Today is March 20th. It's the 79th day of the year. 286 days remain. It's week 12 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 48 and the normal low is 30. I've calculated the 30-year averages at 47 and 30.
On the warm side, in 2003 the high was 65 with a low of 43. Other warm highs were 62 in 2004, 61 (1991, 1994) and 60 in 1995. Another warm low was 43 in 2000. The record high of 76 was set back in 1921 and the record warmest low of 53 was set back in 1918. Unusual for just three years of separation for these records. 11 of the last 30 highs were 40s. On the warmer side, 11 highs were: 50s (6) and 60s (5). On the colder side, eight highs were: 30s (7) and 20s (1).
In looking back through the years to the first March at O'Hare in 1959, the following instances were notable: In 1976 the high was 70 with a low of 47, a bonus 70s day. In 1975 the high was 60 with a low of 38, a bonus 60s day. In 1972 the high was 69 with a low of 38, a 31 degree spread and bonus 60s day. In 1970 the high was 41 with a low of 36, a five degree spread. In 1967 the high was 36 with a low of 33, a three degree spread. In 1966 the high was 56 with a low of 26, a 30 degree spread. In 1965 the high was 22 with a low of 0, a cold day.
More recently, we had small spreads of three degrees in 1998 (36/33), five degrees in 1983 (32/27) and seven degrees in 1993 (38/31). There was a large spread of 30 degrees in 2004 as the high was 62 with a low of 32.
On the cold side, in 1986 the high was 26 with a low of 8. Other cold highs were 32 in 1983, 36 half a decade later in 1988 and 36 a decade after that in 1998. The record low of 4 and record coldest high of 15 were set on the same day way back in 1885. 26 of the last 30 lows were: 20s (14) and 30s (12). One low was in the colder single digits. Three lows were in the warmer 40s. No lows have been in the 10s (a.k.a. teens) over the last 30 years.
Today is a major day in Chicago's snow history. At O'Hare in 1965, this was the first of seven days in which a total of 10.2 inches fell. Today just a tenth of an inch fell.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:28 and sunrise is at 6:56. Sunset is at 19:06 and twilight ends at 19:34. Tomorrow twilight begins at 6:27 and sunrise is at 6:55. There's a total of 12 hours, 10 minutes of daylight today and 13 hours, 6 minutes between twilights. The moon is waning crescent and reached last quarter two days ago at 12:47. Illumination was 36% at midnight, will be 32% at noon and 27% at midnight tonight. Moonrise was at 3:55. Moonset is at 13:05. Moonrise is at 4:27 tomorrow. Moonlight time is 9 hours, 10 minutes which is 22 minutes longer than yesterday. Spring begins today (the vernal equinox) at 6:44.
April Fool's Day is in 12 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 48 and the normal low is 30. I've calculated the 30-year averages at 47 and 30.
On the warm side, in 2003 the high was 65 with a low of 43. Other warm highs were 62 in 2004, 61 (1991, 1994) and 60 in 1995. Another warm low was 43 in 2000. The record high of 76 was set back in 1921 and the record warmest low of 53 was set back in 1918. Unusual for just three years of separation for these records. 11 of the last 30 highs were 40s. On the warmer side, 11 highs were: 50s (6) and 60s (5). On the colder side, eight highs were: 30s (7) and 20s (1).
In looking back through the years to the first March at O'Hare in 1959, the following instances were notable: In 1976 the high was 70 with a low of 47, a bonus 70s day. In 1975 the high was 60 with a low of 38, a bonus 60s day. In 1972 the high was 69 with a low of 38, a 31 degree spread and bonus 60s day. In 1970 the high was 41 with a low of 36, a five degree spread. In 1967 the high was 36 with a low of 33, a three degree spread. In 1966 the high was 56 with a low of 26, a 30 degree spread. In 1965 the high was 22 with a low of 0, a cold day.
More recently, we had small spreads of three degrees in 1998 (36/33), five degrees in 1983 (32/27) and seven degrees in 1993 (38/31). There was a large spread of 30 degrees in 2004 as the high was 62 with a low of 32.
On the cold side, in 1986 the high was 26 with a low of 8. Other cold highs were 32 in 1983, 36 half a decade later in 1988 and 36 a decade after that in 1998. The record low of 4 and record coldest high of 15 were set on the same day way back in 1885. 26 of the last 30 lows were: 20s (14) and 30s (12). One low was in the colder single digits. Three lows were in the warmer 40s. No lows have been in the 10s (a.k.a. teens) over the last 30 years.
Today is a major day in Chicago's snow history. At O'Hare in 1965, this was the first of seven days in which a total of 10.2 inches fell. Today just a tenth of an inch fell.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:28 and sunrise is at 6:56. Sunset is at 19:06 and twilight ends at 19:34. Tomorrow twilight begins at 6:27 and sunrise is at 6:55. There's a total of 12 hours, 10 minutes of daylight today and 13 hours, 6 minutes between twilights. The moon is waning crescent and reached last quarter two days ago at 12:47. Illumination was 36% at midnight, will be 32% at noon and 27% at midnight tonight. Moonrise was at 3:55. Moonset is at 13:05. Moonrise is at 4:27 tomorrow. Moonlight time is 9 hours, 10 minutes which is 22 minutes longer than yesterday. Spring begins today (the vernal equinox) at 6:44.
April Fool's Day is in 12 days. -Bernie-
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