Severe Thunderstorm Warning Issued for Central Iowa
The National Weather Service (NWS) in Des Moines issued a Severe Thunderstorm Warning on September 8, 2026, at 5:50 p.m. CDT for several counties in central Iowa, including Polk, Story, Marshall, Jasper, and Boone. The storm, located near Alleman and moving east at 40 mph, brought 60 mph wind gusts and hail up to 0.75 inches in diameter. A Flash Flood Warning was also issued for Polk and eastern Dallas counties, with 1-2 inches of rain already reported and additional rainfall expected. The storm caused significant damage, including downed trees and power lines, leaving nearly 13,000 MidAmerican Energy customers without power in the Des Moines area. Streets in Des Moines were water-covered, with some areas experiencing several inches of flooding.