National Weather Service United States Department of Commerce

Overview

During the evening hours of August 5th, a line of thunderstorms moved through portions of southeast Minnesota, northeast Iowa and southwestern Wisconsin, producing pockets of wind damage along its track. Most notably, an embedded supercell tracked from far south-central Minnesota into northeast Iowa after sunset. This storm cycled and produced numerous circulations on radar along with at least three documented tornadoes in Mower County, MN and Allamakee County, IA. Additionally, heavy rainfall across the region produced localized flooding with rainfall reports of 1-2"--locally higher in spots.

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 Radar reflectivity animation of the storm complex as it moved through the region with tornado (red) and severe thunderstorm (yellow) watches and warnings. Watches are the large boxes while warnings are the smaller polygons.
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