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Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Overview

Severe thunderstorms marched across northeastern Wyoming and the Black Hills area the afternoon and evening of July 17, 2019. Tennis ball to baseball size hail was reported around Gillette and the northern Black Hills, and a tornado occurred near Four Corners, Wyoming. Higher concentrations of cloud-to-ground lightning flashes can be seen in these areas in the image to the right.

24-h CG lightning ending 6 am July 18th, 2019
24-hour cloud-to-ground lightning from 6 am July 17 to 6 am July 18, 2019
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