More Interesting Stats About Winter 2011-2012 and January 2012 in Chicago and Rockford

*Corrected rankings after initial issuance*
CHICAGO

AT CHICAGO-OHARE...THE OFFICIAL OBSERVATION SITE FOR THE CITY OF
CHICAGO SINCE 1980...THE FIRST TWO MONTHS OF THE 2011-2012
METEOROLOGICAL WINTER WERE REMARKABLY MILD. METEOROLOGICAL WINTER
RUNS FROM DECEMBER 1 THROUGH THE END OF FEBRUARY.

HERE IS WHERE IT RANKS AMONGST THE WARMEST STARTS TO WINTER...IN
TERMS OF AVERAGE TEMPERATURE...SINCE RECORDS BEGAN IN 1871 IN
CHICAGO.

1) 37.5...1878-1879   6) 34.4...1875-1876
2) 36.0...1931-1932   7) 34.3...1918-1919
3) 35.8...1889-1890   8) 33.2...1881-1882
4) 35.5...1879-1880   9) 32.7...1931-1932 & 2011-2012**
5) 35.0...1913-1914  11) 32.6...2001-2002

**FROM 1942 TO 1980...THE OFFICIAL OBSERVATION STATION WAS LOCATED
AT MIDWAY AIRPORT. FROM 1871 TO 1942...THE OFFICIAL OBSERVATIONS
WERE TAKEN IN DOWNTOWN CHICAGO...WHERE TEMPERATURES ARE CONSISTENTLY
WARMER DUE TO THE MODERATING INFLUENCE OF THE LAKE AND THE EFFECTS
OF THE URBAN HEAT ISLAND. THEREFORE...THE WARM START TO THIS
WINTER...AGAIN JUST ABOVE THAT OF 2001-2002 THROUGH JANUARY
31ST...IS THE WARMEST SINCE THE OFFICIAL OBSERVATIONS HAVE BEEN
TAKEN OUTSIDE DOWNTOWN CHICAGO.

HERE ARE THE WARMEST STARTS TO WINTER IN CHICAGO SINCE THE WINTER OF
1942-1943.

1) 32.7...2011-2012*              7) 30.6...1949-1950
2) 32.6...2001-2002               8) 30.5...1997-1998
3) 31.9...1959-1960               9) 30.4...1957-1958
4) 31.1...1982-1983              10) 30.3...1946-1947
5) 30.8...2006-2007 & 1952-1953  11) 30.1...1988-1989

JANUARY 2012...WITH AN AVERAGE TEMPERATURE TEMPERATURE OF 30.2
DEGREES...WAS 6.4 DEGREES ABOVE THE 1981-2010 NORMAL. IT WAS TIED
FOR THE 20TH WARMEST ON RECORD IN CHICAGO WITH 1890-1891. THE
ALL-TIME WARMEST JANUARY ON RECORD WAS IN 1880...WITH AN AVERAGE
TEMPERATURE OF 39.8 DEGREES. HOWEVER...IN THE CONTEXT OF JANUARYS
SINCE 1943...HERE ARE THE WARMEST.

1) 35.8...2006   6) 30.2...2012*
2) 33.9...1990   7) 29.5...1964 & 1998
3) 32.4...1989   9) 29.4...1950
4) 31.9...2002  10) 29.2...1953
5) 31.3...1944  11) 28.8...1967

FINALLY...SOME INTERESTING SNOW STATS. SO FAR THIS SEASON...13.9
INCHES HAVE BEEN RECORDED AT CHICAGO-OHARE...5.4 INCHES BELOW THE
1981-2010 NORMAL OF 19.3 INCHES FOR THE DECEMBER-JANUARY PERIOD.
HOWEVER...IN JANUARY 2012...12.2 INCHES FELL...WHICH IS ACTUALLY
1.4 INCHES ABOVE NORMAL AND GREATER THAN THE 11.1 INCHES RECORDED
IN JANUARY 2011. DECEMBER 2010 WAS FAR SNOWIER THAN DECEMBER 2011
THOUGH...THUS THE SEASONAL TOTAL THROUGH JANUARY 2011 WAS 27.3
INCHES FOR THE 2010-2011 WINTER.

