National Weather Service United States Department of Commerce


Strong to severe thunderstorms rolled across the area from early afternoon through the late evening hours of Thursday, September 12th. The storms produced very heavy rainfall, resulting in flash flooding across portions of northeast Iowa and southwest Wisconsin, along with rises on many rivers and streams.

In addition, strong to damaging winds accompanied some of the storms.  EF-0 tornadoes touched down in rural Winneshiek County, Iowa just south of the town of Ossian, and in rural northwest Clayton County, Iowa southwest of Monona.




radar loop
Radar loop from 1 to 7 p.m. (Sept.12)
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