare's history for the date. Three years earlier, in 2004, the high was 42 with a low of 30. The other cold highs were 41 in 1992, 42 in 2008 and 44 in 1995. The record low of 21 was originally set back in 1939 at the University of Chicago and tied in 1957 at Midway. The record coldest high of 34 occurred in 1950 at Midway. 27 of the last 33 lows (82%) were in the: 30s (16) and 40s (11). Four lows were in the cold 20s. O'Hare's second coldest low of the date was 26 in 1963. Two lows since 1979 were in the warm 50s.
There were two instances of back-to-back years in which temperatures were just about as opposite as they can be. In 1997 the high was 36 with a low of 30, overall 15 degrees BELOW normal. Then in 1998 the high was 73 with a low of 55, overall 16 degrees ABOVE normal. In the second instance, in 2006 the high was 76 with a low of 58, overall 19 degrees ABOVE normal. Then in 2007 the high was 38 with a low of 33, overall 12.5 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:48 and sunrise is at 6:17. Sunset is at 19:32 and twilight ends at 20:01. There's a total of 13 hours, 15 minutes of daylight today and 14 hours, 13 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:46 and sunrise is at 6:15. The moon is waning gibbous. Illumination was 63% at midnight, will be 58% at noon and 52% at midnight tonight. Moonrise was at 1:23 this morning. Moonset was at 11:09 this morning. Moonrise is at 2:07 tomorrow morning. Moonlight time is 9 hours, 46 minutes which is 14 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th (today). High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in ten days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 58 and the normal low is 38. I've calculated the 33-year averages at 55 and 38.
On the warm side, in 2006 the high was 76 with a low of 58 (O'Hare's warmest low of the date). In 1998 the high was 73 with a low of 55. In 1979 the high was 77 with a low of 45, a 32 degree spread. In 1985 the high was 76 with a low of 43, a 33 degree spread. The other warm high was 70 two years ago, in 2010. The record high of 86 was originally set in 1971 and tied in 1977, both at Midway. The record warmest low of 60 occurred in 1896, at a time when the official readings were taken adjacent to Lake Michigan. 22 of the past 33 highs (67%) were in the: 40s (9) and 50s (13). O'Hare recorded ten consecutive 40s & 50s highs from 1986 through 1995. On the warm side, nine highs (27%) were in the: 60s (4) and 70s (5). Our most recent 60s high was 67 in 2002. O'Hare's warmest April 12th was in 1977 as the high was 83 with a low of 57. O'Hare's warmest temperature of the date was 85 in 1971. O'Hare's other pre-1979 warm highs were 81 in 1968, 73 in 1974 and 72 in 1960. On the cold side, two highs (6%) were in the 30s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 83 with a low of 57, a warm day and year of the record high of 86 at Midway. In 1976 the low was a cold 25 degrees. In 1974 the high was 73 with a low of 53, a warm day. In 1971 the high was a warm 85 with a low of 45, a 40 degree spread and warm day. 1971 is also the original year of the record high of 86 at Midway. In 1968 the high was 81 with a low of 54, a warm day. In 1964 the low was a warm 51 degrees. In 1963 the high was 61 with a cold low of 26, a 35 degree spread. In 1962 the high was a cold 45 degrees. In 1961 the high was a cold 44 with a low of 37, a seven degree spread. In 1960 the high was a warm 72 with a low of 42, a 30 degree spread.
More recently, we had an additional small spread of seven degrees in 1981 (50/43).
On the cold side, in 1997 (O'Hare's coldest April 12th) the high was 36 with a low of 30, a six degree spread. In 1990 the high was 45 with a low of 25 (O'Hare's co-coldest low of the date (the low was also 25 in 1976)). In 2007 the high was 38 with a low of 33. The 30s highs just mentioned were the only 30s highs in O'Hare's history for the date. Three years earlier, in 2004, the high was 42 with a low of 30. The other cold highs were 41 in 1992, 42 in 2008 and 44 in 1995. The record low of 21 was originally set back in 1939 at the University of Chicago and tied in 1957 at Midway. The record coldest high of 34 occurred in 1950 at Midway. 27 of the last 33 lows (82%) were in the: 30s (16) and 40s (11). Four lows were in the cold 20s. O'Hare's second coldest low of the date was 26 in 1963. Two lows since 1979 were in the warm 50s.
