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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 occurred during the late afternoon and evening hours as a strong cold front moved into the area. Surface low pressure moved across central Illinois during the late afternoon hours, with our region well into the systems warm sector. High temperatures soared into the mid 80s in many locations, which helped to prime the atmosphere for severe thunderstorm development. Discrete storms formed over southeast Missouri and far southwest Illinois initially around 5 PM and quickly became severe. These storms continued to push east/southeastward into the evening hours. As the cold front approached from the northwest, a line of storms moved into the I-64 corridor but seemed to lose their intensity as they progressed across the Wabash Valley and Evansville Tri-State region. While a few wind damage reports were received, the main impact from these storms was large hail ranging from quarter sized to greater than golf balls. The largest hailstones observed were 2.25" in diameter in Sikeston, MO.
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