IOWA PRELIMINARY WEATHER SUMMARYWritten by Theresa Rose on July 21, 2015
By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship
Hot and humid weather dominated Iowa for much of the reporting week. The hottest weather occurred on Monday (13th) and Friday (17th) while temperatures slipped below normal in some areas on Wednesday (15th) and Sunday (19th). The combination of heat and humidity pushed official heat indices to 111 degrees at Burlington on Monday and 110 degrees on Friday while unofficial readings went even higher elsewhere over southern Iowa. Actual temperatures peaked at 97 degrees at Des Moines on Monday and also at Bellevue, Lamoni and Osceola on Friday. Lowest temperatures were sunrise readings of 56 degrees at Cresco on Wednesday (15th) and at Estherville on Sunday (19th). Temperatures for the week as a whole averaged 3.3 degrees above normal. Most of the week’s rain fell between late Wednesday (15th) morning and Friday (17th) morning with heavy rains of two inches or more falling over most of the southern one-third of the state, as well as some west central sections of Iowa. Otherwise there were some scattered showers and thunderstorms over the northeast and southwest corners of Iowa on Monday (13th). Light to occasionally moderate rain also fell over far northern, western and southern Iowa on Saturday (18th). Finally, thunderstorms brought rain to far southern Iowa on Sunday (19th) morning. Weekly rain totals varied from 0.17 inches at Bellevue to 5.61 inches at Clarinda. The statewide average rainfall was 1.30 inches while normal for the week is 1.02 inches.