Alert archive / Tennessee / Unicoi County

Weather alerts in Unicoi County, Tennessee, 2011

155 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Unicoi County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 155
Warnings: 36
Watches: 37
Advisories: 38
Busiest month: April35 alerts
Busiest day: April 9, 20118 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Unicoi County in 2011 had a tornado report inside them.

Unicoi County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	0
Severe thunderstorm warnings	19	18	5%	5	80%	18 min
Flash flood warnings	1	1	0%	1	100%	37 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Morristown, TN: tornado warnings	100	27	73%	46	93%	26 min
NWS Morristown, TN: severe thunderstorm warnings	400	287	28%	533	78%	23 min
NWS Morristown, TN: flash flood warnings	23	12	48%	20	95%	84 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 5, 3:29 PM EST	Winter Weather Advisory	MRX	16 hr
Jan 6, 2:50 PM EST	Winter Storm Warning	MRX	49 hr
Jan 8, 3:30 AM EST	Winter Storm Watch	MRX	36 hr
Jan 9, 3:25 AM EST	Winter Storm Warning	MRX	36 hr
Jan 9, 3:20 PM EST	Winter Weather Advisory	MRX	4 days
Jan 20, 11:23 AM EST	Winter Weather Advisory	MRX	16 hr
Jan 25, 3:51 AM EST	Winter Storm Watch	MRX	12 hr
Jan 25, 3:14 PM EST	Winter Storm Warning	MRX	28 hr
Jan 31, 3:09 PM EST	High Wind Watch	MRX	13 hr
Feb 1, 3:59 AM EST	High Wind Warning	MRX	31 hr
Feb 7, 8:17 PM EST	Winter Weather Advisory	MRX	7 hr
Feb 9, 3:10 AM EST	Winter Weather Advisory	MRX	24 hr
Feb 14, 3:10 AM EST	Wind Advisory	MRX	18 hr
Feb 23, 9:32 PM EST	High Wind Watch	MRX	17 hr
Feb 24, 2:16 PM EST	High Wind Warning	MRX	20 hr
Feb 24, 2:16 PM EST	Wind Advisory	MRX	25 hr
Feb 25, 1:48 AM EST	Mesoscale Discussion	SPC	27 min
Feb 27, 4:20 AM EST	Wind Advisory	MRX	36 hr
Feb 27, 8:21 PM EST	Dense Fog Advisory	MRX	8 hr
Feb 28, 6:59 AM EST	Tornado Watch	SPC	7 hr
Feb 28, 12:25 PM EST	Mesoscale Discussion	SPC	95 min
Feb 28, 1:29 PM EST	Tornado Watch	SPC	7 hr
Mar 4, 3:32 PM EST	Wind Advisory	MRX	30 hr
Mar 5, 4:03 AM EST	Flood Watch	MRX	35 hr
Mar 6, 8:35 AM EST	Winter Weather Advisory	MRX	7 hr
Mar 6, 10:32 AM EST	Areal Flood Advisory	MRX	3 hr
Mar 8, 3:16 AM EST	Wind Advisory	MRX	42 hr
Mar 8, 3:24 AM EST	Flood Watch	MRX	36 hr
Mar 9, 11:11 AM EST	Winter Storm Watch	MRX	17 hr
Mar 9, 11:44 AM EST	Areal Flood Advisory	MRX	3 hr
Mar 10, 4:19 AM EST	Winter Storm Warning	MRX	30 hr
Mar 10, 8:42 AM EST	Areal Flood Advisory	MRX	4 hr
Mar 23, 3:38 PM EDT	Mesoscale Discussion	SPC	37 min
Mar 23, 3:45 PM EDT	Tornado Watch	SPC	6 hr
Mar 23, 4:48 PM EDT	Mesoscale Discussion	SPC	57 min
Mar 23, 7:10 PM EDT	Mesoscale Discussion	SPC	65 min
Mar 23, 8:36 PM EDT	Severe Thunderstorm Warning	MRX	54 min
Mar 23, 8:39 PM EDT	Mesoscale Discussion	SPC	66 min
Mar 23, 9:29 PM EDT	Severe Thunderstorm Warning	MRX	46 min
Mar 23, 9:41 PM EDT	Tornado Watch	SPC	2 hr
Mar 31, 9:24 AM EDT	Winter Weather Advisory	MRX	5 hr
Apr 1, 2:59 PM EDT	Wind Advisory	MRX	31 hr
Apr 3, 4:13 AM EDT	Wind Advisory	MRX	43 hr
Apr 4, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 4, 6:00 PM EDT	Mesoscale Discussion	SPC	90 min
Apr 5, 12:00 AM EDT	Areal Flood Advisory	MRX	4 hr
