Today is April 21st. It's the 112th day of the year. 254 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 61
and the normal low is 41. I've calculated the 33-year averages at 60
and 40.
On
the warm side, in 1985 (O'Hare's warmest April 21st) the high was the record high of 88 with the
record warmest low of 63. Until 1985, O'Hare's warmest low was 61 in 1974. This was also the former record warmest low at Midway. In 2001 the high was 82 with a low of 55. In
1980 the high was 79 with a low of 46, a 33 degree spread. The other warm
highs were 77 in 2007 and 75 in 2008. 22
of the past 33 highs (67%) were in the: 50s (14) and 60s (8). O'Hare recorded 12 consecutive 50s and 60s highs from 1989 through 2000. On the
warm side, seven highs (21%) were in the: 70s (5) and 80s (2). On the
cold side, four highs (12%) 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 1975 the high was a cold 49 degrees. In 1974 the high was 70 with a warm low of 61, a warm day.
In 1973 the high was 68 with a warm low of 59, a warm day. In 1972 the
high was a cold 47 with a low of 41, a six degree spread. In 1968 the
low was a warm 53 degrees. In 1962 the high was
a warm 80 with a low of 44, a warm day and 36 degree spread. In 1960 the high was 73 with a
low of 55, a warm day. In 1959 the high was 47 with a low of
29, a cold day.
More recently, we had small spreads of three
degrees in 2002 (42/39), six degrees in 1998 (53/47) and seven degrees
three years ago in 2009 (44/37). The additional large spreads were: 34 degrees in
2007 (77/43), 33 degrees in 2008 (75/42) and 32 degrees in 1987
(72/40).
On
the cold side, in 1986 (O'Hare's coldest April 21st) the high was 45 with the record low of 27. Two
years later, in 1988, the high was 45 with a low of 29. The other cold lows were 29 in both 1981 and 1993 (our most recent 20s low). The other cold
highs were 42 in 2002 (O'Hare's coldest high of April 21st) and 44 three years ago in 2009. The record coldest
high of 35 was set back in 1936 at the University of Chicago. 27 of the last 33 lows (82%) were in
the: 30s (9) and 40s (18). Four lows were in the cold 20s. Prior to 1979, O'Hare's only sub-30 degree low was 29 in 1959. Two lows were in the
warm: 50s (1) and 60s (1).
There
was an instance of back-to-back years in which temperatures
were just about as opposite as they can be. In 1985 the high was 88 with a low of 63, overall 24.5 degrees ABOVE normal. Then in 1986 the high was 45 with
a low of 27, overall 15 degrees BELOW normal.
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 5:33 and
sunrise is
at 6:02.
Sunset is at
19:42
and
twilight
ends at 20:12.
There's
a total
of 13
hours, 40 minutes of
daylight
today
and 14
hours, 39
minutes between
twilights.
We gained three minutes of
daylight from
yesterday. Tomorrow
twilight
begins
at 5:31 and sunrise
is at 6:01.
The
moon becomes new today at 2:18.
Illumination
was 0% at
midnight, will be
0% at noon
and 1% at
midnight
tonight.
Moonrise was at 5:58 this morning. Moonset was at 20:25 tonight. Moonrise is at 6:31 tomorrow morning. Moonlight
time is 14 hours, 27 minutes which is 29 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 tomorrow. Arbor Day is in six days.
