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Severe Thunderstorms Knock Out Power for 170,000 as Storm Line Moves East

Forecasters predict the storm cluster will reach the Illinois border by Wednesday morning, raising flash flood concerns on saturated soils.

In this aerial image from a drone, derecho-damaged grain bins are shown at the Heartland Co-Op grain elevator on August 11, 2020, in Luther, Iowa.
FILE - Rod Pierce looks at grain drying bins on his farm that were damaged in the derecho earlier this month, Aug. 20, 2020, near Woodward, Iowa. (AP Photo/Charlie Neibergall, file)
FILE- Wind fueled fires burn in a pasture which was part of a fire that burned and stretched across Ellis, Russell, Osborne and Rooks counties, Dec. 16, 2021, near Natoma, Kan. (AP Photo/Charlie Riedel, file)
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Overview

  • Storms produced gusts over 90 mph in Spencer, Iowa, and over 75 mph elsewhere, uprooting trees and downing power lines across the Upper Midwest.
  • More than 170,000 customers in South Dakota, Minnesota, Iowa and Wisconsin remain without electricity following storm damage.
  • Authorities confirmed a tornado in Dixon, South Dakota, and warn of continued isolated tornado and hail threats as the system advances.
  • The derecho-like storm line is expected to push through Nebraska and reach the Illinois border by dawn, with Chicago-area thunderstorms likely Wednesday afternoon.
  • Heat advisories and extreme heat warnings span nearly half the U.S., amplifying flash flood and health risks on already saturated grounds.