![]() Severe thunderstorms formed later in the afternoon as clearing skies allowed for atmospheric destabilization in the presence of high temperatures 20 degrees above normal. A deck of stratus clouds held temperatures in the upper 30s north to mid 40s south as a warm front lifted into southern Iowa along with anomalous moisture. Winds turned to the east in advance of a powerful low pressure center that was moving towards southwest Iowa on the 4th. Monthly precipitation totals ranged from 0.52 inch in Clive (Polk County) to 5.07 inches in Winterset (Madison County). Several stations in southwestern Iowa observed positive departures nearing an inch. Many of the state’s National Weather Service (NWS) co-op stations registered precipitation deficits on the order of an inch with pockets of two inches or more in southern and eastern Iowa. Heating degree day totals are running at a similar level to last year at this time and 2% less than normal.įor the second month in a row, unseasonably dry conditions were reported in Iowa. Home heating requirements, as estimated by heating degree day totals, averaged 27% less than last March and 2% less than normal. Atlantic and Audubon reported the week’s low temperature of 13 degrees on the 6th, on average 19 degrees below normal. Airports in Sioux City (Woodbury County) and Spencer (Clay County) reported the month’s high temperature of 92 degrees on the 12th, on average 33 degrees above average. Overall, temperatures for the month were near average across much of Iowa with pockets of slightly warmer temperatures as well.Īpril’s statewide average maximum temperature was 62.3 degrees, 2.2 degrees above normal while the average minimum temperature was 36.3 degrees, 0.9 degree below normal. Notably, average temperatures from April 12-15 were 15.1 degrees above normal with daytime high temperatures in the 80s and 90s across much of Iowa. Periods of unseasonably warm temperatures along with cooler than normal conditions were reported through April. A warmer April occurred in 2017 while April 2021 was drier. April 2023 ties 19 as the 71st warmest and ranks as the 36th driest in 151 years of statewide observational records. Temperatures averaged 49.3 degrees or 0.7 degree above normal while precipitation totaled 2.06 inches, 1.61 inches below normal. IOWA MONTHLY WEATHER SUMMARY – APRIL 2023
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