Showing posts with label April 21. Show all posts
Showing posts with label April 21. Show all posts
Sunday, April 22, 2012
Thursday, April 21, 2011
April 21: ORD
Today is April 21st. It's the 111th day of the year. 254 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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 32-year averages at 60 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 in 2007, 75 in 2008 and 72 in 1987. 21 of the last 32 highs (66%) were in the: 50s (13) and 60s (8). On the warmer side, seven highs (22%) were in the: 70s (5) and 80s (2). On the cold side, four highs (12%) 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 1976 the low was a warm 52 degrees. In 1974 the high was 70 with a warm low of 61, a warm day. In 1973 the high was 68 with a warm low of 59, a warm day. In 1972 the high was a cold 47 with a low of 41, a six degree spread. In 1968 the low was a warm 53 degrees. In 1967 the high was 72 with a low of 51, a warm day. In 1964 the high was a warm 72 degrees. In 1962 the high was a warm 80 with a low of 44, a warm day. In 1960 the high was 73 with a low of 55, a warm day. In 1959 the high was a cold 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39), six degrees in 1998 (53/47) and seven degrees two years ago in 2009 (44/37). The large spreads were: 34 degrees in 2007 (77/43), 33 degrees in 2008 (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Other cold highs were 42 in 2002 and 44 two years ago in 2009. The record coldest high of 35 was set back in 1936. 18 of the last 32 lows (56%) were in the 40s. In fact, 7 of the last 8 lows were in the 40s. 12 lows (38%) were in the cold: 20s (4) and 30s (8). Two lows (6%) were in the warmer: 50s (1) and 60s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:34 and sunrise is at 6:04. Sunset is at 19:41 and twilight ends at 20:11. There's a total of 13 hours, 37 minutes of daylight today and 14 hours, 37 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:32 and sunrise is at 6:02. The moon is waning gibbous. Illumination was 87% at midnight, will be 83% at noon and 78% at midnight tonight. Moonset is at 8:30 this morning. Moonrise is at 0:13 tomorrow morning. Moonset is at 9:32 tomorrow morning. Moonlight time is 8 hours, 30 minutes which is 12 minutes longer than yesterday.
The warm part of Spring (Warm Spring) began on April 13. Warm Spring runs for 52 days, through June 3. High temperatures in this period are usually in the 50s, 60s and 70s. Warmer 80s and 90s occur infrequently. Good Friday and Earth Day are tomorrow. -Bernie-
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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 32-year averages at 60 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 in 2007, 75 in 2008 and 72 in 1987. 21 of the last 32 highs (66%) were in the: 50s (13) and 60s (8). On the warmer side, seven highs (22%) were in the: 70s (5) and 80s (2). On the cold side, four highs (12%) 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 1976 the low was a warm 52 degrees. In 1974 the high was 70 with a warm low of 61, a warm day. In 1973 the high was 68 with a warm low of 59, a warm day. In 1972 the high was a cold 47 with a low of 41, a six degree spread. In 1968 the low was a warm 53 degrees. In 1967 the high was 72 with a low of 51, a warm day. In 1964 the high was a warm 72 degrees. In 1962 the high was a warm 80 with a low of 44, a warm day. In 1960 the high was 73 with a low of 55, a warm day. In 1959 the high was a cold 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39), six degrees in 1998 (53/47) and seven degrees two years ago in 2009 (44/37). The large spreads were: 34 degrees in 2007 (77/43), 33 degrees in 2008 (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Other cold highs were 42 in 2002 and 44 two years ago in 2009. The record coldest high of 35 was set back in 1936. 18 of the last 32 lows (56%) were in the 40s. In fact, 7 of the last 8 lows were in the 40s. 12 lows (38%) were in the cold: 20s (4) and 30s (8). Two lows (6%) were in the warmer: 50s (1) and 60s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:34 and sunrise is at 6:04. Sunset is at 19:41 and twilight ends at 20:11. There's a total of 13 hours, 37 minutes of daylight today and 14 hours, 37 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:32 and sunrise is at 6:02. The moon is waning gibbous. Illumination was 87% at midnight, will be 83% at noon and 78% at midnight tonight. Moonset is at 8:30 this morning. Moonrise is at 0:13 tomorrow morning. Moonset is at 9:32 tomorrow morning. Moonlight time is 8 hours, 30 minutes which is 12 minutes longer than yesterday.