Apr 8, 6:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 8, 7:35 PM EDT	Mesoscale Discussion	SPC	55 min
Apr 9, 1:59 AM EDT	Severe Thunderstorm Warning	MRX	61 min
Apr 9, 12:34 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 9, 2:00 PM EDT	Tornado Watch	SPC	7 hr
Apr 9, 4:21 PM EDT	Mesoscale Discussion	SPC	84 min
Apr 9, 4:57 PM EDT	Severe Thunderstorm Warning	MRX	63 min
Apr 9, 5:58 PM EDT	Tornado Warning	MRX	47 min
Apr 9, 6:44 PM EDT	Severe Thunderstorm Warning	MRX	46 min
Apr 9, 7:13 PM EDT	Flash Flood Warning	MRX	3 hr
Apr 11, 3:47 AM EDT	Wind Advisory	MRX	16 hr
Apr 11, 7:42 PM EDT	Mesoscale Discussion	SPC	33 min
Apr 11, 8:08 PM EDT	Tornado Watch	SPC	7 hr
Apr 12, 2:39 AM EDT	Mesoscale Discussion	SPC	36 min
Apr 12, 10:39 AM EDT	Wind Advisory	MRX	8 hr
Apr 13, 3:20 PM EDT	Frost Advisory	MRX	18 hr
Apr 14, 4:15 AM EDT	High Wind Watch	MRX	22 hr
Apr 15, 2:43 AM EDT	High Wind Warning	MRX	27 hr
Apr 16, 10:46 AM EDT	Wind Advisory	MRX	10 hr
Apr 20, 2:42 AM EDT	Tornado Watch	SPC	5 hr
Apr 26, 3:30 PM EDT	Wind Advisory	MRX	35 hr
Apr 27, 3:07 PM EDT	High Wind Warning	MRX	11 hr
Apr 27, 3:22 PM EDT	Mesoscale Discussion	SPC	83 min
Apr 27, 4:36 PM EDT	Tornado Watch PDS	SPC	8 hr
Apr 27, 10:50 PM EDT	Tornado Warning	MRX	40 min
Apr 28, 12:09 AM EDT	Mesoscale Discussion	SPC	36 min
Apr 28, 12:19 AM EDT	Severe Thunderstorm Warning	MRX	56 min
Apr 28, 12:40 AM EDT	Tornado Warning	MRX	31 min
Apr 28, 12:41 AM EDT	Tornado Watch	SPC	7 hr
Apr 28, 1:29 AM EDT	Areal Flood Advisory	MRX	3 hr
May 3, 3:18 PM EDT	Freeze Watch	MRX	19 hr
May 4, 10:14 AM EDT	Hard Freeze Warning	MRX	23 hr
May 10, 11:21 AM EDT	Mesoscale Discussion	SPC	114 min
May 10, 2:18 PM EDT	Mesoscale Discussion	SPC	87 min
May 10, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 10, 6:02 PM EDT	Mesoscale Discussion	SPC	58 min
May 10, 9:01 PM EDT	Mesoscale Discussion	SPC	59 min
May 10, 10:18 PM EDT	Mesoscale Discussion	SPC	27 min
May 10, 10:33 PM EDT	Severe Thunderstorm Warning	MRX	42 min
May 10, 10:42 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
May 10, 11:17 PM EDT	Severe Thunderstorm Warning	MRX	43 min
May 11, 12:14 AM EDT	Mesoscale Discussion	SPC	61 min
May 11, 2:37 AM EDT	Mesoscale Discussion	SPC	23 min
May 12, 4:28 PM EDT	Mesoscale Discussion	SPC	2 hr
May 13, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 3:41 PM EDT	Severe Thunderstorm Warning	MRX	64 min
May 13, 3:47 PM EDT	Mesoscale Discussion	SPC	58 min
May 13, 4:10 PM EDT	Severe Thunderstorm Warning	MRX	65 min
May 22, 2:18 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 22, 4:44 PM EDT	Mesoscale Discussion	SPC	61 min
May 22, 7:26 PM EDT	Mesoscale Discussion	SPC	2 hr
May 24, 7:01 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 24, 8:34 AM EDT	Mesoscale Discussion	SPC	116 min
May 24, 1:57 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 24, 3:33 PM EDT	Mesoscale Discussion	SPC	87 min
May 24, 7:46 PM EDT	Mesoscale Discussion	SPC	59 min
May 25, 7:10 PM EDT	Wind Advisory	MRX	15 hr
May 26, 10:15 AM EDT	Severe Thunderstorm Watch	SPC	9 hr
May 26, 1:47 PM EDT	Severe Thunderstorm Warning	MRX	43 min
May 26, 3:32 PM EDT	Mesoscale Discussion	SPC	58 min
May 26, 4:36 PM EDT	Mesoscale Discussion	SPC	84 min
