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Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Overview

Thunderstorms developed during the afternoon of May 18, 2026 and quickly became severe across north central Kansas. Initial supercells produced hail up to half-dollar size and five tornadoes: two rated EF-1 and three rated EF-Unknown. Supercells congealed into a line as they moved southeast across northeast Kansas, producing wind gusts of 60-85 MPH. In addition, two EF-1 tornadoes spun up along the leading edge of the line of storms, making for a total of seven tornadoes on this day.

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Supercell near Morganville, KS (Photo by Daniel Reese)
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