WITH RISING TEMPERATURES AND AN INCREASE IN MOISTURE OUT AHEAD OF
AN APPROACHING SURFACE LOW...LIGHT RAIN OR DRIZZLE...AND FOG WILL
DEVELOP ACROSS MUCH OF NORTHERN ILLINOIS AND NORTHWEST INDIANA
TODAY. THIS SURFACE LOW WILL THEN MOVE EAST THROUGH THE AREA
TONIGHT WITH AN ASSOCIATED COLD FRONT USHERING IN MUCH COLDER
AIR...PROVIDING A TRANSITION TO A WINTRY MIX AND THEN SNOW ON
TUESDAY.
CURRENT INDICATIONS ARE THAT THIS LIGHT RAIN WILL TRANSITION TO
LIGHT FREEZING RAIN LATE TONIGHT AND EARLY TUESDAY MORNING FOR
AREAS NORTHWEST OF A LINE FROM LA SALLE TO CHICAGO.
ALTHOUGH...THIS SHOULD BE A BRIEF WINDOW WITH NO ICE ACCUMULATION
EXPECTED. A TRANSITION TO ALL SNOW IS THEN EXPECTED TO OCCUR
THROUGH MID MORNING TUESDAY FOR ALL AREAS IN NORTHERN ILLINOIS AND
NORTHWEST INDIANA. BEFORE THE SNOW ENDS TUESDAY AFTERNOON...A FEW
INCHES OF SNOW CAN BE EXPECTED WITH LOCALLY HIGHER AMOUNTS
POSSIBLE.
DETAILS REGARDING FREEZING RAIN AND SNOWFALL POTENTIAL WILL LIKELY
NEED FURTHER REFINEMENTS AND PERSONS PLANNING TRAVEL ACROSS THE
REGION LATE TONIGHT AND TUESDAY SHOULD CLOSELY MONITOR LATER
FORECASTS AND STATEMENTS.
