IOWA PRELIMINARY WEATHER SUMMARYWritten by Theresa Rose on May 30, 2018
By Michael Timlin, Regional Climatologist, Midwestern Regional Climate Center
Temperatures were above normal across the state while most of the state saw below average rainfall. Temperatures warmed through the week with maximum temperatures in the upper 50s and 60s early in the week climbing to the 90s by the end of the week in all but the northeastern corner of the state. Minimum temperatures climbed from the upper 40s and 50s to the 60s later in the week. The coolest temperature recorded during the week was 47 degrees at Sibley on the 21st while the warmest reading was 101 degrees at Red Oak on the 26th . With the rising temperatures, soil temperatures also rose from the upper 50s and 60s into the 70s by the end of the week. Widespread precipitation on the 21st gave way to scattered rain for the rest of the week. Severe weather on the 25th included strong winds and large hail. Wind reports over 60 mph and reports of trees and limbs downed along with large hail up to 2.00 inches in diameter came in from central to northeastern Iowa. Above normal precipitation was reported at only some locations in the northeastern third of the state while totals were less than 0.20 inches for many locations in the southwestern half of the state. Viewed as a percentage of normal, the rainfall ranged from 200 percent of normal to less than 10 percent of normal. The highest rainfall total was recorded at Estherville in Emmet County with 2.67 inches including 2.39 inches on the 23rd. The driest location was nearby at Primghar in O’Brien County where no precipitation fell during the week.