National Weather Service United States Department of Commerce


A strong storm system moved through the central U.S. on March 28, 2020. This brought a strong warm front northward into northeast Iowa and far southwest Wisconsin. Thunderstorms formed during the afternoon hours north of the warm front and brought many reports of small hail covering the ground. In the late afternoon and early evening, storms formed near the warm front and produced brief tornadoes which caused damage in Oelwein, Iowa, near Maynard, Iowa, and north of Potosi, Wisconsin.

Radar Loop of the Tornado-producing Time Frame
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