HAZARDOUS WEATHER OUTLOOK
Issue Date: 1225 PM CST TUE DEC 22 2009
Expiration: 1230 PM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
SNOW WILL TAPER TO SCATTERED LIGHT SNOW SHOWERS TODAY ACROSS
MAINLY AREAS TO THE NORTH OF A LINE FROM ROCHELLE TO VALPARAISO.
SCATTERED LIGHT SNOW...SLEET...OR FREEZING RAIN IS EXPECTED TO
DEVELOP ACROSS AREAS TO THE SOUTH OF THIS ROCHELLE TO VALPARAISO
LINE THIS EVENING AND DURING THE OVERNIGHT HOURS. UNTREATED AREA
ROADS MAY CONTINUE TO BE SLIPPERY THIS AFTERNOON AND TONIGHT.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
A STRONGER STORM SYSTEM IS EXPECTED TO DEVELOP OVER THE SOUTHERN
PLAINS TODAY AND WEDNESDAY...AND WILL INTENSIFY AS IT LIFTS NORTHWARD UP
THE MISSISSIPPI VALLEY WEDNESDAY THROUGH FRIDAY. THIS WILL
RESULT IN A PERIOD OF SNOW...SLEET AND FREEZING RAIN...DEVELOPING
AS EARLY AS WEDNESDAY MORNING...AND CONTINUING INTO THURSDAY
MORNING...BEFORE PRECIPITATION GRADUALLY CHANGES TO ALL RAIN
DURING THE DAY THURSDAY. 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 UPPER
MIDWEST.
A WINTER STORM WATCH IS NOW IN EFFECT FOR PORTIONS OF THE OUTLOOK
AREA. PLEASE REFERENCE THE LATEST WINTER WEATHER STATEMENTS FROM
THE NATIONAL WEATHER SERVICE FOR THE LATEST FORECAST
INFORMATION...AS WELL AS ANY ADDITIONAL WATCHES...WARNINGS...OR
ADVISORIES THAT MAY BE ISSUED.
THIS STORM SYSTEM HAS THE POTENTIAL TO IMPACT TRAVEL DURING THE
CHRISTMAS HOLIDAY PERIOD...ESPECIALLY FOR THOSE HEADING WEST ACROSS
IOWA...AND NORTH INTO MINNESOTA AND WISCONSIN. PERSONS PLANNING
TRAVEL ACROSS THE MIDWEST BETWEEN WEDNESDAY AND SATURDAY SHOULD
MONITOR FURTHER FORECASTS AND STATEMENTS FOR THE LATEST
INFORMATION ON THIS DEVELOPING WINTER STORM.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT...
HOWEVER SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL TOTALS TO THE
NATIONAL WEATHER SERVICE CHICAGO.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
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