There were two instances of back-to-back years in which temperatures were just about as opposite as they can be. In 1997 the high was 36 with a low of 30, overall 15 degrees BELOW normal. Then in 1998 the high was 73 with a low of 55, overall 16 degrees ABOVE normal. In the second instance, in 2006 the high was 76 with a low of 58, overall 19 degrees ABOVE normal. Then in 2007 the high was 38 with a low of 33, overall 12.5 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:48 and sunrise is at 6:17. Sunset is at 19:32 and twilight ends at 20:01. There's a total of 13 hours, 15 minutes of daylight today and 14 hours, 13 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:46 and sunrise is at 6:15. The moon is waning gibbous. Illumination was 63% at midnight, will be 58% at noon and 52% at midnight tonight. Moonrise was at 1:23 this morning. Moonset was at 11:09 this morning. Moonrise is at 2:07 tomorrow morning. Moonlight time is 9 hours, 46 minutes which is 14 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th (today). High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in ten days.
Wednesday, April 11, 2012
April 11: ORD
Today is April 11th. It's the 102nd day of the year. 264 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 57 and the normal low is 37. I've calculated the 33-year averages at 57 and 38.
On the warm side, in 2005 the high was 76 with a low of 53. Four years before, in 2001, the high was 77 with a low of 51. Five years before, in 1996, the high was 82 with a low of 45, a 37 degree spread. In 2002 the high was 75 with a low of 50. Four years later, in 2006, the high was 75 with a low of 48. The other warm highs were 70 in 2003 and 69 in 1981. The record high of 90 was set back in 1930 at the University of Chicago. The record warmest low of 60 was set in 1977 at Midway. 25 of the past 33 highs (76%) were in the: 40s (11), 50s (6) and 60s (8). Our most recent 50s high was 51 in 1999. On the warm side, six highs (18%) were in the: 70s (5) and 80s (1). All of the post-1978 70s highs occurred in a six year span from 2001 to 2006. O'Hare's warmest April 11th was in 1977 as the high was 84 with a low of 59. The other pre-1979 warm highs were 80 in 1971, 76 in 1964, 75 in 1965 and 74 in 1968. On the cold side, two highs (6%) were in the 30s. The 30s highs happened fairly close in years, in 1997 and 2000.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 84 with a low of 59, a warm day and year of the record warmest low of 60 at Midway. In 1976 the high was a cold 41 degrees with a low of 30, a cold day. In 1975 the high was a cold 45 degrees. In 1974 the low was a warm 50 degrees. In 1973 the high was 45 with a low of 25, a cold day. In 1971 the high was a warm 80 with a low of 47, a 33 degree spread and warm day. In 1968 the high was a warm 74 with a low of 39, a 35 degree spread. In 1965 the high was 75 with a low of 49, a warm day. In 1964 the high was a warm 76 with a low of 41, a 35 degree spread and warm day. In 1959 the high was a cold 44 degrees.
More recently, the other large spreads (aside from 1996, see "warm side") were 38 degrees in 2003 (70/32), 35 degrees in 1986 (66/31) and 32 degrees in 1998 (66/34). There were no small spreads other than in 1997 (see the next section).
