Statewide water conditions are normal by most measures and in most areas, and that assessment does not include the rains received on or after Aug. 5. The only exception to normal conditions is a very small area in the southwest corner of the state which the drought monitor designates as in an abnormally dry condition. With the current rains this will likely push that area to normal conditions.
Temperatures in the past two weeks were mostly cooler, but also extreme compared to normal. Sidney had a high of 102 degrees on July 25, while Sheldon had a low of 46 degrees on the mornings of July 29 and 30. On average, the state was 3 degrees below normal during the past two weeks. Temperatures for all of July averaged 4.6 degrees below normal and the month ranks fifth lowest for July temperatures in 142 years of records.
Rainfall that occurred during the first two days of the two-week period covered in the Aug. 7 edition of the Water Summary Update dropped 4 inches in Fairfield and Montezuma; however, no measureable rain fell at Guthrie Center, Indianola, Osceola and Allerton in the past two weeks. The statewide average rainfall for the two weeks was 0.87 inches, less than one-half of the normal 1.92 inches.
Shallow groundwater levels are declining from the relatively high water levels of late June and early July. Areas with slightly below normal levels are Fremont County and the Ocheyedan, Floyd and Rock River systems.
For a thorough review of Iowa’s water resource trends, go to www.iowadnr.gov/watersummaryupdate. The next Water Summary Update will be issued Sept. 4, due to generally normal and stable water conditions across the state.
The report is prepared by the technical staff from the Iowa DNR, the Iowa Department of Agriculture and Land Stewardship, IIHR—Hydroscience and Engineering and the U.S. Geological Survey, in collaboration with The Iowa Homeland Security and Emergency Management Department.