Alert archive / Tennessee / Polk County
Weather alerts in Polk County, Tennessee, 2022
96 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Polk County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 96
- Warnings
- 17
- Watches
- 13
- Advisories
- 33
- Busiest month
- July14 alerts
- Busiest day
- January 2, 20225 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Polk County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 3 | 25% | 0 | ||
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 4 | 0 | 100% | 0 | ||
| NWS Morristown, TN: severe thunderstorm warnings | 185 | 150 | 19% | 242 | 85% | 18 min |
| NWS Morristown, TN: flash flood warnings | 51 | 27 | 47% | 66 | 82% | 91 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 1, 3:31 AM EST | Wind Advisory | MRX | 20 hr |
| Jan 1, 6:53 PM EST | Mesoscale Discussion | SPC | 67 min |
| Jan 1, 7:53 PM EST | Tornado Watch | SPC | 7 hr |
| Jan 1, 9:30 PM EST | Mesoscale Discussion | SPC | 60 min |
| Jan 1, 10:44 PM EST | Special Weather Statement | MRX | 46 min |
| Jan 2, 4:03 AM EST | Winter Storm Warning | MRX | 30 hr |
| Jan 2, 4:03 AM EST | Winter Weather Advisory | MRX | 24 hr |
| Jan 2, 7:19 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 2, 10:25 PM EST | Winter Weather Advisory | MRX | 8 hr |
| Jan 5, 2:59 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Jan 13, 3:06 PM EST | Winter Storm Watch | MRX | 48 hr |
| Jan 15, 4:29 AM EST | Winter Storm Warning | MRX | 63 hr |
| Jan 15, 4:29 AM EST | Winter Weather Advisory | MRX | 59 hr |
| Feb 2, 3:31 AM EST | Flood Watch | MRX | 42 hr |
| Feb 11, 2:20 PM EST | Red Flag Warning | MRX | 5 hr |
| Feb 16, 3:01 PM EST | Wind Advisory | MRX | 34 hr |
| Feb 17, 8:19 PM EST | Special Weather Statement | MRX | 41 min |
| Feb 21, 2:33 PM EST | Flood Watch | MRX | 42 hr |
| Mar 6, 3:02 PM EST | Wind Advisory | MRX | 28 hr |
| Mar 7, 2:20 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 10, 3:13 PM EST | Winter Storm Watch | MRX | 13 hr |
| Mar 11, 3:54 AM EST | Winter Storm Warning | MRX | 36 hr |
| Mar 23, 1:13 PM EDT | Special Weather Statement | MRX | 32 min |
| Mar 23, 1:16 PM EDT | Wind Advisory | MRX | 7 hr |
| Mar 25, 3:21 PM EDT | Wind Advisory | MRX | 29 hr |
| Mar 27, 3:11 AM EDT | Red Flag Warning | MRX | 17 hr |
| Mar 27, 8:16 PM EDT | Frost Advisory | MRX | 7 hr |
| Mar 29, 10:30 AM EDT | Wind Advisory | MRX | 44 hr |
| Mar 30, 10:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Mar 31, 12:01 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 31, 2:29 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 6, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Apr 6, 4:59 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 6, 7:11 PM EDT | Special Weather Statement | MRX | 64 min |
| Apr 6, 7:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 6, 8:00 PM EDT | Flash Flood Warning | MRX | 2 hr |
| Apr 8, 3:23 PM EDT | Frost Advisory | MRX | 12 hr |
| Apr 8, 3:23 PM EDT | Freeze Warning | MRX | 19 hr |
| Apr 9, 3:02 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 9, 3:02 PM EDT | Freeze Warning | MRX | 18 hr |
| May 3, 10:08 PM EDT | Special Weather Statement | MRX | 52 min |
| May 3, 10:35 PM EDT | Severe Thunderstorm Warning | MRX | 55 min |
| May 6, 1:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 6, 1:41 PM EDT | Tornado Watch | SPC | 6 hr |
