Alert archive / Tennessee / Polk County
Weather alerts in Polk County, Tennessee, 2016
101 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 101
- Warnings
- 21
- Watches
- 10
- Advisories
- 31
- Busiest month
- July23 alerts
- Busiest day
- November 30, 201611 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering Polk County in 2016 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 28 minutes after it went out.
Polk County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 1 | 100% | 28 min |
| Severe thunderstorm warnings | 11 | 10 | 9% | 4 | 75% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 12 | 4 | 67% | 5 | 100% | 24 min |
| NWS Morristown, TN: severe thunderstorm warnings | 215 | 159 | 26% | 274 | 83% | 20 min |
| NWS Morristown, TN: flash flood warnings | 12 | 8 | 33% | 14 | 71% | 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 16, 2:48 PM EST | Winter Weather Advisory | MRX | 19 hr |
| Jan 19, 5:07 AM EST | Winter Weather Advisory | MRX | 41 hr |
| Jan 21, 5:21 AM EST | Winter Storm Warning | MRX | 65 hr |
| Jan 21, 5:21 AM EST | Winter Weather Advisory | MRX | 56 hr |
| Jan 21, 3:47 PM EST | Wind Advisory | MRX | 27 hr |
| Feb 1, 2:50 PM EST | Wind Advisory | MRX | 42 hr |
| Feb 2, 2:46 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Feb 3, 5:06 AM EST | Special Weather Statement | MRX | 39 min |
| Feb 3, 5:30 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 3, 8:23 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 7, 3:32 PM EST | Winter Weather Advisory | MRX | 3 days |
| Feb 15, 11:30 AM EST | Flood Watch | MRX | 16 hr |
| Feb 22, 3:06 PM EST | High Wind Watch | MRX | 25 hr |
| Feb 23, 3:31 AM EST | Flash Flood Watch | MRX | 31 hr |
| Feb 23, 3:38 PM EST | High Wind Warning | MRX | 21 hr |
| Feb 23, 3:38 PM EST | Wind Advisory | MRX | 33 hr |
| Mar 1, 2:00 PM EST | Mesoscale Discussion | SPC | 90 min |
| Mar 13, 7:43 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Mar 14, 12:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Mar 14, 2:24 PM EDT | Special Weather Statement | MRX | 51 min |
| Mar 19, 10:04 PM EDT | Freeze Watch | MRX | 16 hr |
| Mar 20, 2:29 PM EDT | Freeze Warning | MRX | 19 hr |
| Mar 21, 3:09 AM EDT | Freeze Watch | MRX | 12 hr |
| Mar 21, 2:46 PM EDT | Freeze Warning | MRX | 19 hr |
| Mar 31, 8:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Mar 31, 9:14 PM EDT | Tornado Watch | SPC | 18 hr |
| Mar 31, 11:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 2, 3:26 AM EDT | Freeze Warning | MRX | 31 hr |
| Apr 2, 3:26 AM EDT | Wind Advisory | MRX | 24 hr |
| Apr 6, 9:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Apr 8, 3:40 AM EDT | Freeze Watch | MRX | 24 hr |
| Apr 8, 3:40 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 8, 3:40 AM EDT | Wind Advisory | MRX | 35 hr |
| Apr 9, 3:27 AM EDT | Freeze Warning | MRX | 31 hr |
| Apr 9, 3:27 AM EDT | Hard Freeze Warning | MRX | 31 hr |
| Apr 22, 5:22 PM EDT | Special Weather Statement | MRX | 38 min |
| Apr 30, 5:22 PM EDT | Special Weather Statement | MRX | 38 min |
| Apr 30, 5:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 1, 3:39 PM EDT | Special Weather Statement | MRX | 51 min |
| May 2, 5:56 PM EDT | Special Weather Statement | MRX | 34 min |
| May 4, 5:16 PM EDT | Special Weather Statement | MRX | 59 min |
| May 11, 2:31 PM EDT | Special Weather Statement | MRX | 44 min |
| Jun 1, 4:21 PM EDT | Special Weather Statement | MRX | 39 min |
| Jun 2, 4:47 PM EDT | Special Weather Statement | MRX | 43 min |
| Jun 2, 5:18 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 14, 5:56 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 15, 8:32 PM EDT | Special Weather Statement | MRX | 28 min |
| Jun 15, 9:04 PM EDT | Special Weather Statement | MRX | 56 min |
