Alert archive / Tennessee / Union County
Weather alerts in Union County, Tennessee, 2015
124 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 124
- Warnings
- 24
- Watches
- 22
- Advisories
- 33
- Busiest month
- July26 alerts
- Busiest day
- July 14, 201513 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, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 14 | 7% | 5 | 100% | 21 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Morristown, TN: severe thunderstorm warnings | 170 | 127 | 25% | 196 | 93% | 22 min |
| NWS Morristown, TN: flash flood warnings | 18 | 8 | 56% | 14 | 71% | 45 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 7, 11:00 AM EST | Wind Chill Advisory | MRX | 23 hr |
| Jan 13, 10:37 PM EST | Freezing Rain Advisory | MRX | 11 hr |
| Feb 13, 3:19 PM EST | Wind Advisory | MRX | 36 hr |
| Feb 14, 3:52 PM EST | Winter Storm Watch | MRX | 24 hr |
| Feb 15, 5:25 AM EST | Winter Storm Warning | MRX | 47 hr |
| Feb 16, 10:09 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 16, 3:53 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Feb 17, 3:27 PM EST | Wind Chill Watch | MRX | 25 hr |
| Feb 17, 3:27 PM EST | Winter Weather Advisory | MRX | 39 hr |
| Feb 18, 4:02 PM EST | Wind Chill Advisory | MRX | 24 hr |
| Feb 18, 4:02 PM EST | Winter Storm Watch | MRX | 37 hr |
| Feb 19, 3:55 PM EST | Wind Chill Advisory | MRX | 6 hr |
| Feb 20, 4:59 AM EST | Winter Storm Warning | MRX | 38 hr |
| Feb 20, 2:45 PM EST | Flood Watch | MRX | 45 hr |
| Feb 21, 7:29 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 21, 10:20 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 22, 5:35 AM EST | Dense Fog Advisory | MRX | 4 hr |
| Feb 22, 10:34 AM EST | Dense Fog Advisory | MRX | 86 min |
| Feb 23, 3:11 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Feb 24, 4:29 AM EST | Winter Storm Watch | MRX | 23 hr |
| Feb 24, 9:59 PM EST | Winter Storm Warning | MRX | 33 hr |
| Feb 25, 3:33 AM EST | Winter Weather Advisory | MRX | 27 hr |
| Mar 3, 3:49 PM EST | Winter Storm Watch | MRX | 23 hr |
| Mar 4, 1:06 PM EST | Wind Advisory | MRX | 6 hr |
| Mar 4, 2:35 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Mar 26, 3:23 PM EDT | Freeze Watch | MRX | 13 hr |
| Mar 27, 4:13 AM EDT | Freeze Watch | MRX | 24 hr |
| Mar 27, 4:13 AM EDT | Freeze Warning | MRX | 31 hr |
| Mar 28, 4:04 AM EDT | Hard Freeze Warning | MRX | 31 hr |
| Apr 3, 3:56 AM EDT | Wind Advisory | MRX | 19 hr |
| Apr 3, 3:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 3, 4:10 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 4, 3:04 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 8, 3:21 AM EDT | Dense Fog Advisory | MRX | 7 hr |
| Apr 10, 4:09 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 10, 6:16 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Apr 10, 6:53 AM EDT | Special Weather Statement | MRX | 37 min |
| Apr 10, 7:34 AM EDT | Special Weather Statement | MRX | 41 min |
| Apr 18, 6:03 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Apr 19, 9:03 PM EDT | Severe Thunderstorm Warning | MRX | 27 min |
| Apr 19, 9:15 PM EDT | Severe Thunderstorm Warning | MRX | 30 min |
| Apr 19, 9:29 PM EDT | Severe Thunderstorm Warning | MRX | 31 min |
| Apr 23, 2:50 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 25, 9:45 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 25, 11:10 PM EDT | Special Weather Statement | MRX | 65 min |
| Apr 26, 12:06 AM EDT | Severe Thunderstorm Warning | MRX | 54 min |
| May 11, 3:24 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 31, 12:58 PM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| May 31, 3:42 PM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| Jun 2, 12:46 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 1:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 8, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 8, 3:40 PM EDT | Severe Thunderstorm Warning | MRX | 50 min |
| Jun 8, 4:14 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 8, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 8, 4:55 PM EDT | Special Weather Statement | MRX | 50 min |