On the cold side, in 1997 (O'Hare's coldest April 11th) the high was 35 with a low of 32, a three degree spread. In 2000 the high was 39 with a low of 29. The other cold low was the record low of 25, set in 1989. Two other years share the record low of 25: originally way back in 1882 (near the lakefront) and then in 1973 at Midway. O'Hare also had cold lows of 25 in 1973 and 26 in 1959. The other cold highs were 40 in 1990, 43 in 2004, 43 in 2007, 44 in 1991, 45 in 1979, 45 in 1980 and 45 in 1983. The record coldest high of 33 was set way back in 1882, at a time when the official readings were taken adjacent to Lake Michigan. So since 1882 has both the record low and record coldest high, it's the coldest April 11th for Chicago. 25 of the last 33 lows (78%) were in the: 30s (16) and 40s (9). Four lows were in the cold 20s. Our most recent 20s low was 29 in 2000. Three lows were in the warm 50s.
There were two instances of back-to-back years in which temperatures were just about as opposite as they can be. In 1996 the high was 82 with a low of 45, overall 16.5 degrees ABOVE normal. Then in 1997 the high was 35 with a low of 32, overall 13.5 degrees BELOW normal. In the second instance, in 2000 the high was 39 with a low of 29, overall 13 degrees BELOW normal. Then in 2001 the high was 77 with a low of 51, overall 17 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:49 and sunrise is at 6:18. Sunset is at 19:31 and twilight ends at 20:00. There's a total of 13 hours, 13 minutes of daylight today and 14 hours, 11 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:48 and sunrise is at 6:17. The moon is waning gibbous. Illumination was 74% at midnight, will be 69% at noon and 63% at midnight tonight. Moonrise was at 0:31 this morning. Moonset was at 10:03 this morning. Moonrise is at 1:23 tomorrow morning. Moonlight time is 9 hours, 32 minutes which is 31 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th (tomorrow). High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 11 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 57 and the normal low is 37. I've calculated the 33-year averages at 57 and 38.
On the warm side, in 2005 the high was 76 with a low of 53. Four years before, in 2001, the high was 77 with a low of 51. Five years before, in 1996, the high was 82 with a low of 45, a 37 degree spread. In 2002 the high was 75 with a low of 50. Four years later, in 2006, the high was 75 with a low of 48. The other warm highs were 70 in 2003 and 69 in 1981. The record high of 90 was set back in 1930 at the University of Chicago. The record warmest low of 60 was set in 1977 at Midway. 25 of the past 33 highs (76%) were in the: 40s (11), 50s (6) and 60s (8). Our most recent 50s high was 51 in 1999. On the warm side, six highs (18%) were in the: 70s (5) and 80s (1). All of the post-1978 70s highs occurred in a six year span from 2001 to 2006. O'Hare's warmest April 11th was in 1977 as the high was 84 with a low of 59. The other pre-1979 warm highs were 80 in 1971, 76 in 1964, 75 in 1965 and 74 in 1968. On the cold side, two highs (6%) were in the 30s. The 30s highs happened fairly close in years, in 1997 and 2000.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 84 with a low of 59, a warm day and year of the record warmest low of 60 at Midway. In 1976 the high was a cold 41 degrees with a low of 30, a cold day. In 1975 the high was a cold 45 degrees. In 1974 the low was a warm 50 degrees. In 1973 the high was 45 with a low of 25, a cold day. In 1971 the high was a warm 80 with a low of 47, a 33 degree spread and warm day. In 1968 the high was a warm 74 with a low of 39, a 35 degree spread. In 1965 the high was 75 with a low of 49, a warm day. In 1964 the high was a warm 76 with a low of 41, a 35 degree spread and warm day. In 1959 the high was a cold 44 degrees.
More recently, the other large spreads (aside from 1996, see "warm side") were 38 degrees in 2003 (70/32), 35 degrees in 1986 (66/31) and 32 degrees in 1998 (66/34). There were no small spreads other than in 1997 (see the next section).
