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Heavy rainfall, flash flood risk for northern Illinois and southeast Wisconsin

newsApr 16, 2026

The Weather Prediction Center issued a Day 4 Marginal Risk Excessive Rainfall Outlook at 06:47 UTC April 16, warning of heavy rain and likely flash flooding across northern Illinois, southeast Wisconsin, and northwest Indiana. A WPC Excessive Rainfall Discussion at 04:09 AM EDT April 16 also highlighted a separate slight risk area extending from portions of the mid-Mississippi Valley into the southern Plains. Local National Weather Service offices are prepared to issue flash flood warnings as storms produce localized heavy downpours and urban and small-stream flooding becomes possible.

Key Highlights

WPC issued Day 4 Marginal Risk at 06:47 UTC April 16
Excessive Rainfall targets northern Illinois, southeast Wisconsin, and northwest Indiana
WPC 04:09 AM EDT discussion flagged slight risk in mid-Mississippi Valley
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