National Weather Service United States Department of Commerce



Severe thunderstorms developed across a good portion of eastern Iowa and northwest Illinois on the afternoon of Tuesday August 24th, 2021. A corridor of very strong winds was observed along the Highway 20 corridor from Fairbank IA, to Hazelton IA and to Manchester IA, where numerous reports of damage to trees, homes and power outages were received. Hail up to golf ball size was also observed in Manchester IA.

Storms continued to track south and east, with an outflow boundary producing strong winds into portions of northwest Illinois including the Quad Cities metro. Additional reports of wind damage were received across northwest Illinois, with a 66 MPH wind gust measured at the Savanna, IL AWOS. 




Surface Analysis Courtesy Weather Prediction Center (WPC)