On the cold side, in 1997 (O'Hare's coldest April 11th) the high was 35 with a low of 32, a three degree spread. In 2000 the high was 39 with a low of 29. The other cold low was the record low of 25, set in 1989. Two other years share the record low of 25: originally way back in 1882 (near the lakefront) and then in 1973 at Midway. O'Hare also had cold lows of 25 in 1973 and 26 in 1959. The other cold highs were 40 in 1990, 43 in 2004, 43 in 2007, 44 in 1991, 45 in 1979, 45 in 1980 and 45 in 1983. The record coldest high of 33 was set way back in 1882, at a time when the official readings were taken adjacent to Lake Michigan. So since 1882 has both the record low and record coldest high, it's the coldest April 11th for Chicago. 25 of the last 33 lows (78%) were in the: 30s (16) and 40s (9). Four lows were in the cold 20s. Our most recent 20s low was 29 in 2000. Three lows were in the warm 50s.
There were two instances of back-to-back years in which temperatures were just about as opposite as they can be. In 1996 the high was 82 with a low of 45, overall 16.5 degrees ABOVE normal. Then in 1997 the high was 35 with a low of 32, overall 13.5 degrees BELOW normal. In the second instance, in 2000 the high was 39 with a low of 29, overall 13 degrees BELOW normal. Then in 2001 the high was 77 with a low of 51, overall 17 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:49 and sunrise is at 6:18. Sunset is at 19:31 and twilight ends at 20:00. There's a total of 13 hours, 13 minutes of daylight today and 14 hours, 11 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:48 and sunrise is at 6:17. The moon is waning gibbous. Illumination was 74% at midnight, will be 69% at noon and 63% at midnight tonight. Moonrise was at 0:31 this morning. Moonset was at 10:03 this morning. Moonrise is at 1:23 tomorrow morning. Moonlight time is 9 hours, 32 minutes which is 31 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th (tomorrow). High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 11 days.
Tuesday, April 10, 2012
April 10: ORD
Today is April 10th. It's the 101st day of the year. 265 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 57 and the normal low is 37. I've calculated the 33-year averages at 56 and 35.
On the warm side, last year, in 2011 (O'Hare's warmest April 10th) the high was 83 with the record warmest low of 56. The former record warmest low was 55 in 1945. In 2005 the high was 79 with a low of 44, a 35 degree spread. In 1981 the high was 69 with a low of 50. Six years later, in 1987, the high was 74 with a low of 45. The other warm highs were 74 two years ago (in 2010), 71 in 2006 and 69 in 1992. The record high of 90 was set back in 1930 at the University of Chicago. 23 of the past 33 highs (70%) were in the: 40s (11) and 50s (12). On the warm side, ten highs (30%) were in the: 60s (5) and 70s (4) and 80s (1). Our most recent 60s high was 64 in 2002. O'Hare's second warmest April 10th (in 1977) was also the year of its highest temperature of the date, that of 85 degrees. The low in 1977 was also a warm 50 degrees.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 85 with a low of 50, a 35 degree spread and warm day. In 1976 the high was a warm 72 with a low of 37, a 35 degree spread. In 1975 the high was a cold 44 degrees. In 1973 the high was a cold 35 with a low of 28, a seven degree spread and cold day. In 1971 the high was a warm 69 with a low of 32, a 37 degree spread. In 1966 the low was a cold 24 degrees. In 1961 the high was a cold 45 degrees. In 1960 the low was a cold 24 degrees. In 1959 the high was a cold 38 with a low of 28, a cold day.
More recently, we had a small spread of seven degrees in 2000 (40/33). The large spreads were more numerous: 37 degrees in 2006 (71/34), 36 degrees two years ago, in 2010 (74/38), 32 degrees in 1996 (62/30), 32 degrees in 2003 (58/26), 31 degrees in 1986 (60/29) and 30 degrees in 2002 (64/34).
