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Strong Winds and Flood Watch Hit Northern Illinois

Northern Illinois, USAThursday, June 18, 2026
A wind alert is in place for several northern Illinois counties as a storm moves through the area. The warning covers Boone, DeKalb, Lee, Ogle, Winnebago and parts of Cook, DuPage, Lake, Kane and McHenry counties. It started at 10:46 a. m. and will end by 1 p. m. The National Weather Service said winds may reach up to 50 miles per hour. Strong gusts can toss unsecured items and knock down tree branches, potentially causing power outages. Drivers should be careful, especially in high‑profile vehicles. People are urged to tie down outdoor furniture and other loose objects. This wind event comes before a larger storm system that could bring heavy rain. Many northern Illinois counties are under a flood watch until later Wednesday. Creeks and streams may overflow, especially in McHenry, Boone, DeKalb, Lee, Ogle and Winnebago counties. The forecast calls for up to two inches of rain in some spots within an hour.
The ground is already wet, and water levels are high. Quick flooding could affect low‑lying areas, farms, backyards and roads more than the rivers themselves. The emergency manager in McHenry County noted that flash floods are a real danger. By the afternoon, the threat of severe weather rises. Hail and strong winds are expected, and tornadoes cannot be ruled out. All hazards are possible today, according to the county’s emergency director. If you live in a basement that has flooded before or is vulnerable, raise any valuable items. Keep furnaces and appliances out of water. In case of wind or tornadoes, stay indoors and find a safe spot.

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