Alert archive / Tennessee / Polk County
Weather alerts in Polk County, Tennessee, 2008
119 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 119
- Warnings
- 39
- Watches
- 15
- Advisories
- 48
- Busiest month
- July18 alerts
- Busiest day
- February 6, 20086 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 1 tornado warnings covering Polk County in 2008 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.
Polk County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 2 | 0% | |
| Severe thunderstorm warnings | 30 | 21 | 30% | 9 | 100% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 7 | 0 | 100% | 3 | 0% | |
| NWS Morristown, TN: severe thunderstorm warnings | 298 | 230 | 23% | 400 | 87% | 21 min |
| NWS Morristown, TN: flash flood warnings | 5 | 2 | 60% | 8 | 25% | 48 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, 7:26 PM EST | Lake Wind Advisory | MRX | 8 hr |
| Jan 10, 3:47 AM EST | Wind Advisory | MRX | 27 hr |
| Jan 10, 7:29 PM EST | Mesoscale Discussion | SPC | 61 min |
| Jan 10, 7:47 PM EST | Severe Thunderstorm Warning | MRX | 43 min |
| Jan 10, 8:32 PM EST | Severe Thunderstorm Warning | MRX | 43 min |
| Jan 10, 10:36 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Jan 16, 4:13 AM EST | Winter Weather Advisory | MRX | 30 hr |
| Jan 16, 7:55 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 18, 2:54 PM EST | Snow Advisory | MRX | 24 hr |
| Jan 29, 3:27 PM EST | Wind Advisory | MRX | 16 hr |
| Jan 29, 7:11 PM EST | High Wind Warning | MRX | 12 hr |
| Jan 29, 10:24 PM EST | Severe Thunderstorm Warning | MRX | 36 min |
| Jan 29, 10:58 PM EST | Severe Thunderstorm Warning | MRX | 47 min |
| Jan 29, 11:36 PM EST | Severe Thunderstorm Warning | MRX | 39 min |
| Jan 31, 2:53 PM EST | Wind Advisory | MRX | 18 hr |
| Feb 1, 11:26 AM EST | Lake Wind Advisory | MRX | 8 hr |
| Feb 5, 3:10 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Feb 5, 3:10 AM EST | Wind Advisory | MRX | 40 hr |
| Feb 6, 2:41 AM EST | High Wind Warning | MRX | 16 hr |
| Feb 6, 3:41 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 5:06 AM EST | Tornado Watch | SPC | 6 hr |
| Feb 6, 7:10 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 7:44 AM EST | Severe Thunderstorm Warning | MRX | 46 min |
| Feb 6, 8:49 AM EST | Mesoscale Discussion | SPC | 116 min |
| Feb 9, 3:00 PM EST | Lake Wind Advisory | MRX | 29 hr |
| Feb 12, 4:05 AM EST | Wind Advisory | MRX | 15 hr |
| Feb 16, 9:10 PM EST | Wind Advisory | MRX | 26 hr |
| Feb 17, 2:57 AM EST | Lake Wind Advisory | MRX | 16 hr |
| Feb 19, 2:41 AM EST | Lake Wind Advisory | MRX | 15 hr |
| Feb 23, 2:53 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Mar 3, 3:22 PM EST | Wind Advisory | MRX | 28 hr |
| Mar 4, 11:17 AM EST | Mesoscale Discussion | SPC | 118 min |
| Mar 4, 12:04 PM EST | Tornado Watch | SPC | 8 hr |
| Mar 4, 1:21 PM EST | Severe Thunderstorm Warning | MRX | 54 min |
| Mar 7, 3:42 AM EST | Winter Storm Watch | MRX | 18 hr |
| Mar 7, 2:04 PM EST | Winter Weather Advisory | MRX | 29 hr |
| Mar 14, 8:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Mar 15, 3:57 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Mar 18, 3:39 AM EDT | Wind Advisory | MRX | 38 hr |
| Mar 19, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Mar 19, 5:43 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 19, 5:57 PM EDT | Severe Thunderstorm Warning | MRX | 63 min |
| Mar 19, 7:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Mar 24, 10:43 AM EDT | Snow Advisory | MRX | 5 hr |
| Mar 29, 4:33 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Apr 11, 4:00 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 11, 5:42 PM EDT | Severe Thunderstorm Warning | MRX | 63 min |
| Apr 11, 6:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 29, 2:58 PM EDT | Freeze Warning | MRX | 18 hr |
| May 8, 1:40 PM EDT | Tornado Watch | SPC | 5 hr |
| May 9, 8:55 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 10, 3:54 PM EDT | High Wind Watch | MRX | 13 hr |
| May 10, 3:54 PM EDT | Wind Advisory | MRX | 45 hr |
| May 11, 1:53 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 11, 4:48 AM EDT | Lake Wind Advisory | MRX | 15 hr |
| May 11, 9:52 AM EDT | Tornado Watch | SPC | 6 hr |
