Westernmost Chicago area counties included in Flash Flood Watch for later tonight/Sunday morning

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Update 11:15PM CDT…

A Flash Flood Watch continues in effect for Winnebago, Ogle, Lee and LaSalle Counties tonight into Sunday morning. A complex of showers and thunderstorms will spread east and south across the Chicago area tonight with locally heavy 1 to 2-inch flooding rains in stronger storms that could also produce gusty winds and hail. See latest weather radar mosaic below.

Central Great Lakes sector loop


Winnebago, Ogle, Lee and LaSalle Counties have been included in a Flash Flood Watch (dark green-shaded areas on the highlighted map) for later tonight until noon CDT Sunday.

Anticipated strong thunderstorms with heavy potentially flood-producing downpours are forecast to develop tonight over eastern Iowa and western Illinois, possibly spreading into the westernmost counties along and west of Interstate-39. With soils saturated by 1 to 3-inch rains earlier this Saturday morning, almost instant runoff may occur with additional heavy rains in these counties, thus the issuance of the Flash Flood Watch.

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