St. Clair County, Illinois: tornado and severe weather warnings
Nothing is in effect for St. Clair County as of 5:08 PM CDT: no warnings, watches or advisories. This page checks the National Weather Service every minute.
Open the live map on St. Clair 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 St. Clair County. Tap your own street on it for times that apply to you.
The last 12 months in St. Clair County
- 8 tornado warnings
- 14 severe thunderstorm warnings
- 4 flash flood warnings
- 6 tornado watches
- 6 severe thunderstorm watches
The most recent tornado warning that included St. Clair County was issued Jun 21, 2026 by the Weather Service office in St. Louis, MO.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Aug 16, 2026 | 9:17 PM CDT | Severe thunderstorm warning | LSX | text |
| Jul 10, 2026 | 9:58 PM CDT | Flash flood warning | LSX | text |
| Jul 10, 2026 | 9:30 PM CDT | Flash flood warning | LSX | text |
| Jul 10, 2026 | 8:40 PM CDT | Severe thunderstorm warning | LSX | text |
| Jul 4, 2026 | 4:42 PM CDT | Severe thunderstorm warning | LSX | text |
| Jun 21, 2026 | 5:02 PM CDT | Tornado warning | LSX | text |
| May 18, 2026 | 5:06 PM CDT | Flash flood warning | LSX | text |
| May 18, 2026 | 2:54 PM CDT | Flash flood warning | LSX | text |
| May 16, 2026 | 3:20 PM CDT | Severe thunderstorm warning | LSX | text |
| May 4, 2026 | 2:48 PM CDT | Severe thunderstorm warning | LSX | text |
| Apr 27, 2026 | 7:56 PM CDT | Severe thunderstorm warning | LSX | text |
| Apr 27, 2026 | 7:52 PM CDT | Tornado warning | LSX | text |
A warning counts here if the Weather Service listed St. Clair County in it, even if the warned area covered only part of the county.
Nearby
- Monroe County, IL
- St. Louis city, MO
- Madison County, IL
- Clinton County, IL
- Washington County, IL
- Randolph County, IL
- St. Louis County, MO
- Jefferson County, MO
- 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.