Unusually Mild Winter Continues

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
845 PM CST SAT JAN 28 2012 /945 PM EST SAT JAN 28 2012/

...THE 2011-2012 WINTER STILL ON TRACK TO BE AMONG MILDEST EVER
FOR CHICAGO AND ROCKFORD...

WHILE THERE HAVE BEEN A COUPLE SPELLS OF COLD AND SNOW THIS MONTH
OVERALL JANUARY 2012 IS GOING TO END UP WITH MUCH ABOVE AVERAGE
TEMPERATURES AT BOTH ROCKFORD AND CHICAGO. IN FACT...THE FIRST 2
MONTHS OF THE 2011-2012 WINTER ARE AMONG THE WARMEST OPENING TWO
MONTHS OF WINTER ON RECORD IN CHICAGO AND ROCKFORD. HERE IS A BREAK
DOWN OF THE WARMEST STARTS TO WINTER THROUGH JANUARY FOR BOTH
ROCKFORD AND CHICAGO...

       CHICAGO                         ROCKFORD
    AVG                                 AVG
    TEMP   YEARS                TEMP     YEARS
1)  37.5    1878-79             1)  32.8    1905-06
2)  36.0    1931-32             2)  32.2    1931-32
3)  35.8    1889-90             3)  31.3    1913-14
4)  35.5    1879-80             4)  30.9    2001-02
5)  35.0    1913-14             5)  29.8    2011-12*
6)  34.4    1875-76             6)  29.6    1932-33
7)  34.3    1918-19             7)  29.1    1982-83
8)  33.2    1881-82             8)  29.0    1933-34
9)  32.7    1932-33             9)  28.9    1918-19
10) 32.6    2001-02                 28.9    1943-44
11) 32.5    2011-12*           10) 28.5    2006-07

* = AVERAGE TEMPERATURE FOR 2011-12 IS BASED ON FORECAST HIGHS AND
    LOWS THROUGH TUESDAY AND THE FINAL NUMBER MAY VARY BY 0.1F OR SO
    IF FORECAST TEMPERATURES ARE SIGNIFICANTLY OFF THE NEXT COUPLE
    DAYS.

IT IS WORTH NOTING THAT MANY OF THE YEARS THAT WERE SEEMINGLY WARMER
IN CHICAGO OCCURRED PRIOR TO THE OFFICIAL WEATHER STATION BEING
MOVED FROM DOWNTOWN. COMPARING THIS YEARS TEMPERATURES AT O`HARE
TO READINGS TAKEN DOWNTOWN PRIOR TO 1942 IS NOT A VALID COMPARISON
SINCE DOWNTOWN TEMPERATURES ARE CONSISTENTLY WARMER DUE TO THE
EFFECTS OF THE URBAN HEAT ISLAND. THE OFFICIAL OBSERVING LOCATION
FOR CHICAGO WAS MOVED TO MIDWAY AIRPORT IN 1942 WHICH IS A MORE
REPRESENTATIVE COMPARISON. IF THE YEARS PRIOR TO THAT ARE EXCLUDED
THEN THIS WINTER WOULD BE A VERY CLOSE SECOND TO 2001-02 FOR THE
WARMEST.

$$

IZZI



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