Just How Cool Was It Tuesday?

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
654 PM CDT TUE JUN 2 2009 /754 PM EDT TUE JUN 2 2009/

...UNUSUALLY CHILLY DAY IN CHICAGO TUESDAY...

THE HIGH TEMPERATURE OFFICIALLY ONLY REACHED 60 DEGREES AT OHARE
INTERNATIONAL AIRPORT TUESDAY. IT IS NOT PARTICULARLY UNCOMMON TO
HAVE DAYS THIS COOL RIGHT ALONG THE LAKE THIS TIME OF YEAR...BUT
TO HAVE A HIGH ONLY REACH 60 AS FAR INLAND AS OHARE IS FAIRLY
UNUSUAL.

THE LOCATION WHERE "OFFICIAL" TEMPERATURE RECORDS FOR CHICAGO
HAVE BEEN TAKEN HAS CHANGED REPEATEDLY DATING BACK TO 1871 AND
SOME OF THE FORMER LOCATIONS HAVE BEEN MUCH CLOSER TO LAKE
MICHIGAN...WHERE THE CLIMATE REGIMES ARE MUCH DIFFERENT THAN THE
CURRENT LOCATION AT OHARE. SO WHILE IT MAY APPEAR BY LOOKING AT
DAILY RECORD TEMPERATURES FOR CHICAGO IN JUNE THAT HIGH
TEMPERATURES IN THE 50S ARE NOT ALL THAT UNCOMMON...CLOSER
EXAMINATION WOULD REVEAL THAT ALMOST ALL OF THE DAILY RECORD COLD
HIGH TEMPERATURE RECORDS FOR CHICAGO OCCURRED PRIOR TO RELOCATING
THE OFFICIAL CLIMATE LOCATION TO OHARE.

LOOKING AT CHICAGO TEMPERATURE RECORDS FOR JUNE DATING BACK ONLY
TO 1980 REVEALS THAT TODAY WAS INDEED UNUSUALLY COLD FOR JUNE. IN
FACT...THERE HAVE ONLY BEEN 14 DAYS WITH HIGHS COLDER THAN TODAY
AT OHARE IN JUNE...WHICH IS ROUGHLY 1.6 PERCENT OF ALL DAYS. EVEN
AT OHARE...THERE WERE TWO OTHER JUNE 2ND`S THAT WERE COLDER SINCE
1980...THE FIRST WAS BACK IN 2001 WHEN THE HIGH WAS 56 DEGREES AND
THE OTHER BACK IN 1993 WHEN THE HIGH TEMPERATURE WAS 58 DEGREES.
EVEN THOUGH TODAY DID NOT BREAK ANY RECORDS FOR COLD WEATHER...IT
WAS CERTAINLY NO BARGAIN TEMPERATURE-WISE IN CHICAGO!

$$

IZZI

 



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