Knox County weather alerts
There are no active weather alerts for Knox County, TN right now.
Since 2016 the National Weather Service has issued about 925 alerts that included Knox County, roughly 93 a year. The most common is the severe thunderstorm warning (289 from 2016 to 2025). The last tornado warning was issued on September 4, 2025. 17 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 Knox County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Loudon County, Grainger County, Sevier County, Anderson County.
Knox County alert history
Alert events that included Knox County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 289 | 18 | September 6, 2026 |
| Flood Advisory | 191 | 37 | October 3, 2026 |
| Dense Fog Advisory | 58 | 7 | November 6, 2026 |
| Wind Advisory | 54 | 2 | October 10, 2026 |
| Flash Flood Warning | 45 | 16 | September 24, 2026 |
| Freeze Warning | 44 | 0 | November 2, 2023 |
| Flood Watch | 41 | 8 | August 12, 2026 |
| Severe Thunderstorm Watch | 35 | 4 | August 17, 2026 |
| Frost Advisory | 27 | 0 | April 7, 2024 |
| Winter Weather Advisory | 24 | 0 | November 10, 2025 |
| Flood Warning | 24 | 0 | March 16, 2025 |
| Tornado Watch | 23 | 0 | May 20, 2025 |
| Freeze Watch | 19 | 0 | November 1, 2023 |
| Heat Advisory | 11 | 4 | September 3, 2026 |
| Tornado Warning | 10 | 0 | September 4, 2025 |
| Winter Storm Warning | 6 | 1 | January 30, 2026 |
| Winter Storm Watch | 6 | 2 | January 30, 2026 |
| Cold Weather Advisory | 6 | 4 | February 2, 2026 |
| Red Flag Warning | 4 | 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 |
| Fire Weather Watch | 1 | 0 | April 20, 2023 |
| Ice Storm Warning | 0 | 1 | January 24, 2026 |
Tornado history in Knox County
17 tornadoes have been recorded in Knox County since 1950, killing 2 people and injuring 32. That ranks 43 of 95 counties in Tennessee. The most recent was on August 7, 2023 (rated EF2).
Strongest tornadoes in Knox County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| February 21, 1993 | F3 | Anderson County | 16 mi | 150 yd | 0 | 3 |
| April 15, 1965 | F2 | Knox County | 7.4 mi | 200 yd | 0 | 6 |
| August 7, 2023 | EF2 | Knox County | 3.7 mi | 200 yd | 0 | 0 |
| May 2, 1953 | F2 | Anderson County | 0.8 mi | 100 yd | 0 | 0 |
| April 3, 1974 | F1 | Knox County | 1 mi | 150 yd | 2 | 21 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 7, 2023 | EF2 | Knox County | 3.7 mi | 200 yd | 0 | 0 |
| March 2, 2012 | EF0 | Knox County | 2.1 mi | 100 yd | 0 | 0 |
| March 2, 2012 | EF0 | Knox County | 0.3 mi | 70 yd | 0 | 0 |
| June 23, 2011 | EF0 | Knox County | 1 mi | 100 yd | 0 | 0 |
| April 27, 2011 | EF0 | Knox County | 1 mi | 50 yd | 0 | 0 |
About Knox County
- Population: 506,748 (2024 estimate)
- State: Tennessee
- NOAA Weather Radio SAME code: 047093 (how to use it)
- Cities: Knoxville