The first measurable snowfall of the season could occur on Tuesday throughout the Chicagoland, according to the National Weather Service. | Graphic via NWS

The National Weather Service has issued a winter weather advisory for northern Illinois, including Lake and McHenry counties, in anticipation of steady snow expected on Tuesday.

The weather advisory was issued Monday afternoon and will go into effect from 9 a.m. to 6 p.m. Tuesday.

Counties included in the advisory are Winnebago, Boone, McHenry, Lake, Ogle, Lee, DeKalb, Kane, DuPage and Cook.

“Slippery travel conditions due to steady snow expected [for] portions of north-central and northeast Illinois,” the NWS said in the advisory.

The NWS said Lake and McHenry counties have a 40-70% chance of measurable snow of at least one inch, with some areas of the two counties having more than a 70% chance.

Residents should expect precipitation developing Tuesday morning and a period of steady snow possible into the early afternoon.

Peak snow rates of up to one-half inch per hour are expected between noon and 3 p.m. Tuesday.

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Snow totals are expected to range from 1-3 inches by the time the snow ends.

Potential travel impacts include slippery roads due to snow and slush along with periods of poor visibility.

“Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained on the internet at,” the NWS said.