St. Charles County weather alerts
There are no active weather alerts for St. Charles County, MO right now.
Since 2016 the National Weather Service has issued about 994 alerts that included St. Charles County, roughly 99 a year. The most common is the severe thunderstorm warning (256 from 2016 to 2025). The last tornado warning was issued on April 27, 2026. 45 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. Charles County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Warren County, Franklin County, Jersey County, Madison County.
St. Charles County alert history
Alert events that included St. Charles County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 256 | 27 | September 17, 2026 |
| Flood Warning | 115 | 7 | June 17, 2026 |
| Severe Thunderstorm Watch | 75 | 6 | July 10, 2026 |
| Flood Advisory | 67 | 8 | September 17, 2026 |
| Winter Weather Advisory | 63 | 1 | March 2, 2026 |
| Dense Fog Advisory | 60 | 3 | May 9, 2026 |
| Flood Watch | 44 | 6 | August 6, 2026 |
| Heat Advisory | 42 | 6 | September 15, 2026 |
| Wind Advisory | 42 | 3 | June 17, 2026 |
| Flash Flood Warning | 33 | 5 | August 6, 2026 |
| Tornado Watch | 33 | 5 | June 17, 2026 |
| Tornado Warning | 32 | 4 | April 27, 2026 |
| Freeze Warning | 23 | 2 | November 7, 2026 |
| Frost Advisory | 18 | 1 | October 18, 2026 |
| Red Flag Warning | 18 | 1 | February 27, 2026 |
| Extreme Heat Warning | 14 | 4 | September 3, 2026 |
| Cold Weather Advisory | 12 | 2 | January 26, 2026 |
| Winter Storm Watch | 11 | 1 | January 24, 2026 |
| Winter Storm Warning | 10 | 1 | January 24, 2026 |
| Freeze Watch | 7 | 0 | November 2, 2025 |
| Extreme Heat Watch | 6 | 4 | August 31, 2026 |
| Fire Weather Watch | 3 | 0 | October 17, 2020 |
| High Wind Warning | 3 | 0 | March 5, 2025 |
| Extreme Cold Warning | 3 | 1 | January 26, 2026 |
| Extreme Cold Watch | 2 | 0 | December 22, 2022 |
| Ice Storm Warning | 1 | 0 | January 13, 2017 |
| High Wind Watch | 1 | 0 | March 14, 2019 |
Tornado history in St. Charles County
45 tornadoes have been recorded in St. Charles County since 1950, killing 2 people and injuring 108. That ranks 11 of 115 counties in Missouri. The most recent was on March 14, 2025 (rated EF2).
Strongest tornadoes in St. Charles County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| December 10, 2021 | EF3 | St. Charles County | 27.3 mi | 150 yd | 1 | 2 |
| December 10, 2021 | EF3 | St. Charles County | 27.3 mi | 150 yd | 1 | 2 |
| May 31, 2013 | EF3 | St. Charles County | 31.7 mi | 1,760 yd | 0 | 8 |
| October 24, 1967 | F3 | St. Louis County | 21.8 mi | 100 yd | 0 | 2 |
| March 25, 1954 | F3 | St. Charles County | 21.6 mi | 20 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 14, 2025 | EF2 | St. Charles County | 11 mi | 1,320 yd | 0 | 0 |
| November 4, 2024 | EF0 | St. Charles County | 6.1 mi | 75 yd | 0 | 0 |
| May 7, 2024 | EF0 | St. Charles County | 2.2 mi | 50 yd | 0 | 0 |
| December 10, 2021 | EF3 | St. Charles County | 27.3 mi | 150 yd | 1 | 2 |
| December 10, 2021 | EF3 | St. Charles County | 27.3 mi | 150 yd | 1 | 2 |
About St. Charles County
- Population: 423,726 (2024 estimate)
- State: Missouri
- NOAA Weather Radio SAME code: 029183 (how to use it)