| Jun 17, 12:44 AM EDT | Special Weather Statement | MRX | 46 min |
| Jun 26, 4:15 PM EDT | Special Weather Statement | MRX | 45 min |
| Jul 4, 2:43 PM EDT | Special Weather Statement | MRX | 62 min |
| Jul 6, 7:07 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Jul 6, 8:12 PM EDT | Severe Thunderstorm Warning | MRX | 33 min |
| Jul 6, 8:43 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 6, 8:48 PM EDT | Special Weather Statement | MRX | 27 min |
| Jul 7, 4:35 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 7, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 7, 7:38 PM EDT | Special Weather Statement | MRX | 52 min |
| Jul 8, 8:07 PM EDT | Severe Thunderstorm Warning | MRX | 38 min |
| Jul 9, 12:47 AM EDT | Severe Thunderstorm Warning | MRX | 43 min |
| Jul 13, 10:35 PM EDT | Special Weather Statement | MRX | 40 min |
| Jul 14, 4:09 PM EDT | Special Weather Statement | MRX | 51 min |
| Jul 14, 4:34 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jul 16, 2:16 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 16, 2:46 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 16, 2:56 PM EDT | Severe Thunderstorm Warning | MRX | 64 min |
| Jul 16, 3:05 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 17, 5:53 PM EDT | Special Weather Statement | MRX | 52 min |
| Jul 22, 8:57 PM EDT | Special Weather Statement | MRX | 48 min |
| Jul 23, 12:13 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 5:31 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 25, 5:45 PM EDT | Special Weather Statement | MRX | 45 min |
| Jul 29, 9:27 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 26, 9:46 PM EDT | Special Weather Statement | MRX | 44 min |
| Aug 28, 3:42 PM EDT | Special Weather Statement | MRX | 48 min |
| Aug 28, 4:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Aug 28, 4:29 PM EDT | Severe Thunderstorm Warning | MRX | 31 min |
| Oct 22, 3:28 AM EDT | Frost Advisory | MRX | 30 hr |
| Nov 9, 3:09 PM EST | Frost Advisory | MRX | 18 hr |
| Nov 10, 3:21 PM EST | Frost Advisory | MRX | 17 hr |
| Nov 11, 3:38 PM EST | Freeze Watch | MRX | 23 hr |
| Nov 12, 2:52 PM EST | Frost Advisory | MRX | 18 hr |
| Nov 18, 3:42 PM EST | Wind Advisory | MRX | 36 hr |
| Nov 25, 6:46 AM EST | Dense Fog Advisory | MRX | 2 hr |
| Nov 27, 2:52 PM EST | Wind Advisory | MRX | 40 hr |
| Nov 29, 3:28 PM EST | Wind Advisory | MRX | 24 hr |
| Nov 30, 2:00 AM EST | Tornado Warning | MRX | 30 min |
| Nov 30, 2:29 AM EST | Tornado Warning | MRX | 31 min |
| Nov 30, 3:54 AM EST | Tornado Watch | SPC | 7 hr |
| Nov 30, 4:42 AM EST | Severe Thunderstorm Warning | MRX | 33 min |
| Nov 30, 5:14 AM EST | Severe Thunderstorm Warning | MRX | 31 min |
| Nov 30, 5:46 AM EST | Severe Thunderstorm Warning | MRX | 44 min |
| Nov 30, 6:10 AM EST | Mesoscale Discussion | SPC | 95 min |
| Nov 30, 8:18 AM EST | Special Weather Statement | MRX | 42 min |
| Nov 30, 9:01 AM EST | Special Weather Statement | MRX | 59 min |
| Nov 30, 11:26 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Nov 30, 12:05 PM EST | Severe Thunderstorm Warning | MRX | 40 min |
| Dec 3, 3:21 PM EST | Wind Advisory | MRX | 31 hr |
| Dec 12, 12:51 AM EST | Wind Advisory | MRX | 7 hr |
| Dec 16, 4:11 AM EST | Wind Advisory | MRX | 51 hr |
| Dec 18, 6:06 AM EST | Special Weather Statement | MRX | 24 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 | 11 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 31 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 5 |
| Hard Freeze Warning | 1 |
| Freeze Watch | 4 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 11 |
| 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 archive20152017
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.