Severe Thunderstorm Warning for DeKalb, Lee, Ogle Counties IL
If you are in immediate danger, call emergency services now.
For real-time, official alerts and instructions for your exact location, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia) as applicable. This article is a data summary, not a substitute for the issuing agency's live warning.
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Chicago issues Severe Thunderstorm Warning until 6:00 PM CDT for DeKalb, Lee, and Ogle counties in north central Illinois with 60 mph winds and quarter-size hail.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- North Central Illinois
- Issued
- August 21, 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 August 21, 2026 at 4:55 PM CDT until August 21, 2026 at 6:00 PM CDT. Alert type code: SVR.
Affected Areas
Northeastern Lee County, Southeastern Ogle County, and Central De Kalb County in north central Illinois. Locations impacted include DeKalb, Rochelle, Shabbona, Cortland, Hinckley, Waterman, Hillcrest, Maple Park, Malta, Creston, Lee, and Steward.
What You Should Do
Move to an interior room on the lowest floor of a building. Remain alert for a possible tornado. If you spot a tornado, go at once into the basement or small central room in a sturdy structure. Do not drive your vehicle through flooded roadways.
Expected Conditions
At 4:55 PM CDT, a severe thunderstorm was located near Rochelle moving east southeast at 25 mph. Hazards include 60 mph wind gusts and quarter size hail (1.00 inch). Hail damage to vehicles expected. Wind damage to roofs, siding, and trees possible. Torrential rainfall may lead to flash flooding. Tornado possible.
Timeline
Alert effective August 21, 2026 at 4:55 PM CDT and expires August 21, 2026 at 6:00 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Frequently Asked Questions
Common questions about this NWS weather alert.