Alert archive / Tennessee / Polk County
Weather alerts in Polk County, Tennessee, 2019
80 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 80
- Warnings
- 8
- Watches
- 11
- Advisories
- 24
- Busiest month
- June25 alerts
- Busiest day
- June 22, 20198 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, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 4 | 0% | 1 | 100% | 41 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 5 | 0 | 100% | 3 | 0% | |
| NWS Morristown, TN: severe thunderstorm warnings | 126 | 101 | 20% | 239 | 74% | 20 min |
| NWS Morristown, TN: flash flood warnings | 24 | 12 | 50% | 37 | 51% | 36 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 8, 10:31 AM EST | Wind Advisory | MRX | 37 hr |
| Jan 18, 5:30 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Jan 18, 3:04 PM EST | Wind Advisory | MRX | 30 hr |
| Jan 20, 2:35 AM EST | Wind Advisory | MRX | 13 hr |
| Jan 23, 3:54 AM EST | Wind Advisory | MRX | 18 hr |
| Jan 27, 3:11 PM EST | Winter Storm Watch | MRX | 13 hr |
| Jan 28, 3:56 AM EST | Winter Weather Advisory | MRX | 35 hr |
| Feb 7, 10:26 AM EST | Wind Advisory | MRX | 10 hr |
| Feb 19, 3:52 AM EST | Flood Watch | MRX | 45 hr |
| Feb 21, 11:29 AM EST | Flood Watch | MRX | 68 hr |
| Feb 23, 11:03 AM EST | Wind Advisory | MRX | 44 hr |
| Feb 23, 8:54 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Mar 9, 7:59 PM EST | Special Weather Statement | MRX | 46 min |
| Mar 9, 11:56 PM EST | Special Weather Statement | MRX | 49 min |
| Mar 18, 3:19 AM EDT | Freeze Watch | MRX | 12 hr |
| Mar 18, 2:53 PM EDT | Freeze Warning | MRX | 18 hr |
| Mar 22, 3:32 PM EDT | Frost Advisory | MRX | 11 hr |
| Mar 30, 6:00 AM EDT | Freeze Watch | MRX | 22 hr |
| Mar 31, 4:03 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 7, 6:16 PM EDT | Special Weather Statement | MRX | 59 min |
| Apr 7, 6:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 13, 3:14 PM EDT | Wind Advisory | MRX | 29 hr |
| Apr 14, 9:47 AM EDT | Special Weather Statement | MRX | 43 min |
| Apr 14, 3:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 10:41 AM EDT | Mesoscale Discussion | SPC | 94 min |
| May 4, 11:32 AM EDT | Special Weather Statement | MRX | 43 min |
| May 9, 2:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 11, 10:50 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 7, 5:35 PM EDT | Special Weather Statement | MRX | 40 min |
| Jun 7, 6:29 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 9, 5:59 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 17, 12:56 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 17, 1:04 PM EDT | Special Weather Statement | MRX | 41 min |
| Jun 17, 4:16 PM EDT | Special Weather Statement | MRX | 44 min |
| Jun 17, 4:46 PM EDT | Special Weather Statement | MRX | 44 min |
| Jun 20, 5:00 AM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 20, 6:31 AM EDT | Severe Thunderstorm Warning | MRX | 59 min |
| Jun 20, 7:56 PM EDT | Special Weather Statement | MRX | 64 min |
| Jun 21, 6:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 8:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 21, 10:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 21, 11:25 PM EDT | Severe Thunderstorm Warning | MRX | 65 min |
| Jun 22, 12:04 AM EDT | Severe Thunderstorm Warning | MRX | 56 min |
| Jun 22, 12:44 PM EDT | Special Weather Statement | MRX | 61 min |
| Jun 22, 1:41 PM EDT | Special Weather Statement | MRX | 64 min |
| Jun 22, 2:33 PM EDT | Special Weather Statement | MRX | 42 min |
| Jun 22, 7:57 PM EDT | Special Weather Statement | MRX | 48 min |
| Jun 22, 8:35 PM EDT | Areal Flood Advisory | MRX | 115 min |
| Jun 24, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 24, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 4:41 PM EDT | Special Weather Statement | MRX | 49 min |
| Jun 24, 4:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 24, 5:29 PM EDT | Severe Thunderstorm Warning | MRX | 31 min |
| Jul 11, 9:26 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 11, 7:41 PM EDT | Special Weather Statement | MRX | 49 min |
| Jul 22, 10:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 31, 4:23 PM EDT | Special Weather Statement | MRX | 52 min |
| Jul 31, 5:06 PM EDT | Areal Flood Advisory | MRX | 114 min |
| Aug 1, 6:42 PM EDT | Special Weather Statement | MRX | 33 min |
| Aug 1, 7:22 PM EDT | Special Weather Statement | MRX | 53 min |
| Aug 4, 8:48 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Aug 7, 12:59 AM EDT | Special Weather Statement | MRX | 61 min |
| Aug 7, 4:24 PM EDT | Special Weather Statement | MRX | 51 min |
| Aug 12, 3:02 PM EDT | Heat Advisory | MRX | 29 hr |
| Aug 13, 3:49 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 13, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 13, 7:32 PM EDT | Special Weather Statement | MRX | 43 min |
| Aug 13, 7:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Oct 17, 3:19 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 21, 4:01 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Oct 28, 6:11 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Oct 30, 3:23 PM EDT | Flood Watch | MRX | 24 hr |
| Oct 31, 3:16 AM EDT | Freeze Warning | MRX | 31 hr |
| Nov 1, 3:32 AM EDT | Freeze Watch | MRX | 12 hr |
| Nov 1, 3:25 PM EDT | Freeze Warning | MRX | 19 hr |
| Dec 16, 8:39 PM EST | Special Weather Statement | MRX | 66 min |
| Dec 25, 2:58 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Dec 29, 11:58 PM EST | Special Weather Statement | MRX | 47 min |
| Dec 30, 12:44 AM EST | Special Weather Statement | MRX | 46 min |
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 | 4 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 26 |
| Flooding | |
| Flood Watch | 3 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.