The Chicago National Weather Sevice Forecast Office has issued a Winter Weather Advisory for Lake and McHenry Countes in Illinois for up to three inches of snow causing hazardous travel conditions especially on untreated roads and highways later Thursday afternoon into the evening hours.
Early this Thursday morning a mix of freezing rain, sleet and snow will spread across northeast Illinois into the Chicago area. However temperatures are expected to rise above freezing during the forenoon Thursday, resulting in the mixed precipitation changing over to a cold rain. Travel conditions for the morning commute - especially the early commuters could be troublesome, but when the precipitation becomes all rain - conditions should improve significantly.
As the center of low pressure passes through Illinois into Indiana, colder air will ride west to northwest winds into the area and rain will gradually change over to wet snow from the west during the afternoon into the evening hours.
Below is the statement issued by the National Weather Service and the associated map depicting the two Ilinois counties under the Winter Weather Advisory.
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER
WEATHER ADVISORY...WHICH IS IN EFFECT FROM 4 PM TO 9 PM CST
THURSDAY FOR LAKE AND MCHENRY COUNTIES, INCLUDING THE CITIES
OF WAUKEGAN AND WOODSTOCK.
THE WINTER STORM WATCH IS NO LONGER IN EFFECT.
* TIMING...ACCUMULATING WINTRY PRECIPITATION IS POSSIBLE AS EARLY
AS LATE THURSDAY AFTERNOON...BUT MORE LIKELY THURSDAY EVENING.
* PRECIPITATION...SOME LIGHT SLEET...SNOW...OR POSSIBLY A TOUCH OF
FREEZING RAIN IS POSSIBLE LATER TONIGHT INTO EARLY THURSDAY
MORNING...BEFORE TEMPERATURES RISE ABOVE FREEZING CHANGING THE
PRECIPITATION TO ALL RAIN. WITH TEMPERATURES NEAR OR JUST ABOVE
FREEZING THE CHANCE OF ANY APPRECIABLE ACCUMULATION LATE TONIGHT
INTO EARLY THURSDAY MORNING APPEARS LOW. RAIN IS EXPECTED TO MIX
WITH AND CHANGE OVER TO WET SNOW LATE THURSDAY AFTERNOON OR
THURSDAY EVENING. A PERIOD OF MODERATE SNOW IS POSSIBLE THURSDAY
EVENING WITH SOME SNOW ACCUMULATION EXPECTED AT THAT TIME.
* ACCUMULATION...SNOW ACCUMULATIONS OF 1 TO 3 INCHES ARE POSSIBLE