On the cold side, in 1989 (O'Hare's coldest April 10th) the high was 40 with the record low of 18. In 1997 the high was 40 with a low of 21. In 1980 the high was 40 with a low of 29. In 1982 the high was 43 with a low of 28. In 1979 the high was 45 with a low of 26. The other cold highs were 40 in 2000, 41 in 1995 and 44 in 1983. The record coldest high of 32 occurred way back in 1892, at a time when the official readings were taken adjacent to Lake Michigan. O'Hare's coldest high of 35 occurred in 1973. The other cold 30s high was 38 in 1959. 17 of the last 33 lows (52%) were in the 30s. Nine lows (27%) were in the cold: 10s (a.k.a. teens) (1) and 20s (8). Seven lows (21%) were in the warm: 40s (5) and 50s (2). Our most recent 40s low was 44 in 2005.
There was an instance of back-to-back-to-back years in which temperatures were just about as opposite as they can be. In 1980 the high was 40 with a low of 29, overall 12.5 degrees BELOW normal. Then in 1981 the high was 69 with a low of 50, overall 12.5 degrees ABOVE normal. In 1982 the high was 43 with a low of 28, overall 11.5 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:51 and sunrise is at 6:20. Sunset is at 19:30 and twilight ends at 19:59. There's a total of 13 hours, 10 minutes of daylight today and 14 hours, 8 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:49 and sunrise is at 6:18. The moon is waning gibbous. Illumination was 83% at midnight, will be 79% at noon and 74% at midnight tonight. Moonset is at 9:01 this morning. Moonrise is at 0:31 tomorrow morning. Moonset is at 10:03 tomorrow morning. Moonlight time is 9 hours, 1 minute which is 24 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th. High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 12 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 57 and the normal low is 37. I've calculated the 33-year averages at 56 and 35.
On the warm side, last year, in 2011 (O'Hare's warmest April 10th) the high was 83 with the record warmest low of 56. The former record warmest low was 55 in 1945. In 2005 the high was 79 with a low of 44, a 35 degree spread. In 1981 the high was 69 with a low of 50. Six years later, in 1987, the high was 74 with a low of 45. The other warm highs were 74 two years ago (in 2010), 71 in 2006 and 69 in 1992. The record high of 90 was set back in 1930 at the University of Chicago. 23 of the past 33 highs (70%) were in the: 40s (11) and 50s (12). On the warm side, ten highs (30%) were in the: 60s (5) and 70s (4) and 80s (1). Our most recent 60s high was 64 in 2002. O'Hare's second warmest April 10th (in 1977) was also the year of its highest temperature of the date, that of 85 degrees. The low in 1977 was also a warm 50 degrees.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 85 with a low of 50, a 35 degree spread and warm day. In 1976 the high was a warm 72 with a low of 37, a 35 degree spread. In 1975 the high was a cold 44 degrees. In 1973 the high was a cold 35 with a low of 28, a seven degree spread and cold day. In 1971 the high was a warm 69 with a low of 32, a 37 degree spread. In 1966 the low was a cold 24 degrees. In 1961 the high was a cold 45 degrees. In 1960 the low was a cold 24 degrees. In 1959 the high was a cold 38 with a low of 28, a cold day.
More recently, we had a small spread of seven degrees in 2000 (40/33). The large spreads were more numerous: 37 degrees in 2006 (71/34), 36 degrees two years ago, in 2010 (74/38), 32 degrees in 1996 (62/30), 32 degrees in 2003 (58/26), 31 degrees in 1986 (60/29) and 30 degrees in 2002 (64/34).
On the cold side, in 1989 (O'Hare's coldest April 10th) the high was 40 with the record low of 18. In 1997 the high was 40 with a low of 21. In 1980 the high was 40 with a low of 29. In 1982 the high was 43 with a low of 28. In 1979 the high was 45 with a low of 26. The other cold highs were 40 in 2000, 41 in 1995 and 44 in 1983. The record coldest high of 32 occurred way back in 1892, at a time when the official readings were taken adjacent to Lake Michigan. O'Hare's coldest high of 35 occurred in 1973. The other cold 30s high was 38 in 1959. 17 of the last 33 lows (52%) were in the 30s. Nine lows (27%) were in the cold: 10s (a.k.a. teens) (1) and 20s (8). Seven lows (21%) were in the warm: 40s (5) and 50s (2). Our most recent 40s low was 44 in 2005.
