National Weather Service United States Department of Commerce

Tracking Two Storms Impacting the Central and Eastern U.S. Through This Weekend

Two storm systems will track through the central and eastern U.S. through this weekend with areas of gusty winds, rain, and heavy snow. Severe thunderstorms are forecast Friday from the central Gulf Coast into parts of the lower Mississippi, Tennessee and Ohio Valleys. Heavy to excessive rainfall is forecast from the lower Mississippi River Valley to the Tennessee Valley which may bring flooding. Read More >

Overview

An extremely humid and unstable air mass on Saturday July 23 set the stage for strong to severe storms to develop mid to late afternoon along the I-90 corridor in far northern Illinois.  These storms ended up shifting very slowly southeast, bringing flash flooding to parts of Belvidere and Rockford, as well as near the Lake and Cook Counties border.  Severe winds with gusts around 60 mph were scattered within this area.  Another potent round of storms developed across northeast Iowa and moved eastward into northern Illinois around sunset.  These brought isolated severe winds in north central Illinois as well as additional heavy rainfall.

Shelf Cloud - Chicago
Shelf cloud on the leading edge of storms as they move into Chicago.        Courtesy of Barry Butler.
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