National Weather Service United States Department of Commerce


An unseasonable strong storm system and rich moisture from the Gulf of Mexico produced severe thunderstorms across the Missouri Ozarks during the afternoon and evening hours of August 19th, 2018. A total of eight tornadoes were confirmed including six EF-0 tornadoes and two EF-1 tornadoes. The tornadoes near Diggins, Aurora, and Ritchey, Missouri were produced by low-topped (or mini) supercell thunderstorms. In contrast, the tornadoes over northern Barton and southern Vernon Counties in Missouri were associated with a line of thunderstorms referred to as a quasi-linear convective system (QLCS).


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