Flash flood warnings, watches issued

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Friday’s torrential rain has prompted a Flash Flood Warning for a portion of Chicagoland.

The National Weather Service has issued the warning for La Salle, Livingston and Grundy counties until 11:15 p.m.

A Flash Flood Watch is in effect until Midnight for most of the Chicago area in Illinois and Lake County Indiana.

Chicago-area counties include Winnebago, Boone, McHenry, Lake, Ogle, Lee, DeKalb, Kane, Du Page, Cook, LaSalle, Grundy, Will, Livingston, Kankakee, and Ford Counties in Illinois and Lake County Indiana. Iroquois County in Illinois as well as additional adjacent Indiana counties may be added to this Watch.


Strong thunderstorms with torrential potential flood-producing downpours are developing across the area south of Interstate-80. Storms are moving east-northeast and appear in some instances to be “training” – tracking over the same locations.

Repeated heavy rainfall will cause localized flooding problems.

Storms are expected throughout the evening. Some of these thunderstorms will produce very heavy rain.
Updates at Chicago Weather Center.