The warm part of Spring (Warm Spring) began on April 13. Warm Spring runs for 52 days, through June 3. High temperatures in this period are usually in the 50s, 60s and 70s. Warmer 80s and 90s occur infrequently. Good Friday and Earth Day are tomorrow. -Bernie-
Wednesday, April 21, 2010
April 21: ORD
Today is April 21st. It's the 111th day of the year. 254 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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 31-year averages at 60 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 three years ago, 75 two years ago and 72 in 1987. 13 of the last 31 highs were 50s. On the warmer side, 14 highs were: 60s (7), 70s (5) and 80s (2). On the colder side, four highs were 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the low was a warm 52. In 1974 the high was 70 with a low of 61, a warm day. In 1973 the high was 68 with a warm low of 59, a warm day. In 1972 the high was a cold 47 with a low of 41, a six degree spread. In 1968 the low was a warm 53. In 1967 the high was 72 with a low of 51, a warm day. In 1964 the high was a warm 72. In 1962 the high was a warm 80 with a low of 44, a warm day. In 1960 the high was 73 with a low of 55, another warm day. In 1959 the high was a cold 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39), six degrees in 1998 (53/47) and seven degrees last year (44/37). The large spreads were: 34 degrees two years ago (77/43), 33 degrees last year (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Another cold high was 42 in 2002 and 44 last year. The record coldest high of 35 was set back in 1936. 17 of the last 31 lows were 40s. 12 lows were in the colder: 20s (4) and 30s (8). Two lows were in the warmer: 50s (1) and 60s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 5:34 and sunrise was at 6:03. Sunset is at 19:42 and twilight ends at 20:11. There's a total of 13 hours, 39 minutes of daylight today and 14 hours, 37 minutes between twilights. Tomorrow twilight begins at 5:32 and sunrise is at 6:02. The moon reached first quarter today at 13:20. Illumination was 44% at midnight, will be 50% at noon and 56% at midnight tonight. Moonset was at 2:01 this morning. Moonrise was at 11:55. Moonset is at 2:36 early tomorrow morning. Moonlight time is 14 hours, 6 minutes which is 30 minutes shorter than yesterday.
Earth Day is tomorrow and Arbor Day is in three days. - Bernie -
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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 31-year averages at 60 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 three years ago, 75 two years ago and 72 in 1987. 13 of the last 31 highs were 50s. On the warmer side, 14 highs were: 60s (7), 70s (5) and 80s (2). On the colder side, four highs were 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the low was a warm 52. In 1974 the high was 70 with a low of 61, a warm day. In 1973 the high was 68 with a warm low of 59, a warm day. In 1972 the high was a cold 47 with a low of 41, a six degree spread. In 1968 the low was a warm 53. In 1967 the high was 72 with a low of 51, a warm day. In 1964 the high was a warm 72. In 1962 the high was a warm 80 with a low of 44, a warm day. In 1960 the high was 73 with a low of 55, another warm day. In 1959 the high was a cold 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39), six degrees in 1998 (53/47) and seven degrees last year (44/37). The large spreads were: 34 degrees two years ago (77/43), 33 degrees last year (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Another cold high was 42 in 2002 and 44 last year. The record coldest high of 35 was set back in 1936. 17 of the last 31 lows were 40s. 12 lows were in the colder: 20s (4) and 30s (8). Two lows were in the warmer: 50s (1) and 60s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 5:34 and sunrise was at 6:03. Sunset is at 19:42 and twilight ends at 20:11. There's a total of 13 hours, 39 minutes of daylight today and 14 hours, 37 minutes between twilights. Tomorrow twilight begins at 5:32 and sunrise is at 6:02. The moon reached first quarter today at 13:20. Illumination was 44% at midnight, will be 50% at noon and 56% at midnight tonight. Moonset was at 2:01 this morning. Moonrise was at 11:55. Moonset is at 2:36 early tomorrow morning. Moonlight time is 14 hours, 6 minutes which is 30 minutes shorter than yesterday.
