Written by Theresa Rose on August 30, 2016

By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship

The big weather news this week was the torrential rains and flooding over far northeast Iowa on Tuesday (23rd) into Wednesday (24th) morning. Widespread rain amounts of greater than four inches were common from Worth County eastward to Allamakee County and on into southwest Wisconsin. Heaviest rains were centered in Winneshiek County where 8.46 inches fell overnight at a location five miles southeast of Decorah. Record flooding occurred along portions of the Upper Iowa and Turkey rivers. Rain fell nearly statewide Tuesday night but with highly variable amounts. Another, much smaller area of excessive rain, fell across east central Nebraska and edged into southwest Harrison County where De Soto Bend National Wildlife Refuge picked up 5.38 inches. Otherwise there were thunderstorms scattered across the southern one-third to one-half of Iowa on Wednesday night and over much of Iowa on Friday night (26th) night into Saturday (27th) morning. Additional thunderstorms developed over the southern one-third of the state Sunday (28th) evening but largely fell too late to be reflected in this week’s crop statistics. Rain totals for the week varied from none over a small area extending from Onawa to just northwest of Sac City to 8.95 inches five miles southeast of Decorah. The statewide average precipitation was 1.19 inches, a little above the weekly normal of 0.91 inches. Temperatures for the week as a whole averaged right at normal. The warmest weather came on Sunday (28th) with highs reaching 91 degrees at Bellevue and Burlington while Monday (22nd) and Friday (26th) were the coolest days. Elkader reported the week’s lowest temperature with a Monday morning low of 48 degrees.