Live National Weather Service alerts, NEXRAD weather radar, USGS river and stream gauges, Storm Prediction Center convective outlooks, Local Storm Reports, 5-day forecast, air quality, and severe-weather notifications for McHenry County, IL (FIPS 17111) in Illinois. Free, no login, no ads.
McHenry County, IL is one of the counties of Illinois covered by BloomWX. McHenry County, IL has a population of approximately 311,133 (2022 estimate, US Census Bureau). The county covers 603.4 square miles of land area. The county seat is Woodstock.
Crystal Lake, Algonquin, Lake in the Hills, McHenry, Huntley.
McHenry County, IL is served by the National Weather Service LOT forecast office for warnings, watches, advisories, and decision-support services. The same office produces the Hazardous Weather Outlook, Area Forecast Discussion, and DSS briefing packets you'll see on the BloomWX dashboard for this county.
BloomWX also covers the surrounding counties: Kane County, IL, DeKalb County, IL, Cook County, IL, Boone County, IL, Walworth County, WI, Kenosha County, WI, Lake County, IL.
BloomWX is a free weather operations dashboard for SKYWARN storm spotters, emergency management volunteers, ham radio nets, and anyone in McHenry County, IL who needs the official NWS data without the consumer-app cruft. Data is pulled directly from weather.gov and refreshes every 60 seconds. Sources: National Weather Service, Storm Prediction Center, USGS Water Data, NOAA Space Weather Prediction Center, Open-Meteo (Air Quality), and the Citizen Weather Observer Program.
Read the BloomWX learn library for beginner-friendly explainers on every dashboard surface, including SPC convective outlooks (TSTM/MRGL/SLGT/ENH/MDT/HIGH), NEXRAD radar, USGS flood gauges, and WPC surface analysis charts. See all Illinois county weather dashboards on BloomWX.