FREEZE WARNING: NWS Service ‘Low 28°F’; GFS Model ‘Low 36°F’

URGENT – WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
349 PM CDT WED APR 11 2012

…FREEZING TEMPERATURES EXPECTED TONIGHT…

WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF…ROCKFORD…BELVIDERE…WOODSTOCK…
WAUKEGAN…OREGON…DIXON…DEKALB…AURORA…WHEATON…CHICAGO…
OTTAWA…OSWEGO…MORRIS…JOLIET…KANKAKEE…PONTIAC…
WATSEKA…PAXTON…GARY…VALPARAISO…MOROCCO…RENSSELAER…
FOWLER

349 PM CDT WED APR 11 2012 /449 PM EDT WED APR 11 2012/

…FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/
TONIGHT TO 8 AM CDT /9 AM EDT/ THURSDAY…

* TEMPERATURES…WILL DROP BELOW 32 DEGREES AGAIN AWAY FROM
DOWNTOWN CHICAGO FOR SEVERAL HOURS TONIGHT INTO EARLY THURSDAY
MORNING. SEVERAL LOCATIONS WILL ALSO DROP BELOW 28 DEGREES FOR
A FEW HOURS…PRODUCING A HARD FREEZE.

* IMPACTS…WITH THE RECORD WARM MARCH SPURRING VEGETATION
GROWTH MUCH EARLIER THAN NORMAL…SENSITIVE VEGETATION MAY BE
DAMAGED OR KILLED BY THE FREEZING TEMPERATURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

The GFS or Global Forecast System numerical weather prediction computer run by NOAA predicts a low of 36°F at 3:00 a.m. and 4:00 a.m. Thursday, April 12, 2012, which does not coincide with the National Weather Service Chicago forecast of a low of 28°F.



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