Severe Thunderstorm Warning Issued for Grundy, La Salle, Livingston Counties in Illinois
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The National Weather Service in Chicago has issued a Severe Thunderstorm Warning for parts of northern and central Illinois until 12:45 AM CDT on August 10, 2026.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northern and Central Illinois
- Issued
- August 10, 2026
- Issuing authority
- NWS Chicago IL
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Severe Thunderstorm Warning issued by NWS Chicago IL. Effective from 11:35 PM CDT August 9, 2026, until 12:45 AM CDT August 10, 2026.
Affected Areas
Northern Livingston County in central Illinois, Southeastern La Salle County in north central Illinois, and Southern Grundy County in northeastern Illinois. Locations impacted include Streator, Coal City, Marseilles, Dwight, Diamond, Seneca, Gardner, Odell, Mazon, South Streator, Braceville, Cullom, Cornell, Saunemin, South Wilmington, Godley, Ransom, Kangley, Long Point, Verona, Campus, Reddick, Emington, East Brooklyn, and Kinsman.
What You Should Do
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.
Expected Conditions
At 11:34 PM CDT, severe thunderstorms were located along a line extending from near Seneca to near South Streator, moving east at 25 mph. Hazard includes 70 mph wind gusts and nickel size hail (0.88 inch). Source is radar indicated. Impact includes considerable tree damage, with damage likely to mobile homes, roofs, and outbuildings.
Timeline
The warning is in effect from 11:35 PM CDT August 9, 2026, until 12:45 AM CDT August 10, 2026.
Original source: NOAA Official Notice ↗
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