Williamson County, Texas weather alerts
No watches, warnings or advisories are in force for Williamson County.
Checked Sun, Sep 20, 2026, 9:22 AM CDT. Times are Central Daylight Time.
Radar
Reflectivity now over Williamson County, Texas. Open it to see warnings and watches on the map.























Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
Nothing is in force for Williamson 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 Williamson County
In the past year the National Weather Service issued 97 alerts for Williamson County, including 17 severe thunderstorm warnings, 7 flash flood warnings, 4 red flag warnings and 3 extreme heat warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 17 | Sep 11, 2026 |
| Flash Flood Warning | 7 | Jun 15, 2026 |
| Red Flag Warning | 4 | Mar 15, 2026 |
| Extreme Heat Warning | 3 | Aug 22, 2026 |
| Flood Warning | 2 | Jun 6, 2026 |
| Freeze Warning | 2 | Dec 2, 2025 |
| Extreme Cold Warning | 1 | Jan 24, 2026 |
| Ice Storm Warning | 1 | Jan 24, 2026 |
| Winter Storm Warning | 1 | Jan 24, 2026 |
| Flood Watch | 9 | Jul 13, 2026 |
| Severe Thunderstorm Watch | 6 | May 19, 2026 |
| Fire Weather Watch | 3 | Mar 15, 2026 |
| Extreme Cold Watch | 1 | Jan 24, 2026 |
| Winter Storm Watch | 1 | Jan 24, 2026 |
| Flood Advisory | 20 | Jun 20, 2026 |
| Heat Advisory | 9 | Sep 15, 2026 |
| Dense Fog Advisory | 5 | Apr 22, 2026 |
| Wind Advisory | 4 | Mar 15, 2026 |
| Cold Weather Advisory | 1 | Jan 31, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Extreme Heat Warning
- Extreme Heat Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Warning
- Flash Flood Warning
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Red Flag Warning
- Extreme Cold Warning
- Ice Storm Warning
- Winter Storm Warning
- Red Flag Warning
- Freeze Warning
- Red Flag Warning
- Freeze Warning
- Red Flag Warning
Every alert, most recent first
- Heat Advisory
- Heat Advisory
- Heat Advisory
- Heat Advisory
- Severe Thunderstorm Warning
- Heat Advisory
- Extreme Heat Warning
- Heat Advisory
- Heat Advisory
- Heat Advisory
- Extreme Heat Warning
- Flood Watch
- Flood Advisory
- Heat Advisory
- Extreme Heat Warning
- Flood Advisory
- Flood Advisory
- Flash Flood Warning
- Flash Flood Warning
- Flood Advisory
- Flood Watch
- Flood Advisory
- Flood Advisory
- Flood Warning
- Flood Advisory
- Flash Flood Warning
- Flood Advisory
- Flood Advisory
- Flood Watch
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Watch
- Flood Advisory
- Flood Watch
- Flood Advisory
- Severe Thunderstorm Warning
- Flood Advisory
- Flood Advisory
The 40 most recent of 97.
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 Williamson 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.