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Thunderstorms and Heavy Rain Across the Southern and Eastern US; Heat and Fire Weather Concerns in the West

Showers and thunderstorms are expected across the southern and eastern US this week, with heavy rain and localized flooding, particularly near the Gulf Coast. Monsoonal moisture will bring rain and potential flooding to parts of the Southwest. Heat and fire weather threats will continue to impact the West. Read More >

Overview

Two rounds of thunderstorms produced significant rainfall across portions of northern Illinois on Monday August 9th. A morning round of storms produced heavy rainfall across parts of northern Illinois, especially across portions of southern Boone and McHenry Counties where up to 3 to 4 inches of rain fell causing instances of urban and small stream flooding. 

 

The afternoon and evening thunderstorms were mainly supercells that produced numerous tornadoes, some of which caused noteworthy tree and structural damage in portions of Ogle, DeKalb, and Kane Counties. NWS Chicago issued a total of 13 Tornado, 2 Severe Thunderstorm, and 3 Special Marine Warnings between 3:00 PM and 10:15 PM. A total of 10 tornadoes were confirmed in the NWS Chicago County Warning Area (CWA). 

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Additional recaps can be found on the NWS Chicago Past Events Page
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