Alert archive / Tennessee / Blount County
Weather alerts in Blount County, Tennessee, 2020
186 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Blount County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 186
- Warnings
- 42
- Watches
- 26
- Advisories
- 73
- Busiest month
- April29 alerts
- Busiest day
- April 13, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Blount County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 9 | 36% | 12 | 50% | 17 min |
| Flash flood warnings | 4 | 3 | 25% | 5 | 100% | 48 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 13 | 5 | 62% | 6 | 83% | 6 min |
| NWS Morristown, TN: severe thunderstorm warnings | 158 | 129 | 18% | 243 | 81% | 21 min |
| NWS Morristown, TN: flash flood warnings | 22 | 18 | 18% | 33 | 82% | 42 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 1, 3:26 AM EST | Flood Watch | MRX | 64 hr |
| Jan 1, 3:17 PM EST | High Wind Watch | MRX | 24 hr |
| Jan 2, 3:08 PM EST | Wind Advisory | MRX | 13 hr |
| Jan 3, 4:56 AM EST | Areal Flood Advisory | MRX | 4 hr |
| Jan 4, 3:40 AM EST | Winter Weather Advisory | MRX | 27 hr |
| Jan 9, 3:22 AM EST | Wind Advisory | MRX | 28 hr |
| Jan 9, 9:01 PM EST | High Wind Watch | MRX | 18 hr |
| Jan 10, 2:39 PM EST | High Wind Warning | MRX | 34 hr |
| Jan 10, 2:39 PM EST | Wind Advisory | MRX | 34 hr |
| Jan 11, 1:42 PM EST | Tornado Watch | SPC | 7 hr |
| Jan 11, 4:16 PM EST | Mesoscale Discussion | SPC | 89 min |
| Jan 11, 4:50 PM EST | Severe Thunderstorm Warning | MRX | 40 min |
| Jan 11, 5:23 PM EST | Severe Thunderstorm Warning | MRX | 52 min |
| Jan 18, 3:10 AM EST | Wind Advisory | MRX | 22 hr |
| Jan 22, 3:28 PM EST | High Wind Watch | MRX | 12 hr |
| Jan 23, 3:12 AM EST | High Wind Warning | MRX | 37 hr |
| Jan 27, 3:20 AM EST | Winter Weather Advisory | MRX | 24 hr |
| Feb 4, 3:46 PM EST | Flash Flood Watch | MRX | 47 hr |
| Feb 5, 6:40 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 5, 10:31 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 5, 2:12 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 5, 2:42 PM EST | Wind Advisory | MRX | 18 hr |
| Feb 5, 5:18 PM EST | Areal Flood Warning | MRX | 27 hr |
| Feb 5, 10:14 PM EST | Special Weather Statement | MRX | 46 min |
| Feb 6, 3:21 PM EST | Winter Weather Advisory | MRX | 24 hr |
| Feb 6, 8:04 PM EST | Areal Flood Warning | MRX | 15 hr |
| Feb 7, 3:28 AM EST | Wind Advisory | MRX | 15 hr |
| Feb 7, 2:57 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Feb 9, 1:24 AM EST | Freezing Fog Advisory | MRX | 8 hr |
| Feb 9, 3:35 AM EST | Flood Watch | MRX | 36 hr |
| Feb 10, 3:14 AM EST | Wind Advisory | MRX | 23 hr |
| Feb 10, 3:14 PM EST | Flash Flood Watch | MRX | 24 hr |
| Feb 11, 3:11 PM EST | High Wind Warning | MRX | 36 hr |
| Feb 12, 3:03 AM EST | Flash Flood Watch | MRX | 31 hr |
| Feb 12, 9:22 PM EST | Severe Thunderstorm Warning | MRX | 53 min |
| Feb 12, 9:59 PM EST | Special Weather Statement | MRX | 61 min |
| Feb 19, 11:44 AM EST | Winter Weather Advisory | MRX | 34 hr |
| Feb 19, 3:05 PM EST | Winter Storm Warning | MRX | 31 hr |
| Feb 26, 3:31 AM EST | Winter Weather Advisory | MRX | 30 hr |
| Feb 26, 10:37 AM EST | Winter Storm Warning | MRX | 20 hr |
| Feb 27, 3:05 PM EST | Winter Weather Advisory | MRX | 44 hr |
| Feb 28, 2:50 PM EST | Winter Storm Warning | MRX | 20 hr |
| Mar 2, 10:20 AM EST | Wind Advisory | MRX | 8 hr |
| Mar 3, 6:36 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Mar 5, 3:21 PM EST | Winter Weather Advisory | MRX | 36 hr |
| Mar 10, 3:20 AM EDT | Wind Advisory | MRX | 12 hr |
| Mar 12, 3:39 AM EDT | Wind Advisory | MRX | 24 hr |
| Mar 18, 3:59 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Mar 23, 8:59 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Mar 24, 4:31 AM EDT | Flash Flood Watch | MRX | 23 hr |
| Mar 24, 10:39 PM EDT | Special Weather Statement | MRX | 36 min |
| Mar 29, 6:11 AM EDT | Severe Thunderstorm Warning | MRX | 36 min |
| Apr 8, 10:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 8, 11:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 9, 1:40 AM EDT | Special Weather Statement | MRX | 50 min |