| May 6, 4:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 6, 4:07 PM EDT | Special Weather Statement | MRX | 38 min |
| May 22, 6:38 PM EDT | Special Weather Statement | MRX | 52 min |
| May 22, 7:25 PM EDT | Special Weather Statement | MRX | 50 min |
| May 26, 3:59 AM EDT | Flood Watch | MRX | 32 hr |
| Jun 2, 7:16 PM EDT | Areal Flood Advisory | MRX | 86 min |
| Jun 7, 9:37 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 8, 8:02 PM EDT | Special Weather Statement | MRX | 43 min |
| Jun 13, 3:28 PM EDT | Heat Advisory | MRX | 29 hr |
| Jun 14, 3:26 PM EDT | Heat Advisory | MRX | 29 hr |
| Jun 15, 3:07 PM EDT | Heat Advisory | MRX | 29 hr |
| Jun 17, 10:01 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 17, 12:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 17, 2:56 PM EDT | Special Weather Statement | MRX | 49 min |
| Jul 5, 8:47 PM EDT | Special Weather Statement | MRX | 43 min |
| Jul 6, 3:36 AM EDT | Heat Advisory | MRX | 16 hr |
| Jul 6, 7:22 PM EDT | Severe Thunderstorm Warning | MRX | 38 min |
| Jul 6, 7:34 PM EDT | Areal Flood Advisory | MRX | 21 min |
| Jul 7, 3:45 AM EDT | Heat Advisory | MRX | 15 hr |
| Jul 7, 1:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 8, 3:34 AM EDT | Heat Advisory | MRX | 15 hr |
| Jul 18, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 5:40 AM EDT | Special Weather Statement | MRX | 65 min |
| Jul 21, 6:33 AM EDT | Special Weather Statement | MRX | 57 min |
| Jul 23, 7:07 PM EDT | Areal Flood Advisory | MRX | 101 min |
| Jul 28, 9:38 PM EDT | Special Weather Statement | MRX | 37 min |
| Jul 28, 10:10 PM EDT | Special Weather Statement | MRX | 50 min |
| Jul 30, 8:14 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 5, 5:37 PM EDT | Severe Thunderstorm Warning | MRX | 10 min |
| Aug 5, 6:02 PM EDT | Special Weather Statement | MRX | 43 min |
| Aug 6, 11:39 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 8, 3:39 PM EDT | Flash Flood Warning | MRX | 87 min |
| Aug 9, 5:08 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Aug 20, 5:21 PM EDT | Special Weather Statement | MRX | 54 min |
| Aug 28, 2:20 PM EDT | Special Weather Statement | MRX | 40 min |
| Aug 28, 2:58 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 4, 3:02 AM EDT | Flood Watch | MRX | 41 hr |
| Sep 30, 3:38 AM EDT | Wind Advisory | MRX | 28 hr |
| Oct 8, 3:13 AM EDT | Frost Advisory | MRX | 29 hr |
| Oct 16, 4:08 AM EDT | Freeze Watch | MRX | 11 hr |
| Oct 16, 3:12 PM EDT | Freeze Warning | MRX | 43 hr |
| Oct 18, 2:53 AM EDT | Freeze Warning | MRX | 31 hr |
| Oct 19, 2:49 PM EDT | Freeze Warning | MRX | 19 hr |
| Nov 27, 11:43 AM EST | Wind Advisory | MRX | 7 hr |
| Nov 29, 5:42 PM EST | Special Weather Statement | MRX | 48 min |
| Nov 29, 6:14 PM EST | Special Weather Statement | MRX | 46 min |
| Dec 7, 10:56 PM EST | Dense Fog Advisory | MRX | 10 hr |
| Dec 9, 9:02 PM EST | Dense Fog Advisory | MRX | 13 hr |
| Dec 21, 3:49 AM EST | Wind Chill Watch | MRX | 12 hr |
| Dec 21, 3:30 PM EST | Wind Chill Warning | MRX | 70 hr |
| Dec 22, 4:04 AM EST | Winter Weather Advisory | MRX | 32 hr |
| Dec 22, 2:49 PM EST | Wind Advisory | MRX | 25 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 | 4 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flood Watch | 4 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 5 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 9 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.