There was an instance of back-to-back-to-back years in which temperatures were just about as opposite as they can be. In 1980 the high was 40 with a low of 29, overall 12.5 degrees BELOW normal. Then in 1981 the high was 69 with a low of 50, overall 12.5 degrees ABOVE normal. In 1982 the high was 43 with a low of 28, overall 11.5 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:51 and sunrise is at 6:20. Sunset is at 19:30 and twilight ends at 19:59. There's a total of 13 hours, 10 minutes of daylight today and 14 hours, 8 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:49 and sunrise is at 6:18. The moon is waning gibbous. Illumination was 83% at midnight, will be 79% at noon and 74% at midnight tonight. Moonset is at 9:01 this morning. Moonrise is at 0:31 tomorrow morning. Moonset is at 10:03 tomorrow morning. Moonlight time is 9 hours, 1 minute which is 24 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th. High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 12 days.
April 9: ORD
Today is April 9th. It's the 100th day of the year. 266 days remain. It's week 15 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 56 and the normal low is 37. I've calculated the 33-year averages at 52 and 34.
On the warm side, in 1994 the high was 67 with a low of 48. Last year, in 2011, the high was 66 with a low of 44. The other warm highs were 72 in 1987, 68 in 1988 and 68 in 2005. The record high of 80 was set way back in 1887. The record warmest low of 58 occurred back in 1922. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 25 of the past 33 highs (76%) were in the: 40s (10) and 50s (15). O'Hare recorded seven consecutive 40s & 50s highs from 1998 through 2004. On the warm side, six highs (18%) were in the: 60s (5) and 70s (1). O'Hare's warmest April 9th was in 1967 as the high was 75 with a low of 49. O'Hare's warmest low of the date came on another 70 degree April 9th, in 1969. In 1969 the high was 71 with a low of 52. On the cold side, two highs (6%) were in the 30s. Prior to 1989 (high of 37, see "cold side" below), O'Hare's coldest highs were 37 in 1960, 37 in 1961 and 39 in 1975.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 63 with a low of 29, a 34 degree spread. In 1976 the high was 60 with a low of 28, a 32 degree spread. In 1975 the high was a cold 39 with a low of 33, a six degree spread. In 1974 the low was a cold 25 degrees. In 1973 the high was a cold 41 degrees. In 1972 the high was 43 with a low of 24, a cold day. In 1969 the high was 71 with a low of 52, a warm day. In 1967 the high was 75 with a low of 49, a warm day. In 1964 the high was 56 with a cold low of 25, a 31 degree spread. In 1963 the high was a cold 44 degrees. In 1961 the high was a cold 37 with a low of 33, a four degree spread. In 1960 the high was 37 with a low of 25, a cold day. In 1959 the high was a cold 43 degrees.
More recently, we had small spreads of four degrees in 1998 (45/41) and seven degrees in 1980 (40/33). The large spreads were 45 degrees in 1987 (72/27), 33 degrees in 2005 (68/35) and 30 degrees in 1988 (68/38).
On the cold side, in 1989 (O'Hare's coldest April 9th) the high was 37 with the record low of 20. In 1997 the high was 38 with a low of 22. In 1985 the high was 42 with a low of 21. In 1979 the high was 40 with a low of 26. In 1982 the high was 40 with a low of 27. The other cold highs were 40 in 1980, 42 in 1995, 43 in 2003 and 43 in 2007. The record coldest high of 33 occurred way back in 1874, at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 20s (10) and 30s (17). Six lows were in the warm 40s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:53 and sunrise is at 6:22. Sunset is at 19:29 and twilight ends at 19:57. There's a total of 13 hours, 7 minutes of daylight today and 14 hours, 4 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:51 and sunrise is at 6:20. The moon is waning gibbous, having reached the full Pink (a.k.a. Sprouting Grass/Egg/Fish) moon three days ago at 14:19. Illumination was 91% at midnight, will be 88% at noon and 83% at midnight tonight. Moonset is at 8:05 this morning. Moonrise is at 23:28 tonight. Moonset is at 9:01 tomorrow morning. Moonlight time is 8 hours, 37 minutes which is 22 minutes shorter than yesterday. Moonlight time is at its least today.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th. High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 13 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 56 and the normal low is 37. I've calculated the 33-year averages at 52 and 34.
