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Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later 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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