May 26, 5:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 1, 4:35 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 5, 5:39 PM EDT	Severe Thunderstorm Warning	MRX	36 min
Jun 5, 6:34 PM EDT	Severe Thunderstorm Warning	MRX	26 min
Jun 5, 7:05 PM EDT	Severe Thunderstorm Warning	MRX	40 min
Jun 7, 6:04 PM EDT	Mesoscale Discussion	SPC	116 min
Jun 9, 1:10 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 11, 1:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 15, 12:52 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 18, 11:05 AM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 19, 11:17 AM EDT	Flash Flood Watch	MRX	19 hr
Jun 19, 12:22 PM EDT	Severe Thunderstorm Warning	MRX	39 min
Jun 20, 9:53 AM EDT	Mesoscale Discussion	SPC	97 min
Jun 20, 12:46 PM EDT	Mesoscale Discussion	SPC	59 min
Jun 21, 2:11 PM EDT	Mesoscale Discussion	SPC	64 min
Jun 21, 8:54 PM EDT	Severe Thunderstorm Warning	MRX	66 min
Jun 22, 5:10 PM EDT	Severe Thunderstorm Warning	MRX	50 min
Jun 22, 8:08 PM EDT	Severe Thunderstorm Warning	MRX	36 min
Jun 27, 4:17 PM EDT	Mesoscale Discussion	SPC	88 min
Jun 28, 2:44 PM EDT	Mesoscale Discussion	SPC	91 min
Jul 4, 12:10 PM EDT	Mesoscale Discussion	SPC	95 min
Jul 4, 12:50 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 3, 10:01 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 8, 3:57 PM EDT	Severe Thunderstorm Warning	MRX	63 min
Aug 12, 1:46 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 14, 1:50 PM EDT	Mesoscale Discussion	SPC	55 min
Aug 14, 2:07 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 18, 2:59 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 2, 2:31 PM EDT	Mesoscale Discussion	SPC	59 min
Sep 3, 2:21 PM EDT	Special Weather Statement	GSP	39 min
Sep 4, 3:13 AM EDT	Flash Flood Watch	MRX	60 hr
Sep 5, 12:32 PM EDT	River Flood Warning	MRX	31 hr
Sep 10, 4:55 AM EDT	Dense Fog Advisory	MRX	5 hr
Sep 22, 5:43 AM EDT	Dense Fog Advisory	MRX	3 hr
Oct 2, 3:04 PM EDT	Frost Advisory	MRX	19 hr
Oct 18, 3:51 AM EDT	Wind Advisory	MRX	13 hr
Oct 20, 2:23 AM EDT	Wind Advisory	MRX	12 hr
Oct 20, 3:48 PM EDT	Freeze Watch	MRX	12 hr
Oct 20, 3:48 PM EDT	Freeze Warning	MRX	12 hr
Oct 21, 3:56 AM EDT	Freeze Warning	MRX	29 hr
Nov 5, 3:07 AM EDT	Dense Fog Advisory	MRX	8 hr
Nov 27, 9:30 AM EST	Wind Advisory	MRX	43 hr
Nov 29, 3:27 AM EST	Winter Weather Advisory	MRX	24 hr
Dec 6, 3:43 PM EST	Winter Weather Advisory	MRX	28 hr
Dec 26, 3:05 PM EST	Wind Advisory	MRX	12 hr
Dec 27, 3:23 AM EST	High Wind Warning	MRX	7 hr
Dec 27, 3:23 AM EST	Wind Advisory	MRX	15 hr
Dec 27, 3:35 AM EST	Winter Weather Advisory	MRX	30 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	19
Tornado Warning	3
Severe Thunderstorm Watch	16
Tornado Watch	9
Mesoscale Discussion	43
Special Weather Statement	1
Flooding
Flash Flood Warning	1
River Flood Warning	1
Flash Flood Watch	2
Flood Watch	2
Areal Flood Advisory	5
Winter
Winter Storm Warning	4
Winter Storm Watch	3
Winter Weather Advisory	10
Cold
Freeze Warning	2
Hard Freeze Warning	1
Freeze Watch	2
Frost Advisory	2
Wind and dust
High Wind Warning	5
High Wind Watch	3
Wind Advisory	17
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.