Williamson County weather alerts
There are no active weather alerts for Williamson County, TX right now.
Since 2016 the National Weather Service has issued about 974 alerts that included Williamson County, roughly 97 a year. The most common is the flood advisory (181 from 2016 to 2025). The last tornado warning was issued on May 27, 2025. 73 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 Williamson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Bell County, Burnet County, Travis County, Bastrop County.
Williamson County alert history
Alert events that included Williamson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Flood Advisory | 181 | 21 | October 2, 2026 |
| Severe Thunderstorm Warning | 179 | 17 | September 11, 2026 |
| Dense Fog Advisory | 108 | 4 | October 31, 2026 |
| Severe Thunderstorm Watch | 82 | 5 | May 19, 2026 |
| Heat Advisory | 69 | 9 | September 15, 2026 |
| Wind Advisory | 57 | 2 | October 16, 2026 |
| Flash Flood Warning | 49 | 7 | June 15, 2026 |
| Red Flag Warning | 42 | 2 | March 15, 2026 |
| Flood Watch | 35 | 8 | October 1, 2026 |
| Extreme Heat Warning | 34 | 3 | August 23, 2026 |
| Tornado Watch | 24 | 0 | May 26, 2025 |
| Tornado Warning | 24 | 0 | May 27, 2025 |
| Freeze Warning | 19 | 0 | December 2, 2025 |
| Fire Weather Watch | 16 | 1 | March 15, 2026 |
| Flood Warning | 12 | 2 | June 6, 2026 |
| Winter Weather Advisory | 11 | 0 | January 14, 2024 |
| Winter Storm Warning | 9 | 1 | January 24, 2026 |
| Cold Weather Advisory | 9 | 1 | January 31, 2026 |
| Winter Storm Watch | 6 | 1 | January 24, 2026 |
| Extreme Cold Warning | 5 | 1 | January 25, 2026 |
| Extreme Cold Watch | 2 | 1 | January 25, 2026 |
| High Wind Warning | 1 | 0 | May 29, 2024 |
| Ice Storm Warning | 0 | 1 | January 24, 2026 |
Tornado history in Williamson County
73 tornadoes have been recorded in Williamson County since 1950, killing 29 people and injuring 97. That ranks 25 of 254 counties in Texas. The most recent was on October 24, 2022 (rated EF1).
Strongest tornadoes in Williamson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 27, 1997 | F5 | Williamson County | 5.1 mi | 650 yd | 27 | 12 |
| April 7, 1980 | F3 | Williamson County | 31.7 mi | 100 yd | 1 | 5 |
| May 17, 1989 | F3 | Williamson County | 3 mi | 1,700 yd | 1 | 28 |
| April 30, 1954 | F3 | Travis County | 139.9 mi | 880 yd | 0 | 6 |
| April 12, 2022 | EF3 | Williamson County | 16.6 mi | 770 yd | 0 | 23 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| October 24, 2022 | EF1 | Williamson County | 3.9 mi | 150 yd | 0 | 0 |
| April 12, 2022 | EF3 | Williamson County | 16.6 mi | 770 yd | 0 | 23 |
| March 21, 2022 | EF2 | Travis County | 34.6 mi | 600 yd | 0 | 0 |
| March 21, 2022 | EF1 | Williamson County | 9.3 mi | 300 yd | 0 | 0 |
| June 9, 2019 | EF0 | Williamson County | 0.7 mi | 50 yd | 0 | 0 |
About Williamson County
- Population: 727,480 (2024 estimate)
- State: Texas
- NOAA Weather Radio SAME code: 048491 (how to use it)
- Cities: Round Rock, Georgetown