Icy Weather Headed to Chicago, Detroit

February 23, 2011; 3:25 PM ET
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Play video For more information on what to expect weather-wise across the Midwest, click on the above video.

Parts of the Midwest, including Chicago and Detroit, will be faced with icy weather into Thursday morning. Downed power lines are not a concern, but extremely treacherous travel is a danger.

Wednesday started with a narrow batch of ice over the mid-Mississippi Valley.

The band moved through St. Louis early in the morning, leaving a glaze of ice on elevated surfaces in the city's southern suburb of Oakville.

The ice danger waned Wednesday afternoon as temperatures climbed above freezing. However, the risk will quickly return tonight once temperatures cool and a storm system arrives.

Not a significant amount of ice is expected. However, it only takes a thin coating of ice to make untreated roads and sidewalks extremely slippery.

Any freezing rain over the Midwest into Thursday morning could slightly glaze trees, leading to a scene similar to what AccuWeather.com Facebook fan Jeff W. captured on Monday, Feb. 21, 2011, in southeast Jackson County, Mich.

The concern for freezing rain or sleet will shift to the lower Great Lakes tonight into Thursday morning. This includes the cities of Madison, Milwaukee, Chicago, Kalamazoo and Detroit.

South Bend, which just recorded a winter snow total of over 100 inches for the first time in nearly 30 years, also lies in the icy weather zone.

Similar to Wednesday, treacherous travel for both motorists and those on foot is the main concern with the ice tonight into early Thursday.

Adverse road conditions may force officials to delay the start of school Thursday morning.

Airline passengers could also be negatively impacted Thursday morning as crews work to de-ice planes.

The storm system set to deliver the icy weather over the lower Great Lakes is preceding a more potent storm, one that will threaten the Ohio Valley with snow and flooding rain Thursday into early Friday.

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