Alert archive / Tennessee / Union County
Weather alerts in Union County, Tennessee, 2010
113 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Union County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 113
- Warnings
- 22
- Watches
- 15
- Advisories
- 55
- Busiest month
- May18 alerts
- Busiest day
- March 12, 20107 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Union County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 10 | 23% | 4 | 75% | 8 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 30 | 6 | 80% | 9 | 89% | 20 min |
| NWS Morristown, TN: severe thunderstorm warnings | 212 | 158 | 25% | 289 | 79% | 22 min |
| NWS Morristown, TN: flash flood warnings | 23 | 12 | 48% | 23 | 78% | 67 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 6, 3:06 PM EST | Winter Weather Advisory | MRX | 60 hr |
| Jan 23, 3:42 PM EST | Wind Advisory | MRX | 24 hr |
| Jan 24, 1:10 PM EST | Flood Watch | MRX | 8 hr |
| Jan 24, 3:15 PM EST | Areal Flood Advisory | MRX | 5 hr |
| Jan 24, 5:15 PM EST | Areal Flood Warning | MRX | 3 hr |
| Jan 24, 8:04 PM EST | Areal Flood Warning | MRX | 6 hr |
| Jan 25, 2:00 AM EST | Areal Flood Warning | MRX | 3 hr |
| Jan 25, 5:07 AM EST | Wind Advisory | MRX | 17 hr |
| Jan 27, 2:59 PM EST | Winter Storm Watch | MRX | 24 hr |
| Jan 28, 2:56 PM EST | Winter Storm Warning | MRX | 48 hr |
| Jan 29, 9:06 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 9:28 AM EST | Winter Weather Advisory | MRX | 17 hr |
| Feb 5, 8:20 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 9, 4:25 AM EST | Wind Advisory | MRX | 47 hr |
| Feb 13, 3:32 PM EST | Winter Storm Watch | MRX | 12 hr |
| Feb 14, 3:44 AM EST | Winter Weather Advisory | MRX | 4 days |
| Feb 24, 3:25 PM EST | Winter Weather Advisory | MRX | 37 hr |
| Mar 1, 3:20 PM EST | Winter Weather Advisory | MRX | 28 hr |
| Mar 12, 4:05 AM EST | Wind Advisory | MRX | 6 hr |
| Mar 12, 11:32 AM EST | Mesoscale Discussion | SPC | 58 min |
| Mar 12, 12:04 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 12, 12:15 PM EST | Areal Flood Advisory | MRX | 4 hr |
| Mar 12, 2:32 PM EST | Areal Flood Warning | MRX | 4 hr |
| Mar 12, 2:38 PM EST | Severe Thunderstorm Warning | MRX | 19 min |
| Mar 12, 2:40 PM EST | Mesoscale Discussion | SPC | 65 min |
| Mar 27, 2:40 AM EDT | Wind Advisory | MRX | 36 hr |
| Apr 9, 3:02 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 24, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 24, 7:15 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 25, 12:05 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 27, 3:33 AM EDT | Frost Advisory | MRX | 29 hr |
| May 1, 7:54 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 2, 3:31 AM EDT | Flash Flood Watch | MRX | 27 hr |
| May 2, 3:32 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 2, 7:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 3, 12:37 AM EDT | Areal Flood Advisory | MRX | 6 hr |
| May 3, 1:11 AM EDT | Areal Flood Warning | MRX | 6 hr |
| May 14, 12:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 15, 2:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 1:38 PM EDT | Areal Flood Advisory | MRX | 112 min |
| May 16, 2:46 PM EDT | Areal Flood Advisory | MRX | 119 min |
| May 16, 2:47 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| May 17, 12:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 17, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 17, 6:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 1:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 4:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 28, 4:43 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| May 28, 4:59 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 2, 5:17 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Jun 11, 1:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 12:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 14, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 14, 4:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 14, 4:28 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| Jun 14, 5:09 PM EDT | Severe Thunderstorm Warning | MRX | 66 min |
| Jun 15, 1:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 2:33 PM EDT | Severe Thunderstorm Warning | MRX | 57 min |
| Jun 15, 3:14 PM EDT | Severe Thunderstorm Warning | MRX | 61 min |
| Jun 19, 11:59 AM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 24, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 5:45 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 27, 2:50 PM EDT | Severe Thunderstorm Warning | MRX | 43 min |
| Jun 27, 2:55 PM EDT | Areal Flood Advisory | MRX | 47 min |
| Jun 28, 7:01 PM EDT | Areal Flood Advisory | MRX | 119 min |
| Jul 9, 1:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 19, 7:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 20, 3:11 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jul 21, 3:13 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 22, 12:16 PM EDT | Areal Flood Advisory | MRX | 119 min |
| Jul 22, 2:12 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jul 26, 1:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 1, 1:48 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 2, 3:19 PM EDT | Heat Advisory | MRX | 3 days |
| Aug 5, 1:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 5, 1:47 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 2:01 PM EDT | Severe Thunderstorm Warning | MRX | 44 min |
| Aug 5, 4:07 PM EDT | Areal Flood Advisory | MRX | 113 min |
| Aug 5, 5:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 17, 4:10 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 18, 3:08 AM EDT | Flash Flood Watch | MRX | 31 hr |
| Aug 18, 9:07 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 18, 11:30 AM EDT | Flash Flood Warning | MRX | 6 hr |
| Aug 18, 11:57 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 18, 12:04 PM EDT | Areal Flood Advisory | MRX | 6 hr |
| Aug 18, 2:33 PM EDT | Flash Flood Warning | MRX | 6 hr |
| Aug 19, 4:39 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 19, 11:09 PM EDT | Dense Fog Advisory | MRX | 10 hr |
| Aug 21, 11:53 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 11, 5:59 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Sep 11, 6:27 PM EDT | Severe Thunderstorm Warning | MRX | 33 min |
| Sep 11, 6:36 PM EDT | Areal Flood Advisory | MRX | 114 min |
| Sep 11, 6:51 PM EDT | Severe Thunderstorm Warning | MRX | 24 min |
| Oct 5, 10:39 AM EDT | Frost Advisory | MRX | 22 hr |
| Oct 6, 2:51 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 15, 3:01 PM EDT | Frost Advisory | MRX | 17 hr |
| Oct 16, 2:50 PM EDT | Frost Advisory | MRX | 19 hr |
| Oct 21, 2:41 PM EDT | Frost Advisory | MRX | 17 hr |
| Oct 25, 7:31 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Oct 26, 2:33 AM EDT | Wind Advisory | MRX | 19 hr |
| Oct 26, 2:16 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 27, 11:05 PM EDT | Dense Fog Advisory | MRX | 8 hr |
| Nov 23, 10:05 PM EST | Dense Fog Advisory | MRX | 11 hr |
| Nov 28, 9:30 PM EST | Wind Advisory | MRX | 37 hr |
| Nov 30, 9:37 AM EST | Areal Flood Advisory | MRX | 4 hr |
| Dec 1, 7:41 AM EST | Areal Flood Advisory | MRX | 6 hr |
| Dec 11, 3:31 PM EST | Winter Weather Advisory | MRX | 51 hr |
| Dec 15, 3:51 AM EST | Winter Storm Warning | MRX | 32 hr |
| Dec 15, 3:51 AM EST | Winter Weather Advisory | MRX | 32 hr |
| Dec 15, 7:18 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 16, 4:17 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 24, 3:22 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Dec 25, 4:07 PM EST | Winter Weather Advisory | MRX | 31 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 | 13 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 21 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 27 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Frost Advisory | 7 |
| 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 archive20092011
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.