| Apr 9, 2:09 AM EDT | Special Weather Statement | MRX | 51 min |
| Apr 10, 3:32 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 10, 3:32 PM EDT | High Wind Watch | MRX | 24 hr |
| Apr 11, 3:05 PM EDT | High Wind Warning | MRX | 40 hr |
| Apr 11, 9:32 PM EDT | Wind Advisory | MRX | 42 hr |
| Apr 11, 9:41 PM EDT | Flash Flood Watch | MRX | 32 hr |
| Apr 12, 8:57 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 12, 11:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 13, 12:43 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Apr 13, 1:00 AM EDT | Severe Thunderstorm Warning | MRX | 24 min |
| Apr 13, 1:14 AM EDT | Flash Flood Warning | MRX | 3 hr |
| Apr 13, 1:50 AM EDT | Areal Flood Warning | MRX | 3 hr |
| Apr 13, 5:22 AM EDT | Flash Flood Warning | MRX | 3 hr |
| Apr 13, 7:55 AM EDT | River Flood Warning | MRX | 17 hr |
| Apr 15, 3:24 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 21, 3:21 AM EDT | Frost Advisory | MRX | 31 hr |
| Apr 22, 3:16 PM EDT | High Wind Warning | MRX | 29 hr |
| Apr 23, 7:54 PM EDT | Wind Advisory | MRX | 6 hr |
| Apr 25, 3:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 25, 5:51 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Apr 25, 6:11 PM EDT | Tornado Watch | SPC | 4 hr |
| Apr 25, 7:14 PM EDT | Special Weather Statement | MRX | 46 min |
| Apr 25, 9:03 PM EDT | Special Weather Statement | MRX | 42 min |
| Apr 28, 2:58 PM EDT | Wind Advisory | MRX | 31 hr |
| Apr 28, 10:28 PM EDT | High Wind Warning | MRX | 24 hr |
| Apr 29, 5:45 PM EDT | Special Weather Statement | MRX | 45 min |
| May 5, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 6, 3:30 PM EDT | Frost Advisory | MRX | 18 hr |
| May 7, 3:51 AM EDT | Freeze Watch | MRX | 24 hr |
| May 7, 3:51 AM EDT | High Wind Watch | MRX | 24 hr |
| May 8, 3:56 AM EDT | Frost Advisory | MRX | 30 hr |
| May 8, 3:56 AM EDT | Freeze Warning | MRX | 30 hr |
| May 8, 3:56 AM EDT | Wind Advisory | MRX | 16 hr |
| May 9, 3:26 AM EDT | Frost Advisory | MRX | 31 hr |
| May 9, 3:26 AM EDT | Freeze Warning | MRX | 31 hr |
| May 11, 2:56 AM EDT | Frost Advisory | MRX | 29 hr |
| May 23, 2:58 AM EDT | Dense Fog Advisory | MRX | 7 hr |
| May 25, 2:35 PM EDT | Severe Thunderstorm Warning | MRX | 25 min |
| Jun 10, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 14, 12:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 15, 2:41 PM EDT | Special Weather Statement | MRX | 64 min |
| Jun 19, 3:18 PM EDT | Special Weather Statement | MRX | 27 min |
| Jun 19, 3:46 PM EDT | Special Weather Statement | MRX | 44 min |
| Jun 21, 2:58 PM EDT | Special Weather Statement | MRX | 32 min |
| Jun 21, 6:37 PM EDT | Special Weather Statement | MRX | 38 min |
| Jun 22, 1:49 PM EDT | Special Weather Statement | MRX | 41 min |
| Jun 22, 2:14 PM EDT | Severe Thunderstorm Warning | MRX | 35 min |
| Jun 22, 9:29 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 28, 12:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 5:58 PM EDT | Special Weather Statement | MRX | 47 min |
| Jun 29, 6:04 PM EDT | Severe Thunderstorm Warning | MRX | 26 min |
| Jun 29, 6:23 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 29, 6:44 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 29, 8:47 PM EDT | Flash Flood Warning | MRX | 3 hr |
| Jun 29, 11:36 PM EDT | Areal Flood Warning | MRX | 3 hr |
| Jul 1, 7:32 PM EDT | Areal Flood Advisory | MRX | 118 min |
| Jul 1, 8:27 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jul 1, 9:02 PM EDT | Flash Flood Warning | MRX | 84 min |
| Jul 5, 3:09 PM EDT | Special Weather Statement | MRX | 36 min |
| Jul 5, 3:15 PM EDT | Special Weather Statement | MRX | 45 min |
| Jul 9, 5:18 PM EDT | Special Weather Statement | MRX | 27 min |
| Jul 9, 5:43 PM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Jul 9, 5:47 PM EDT | Areal Flood Advisory | MRX | 66 min |
| Jul 17, 1:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 20, 12:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 8:04 PM EDT | Special Weather Statement | MRX | 41 min |
