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Overview

A line of thunderstorms formed across portions of western Minnesota and eastern South Dakota during the late afternoon hours of Friday August 18th.  These thunderstorms initially were capable of very large hail and damaging winds, with 67 mph winds measured in Minneota, MN.  

While strong storms continued to move through Lake Shetek, it was a strong cyclic supercell that formed on the tail end of this line that become the main weather story. This supercell produce large hail and strong winds, but also became a prolific tornado producer with multiple tornadoes moving across far southern Minnesota and into Northwest Iowa during the evening hours.  

Damage from these tornadoes was reported near Rushmore, MN, just west of Bigelow, MN, with the strongest tornado taking place further south near Melvin, IA. This tornado was rated EF-2 with peak winds of 125 mph.   The following tabs will provide a look at the radar, photos, and tornado rated information for this event.  

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Radar Loop of the Event
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Large Hail Near Wilmont, MN From Theresa Nequette Tornado Near Bigelow, MN from Jill Heidebrink Airplane Survey by Jordan E Grauer
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