EF3 tornado in Deuel County, South Dakota

A grain bin in a field near 496th Ave and 179th Street was ripped from the base and tossed a mile to the northeast. Roughly three and a half miles northeast on 176th St a farmstead lost several outbuildings and had roof and window damage to the home. Another two miles to the northeast three metal truss transmission towers were damaged, one completely twisted and collapsed. The strongest winds were confined to the area of the transmission towers. Roughly three and a half miles northeast, just north of US Highway 212, a shed was destroyed and a path was noted through a shelterbelt. The very last indications of the tornado was north of 169th Street on 476th Ave where the path was noted through a shelter belt.

Storms redeveloped in the late morning, with supercell characteristics across eastern South Dakota producing up to one inch diameter hail and winds of 70 mph, in addition to 6 confirmed tornadoes, one of which was rated EF3. Heavy rain also occurred with this system, with the greatest amount of rainfall measured by a CoCoRaHS observer being 4.69 inches measured near Columbia, and the highest COOP observer report coming out of Milbank with a two day total of 2.86. This heavy rain resulted in flooding in several rural locations but also included parts of Watertown and Aberdeen.