SNOW WILL RAPIDLY OVERSPREAD THE AREA EARLY THIS EVENING...WITH SNOW POSSIBLY BECOMING HEAVY AT TIMES. THERE IS A CHANCE FOR SOME THUNDER SNOW...WITH VISIBILITIES LIKELY FALLING BELOW A HALF MILE DURING THE PERIODS OF HEAVIEST SNOW. SNOWFALL RATES OF UP TO AN INCH PER HOUR ARE POSSIBLE AT TIMES THIS EVENING...WITH TOTAL ACCUMULATIONS OF ONE TO THREE INCHES LIKELY BY MIDNIGHT.

THE HEAVIEST SNOWFALL WILL LIKELY OCCUR OVER NORTH CENTRAL ILLINOIS BETWEEN 6 AND 9 PM...AND OVER NORTHEAST ILLINOIS INCLUDING THE CHICAGO METROPOLITAN AREA BETWEEN 7 PM AND 10 PM. SNOW WILL END LATE THIS EVENING OR SHORTLY AFTER MIDNIGHT.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.