National Weather Service United States Department of Commerce

Cold Front Dropping South Across the Western U.S.; Watching Threat for Tornadoes and Flooding in the South

A cold front will push south across the Western U.S. into Tuesday with mountain snow and areas of gusty to high winds. An area of low pressure will form along this front on Tuesday and bring a potential for severe thunderstorms with tornadoes and excessive rainfall in the lower to mid Mississippi River Valley. To the north, heavy snow is possible in parts of the upper Midwest. Read More >

Overview

Scattered thunderstorms quickly became numerous along the I-88 corridor on the early afternoon of Friday, July 29th.  These were extremely slow moving, leading to large totals in a short amount of time.  With antecedent wet conditions, this rainfall brought flash flooding to DeKalb, Kane, DuPage, and Cook Counties.  Some of the flooding persisted into the day after.  In addition, the DuPage River at Bolingbrook reached a top 10 crest in its ~20 year period of record.

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Rainfall Estimated from Bias-Corrected Radar
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Additional recaps can be found on the NWS Chicago Past Events Page
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