HAZARDOUS WEATHER OUTLOOK
Issue Date: 404 PM CST WED DEC 23 2009
Expiration: 415 PM CST THU DEC 24 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
PRECIPITATION WILL CONTINUE ACROSS THE ENTIRE
OUTLOOK AREA. PRECIPITATION SOUTH OF I-80 IS EXPECTED TO
PRIMARILY BE IN THE FORM OF RAIN...THOUGH A FEW POCKETS OF
FREEZING RAIN...SLEET...OR SNOW CAN`T BE RULED OUT. NORTH OF
I-80...FREEZING RAIN WILL MIX WITH SLEET AND PERHAPS A FEW SNOW
FLAKES THROUGH THE OVERNIGHT HOURS. TEMPERATURES ARE EXPECTED TO
REMAIN NEARLY STEADY THROUGH THE EVENING...WITH THOSE LOCATIONS
THAT HAVE NOT YET REACHED THE FREEZING MARK LIKELY NOT DOING SO
THROUGH THE OVERNIGHT HOURS.
WHILE THE EXACT TIMING OF TEMPERATURES RISING ABOVE FREEZING IS
UNCERTAIN AT ANY GIVEN LOCATION...IT DOES APPEAR THAT BY THURSDAY
AFTERNOON...SURFACE TEMPERATURES WILL HAVE TRANSITIONED TO ABOVE
FREEZING AT MOST LOCATIONS...CHANGING PRECIPITATION OVER TO RAIN.
WINTER WEATHER ADVISORIES ARE IN EFFECT FOR PORTIONS OF THE OUTLOOK
AREA. PLEASE REFERENCE THE LATEST WINTER WEATHER STATEMENTS FOR
THE LATEST FORECAST INFORMATION...AS WELL AS ANY CHANGES TO THE
CURRENT ADVISORIES IN EFFECT...ALONG WITH ANY ADDITIONAL
WATCES...WARNINGS...OR ADVISORIES THAT MAY BE ISSUED.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
PRECIPITATION WILL TRANSITION TO ALL RAIN DURING THE LATE MORNING
AND EARLY AFTERNOON ACROSS THE OUTLOOK AREA. PERIODS OF MODERATE TO
HEAVY RAINFALL WILL BE LIKELY THROUGHOUT THE DAY.
GIVEN THE POTENTIALLY HEAVY RAINFALL...COMBINED WITH MELTING SNOW
AND FROZEN GROUND...FLOODING OF RIVERS AND LOW LYING AREAS
APPEARS LIKELY.
COLDER AIR WILL THEN CIRCULATE AROUND THE STORM CENTER ALLOWING
PRECIPITATION TO CHANGE BACK TO LIGHT SNOW OR SNOW SHOWERS ON
CHRISTMAS DAY...WITH PERIODS OF LIGHT SNOW CONTINUING INTO SUNDAY
AS THE LOW CENTER DRIFTS OFF ACROSS THE MIDWEST.
A FLOOD WATCH HAS BEEN ISSUED FOR THE OUTLOOK AREA.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
HOWEVER...SPOTTERS ARE ENCOURAGED TO REPORT ANY ACCUMULATIONS OF
SLEET OR FREEZING RAIN...AS WELL AS ANY OBSERVED FLOODING...TO THE
NATIONAL WEATHER SERVICE IN CHICAGO.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
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