Alert archive / Tennessee / Knox County
Weather alerts in Knox County, Tennessee, 2025
148 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Knox County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 148
- Warnings
- 38
- Watches
- 15
- Advisories
- 46
- Busiest month
- May32 alerts
- Busiest day
- September 4, 202511 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 6 tornado warnings covering Knox County in 2025 had a tornado report inside them.
Knox County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 25 | 25 | 0% | 24 | 79% | 26 min |
| Flash flood warnings | 4 | 2 | 50% | 2 | 100% | 53 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 28 | 2 | 93% | 3 | 67% | 11 min |
| NWS Morristown, TN: severe thunderstorm warnings | 231 | 187 | 19% | 300 | 84% | 22 min |
| NWS Morristown, TN: flash flood warnings | 66 | 36 | 45% | 66 | 85% | 70 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 4, 3:31 AM EST | Winter Weather Advisory | MRX | 39 hr |
| Jan 8, 3:33 AM EST | Winter Storm Watch | MRX | 32 hr |
| Jan 9, 11:46 AM EST | Winter Storm Warning | MRX | 43 hr |
| Jan 18, 2:34 PM EST | Extreme Cold Watch | MRX | 13 hr |
| Jan 19, 3:37 AM EST | Cold Weather Advisory | MRX | 32 hr |
| Jan 20, 3:23 PM EST | Cold Weather Advisory | MRX | 43 hr |
| Feb 2, 3:10 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Feb 6, 1:08 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 5:10 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 7:27 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 6, 7:41 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 6, 8:39 PM EST | Tornado Warning | MRX | 36 min |
| Feb 6, 8:59 PM EST | Tornado Warning | MRX | 46 min |
| Feb 6, 9:28 PM EST | Mesoscale Discussion | SPC | 62 min |
| Feb 6, 10:05 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 6, 10:48 PM EST | Flash Flood Warning | MRX | 4 hr |
| Feb 10, 2:03 PM EST | Flood Watch | MRX | 61 hr |
| Feb 12, 10:01 PM EST | Areal Flood Advisory | MRX | 5 hr |
| Feb 15, 3:26 AM EST | Wind Advisory | MRX | 33 hr |
| Feb 16, 2:40 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 16, 3:10 AM EST | Special Weather Statement | MRX | 50 min |
| Feb 16, 3:47 AM EST | Special Weather Statement | MRX | 43 min |
| Feb 17, 3:23 PM EST | Winter Weather Advisory | MRX | 3 days |
| Feb 20, 3:18 AM EST | Cold Weather Advisory | MRX | 31 hr |
| Feb 28, 8:50 PM EST | Red Flag Warning | MRX | 23 hr |
| Mar 3, 1:30 PM EST | Wind Advisory | MRX | 54 hr |
| Mar 14, 1:02 PM EDT | Flood Watch | MRX | 43 hr |
| Mar 15, 1:34 AM EDT | Wind Advisory | MRX | 30 hr |
| Mar 15, 4:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Mar 15, 5:58 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 15, 8:02 PM EDT | Tornado Warning | MRX | 43 min |
| Mar 15, 8:31 PM EDT | Severe Thunderstorm Warning | MRX | 26 min |
| Mar 15, 9:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 16, 3:18 AM EDT | Areal Flood Warning | MRX | 7 hr |
| Mar 18, 2:00 PM EDT | Wind Advisory | MRX | 42 hr |
| Mar 31, 12:29 AM EDT | Mesoscale Discussion | SPC | 46 min |
| Mar 31, 1:40 AM EDT | Tornado Watch | SPC | 4 hr |
| Mar 31, 4:09 AM EDT | Special Weather Statement | MRX | 51 min |
| Apr 6, 3:25 AM EDT | Special Weather Statement | MRX | 50 min |
| Apr 10, 4:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 5:03 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 10, 5:07 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Apr 10, 5:37 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Apr 10, 6:06 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| Apr 25, 2:13 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Apr 25, 12:56 PM EDT | Special Weather Statement | MRX | 49 min |
| Apr 25, 1:03 PM EDT | Severe Thunderstorm Warning | MRX | 42 min |
| Apr 25, 1:36 PM EDT | Severe Thunderstorm Warning | MRX | 24 min |
| Apr 25, 6:22 PM EDT | Special Weather Statement | MRX | 23 min |
| Apr 25, 6:44 PM EDT | Special Weather Statement | MRX | 46 min |
| May 2, 1:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 2, 4:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 2, 4:29 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| May 2, 4:37 PM EDT | Severe Thunderstorm Warning | MRX | 19 min |
| May 2, 4:59 PM EDT | Special Weather Statement | MRX | 46 min |
| May 2, 5:14 PM EDT | Special Weather Statement | MRX | 46 min |
| May 8, 12:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 8, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 8, 4:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 8, 7:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 9, 4:56 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| May 12, 1:56 PM EDT | Special Weather Statement | MRX | 49 min |
| May 12, 2:13 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 16, 9:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 16, 9:37 PM EDT | Tornado Watch | SPC | 6 hr |
| May 17, 1:39 AM EDT | Severe Thunderstorm Warning | MRX | 51 min |
| May 17, 2:08 AM EDT | Severe Thunderstorm Warning | MRX | 52 min |
| May 17, 2:15 AM EDT | Severe Thunderstorm Warning | MRX | 60 min |
