HAZARDOUS WEATHER OUTLOOK
Issue Date: 401 PM CST SUN DEC 20 2009
Expiration: 415 PM CST MON DEC 21 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
LIGHT SNOW IS EXPECTED THIS EVENING ACROSS THE OUTLOOK AREA. MINOR
ACCUMULATIONS OF GENERALLY AN INCH OR LESS ARE EXPECTED MAINLY
SOUTH OF A LINE FROM STERLING...TO KANKAKEE...TO RENSSELAER. SNOW
MAY COME DOWN QUICKLY ENOUGH TO CAUSE A FEW SLICK SPOTS ON ROADS
IN THESE AREAS THROUGH EARLY EVENING. SNOW WILL END FROM WEST TO
EAST DURING THE EVENING HOURS.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THERE IS A CHANCE FOR ADDITIONAL ACCUMULATING LIGHT SNOW LATE
MONDAY NIGHT INTO EARLY TUESDAY ACROSS THE OUTLOOK AREA. AT THIS
TIME...IT APPEARS THAT SNOWFALL AMOUNTS WOULD AGAIN BE AN INCH OR
LESS.
A MORE POTENT STORM SYSTEM IS EXPECTED TO AFFECT THE MIDWEST FOR
THE END OF THE WEEK...AND THE CHRISTMAS HOLIDAY. CURRENT
INDICATIONS ARE THAT AN AREA OF LOW PRESSURE WILL DEVELOP OVER THE
SOUTHERN PLAINS WEDNESDAY...THEN LIFT NORTHEAST ACROSS MISSOURI
INTO CENTRAL OR NORTHERN ILLINOIS THROUGH EARLY FRIDAY MORNING. IF
THE STORM WERE TO TAKE THIS TRACK...THIS COULD RESULT IN A PERIOD
OF MIXED PRECIPITATION INCLUDING SNOW...SLEET...FREEZING RAIN AND
RAIN DEVELOPING BY WEDNESDAY NIGHT AND CONTINUING THROUGH
THURSDAY. THIS WOULD ALSO IMPLY AN AREA OF HEAVY SNOW JUST
NORTHWEST OF THE FORECAST AREA...ACROSS PARTS OF IOWA AND
WISCONSIN. COLD AIR WRAPPING INTO THE BACK SIDE OF THE DEPARTING
LOW WOULD THEN SWITCH PRECIPITATION TO SNOW OR SNOW SHOWERS
FRIDAY. HOWEVER... IT IS IMPORTANT TO NOTE THAT THIS STORM IS
STILL SEVERAL DAYS AWAY AND THUS THE EVENTUAL STRENGTH AND TRACK
REMAIN UNCERTAIN. ANYONE PLANNING TRAVEL ACROSS THE MIDWEST LATER
THIS WEEK SHOULD CONTINUE TO MONITOR FURTHER FORECASTS AND
STATEMENTS FROM THE NATIONAL WEATHER SERVICE.
.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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