Earth Day is tomorrow and Arbor Day is in three days. - Bernie -
Tuesday, April 21, 2009
April 21: ORD
Today is April 21st. It's the 111th day of the year. 254 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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 30-year averages at 61 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 two years ago, 75 last year and 72 in 1987. 13 of the last 30 highs were 50s. On the warmer side, 14 highs were: 60s (7), 70s (5) and 80s (2). On the colder side, three highs were 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1974 the high was 70 with a low of 61, a warm day. In 1973 the high was 68 with a low of 59, a warm day. In 1972 the high was 47 with a low of 41, a six degree spread. In 1967 the high was 72 with a low of 51, another warm day. In 1962 the high was 80 with a low of 44, yet another warm day. In 1960 the high was 73 with a low of 55, yet another warm day. In 1959 the high was 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39) and six degrees in 1998 (53/47). The large spreads were: 34 degrees two years ago (77/43), 33 degrees last year (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Another cold high was 42 in 2002. The record coldest high of 35 was set back in 1936. 17 of the last 30 lows were 40s. 11 lows were in the colder: 20s (4) and 30s (7). Two lows were in the warmer: 50s (1) and 60s (1).
Today is not a major day in Chicago's snow history.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:33 and sunrise is at 6:03. Sunset is at 19:42 and twilight ends at 20:12. Tomorrow twilight begins at 5:32 and sunrise is at 6:01. There's a total of 13 hours, 39 minutes of daylight today and 14 hours, 39 minutes between twilights. The moon is waning crescent and will reach new in three days at 22:23. Illumination was 17% at midnight, will be 13% at noon and 10% at midnight tonight. Moon rise was at 4:05 and moon set is at 16:11. The moon will rise at 4:26 tomorrow. Moonlight time is 12 hours, 6 minutes which is 43 minutes longer than yesterday.
Holocaust Remembrance Day is today. Administrative Professionals Day and Earth Day are tomorrow. Arbor Day is in three days. -Bernie-
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.
According to the National Climatic Data Center (NCDC), the normal high is 60 and the normal low is 39. I've calculated the 30-year averages at 61 and 40.
On the warm side, in 1985 the high was the record high of 88 with the record warmest low of 63. In 2001 the high was 82 with a low of 55. In 1980 the high was 79 with a low of 46, a 33 degree spread. Other warm highs were 77 two years ago, 75 last year and 72 in 1987. 13 of the last 30 highs were 50s. On the warmer side, 14 highs were: 60s (7), 70s (5) and 80s (2). On the colder side, three highs were 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1974 the high was 70 with a low of 61, a warm day. In 1973 the high was 68 with a low of 59, a warm day. In 1972 the high was 47 with a low of 41, a six degree spread. In 1967 the high was 72 with a low of 51, another warm day. In 1962 the high was 80 with a low of 44, yet another warm day. In 1960 the high was 73 with a low of 55, yet another warm day. In 1959 the high was 47 with a low of 29, a cold day.
More recently, we had small spreads of three degrees in 2002 (42/39) and six degrees in 1998 (53/47). The large spreads were: 34 degrees two years ago (77/43), 33 degrees last year (75/42) and 32 degrees in 1987 (72/40).
On the cold side, in 1986 the high was 45 with the record low of 27. Two years later, in 1988, the high was 45 with a low of 29. Another cold high was 42 in 2002. The record coldest high of 35 was set back in 1936. 17 of the last 30 lows were 40s. 11 lows were in the colder: 20s (4) and 30s (7). Two lows were in the warmer: 50s (1) and 60s (1).
Today is not a major day in Chicago's snow history.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:33 and sunrise is at 6:03. Sunset is at 19:42 and twilight ends at 20:12. Tomorrow twilight begins at 5:32 and sunrise is at 6:01. There's a total of 13 hours, 39 minutes of daylight today and 14 hours, 39 minutes between twilights. The moon is waning crescent and will reach new in three days at 22:23. Illumination was 17% at midnight, will be 13% at noon and 10% at midnight tonight. Moon rise was at 4:05 and moon set is at 16:11. The moon will rise at 4:26 tomorrow. Moonlight time is 12 hours, 6 minutes which is 43 minutes longer than yesterday.
Holocaust Remembrance Day is today. Administrative Professionals Day and Earth Day are tomorrow. Arbor Day is in three days. -Bernie-
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