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

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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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