National Weather Service United States Department of Commerce


Torrential rainfall, flash flooding, and major river flooding occurred during the last two weeks of September across northeast Iowa, eastern Iowa, and along the Mississippi river.  Many locations saw rivers rise to levels not seen since the 2008 flood.  Heavy rain fell in the Cedar, Iowa, Wapsipinicon, and Maquoketa river basins over northern Iowa and western Wisconsin between Wed Sept 21st and Friday Sept 23rd.  Many towns along these rivers and their tributaries were inundated with flood waters. 

The 2nd highest crest was recorded on the Cedar River at Cedar Rapids, with a preliminary crest of 21.97' on Sep 27th.  The Wapsipinicon river at De Witt also recorded a preliminary crest of 13.86' on Sept 30th, putting it at the 4th highest crest on record.

September 2016 Rainfall Amounts Across the Midwest
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30-day Observed Precipitation Ending 9/23/16 30-day Departure from Normal Precipitation Ending 9/23/16 30-day Percent of Normal Precipitation Ending 9/23/16
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