Saint Louis County, Missouri weather alerts
No watches, warnings or advisories are in force for Saint Louis County.
Checked Sun, Sep 20, 2026, 8:01 PM CDT. Times are Central Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Saint Louis County, Missouri. Open it for the live map, where it pans and zooms.























Open the live map with warnings and watches
Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
Nothing is in force for Saint Louis County right now. Its warnings come from the National Weather Service and appear here within a minute of being issued; every one of the past year is below.
The past year in Saint Louis County
In the past year the National Weather Service issued 117 alerts for Saint Louis County, including 20 severe thunderstorm warnings, 11 flood warnings, 6 flash flood warnings and 5 tornado warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 20 | Sep 9, 2026 |
| Flood Warning | 11 | Jun 16, 2026 |
| Flash Flood Warning | 6 | Jul 4, 2026 |
| Tornado Warning | 5 | Apr 27, 2026 |
| Extreme Heat Warning | 4 | Sep 3, 2026 |
| Extreme Cold Warning | 1 | Jan 26, 2026 |
| Red Flag Warning | 1 | Feb 27, 2026 |
| Winter Storm Warning | 1 | Jan 24, 2026 |
| Flood Watch | 6 | Aug 5, 2026 |
| Severe Thunderstorm Watch | 6 | Jul 10, 2026 |
| Tornado Watch | 5 | Jun 17, 2026 |
| Extreme Heat Watch | 4 | Aug 31, 2026 |
| Winter Storm Watch | 2 | Jan 24, 2026 |
| Freeze Watch | 1 | Nov 2, 2025 |
| Flood Advisory | 15 | Sep 10, 2026 |
| Dense Fog Advisory | 9 | May 9, 2026 |
| Heat Advisory | 6 | Sep 15, 2026 |
| Wind Advisory | 6 | Jun 17, 2026 |
| Cold Weather Advisory | 3 | Jan 26, 2026 |
| Winter Weather Advisory | 3 | Mar 1, 2026 |
| Frost Advisory | 2 | Mar 28, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Red Flag Warning
- Extreme Cold Warning
- Winter Storm Warning
Every alert, most recent first
- Heat Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Extreme Heat Watch
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Watch
- Extreme Heat Warning
- Flood Watch
- Flood Advisory
- Heat Advisory
- Heat Advisory
- Extreme Heat Watch
- Extreme Heat Warning
- Flood Advisory
- Heat Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Flood Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Watch
- Extreme Heat Watch
- Extreme Heat Warning
- Flood Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Flood Watch
- Flood Advisory
- Flood Watch
- Tornado Watch
- Wind Advisory
- Flood Warning
- Flood Warning
The 40 most recent of 117.
From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.
Nearby
The counties around Saint Louis County, with what is in force in each.
What this means
- Warning
- The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
- Watch
- Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
- Advisory
- A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
- Statement
- Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.