Thunderstorms forming rapidly west and northwest of Chicago – heavy rain/strong winds/hail likely

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Thunderstorms are developing rapidly west and northwest of Chicago with stronger storms likely producing wind gusts in excess of 50 miles per hour and up to nickel-sized hail. Heavy downpours could cause localized flooding. Storms are moving northeast at 35 to 40 miles per hour.

As a cold front crosses the Mississippi River out of Iowa into western Illinois during the peak-heating part of the day late this afternoon, widespread thunderstorms are developing along and well in advance of the approaching frontal boundary.

Follow storms on the interactive radar at the top if the WGNTV page.

Latest Regional weather radar mosaic…

Central Great Lakes sector loop