Tornado Warning — Grundy County, Illinois
A tornado has been sighted or indicated by weather radar. Take shelter immediately in a sturdy building, away from windows.
Current Status
🌪️ Active: Tornado Warning
Tornado Warning issued August 10 at 12:13AM CDT until August 10 at 12:30AM CDT by NWS Chicago IL
At 1212 AM CDT, a severe thunderstorm with a history of producing tornadoes was located near Seneca, or 10 miles southeast of Marseilles, moving east at 15 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. This tornadic thunderstorm will remain over mainly rural areas of southeastern La Salle and southwestern Grundy Counties, including the following locations... Kinsman, Ransom, and Verona.
Effective August 10, 2026 at 1:13 AM ET · Expires August 10, 2026 at 1:30 AM ET
Event Details
Event Type
Tornado Warning
Severity
extreme
Issued By
NWS Chicago IL
Expires
August 10, 2026 at 1:30 AM ET
Last Checked
2 hours ago
What To Do
📋 Official NWS Guidance
TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.
Also In Effect For
This same Tornado Warning also covers:
Other Active Alerts in Illinois
Flood Advisory
Flash Flood Warning
Flood Advisory
Flash Flood Warning
Severe Thunderstorm Watch
Flash Flood Warning
Get Tornado Warning Alerts for Grundy County
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Frequently Asked Questions
What does a Tornado Warning mean for Grundy County, Illinois?
A tornado has been sighted or indicated by weather radar. Take shelter immediately in a sturdy building, away from windows.
Is this Tornado Warning currently active?
Yes — this alert is active as of our last check (2 hours ago). It's set to expire August 10, 2026 at 1:30 AM ET.
How do I get notified about Tornado Warning alerts for Grundy County?
Download StormCast free on Google Play and set Grundy 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 Tornado Warning is also in effect for La Salle County.