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Stormy Weekend in the Tri States

Steve Cirinna
Thunderstorm rolling through Lee County, Iowa on Sunday, June 20, 2021.

The National Weather Service (NWS) is not reporting any significant damage or injuries from Sunday night's storms across the region.

A trained weather spotter called in with an estimated wind gust of 60 miles per hour in McDonough County, and Des Moines County reported heavy rainfall.

The NWS said the storms were set up mid-afternoon Sunday by clearing skies, which provided some surface heating ahead of an approaching cold front.  Ahead of this front, several discrete supercell thunderstorms formed, and then later in the day these supercells generally grew upscale into a line of thunderstorms with embedded supercell structures.

The NWS office in the Quad Cities said a tornado was spotted in Dubuque County, Iowa, causing some damage to trees and farm outhouses, but otherwise it received severe wind reports and a few hail reports from these storms.

The agency also noted a spring cold front passage greeted us on the first day of summer with temperatures much cooler than what we have seen of late.

Late Friday Night/Early Saturday Morning

The NWS said the most intense storms on June 18 and 19 produced very large hail and damaging wind gusts.  Hail around 1.5 inches in diameter and tree damage were reported, especially in far southeast Iowa and northwest Illinois.

The NWS said repeat thunderstorms produced very heavy rainfall with reports of up to four inches. The agency said no high impact flash flooding was reported due to the recent dry conditions.