THE UNUSUAL WARMTH THIS WINTER HAS REALLY MADE ITS MARK WITH THE
NUMBER OF DAYS WITH AT LEAST 1 INCH OF SNOW ON THE GROUND.
SINCE SNOWFALL RECORDS HAVE BEEN KEPT IN CHICAGO...DECEMBER AND
JANUARY HAVE AVERAGED 25 DAYS WITH AT LEAST 1 INCH OF SNOW ON THE
GROUND...WITH 10 DAYS IN DECEMBER AND 15 DAYS TYPICALLY IN
JANUARY. SO FAR IN WINTER 2011-2012...THERE HAVE ONLY BEEN 8 DAYS
WITH AT LEAST 1 INCH OF SNOW ON THE GROUND AT
CHICAGO-OHARE...INCLUDING 1 IN DECEMBER AND 7 IN JANUARY. IN SHARP
CONTRAST...AND SIMILAR TO THE 3 WINTERS PRIOR TO IT...THE WINTER
OF 2010-2011 HAD 46 DAYS WITH AT LEAST 1 INCH OF SNOW ON THE
GROUND AT CHICAGO-OHARE THROUGH THE END OF JANUARY. THIS INCLUDED 27
DAYS IN DECEMBER AND 19 IN JANUARY.

$$

ROCKFORD

AT ROCKFORD AIRPORT...THE OFFICIAL OBSERVATION SITE FOR ROCKFORD
IL...THE FIRST TWO MONTHS OF THE 2011-2012 METEOROLOGICAL WINTER
WERE REMARKABLY MILD. METEOROLOGICAL WINTER RUNS FROM DECEMBER 1
THROUGH THE END OF FEBRUARY.

HERE IS WHERE IT RANKS AMONGST THE WARMEST STARTS TO WINTER...IN
TERMS OF AVERAGE TEMPERATURE...SINCE RECORDS BEGAN IN 1905 IN
ROCKFORD.

1) 32.8...1905-1906   6) 29.6...1932-1933
2) 32.2...1931-1932   7) 29.1...1982-1983
3) 31.3...1913-1914   8) 29.0...1933-1934
4) 30.9...2001-2002   9) 28.9...1918-1919
5) 30.0...2011-2012* 10) 28.7...1907-1908 & 1943-1944

JANUARY 2012...WITH AN AVERAGE TEMPERATURE OF 27.4 DEGREES..WAS
5.9 DEGREES ABOVE THE 1981-2010 NORMAL OF 21.5 DEGREES. IT WAS THE
14TH WARMEST JANUARY ON RECORD IN ROCKFORD. HERE ARE THE WARMEST
JANUARYS IN DESCENDING ORDER.

1) 33.9...1933               10) 29.4...1921
2) 33.5...2006               11) 29.2...1931
3) 30.1...1934 & 1944        12) 29.0...1914
5) 30.0...1932, 1990 & 2002  13) 28.9...1939
8) 29.9...1989               14) 27.4...2012*
9) 29.8...1906

FINALLY...SOME INTERESTING SNOW STATS. SO FAR THIS SEASON...14.1
INCHES OF SNOW HAVE BEEN RECORDED AT ROCKFORD AIRPORT...7.4 INCHES
BELOW THE 1981-2010 NORMAL FOR THE DECEMBER-JANUARY PERIOD.
HOWEVER...IN JANUARY 2012...12.4 INCHES FELL...WHICH WAS ACTUALLY 2.4
INCHES ABOVE NORMAL AND GREATER THAN THE 11.8 INCHES RECORDED IN
JANUARY 2011. DECEMBER 2010 WAS FAR SNOWIER THAN DECEMBER 2011
THOUGH...THUS THE SEASONAL TOTAL THROUGH JANUARY 2011 WAS 31.0
INCHES FOR THE 2010-2011 WINTER.

THE UNUSUAL WARMTH THIS WINTER HAS REALLY MADE ITS MARK WITH THE
NUMBER OF DAYS WITH AT LEAST 1 INCH OF SNOW ON THE GROUND. SINCE
SNOWFALL RECORDS HAVE BEEN KEPT IN ROCKFORD..DECEMBER AND JANUARY
HAVE AVERAGED 23 DAYS WITH AT LEAST 1 INCH OF SNOW ON THE
GROUND...WITH 9 DAYS IN DECEMBER AND 14 DAYS IN JANUARY. SO FAR IN
WINTER 2011-2012...THERE HAVE ONLY BEEN 16 DAYS WITH AT LEAST 1
INCH OF SNOW ON THE GROUND AT ROCKFORD AIRPORT...INCLUDING 2 IN
DECEMBER AND 14 IN JANUARY. IN SHARP CONTRAST...AND SIMILAR TO THE
3 WINTERS PRIOR TO IT...THE WINTER OF 2010-2011 HAD 48 DAYS WITH
AT LEAST 1 INCH OF SNOW ON THE GROUND THROUGH THE END OF JANUARY.
THIS INCLUDED 27 DAYS IN DECEMBER 2010 AND 21 DAYS IN JANUARY
2011.

$$

RC


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