| Jun 8, 5:01 PM EDT | Severe Thunderstorm Warning | MRX | 59 min |
| Jun 8, 5:20 PM EDT | Severe Thunderstorm Warning | MRX | 40 min |
| Jun 8, 6:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 8, 7:40 PM EDT | Special Weather Statement | MRX | 50 min |
| Jun 11, 4:44 PM EDT | Special Weather Statement | MRX | 46 min |
| Jun 19, 3:05 PM EDT | Special Weather Statement | MRX | 40 min |
| Jun 19, 3:40 PM EDT | Special Weather Statement | MRX | 35 min |
| Jun 21, 6:50 PM EDT | Special Weather Statement | MRX | 40 min |
| Jun 21, 7:04 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jun 21, 7:24 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 21, 7:40 PM EDT | Severe Thunderstorm Warning | MRX | 23 min |
| Jun 21, 7:43 PM EDT | Flash Flood Warning | MRX | 2 hr |
| Jun 26, 4:28 PM EDT | Special Weather Statement | MRX | 47 min |
| Jun 29, 8:58 PM EDT | Special Weather Statement | MRX | 62 min |
| Jun 30, 12:55 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 30, 7:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 1, 12:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 3:17 PM EDT | Special Weather Statement | MRX | 43 min |
| Jul 2, 5:56 PM EDT | Flood Watch | MRX | 63 min |
| Jul 2, 6:59 PM EDT | Flash Flood Watch | MRX | 3 days |
| Jul 4, 2:35 PM EDT | Areal Flood Advisory | MRX | 115 min |
| Jul 7, 11:14 PM EDT | Severe Thunderstorm Warning | MRX | 61 min |
| Jul 8, 1:57 AM EDT | Special Weather Statement | MRX | 33 min |
| Jul 13, 4:39 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 5:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 5:59 AM EDT | Special Weather Statement | MRX | 46 min |
| Jul 14, 6:35 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 14, 7:33 AM EDT | Special Weather Statement | MRX | 42 min |
| Jul 14, 8:08 AM EDT | Areal Flood Advisory | MRX | 112 min |
| Jul 14, 8:13 AM EDT | Special Weather Statement | MRX | 47 min |
| Jul 14, 9:30 AM EDT | Special Weather Statement | MRX | 45 min |
| Jul 14, 1:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 14, 1:52 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Jul 14, 2:44 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 14, 2:46 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 3:05 PM EDT | Severe Thunderstorm Warning | MRX | 55 min |
| Jul 14, 3:15 PM EDT | Flash Flood Watch | MRX | 13 hr |
| Jul 14, 3:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 14, 8:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 2:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 20, 2:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 28, 5:47 PM EDT | Special Weather Statement | MRX | 43 min |
| Aug 19, 9:28 PM EDT | Special Weather Statement | MRX | 47 min |
| Aug 19, 10:56 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 30, 4:03 PM EDT | Special Weather Statement | MRX | 42 min |
| Sep 30, 4:50 PM EDT | Special Weather Statement | MRX | 40 min |
| Oct 9, 2:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 9, 5:02 PM EDT | Special Weather Statement | MRX | 43 min |
| Oct 12, 5:21 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Oct 13, 12:19 AM EDT | Special Weather Statement | MRX | 41 min |
| Oct 17, 3:36 AM EDT | Frost Advisory | MRX | 29 hr |
| Oct 18, 2:49 PM EDT | Frost Advisory | MRX | 19 hr |
| Nov 13, 2:48 AM EST | Freeze Watch | MRX | 10 hr |
| Nov 13, 1:12 PM EST | Freeze Warning | MRX | 20 hr |
| Nov 14, 3:02 PM EST | Freeze Warning | MRX | 18 hr |
| Nov 17, 3:35 AM EST | Wind Advisory | MRX | 43 hr |
| Nov 18, 3:18 PM EST | Special Weather Statement | MRX | 42 min |
| Nov 30, 3:34 AM EST | Flood Watch | MRX | 59 hr |
| Dec 1, 10:43 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Dec 10, 3:44 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Dec 13, 3:53 AM EST | Wind Advisory | MRX | 36 hr |
| Dec 24, 3:09 PM EST | Flood Watch | MRX | 44 hr |
| Dec 25, 11:12 AM EST | Special Weather Statement | MRX | 48 min |
| Dec 25, 12:01 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Dec 25, 2:01 PM EST | Areal Flood Advisory | MRX | 6 hr |
| Dec 28, 3:14 AM EST | Wind Advisory | MRX | 23 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.