| Jul 20, 11:11 PM EDT | Special Weather Statement | MRX | 49 min |
| Jul 23, 1:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 3:16 PM EDT | Special Weather Statement | MRX | 44 min |
| Jul 24, 1:34 PM EDT | Special Weather Statement | MRX | 41 min |
| Jul 24, 3:11 PM EDT | Special Weather Statement | MRX | 49 min |
| Jul 24, 4:56 PM EDT | Severe Thunderstorm Warning | MRX | 52 min |
| Jul 24, 6:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 25, 2:39 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 25, 3:04 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 26, 6:22 PM EDT | Special Weather Statement | MRX | 38 min |
| Jul 31, 1:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 31, 5:50 PM EDT | Special Weather Statement | MRX | 25 min |
| Aug 3, 8:15 AM EDT | Special Weather Statement | MRX | 30 min |
| Aug 5, 7:12 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 6, 6:03 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Aug 10, 11:56 AM EDT | Special Weather Statement | MRX | 19 min |
| Aug 10, 2:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 15, 7:25 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 16, 4:41 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Aug 16, 11:35 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 21, 8:55 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 26, 4:59 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Aug 30, 10:37 PM EDT | Special Weather Statement | MRX | 53 min |
| Aug 30, 10:48 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Aug 30, 11:34 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 31, 12:18 AM EDT | Areal Flood Advisory | MRX | 117 min |
| Aug 31, 12:37 AM EDT | Areal Flood Advisory | MRX | 113 min |
| Sep 3, 2:41 PM EDT | Special Weather Statement | MRX | 49 min |
| Sep 3, 3:05 PM EDT | Special Weather Statement | MRX | 55 min |
| Sep 3, 3:24 PM EDT | Severe Thunderstorm Warning | MRX | 34 min |
| Sep 4, 6:36 PM EDT | Special Weather Statement | MRX | 39 min |
| Sep 27, 3:43 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Oct 15, 3:22 PM EDT | Freeze Watch | MRX | 24 hr |
| Oct 16, 3:12 AM EDT | Frost Advisory | MRX | 31 hr |
| Oct 16, 3:10 PM EDT | Freeze Warning | MRX | 19 hr |
| Oct 28, 3:52 AM EDT | Flash Flood Watch | MRX | 30 hr |
| Oct 28, 10:47 AM EDT | High Wind Watch | MRX | 5 hr |
| Oct 28, 10:47 AM EDT | Wind Advisory | MRX | 28 hr |
| Oct 28, 3:24 PM EDT | High Wind Warning | MRX | 21 hr |
| Oct 30, 3:18 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 30, 3:18 PM EDT | Freeze Watch | MRX | 37 hr |
| Nov 1, 3:16 AM EST | Freeze Warning | MRX | 30 hr |
| Nov 2, 2:39 PM EST | Freeze Warning | MRX | 18 hr |
| Nov 11, 2:05 PM EST | Flood Watch | MRX | 15 hr |
| Nov 14, 4:04 AM EST | Wind Advisory | MRX | 39 hr |
| Nov 14, 3:20 PM EST | High Wind Warning | MRX | 23 hr |
| Nov 24, 5:21 PM EST | Wind Advisory | MRX | 32 hr |
| Nov 28, 3:48 AM EST | High Wind Watch | MRX | 24 hr |
| Nov 29, 3:46 AM EST | Wind Advisory | MRX | 23 hr |
| Nov 29, 3:55 PM EST | Winter Storm Watch | MRX | 12 hr |
| Nov 30, 3:43 AM EST | Winter Storm Warning | MRX | 32 hr |
| Dec 6, 2:33 AM EST | Freezing Fog Advisory | MRX | 7 hr |
| Dec 6, 3:23 PM EST | Winter Weather Advisory | MRX | 33 hr |
| Dec 13, 5:28 AM EST | Dense Fog Advisory | MRX | 4 hr |
| Dec 21, 3:36 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Dec 22, 3:38 AM EST | High Wind Watch | MRX | 24 hr |
| Dec 23, 3:40 AM EST | High Wind Warning | MRX | 30 hr |
| Dec 23, 3:49 AM EST | Winter Storm Watch | MRX | 10 hr |
| Dec 23, 2:14 PM EST | Winter Storm Warning | MRX | 38 hr |
| Dec 23, 2:14 PM EST | Winter Weather Advisory | MRX | 38 hr |
| Dec 23, 11:37 PM EST | Wind Advisory | MRX | 10 hr |
| Dec 24, 3:45 AM EST | Wind Chill Advisory | MRX | 53 hr |
| Dec 25, 3:48 AM EST | Winter Weather Advisory | MRX | 11 hr |
| Dec 29, 1:41 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Dec 29, 10:30 PM EST | Wind Advisory | MRX | 21 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 archive20192021
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.