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Widespread Damaging Winds Likely in the Northern Plains; Heat Continues in the Central and Southeast U.S.

Severe thunderstorms, heavy rainfall, and flooding are possible from the northern Rockies into the Upper Midwest. A derecho is likely across portions of the northern Plains, with several gusts expected to exceed 75 mph. Extreme heat is expected to intensify across much of the Southeast and Tennessee Valley, continuing through much of this week. Read More >

Overview

A QLCS-like line of storms quickly developed ahead of a blob of decaying convection that was moving northeast in southern MN. These new storms formed within a narrow corridor of uncapped, moderate MLCAPE with very high MLCAPE values in the lowest 3 km. While bulk shear magnitudes were borderline, the 0-3 km shear was normal to the line of storms, signaling some possibility of QLCS tornadoes. As the line of storms traveled through the Twin Cities, 5 EF0 tornadoes were confirmed in the southeast metro. Numerous trees were uprooted or broken and a few structures were damaged. Strong winds also caused damage and a 61 mph wind gust was measured at the grandstand of the Minnesota State Fair.

 

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