Thunderstorm Wind in De Kalb County, Illinois

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

60 mph

Estimated gust (52 kt)

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

What the National Weather Service wrote

Three power poles were downed along Old State Rd between Five Points Rd and Church Rd west of Sycamore.

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 Wilkinson (42.0081, -88.7536).

Source: NOAA Storm Events Database, event 1288299. Narratives are written by the National Weather Service forecast office that issued the report.

Tornadoes near your address

See every tornado that passed near a place you know, measured to its path.