Severe Thunderstorm Watch — McHenry County, Illinois
Conditions favor the development of severe thunderstorms in and near the watch area.
Current Status
⛈️ Active: Severe Thunderstorm Watch
Severe Thunderstorm Watch issued August 9 at 9:46AM CDT until August 9 at 2:00PM CDT by NWS Chicago IL
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 546 IN EFFECT UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 2 COUNTIES IN NORTHEAST ILLINOIS LAKE IL MCHENRY THIS INCLUDES THE CITIES OF ALGONQUIN, BUFFALO GROVE, CRYSTAL LAKE, GURNEE, MCHENRY, MUNDELEIN, WAUKEGAN, AND WOODSTOCK.
Effective August 9, 2026 at 10:46 AM ET · Expires August 9, 2026 at 3:00 PM ET
Event Details
Event Type
Severe Thunderstorm Watch
Severity
severe
Issued By
NWS Chicago IL
Expires
August 9, 2026 at 3:00 PM ET
Last Checked
1 minute ago
Also In Effect For
This same Severe Thunderstorm Watch also covers:
Other Active Alerts in Illinois
Severe Thunderstorm Watch
Severe Thunderstorm Warning
Severe Thunderstorm Watch
Get Severe Thunderstorm Watch Alerts for McHenry County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Severe Thunderstorm Watch mean for McHenry County, Illinois?
Conditions favor the development of severe thunderstorms in and near the watch area.
Is this Severe Thunderstorm Watch currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire August 9, 2026 at 3:00 PM ET.
How do I get notified about Severe Thunderstorm Watch alerts for McHenry County?
Download StormCast free on Google Play and set McHenry County, Illinois as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Severe Thunderstorm Watch is also in effect for Lake County.