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Thunderstorms Could Cause Flooding In Chicago Region

Spectators watch lightning light up the sky Thursday night at the Adler Planetarium. (CBS)

Spectators watch lightning light up the sky Thursday night at the Adler Planetarium. (CBS)

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CHICAGO (STMW) – A Thursday night thunderstorm could cause flooding in portions of Cook and DuPage counties.

The National Weather Service issued a flash flood warning portions of northern Cook and DuPage counties through 11 p.m. Excessive runoff from heavy rainfall will cause flooding of small creeks, streams, highways, streets, underpasses, drainage areas and other low lying spots, according to the weather service’s website.

A slow-moving thunderstorm with heavy rainfall was moving across northern Illinois Thursday night and was expected to drop 1 to 3 inches of rain by 11 p.m., the weather service said.

The weather service warns motorists not to cross water-covered bridges, dips or low water crossings.

A severe thunderstorm warning and watch were also issued for portions of the Chicago area prior to the storm’s approach.

Scattered thunderstorms could continue throughout the weekend.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2012. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)