Grayson County weather alerts
There are no active weather alerts for Grayson County, TX right now.
Since 2016 the National Weather Service has issued about 922 alerts that included Grayson County, roughly 92 a year. The most common is the severe thunderstorm warning (255 from 2016 to 2025). The last tornado warning was issued on June 9, 2025. 71 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 Grayson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Collin County, Cooke County, Bryan County, Love County.
Grayson County alert history
Alert events that included Grayson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 255 | 18 | September 28, 2026 |
| Severe Thunderstorm Watch | 100 | 6 | June 23, 2026 |
| Flood Advisory | 93 | 7 | September 21, 2026 |
| Wind Advisory | 82 | 4 | October 16, 2026 |
| Dense Fog Advisory | 78 | 2 | November 1, 2026 |
| Heat Advisory | 62 | 12 | September 12, 2026 |
| Tornado Watch | 47 | 6 | April 28, 2026 |
| Flood Watch | 44 | 2 | September 30, 2026 |
| Flash Flood Warning | 32 | 7 | September 20, 2026 |
| Freeze Warning | 19 | 2 | March 17, 2026 |
| Tornado Warning | 19 | 0 | June 9, 2025 |
| Winter Weather Advisory | 18 | 0 | February 18, 2025 |
| Extreme Heat Warning | 17 | 3 | August 23, 2026 |
| Freeze Watch | 10 | 0 | November 10, 2025 |
| Flood Warning | 9 | 2 | September 21, 2026 |
| Cold Weather Advisory | 6 | 1 | January 31, 2026 |
| Winter Storm Warning | 6 | 1 | January 24, 2026 |
| Winter Storm Watch | 5 | 1 | January 23, 2026 |
| Frost Advisory | 4 | 0 | November 2, 2020 |
| Red Flag Warning | 4 | 0 | March 14, 2025 |
| Fire Weather Watch | 3 | 1 | February 19, 2026 |
| Extreme Heat Watch | 2 | 0 | August 13, 2019 |
| Extreme Cold Warning | 2 | 1 | January 25, 2026 |
| Extreme Cold Watch | 2 | 1 | January 25, 2026 |
| Ice Storm Warning | 1 | 0 | February 1, 2023 |
| High Wind Watch | 1 | 0 | March 14, 2025 |
| High Wind Warning | 1 | 0 | March 14, 2025 |
Tornado history in Grayson County
71 tornadoes have been recorded in Grayson County since 1950, killing 4 people and injuring 63. That ranks 28 of 254 counties in Texas. The most recent was on June 8, 2025 (rated EF1).
Strongest tornadoes in Grayson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 9, 2006 | F3 | Collin County | 9.3 mi | 300 yd | 3 | 10 |
| April 6, 1955 | F3 | Grayson County | 30.2 mi | 67 yd | 1 | 27 |
| April 2, 1957 | F3 | Collin County | 10.7 mi | 33 yd | 0 | 4 |
| March 10, 1973 | F3 | Grayson County | 6.8 mi | 100 yd | 0 | 3 |
| March 12, 1971 | F3 | Grayson County | 5.2 mi | 440 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 8, 2025 | EF1 | Grayson County | 4 mi | 400 yd | 0 | 0 |
| April 26, 2016 | EF0 | Grayson County | 6 mi | 75 yd | 0 | 0 |
| April 26, 2016 | EF0 | Grayson County | 2.4 mi | 150 yd | 0 | 5 |
| April 26, 2016 | EF0 | Grayson County | 0.2 mi | 80 yd | 0 | 0 |
| May 25, 2015 | EF0 | Grayson County | 1.7 mi | 30 yd | 0 | 0 |
About Grayson County
- Population: 150,532 (2024 estimate)
- State: Texas
- NOAA Weather Radio SAME code: 048181 (how to use it)