IOWA PRELIMINARY WEATHER SUMMARYWritten by Theresa Rose on August 4, 2015
By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship
The past reporting week began with very warm and humid weather prevailing through Tuesday (28th). Actual temperatures peaked at 95 degrees at Lamoni while the heat index reached 109 degrees at Burlington on Tuesday. A wide band of thunderstorms brought rain from northwest, through central, into south central Iowa on Monday (27th). Another area of thunderstorms moved through all but far northwest Iowa between early Tuesday (28th) morning and early Wednesday (29th) morning. Torrential rains fell with this second round of storms on Tuesday night across parts of south central Iowa. Cooler and mostly dry weather prevailed on Wednesday and Thursday with temperatures falling as low as 52 degrees at Sheldon on Thursday (30th) morning. Warmer and more humid weather returned for the weekend with scattered thunderstorms over the southern one-half of the state. Sunday (2nd) was the warmest day of the weekend with Donnellson reaching 94 degrees. Temperatures for the week as a whole averaged 1.5 degrees above normal. Weekly rain totals varied from only 0.09 inches at Oakland and 0.10 inches at Bellevue to 7.46 inches near Spring Hill in Warren County. The statewide average precipitation was 1.63 inches while normal for the week is 0.94 inches. The statewide average precipitation has been above normal for seven of the past eight weeks. However, precipitation amounts have been highly variable over the state during this eight-week period with very heavy rains over much of the southern one-third of Iowa while portions of the northern one-third have been drier than usual.