Thunderstorm Wind in De Kalb County, Illinois

Thunderstorm Wind August 18, 2025 · De Kalb County, Illinois

64 mph

Estimated gust (56 kt)

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Emergency management reported many trees, power poles, and power lines down along Ash Rd between N State Rd and IL Rt. 23 north of Genoa.

The wider storm

During the afternoon and evening of the 18th, a few rounds of thunderstorms brought torrential rainfall to much of northern Illinois resulting in flash flooding. One particularly strong storm also produced damaging winds in DeKalb County. Initial reports estimate $8.8 million in flood damages around northern and northeast Illinois, and around $2.5 million in the city of Chicago alone.

Began near Genoa (42.1172, -88.6956).

Source: NOAA Storm Events Database, event 1288274. Narratives are written by the National Weather Service forecast office that issued the report.

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