On the warm side, in 1994 the high was 67 with a low of 48. Last year, in 2011, the high was 66 with a low of 44. The other warm highs were 72 in 1987, 68 in 1988 and 68 in 2005. The record high of 80 was set way back in 1887. The record warmest low of 58 occurred back in 1922. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 25 of the past 33 highs (76%) were in the: 40s (10) and 50s (15). O'Hare recorded seven consecutive 40s & 50s highs from 1998 through 2004. On the warm side, six highs (18%) were in the: 60s (5) and 70s (1). O'Hare's warmest April 9th was in 1967 as the high was 75 with a low of 49. O'Hare's warmest low of the date came on another 70 degree April 9th, in 1969. In 1969 the high was 71 with a low of 52. On the cold side, two highs (6%) were in the 30s. Prior to 1989 (high of 37, see "cold side" below), O'Hare's coldest highs were 37 in 1960, 37 in 1961 and 39 in 1975.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 63 with a low of 29, a 34 degree spread. In 1976 the high was 60 with a low of 28, a 32 degree spread. In 1975 the high was a cold 39 with a low of 33, a six degree spread. In 1974 the low was a cold 25 degrees. In 1973 the high was a cold 41 degrees. In 1972 the high was 43 with a low of 24, a cold day. In 1969 the high was 71 with a low of 52, a warm day. In 1967 the high was 75 with a low of 49, a warm day. In 1964 the high was 56 with a cold low of 25, a 31 degree spread. In 1963 the high was a cold 44 degrees. In 1961 the high was a cold 37 with a low of 33, a four degree spread. In 1960 the high was 37 with a low of 25, a cold day. In 1959 the high was a cold 43 degrees.
More recently, we had small spreads of four degrees in 1998 (45/41) and seven degrees in 1980 (40/33). The large spreads were 45 degrees in 1987 (72/27), 33 degrees in 2005 (68/35) and 30 degrees in 1988 (68/38).
On the cold side, in 1989 (O'Hare's coldest April 9th) the high was 37 with the record low of 20. In 1997 the high was 38 with a low of 22. In 1985 the high was 42 with a low of 21. In 1979 the high was 40 with a low of 26. In 1982 the high was 40 with a low of 27. The other cold highs were 40 in 1980, 42 in 1995, 43 in 2003 and 43 in 2007. The record coldest high of 33 occurred way back in 1874, at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 20s (10) and 30s (17). Six lows were in the warm 40s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:53 and sunrise is at 6:22. Sunset is at 19:29 and twilight ends at 19:57. There's a total of 13 hours, 7 minutes of daylight today and 14 hours, 4 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:51 and sunrise is at 6:20. The moon is waning gibbous, having reached the full Pink (a.k.a. Sprouting Grass/Egg/Fish) moon three days ago at 14:19. Illumination was 91% at midnight, will be 88% at noon and 83% at midnight tonight. Moonset is at 8:05 this morning. Moonrise is at 23:28 tonight. Moonset is at 9:01 tomorrow morning. Moonlight time is 8 hours, 37 minutes which is 22 minutes shorter than yesterday. Moonlight time is at its least today.
Spring began on March 12th and runs for 84 days through June 3rd. Cool Spring began on March 12th and runs for 32 days through April 12th. High temperatures in this period are usually in the 30s, 40s and 50s. Highs in the 60s and 70s usually occur infrequently. Earth Day is in 13 days.
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