Written by Theresa Rose on April 14, 2015

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

Showers and thunderstorms were widespread across Iowa each day from Monday (6th) through Thursday (9th). Dry weather returned for Friday and Saturday. Finally, widespread showers and thunderstorms brought rain to much of the state late Sunday (12th) into Monday (13th) but fell too late to be included in this week’s totals. Scattered reports of large hail were received across southeast Iowa on Tuesday night as well as across central and southwestern areas on Wednesday. The most damaging severe weather occurred across eastern Iowa on Thursday with tornadoes confirmed in Clinton and northern Scott counties. Snow also accumulated from west central to north central Iowa Thursday afternoon with greatest amounts of two to four inches reported from parts of Crawford, Sac and Calhoun counties. However, all of the snow was melted by noon Friday. Rain totals varied widely each day with weekly totals varying from only 0.01 inches at Bettendorf to 4.45 inches at Lake Mills. The most widespread significant rainfall generally fell from west central into north central Iowa where one to two inch weekly totals were common. The statewide average precipitation was 0.88 inches while normal for the week is 0.74 inches. Temperatures also varied widely with daytime highs only in the forties over parts of northern Iowa from Tuesday through Friday while readings soared into the low eighties over potions of southeast Iowa on Thursday. There were scattered freezes on Monday (6th) and Friday (10th) mornings with a freeze over most of the northeast one-half of the state on Saturday (11th) morning. Strong southerly winds rapidly pushed temperatures back above seasonal normals by Saturday afternoon and into Sunday. Temperature extremes for the week varied from a low of 23 degrees at Belle Plaine on Saturday (11th) morning to a Thursday (9th) afternoon high of 81 degrees at Bloomfield and a Sunday (12th) afternoon high of 80 degrees at Little Sioux. Temperatures for the week as a whole averaged 2.7 degrees above normal. Soil temperatures at the four inch depth as of Sunday (12th) were averaging in the low to mid fifties over most of Iowa.