Severe Thunderstorm Warning — Grundy 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 10 at 12:36AM CDT until August 10 at 1:45AM CDT by NWS Chicago IL
SVRLOT The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Livingston County in central Illinois... Southern Grundy County in northeastern Illinois... Southwestern Kankakee County in northeastern Illinois... North central Ford County in east central Illinois... Northwestern Iroquois County in east central Illinois... * Until 145 AM CDT. * At 1236 AM CDT, severe thunderstorms were located along a line extending from 6 miles west of Herscher to near Cornell, moving southeast at 25 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Streator, Pontiac, Dwight, Herscher, Clifton, Limestone, Gardner, Flanagan, Chebanse, Odell, South Streator, Ashkum, Cullom, Cornell, Saunemin, Essex, South Wilmington, Bonfield, Buckingham, Cabery, Kempton, Long Point, Campus, Reddick, and Emington.
Effective August 10, 2026 at 1:36 AM ET · Expires August 10, 2026 at 2:45 AM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Chicago IL
Expires
August 10, 2026 at 2:45 AM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Also In Effect For
This same Severe Thunderstorm Warning also covers:
Other Active Alerts in Illinois
Flood Advisory
Flood Advisory
Flood Advisory
Severe Thunderstorm Watch
Flash Flood Warning
Flood Advisory
Get Severe Thunderstorm Warning Alerts for Grundy County
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Frequently Asked Questions
What does a Severe Thunderstorm Warning mean for Grundy 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 minutes ago). It's set to expire August 10, 2026 at 2:45 AM ET.
How do I get notified about Severe Thunderstorm 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 Severe Thunderstorm Warning is also in effect for Ford County, Iroquois County, Kankakee County, Livingston County.