Alert archive / Tennessee / Sevier County

Weather alerts in Sevier County, Tennessee, 2020

172 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sevier County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 172
Warnings: 40
Watches: 23
Advisories: 69
Busiest month: April25 alerts
Busiest day: April 13, 20207 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Sevier County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	12	11	8%	6	83%	30 min
Flash flood warnings	4	2	50%	2	50%	43 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, 3:17 PM EST	High Wind Watch	MRX	24 hr
Jan 2, 3:08 PM EST	Wind Advisory	MRX	13 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, 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, 9:14 PM EST	River Flood Warning	MRX	28 hr
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, 11:32 AM EST	Areal Flood Advisory	MRX	3 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, 9:59 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 3, 8:39 AM EST	Areal Flood Advisory	MRX	111 min
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 29, 6:11 AM EDT	Severe Thunderstorm Warning	MRX	36 min
Apr 8, 11:16 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
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, 11:17 PM EDT	Mesoscale Discussion	SPC	88 min
Apr 13, 12:43 AM EDT	Areal Flood Advisory	MRX	3 hr
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, 1:58 AM EDT	Areal Flood Advisory	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	26 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, 6:11 PM EDT	Tornado Watch	SPC	4 hr
Apr 25, 6:29 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 24, 2:30 PM EDT	Special Weather Statement	MRX	30 min
Jun 4, 3:11 PM EDT	Special Weather Statement	MRX	49 min
Jun 10, 6:23 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 14, 12:34 PM EDT	Mesoscale Discussion	SPC	116 min
Jun 14, 1:00 PM EDT	Severe Thunderstorm Warning	MRX	34 min
Jun 15, 11:23 AM EDT	Special Weather Statement	MRX	52 min
Jun 15, 12:19 PM EDT	Special Weather Statement	MRX	41 min
Jun 15, 12:24 PM EDT	Special Weather Statement	MRX	51 min
Jun 15, 1:01 PM EDT	Special Weather Statement	MRX	59 min
Jun 15, 1:25 PM EDT	Severe Thunderstorm Warning	MRX	50 min
Jun 21, 3:43 PM EDT	Severe Thunderstorm Warning	MRX	47 min
Jun 21, 7:13 PM EDT	Special Weather Statement	MRX	47 min
Jun 21, 8:03 PM EDT	Special Weather Statement	MRX	42 min
Jun 22, 2:54 PM EDT	Special Weather Statement	MRX	51 min
Jun 28, 12:49 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 4:03 PM EDT	Special Weather Statement	MRX	42 min
Jun 29, 6:23 PM EDT	Areal Flood Advisory	MRX	3 hr
Jun 29, 6:30 PM EDT	Special Weather Statement	MRX	45 min
Jun 29, 6:44 PM EDT	Severe Thunderstorm Warning	MRX	46 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, 1:51 PM EDT	Special Weather Statement	MRX	39 min
Jul 5, 4:15 PM EDT	Severe Thunderstorm Warning	MRX	45 min
Jul 16, 7:21 PM EDT	Special Weather Statement	MRX	24 min
Jul 17, 1:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jul 18, 7:15 PM EDT	Special Weather Statement	MRX	45 min
Jul 19, 6:11 PM EDT	Special Weather Statement	MRX	49 min
Jul 20, 12:57 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 11:58 PM EDT	Special Weather Statement	MRX	32 min
Jul 21, 1:00 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 1:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 3:59 PM EDT	Severe Thunderstorm Warning	MRX	46 min
Jul 23, 4:06 PM EDT	Special Weather Statement	MRX	54 min
Jul 24, 12:11 PM EDT	Areal Flood Advisory	MRX	2 hr
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, 2:43 PM EDT	Special Weather Statement	MRX	32 min
Jul 25, 3:04 PM EDT	Areal Flood Advisory	MRX	3 hr
Jul 25, 3:42 PM EDT	Flash Flood Warning	MRX	2 hr
Jul 27, 5:39 PM EDT	Areal Flood Advisory	MRX	2 hr
Jul 31, 1:21 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 31, 6:16 PM EDT	Severe Thunderstorm Warning	MRX	29 min
Aug 6, 2:44 PM EDT	Special Weather Statement	MRX	46 min
Aug 6, 6:03 PM EDT	Areal Flood Advisory	MRX	117 min
Aug 15, 9:02 AM EDT	Areal Flood Advisory	MRX	3 hr
Aug 16, 4:41 AM EDT	Dense Fog Advisory	MRX	5 hr
Aug 21, 8:14 PM EDT	Special Weather Statement	MRX	46 min
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 29, 8:15 PM EDT	Special Weather Statement	MRX	45 min
Aug 30, 11:34 PM EDT	Areal Flood Advisory	MRX	3 hr
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 27, 3:43 AM EDT	Dense Fog Advisory	MRX	6 hr
Oct 2, 3:07 PM EDT	Frost Advisory	MRX	18 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 29, 6:00 AM EDT	Areal Flood Advisory	MRX	3 hr
Oct 29, 6:54 AM EDT	Areal Flood Advisory	MRX	6 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.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	12
Severe Thunderstorm Watch	1
Tornado Watch	2
Mesoscale Discussion	13
Special Weather Statement	27
Flooding
Areal Flood Warning	3
Flash Flood Warning	4
River Flood Warning	2
Flash Flood Watch	5
Flood Watch	2
Areal Flood Advisory	17
Winter
Winter Storm Warning	5
Winter Storm Watch	2
Winter Weather Advisory	11
Cold
Freeze Warning	5
Freeze Watch	3
Frost Advisory	10
Wind Chill Advisory	1
Wind and dust
High Wind Warning	9
High Wind Watch	8
Wind Advisory	20
Fog and smoke
Dense Fog Advisory	8
Freezing Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.