Grainger County weather alerts
There are no active weather alerts for Grainger County, TN right now.
Since 2016 the National Weather Service has issued about 748 alerts that included Grainger County, roughly 75 a year. The most common is the severe thunderstorm warning (214 from 2016 to 2025). The last tornado warning was issued on February 7, 2025. 4 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 Grainger County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Hancock County, Hawkins County, Jefferson County, Union County.
Grainger County alert history
Alert events that included Grainger County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 214 | 16 | September 18, 2026 |
| Flood Advisory | 101 | 13 | August 17, 2026 |
| Dense Fog Advisory | 59 | 6 | November 6, 2026 |
| Wind Advisory | 51 | 2 | October 10, 2026 |
| Flood Warning | 51 | 0 | March 16, 2025 |
| Freeze Warning | 48 | 0 | November 2, 2023 |
| Flood Watch | 39 | 8 | August 12, 2026 |
| Frost Advisory | 31 | 1 | May 3, 2026 |
| Severe Thunderstorm Watch | 30 | 4 | August 17, 2026 |
| Winter Weather Advisory | 28 | 0 | November 10, 2025 |
| Freeze Watch | 21 | 0 | November 1, 2023 |
| Flash Flood Warning | 19 | 3 | July 22, 2026 |
| Tornado Watch | 16 | 0 | May 20, 2025 |
| Winter Storm Watch | 7 | 2 | January 30, 2026 |
| Winter Storm Warning | 7 | 2 | January 30, 2026 |
| Cold Weather Advisory | 6 | 4 | February 2, 2026 |
| Tornado Warning | 5 | 0 | February 7, 2025 |
| Heat Advisory | 5 | 2 | September 2, 2026 |
| Red Flag Warning | 3 | 0 | March 1, 2025 |
| Extreme Cold Watch | 2 | 0 | January 20, 2025 |
| High Wind Watch | 2 | 0 | September 27, 2024 |
| High Wind Warning | 2 | 0 | September 27, 2024 |
| Extreme Cold Warning | 1 | 0 | December 23, 2022 |
Tornado history in Grainger County
4 tornadoes have been recorded in Grainger County since 1950, injuring 2 people. That ranks 82 of 95 counties in Tennessee. The most recent was on February 6, 2025 (rated EF1).
Strongest tornadoes in Grainger County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 8, 2009 | EF1 | Grainger County | 9.5 mi | 100 yd | 0 | 0 |
| February 6, 2025 | EF1 | Grainger County | 3.5 mi | 700 yd | 0 | 0 |
| May 10, 1973 | F1 | Grainger County | 0.1 mi | 10 yd | 0 | 0 |
| October 1, 1977 | F0 | Grainger County | 2 mi | 33 yd | 0 | 2 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| February 6, 2025 | EF1 | Grainger County | 3.5 mi | 700 yd | 0 | 0 |
| May 8, 2009 | EF1 | Grainger County | 9.5 mi | 100 yd | 0 | 0 |
| October 1, 1977 | F0 | Grainger County | 2 mi | 33 yd | 0 | 2 |
| May 10, 1973 | F1 | Grainger County | 0.1 mi | 10 yd | 0 | 0 |
About Grainger County
- Population: 25,073 (2024 estimate)
- State: Tennessee
- NOAA Weather Radio SAME code: 047057 (how to use it)