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Tuesday A.M. Storm Complex Preliminarily Defined as Derecho; Also Three EF1 Tornadoes
Event Summary: August 7th Very Large Hail, Damaging Winds and Tornadoes

Scattered Severe Storms Today

Warm and Humid Today

Isolated Severe Storms Thursday

Recap of the August 11th, 2026 Morning Derecho

Another round of storms is expected this morning, with the greatest coverage along and south of Hwy 30. Some of these storms could become severe, with damaging wind and heavy rain the primary threats. Storms to exit the area by early afternoon.

Another warm and humid day is forecast today, especially for northeast MO, southeast IA, and west central IL where peak heat indices will top out in the upper 90s to low 100s. Morning storms and cloud cover may limit the overall heat risk along and north of I-80 today.

Another round of showers and storms is possible Thursday, with isolated severe during the late afternoon through the late evening/overnight. Primary threats will be damaging wind, hail, and heavy rain. Storms that repeat over the same area may also bring a flash flood risk.

Here's a recap of the severe storms that occurred on the morning of August 11th. This storm complex has preliminarily been confirmed as a derecho, with many reports of significant wind damage. Also, an official NWS Storm Survey team confirmed that three EF1 tornadoes occurred in Delaware county, IA.

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