Severe Thunderstorm Warning — Winnebago County, Illinois
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Current Status
⛈️ Active: Severe Thunderstorm Warning
Severe Thunderstorm Warning issued August 11 at 10:08AM CDT until August 11 at 10:15AM CDT by NWS Chicago IL
The storms which prompted the warning have moved out of the area. Therefore, the warning will be allowed to expire. A Severe Thunderstorm Watch remains in effect until 200 PM CDT for north central Illinois.
Effective August 11, 2026 at 11:08 AM ET · Expires August 11, 2026 at 11:18 AM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Chicago IL
Expires
August 11, 2026 at 11:18 AM ET
Last Checked
2 hours ago
Also In Effect For
This same Severe Thunderstorm Warning also covers:
Other Active Alerts in Illinois
Flood Advisory
Severe Thunderstorm Watch
Flood Advisory
Severe Thunderstorm Watch
Flood Advisory
Severe Thunderstorm Watch
Get Severe Thunderstorm Warning Alerts for Winnebago 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 Warning mean for Winnebago County, Illinois?
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Is this Severe Thunderstorm Warning currently active?
Yes — this alert is active as of our last check (2 hours ago). It's set to expire August 11, 2026 at 11:18 AM ET.
How do I get notified about Severe Thunderstorm Warning alerts for Winnebago County?
Download StormCast free on Google Play and set Winnebago 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 Warning is also in effect for Ogle County.