Williamson County, Illinois: tornado and severe weather warnings
Nothing is in effect for Williamson County as of 4:45 PM CDT: no warnings, watches or advisories. This page checks the National Weather Service every minute.
Open the live map on Williamson County Get a message when a warning reaches your address
The map shows radar, every warning shape, and the path and arrival time of each storm cell headed toward the center of Williamson County. Tap your own street on it for times that apply to you.
The last 12 months in Williamson County
- 2 tornado warnings
- 14 severe thunderstorm warnings
- 2 flash flood warnings
- 7 tornado watches
- 7 severe thunderstorm watches
The most recent tornado warning that included Williamson County was issued Mar 15, 2026 by the Weather Service office in Paducah, KY.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Sep 5, 2026 | 6:56 PM CDT | Severe thunderstorm warning | PAH | text |
| Jul 10, 2026 | 10:40 PM CDT | Flash flood warning | PAH | text |
| Jul 10, 2026 | 7:53 PM CDT | Severe thunderstorm warning | PAH | text |
| Jul 10, 2026 | 7:20 PM CDT | Severe thunderstorm warning | PAH | text |
| Jul 10, 2026 | 12:31 AM CDT | Flash flood warning | PAH | text |
| Apr 27, 2026 | 9:52 PM CDT | Severe thunderstorm warning | PAH | text |
| Apr 27, 2026 | 9:16 AM CDT | Severe thunderstorm warning | PAH | text |
| Apr 27, 2026 | 8:44 AM CDT | Severe thunderstorm warning | PAH | text |
| Apr 27, 2026 | 8:21 AM CDT | Severe thunderstorm warning | PAH | text |
| Apr 27, 2026 | 7:32 AM CDT | Severe thunderstorm warning | PAH | text |
| Apr 27, 2026 | 6:53 AM CDT | Severe thunderstorm warning | PAH | text |
| Mar 15, 2026 | 7:15 PM CDT | Tornado warning | PAH | text |
A warning counts here if the Weather Service listed Williamson County in it, even if the warned area covered only part of the county.
Nearby
- Franklin County, IL
- Johnson County, IL
- Saline County, IL
- Union County, IL
- Jackson County, IL
- Pope County, IL
- Hamilton County, IL
- Perry County, IL
- All of Illinois
What the alerts mean
Alerts come from the National Weather Service and refresh every minute. Past warnings come from the Iowa Environmental Mesonet's archive of Weather Service products. During a warning, also listen to local radio, TV or a weather radio.