| May 17, 2:42 AM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| May 17, 2:47 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 17, 3:18 AM EDT | Mesoscale Discussion | SPC | 87 min |
| May 20, 2:37 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| May 20, 3:00 PM EDT | Tornado Warning | MRX | 45 min |
| May 20, 6:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 20, 7:27 PM EDT | Tornado Watch | SPC | 6 hr |
| May 20, 9:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 20, 9:25 PM EDT | Severe Thunderstorm Warning | MRX | 65 min |
| May 20, 9:59 PM EDT | Tornado Warning | MRX | 46 min |
| May 20, 10:13 PM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| May 20, 10:28 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| May 20, 10:36 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 30, 4:10 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 4:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 7:34 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 7, 2:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | 18 days |
| Jun 13, 8:36 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jun 17, 7:38 PM EDT | Special Weather Statement | MRX | 37 min |
| Jun 23, 11:42 AM EDT | Heat Advisory | MRX | 3 days |
| Jun 27, 3:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 3:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 1, 3:41 PM EDT | Special Weather Statement | MRX | 49 min |
| Jul 1, 6:31 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 1, 6:48 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 10, 10:01 PM EDT | Areal Flood Advisory | MRX | 119 min |
| Jul 12, 2:04 PM EDT | Special Weather Statement | MRX | 41 min |
| Jul 21, 4:50 PM EDT | Flash Flood Warning | MRX | 74 min |
| Jul 21, 5:17 PM EDT | Special Weather Statement | MRX | 43 min |
| Jul 21, 6:04 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Jul 21, 6:04 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 22, 5:21 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Jul 27, 1:40 PM EDT | Heat Advisory | MRX | 3 days |
| Jul 28, 12:03 PM EDT | Special Weather Statement | MRX | 27 min |
| Jul 29, 1:44 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 30, 5:09 PM EDT | Areal Flood Advisory | MRX | 4 hr |
| Jul 30, 5:20 PM EDT | Special Weather Statement | MRX | 40 min |
| Jul 30, 6:16 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 31, 10:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Aug 7, 10:09 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 12, 8:08 AM EDT | Areal Flood Advisory | MRX | 82 min |
| Aug 13, 3:43 AM EDT | Flood Watch | MRX | 11 hr |
| Aug 13, 9:52 AM EDT | Flash Flood Warning | MRX | 3 hr |
| Aug 16, 7:11 PM EDT | Special Weather Statement | MRX | 49 min |
| Aug 17, 5:28 PM EDT | Special Weather Statement | MRX | 32 min |
| Aug 22, 10:03 PM EDT | Flash Flood Warning | MRX | 4 hr |
| Aug 23, 7:49 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Aug 23, 10:08 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 24, 12:03 AM EDT | Areal Flood Advisory | MRX | 117 min |
| Sep 3, 7:14 PM EDT | Special Weather Statement | MRX | 46 min |
| Sep 4, 12:46 PM EDT | Tornado Warning | MRX | 44 min |
| Sep 4, 1:15 PM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Sep 4, 1:25 PM EDT | Severe Thunderstorm Warning | MRX | 35 min |
| Sep 4, 1:52 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Sep 4, 1:56 PM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| Sep 4, 2:04 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 4, 2:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 2:30 PM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Sep 4, 2:56 PM EDT | Severe Thunderstorm Warning | MRX | 19 min |
| Sep 4, 3:57 PM EDT | Severe Thunderstorm Warning | MRX | 14 min |
| Sep 4, 4:27 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 4, 11:35 PM EDT | Dense Fog Advisory | MRX | 9 hr |
| Sep 5, 9:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Sep 25, 2:55 PM EDT | Special Weather Statement | MRX | 50 min |
| Oct 19, 2:13 PM EDT | Special Weather Statement | MRX | 47 min |
| Nov 3, 3:08 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Nov 4, 4:42 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Nov 8, 6:23 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Nov 9, 1:01 AM EST | Winter Weather Advisory | MRX | 51 hr |
| Nov 9, 5:02 AM EST | Dense Fog Advisory | MRX | 3 hr |
| Nov 10, 7:03 AM EST | Winter Storm Watch | MRX | 3 min |
| Nov 20, 6:15 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Dec 7, 4:03 AM EST | Freezing Fog Advisory | MRX | 6 hr |
| Dec 10, 12:35 AM EST | Wind Advisory | MRX | 24 hr |
| Dec 13, 12:24 PM EST | Cold Weather Advisory | MRX | 46 hr |
| Dec 18, 11:08 PM EST | Special Weather Statement | MRX | 52 min |
| Dec 18, 11:31 PM EST | Severe Thunderstorm Warning | MRX | 44 min |
| Dec 27, 11:43 PM EST | Wind Advisory | MRX | 43 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 25 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 25 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| Flood Watch | 3 |
| Areal Flood Advisory | 20 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Extreme Cold Watch | 1 |
| Cold Weather Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.