St. Clair County weather alerts
There are no active weather alerts for St. Clair County, MO right now.
Since 2016 the National Weather Service has issued about 1,045 alerts that included St. Clair County, roughly 105 a year. The most common is the severe thunderstorm warning (183 from 2016 to 2025). The last tornado warning was issued on July 10, 2026. 24 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include St. Clair County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Cedar County, Benton County, Bates County, Henry County.
St. Clair County alert history
Alert events that included St. Clair County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 183 | 40 | September 7, 2026 |
| Severe Thunderstorm Watch | 95 | 12 | July 4, 2026 |
| Wind Advisory | 81 | 1 | March 15, 2026 |
| Heat Advisory | 78 | 8 | September 14, 2026 |
| Dense Fog Advisory | 77 | 4 | August 20, 2026 |
| Flood Warning | 75 | 13 | June 23, 2026 |
| Winter Weather Advisory | 69 | 0 | December 1, 2025 |
| Red Flag Warning | 61 | 1 | February 19, 2026 |
| Flood Watch | 52 | 9 | October 14, 2026 |
| Freeze Warning | 43 | 1 | March 28, 2026 |
| Flood Advisory | 39 | 14 | June 21, 2026 |
| Flash Flood Warning | 31 | 5 | July 9, 2026 |
| Tornado Watch | 29 | 9 | June 17, 2026 |
| Frost Advisory | 25 | 3 | November 8, 2026 |
| Fire Weather Watch | 17 | 0 | March 17, 2025 |
| Cold Weather Advisory | 15 | 1 | January 24, 2026 |
| Tornado Warning | 14 | 12 | July 10, 2026 |
| Freeze Watch | 13 | 0 | November 2, 2025 |
| Extreme Heat Warning | 11 | 3 | September 4, 2026 |
| Winter Storm Warning | 11 | 1 | January 24, 2026 |
| Winter Storm Watch | 10 | 1 | January 24, 2026 |
| High Wind Warning | 6 | 0 | April 30, 2025 |
| Extreme Cold Warning | 3 | 1 | January 25, 2026 |
| Ice Storm Warning | 2 | 0 | February 6, 2019 |
| Extreme Heat Watch | 2 | 3 | September 1, 2026 |
| Extreme Cold Watch | 2 | 0 | December 22, 2022 |
| High Wind Watch | 1 | 0 | March 14, 2025 |
Tornado history in St. Clair County
24 tornadoes have been recorded in St. Clair County since 1950, killing 1 people and injuring 12. That ranks 57 of 115 counties in Missouri. The most recent was on May 19, 2025 (rated EF1).
Strongest tornadoes in St. Clair County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 4, 1999 | F3 | St. Clair County | 3 mi | 200 yd | 0 | 1 |
| March 12, 2006 | F2 | Vernon County | 38 mi | 300 yd | 1 | 7 |
| May 26, 2004 | F2 | St. Clair County | 12 mi | 200 yd | 0 | 1 |
| April 20, 1973 | F2 | St. Clair County | 5.7 mi | 17 yd | 0 | 0 |
| April 20, 1973 | F1 | St. Clair County | 13 mi | 17 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 19, 2025 | EF1 | St. Clair County | 4.6 mi | 50 yd | 0 | 0 |
| May 6, 2024 | EF0 | St. Clair County | 1 mi | 100 yd | 0 | 0 |
| April 26, 2024 | EF0 | St. Clair County | 0.2 mi | 50 yd | 0 | 0 |
| June 26, 2018 | EF1 | St. Clair County | 2.5 mi | 200 yd | 0 | 0 |
| May 24, 2015 | EF1 | St. Clair County | 5 mi | 200 yd | 0 | 0 |
About St. Clair County
- Population: 9,848 (2024 estimate)
- State: Missouri
- NOAA Weather Radio SAME code: 029185 (how to use it)