| May 18, 7:26 PM EDT | Severe Thunderstorm Warning | MRX | 64 min |
| May 18, 7:55 PM EDT | Severe Thunderstorm Warning | MRX | 65 min |
| May 18, 8:27 PM EDT | Tornado Warning | MRX | 33 min |
| May 19, 3:12 PM EDT | Lake Wind Advisory | MRX | 25 hr |
| May 19, 3:12 PM EDT | Wind Advisory | MRX | 25 hr |
| May 20, 2:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 20, 5:01 PM EDT | Severe Thunderstorm Warning | MRX | 59 min |
| May 20, 5:57 PM EDT | Severe Thunderstorm Warning | MRX | 32 min |
| Jun 1, 5:22 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 1, 5:50 AM EDT | Severe Thunderstorm Warning | MRX | 25 min |
| Jun 2, 4:21 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Jun 9, 2:46 PM EDT | Severe Thunderstorm Warning | MRX | 44 min |
| Jun 10, 12:41 AM EDT | Severe Thunderstorm Warning | MRX | 34 min |
| Jun 11, 2:17 PM EDT | Areal Flood Advisory | MRX | 58 min |
| Jun 28, 7:21 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jun 28, 8:00 PM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Jul 8, 1:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 8, 5:50 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 9, 1:15 AM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jul 9, 12:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 21, 6:03 PM EDT | Severe Thunderstorm Warning | MRX | 57 min |
| Jul 21, 6:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 21, 6:48 PM EDT | Severe Thunderstorm Warning | MRX | 42 min |
| Jul 21, 6:57 PM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| Jul 22, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 22, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 22, 4:39 PM EDT | Severe Thunderstorm Warning | MRX | 66 min |
| Jul 22, 4:53 PM EDT | Areal Flood Advisory | MRX | 112 min |
| Jul 22, 5:32 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| Jul 22, 6:46 PM EDT | Areal Flood Advisory | MRX | 59 min |
| Jul 28, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 2:51 PM EDT | Severe Thunderstorm Warning | MRX | 38 min |
| Jul 30, 3:47 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| Aug 2, 3:00 PM EDT | Severe Thunderstorm Warning | MRX | 60 min |
| Aug 2, 4:17 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| Aug 2, 5:14 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Aug 7, 11:29 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 25, 3:25 PM EDT | Flood Watch | MRX | 36 hr |
| Aug 26, 6:55 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 26, 9:49 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Oct 19, 3:39 AM EDT | Freeze Warning | MRX | 29 hr |
| Oct 24, 9:52 AM EDT | Wind Advisory | MRX | 6 hr |
| Oct 27, 6:24 PM EDT | Freeze Warning | MRX | 16 hr |
| Oct 28, 3:09 PM EDT | Freeze Warning | MRX | 18 hr |
| Nov 12, 3:44 PM EST | Wind Advisory | MRX | 17 hr |
| Nov 14, 2:45 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Nov 15, 10:09 AM EST | Winter Weather Advisory | MRX | 24 hr |
| Nov 30, 3:16 PM EST | Winter Weather Advisory | MRX | 33 hr |
| Dec 8, 3:37 PM EST | Wind Advisory | MRX | 42 hr |
| Dec 9, 3:52 PM EST | High Wind Warning | MRX | 18 hr |
| Dec 10, 3:28 AM EST | Severe Thunderstorm Warning | MRX | 47 min |
| Dec 10, 3:49 AM EST | Severe Thunderstorm Warning | MRX | 26 min |
| Dec 10, 8:37 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Dec 10, 1:30 PM EST | Flood Watch | MRX | 24 hr |
| Dec 11, 10:11 AM EST | Areal Flood Advisory | MRX | 6 hr |
| Dec 13, 3:08 PM EST | Wind Advisory | MRX | 37 hr |
| Dec 15, 4:15 AM EST | Wind Advisory | MRX | 7 hr |
| Dec 19, 10:11 AM EST | Wind Advisory | MRX | 11 hr |
| Dec 21, 3:08 PM EST | Wind Chill Advisory | MRX | 19 hr |
| Dec 23, 3:11 PM EST | Wind Advisory | MRX | 31 hr |
| Dec 24, 9:12 AM EST | High Wind Warning | MRX | 13 hr |
| Dec 27, 3:10 PM EST | Wind Advisory | MRX | 19 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 | 30 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 17 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Storm Watch | 1 |
| Snow Advisory | 2 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 1 |
| Lake Wind Advisory | 7 |
| Wind Advisory | 18 |
| 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 archive20072009
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.