Alert archive / Tennessee / Henderson County

Weather alerts in Henderson County, Tennessee, 2011

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

Henderson County and its neighbors

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

Alerts: 239
Warnings: 88
Watches: 40
Advisories: 42
Busiest month: April70 alerts
Busiest day: April 27, 201121 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 10 tornado warnings covering Henderson County in 2011 had a tornado report inside them.

Henderson County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	10	1	90%	0
Severe thunderstorm warnings	43	22	49%	13	92%	34548 min
Flash flood warnings	15	4	73%	1	100%	166 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	182	41	77%	54	87%	27 min
NWS Memphis, TN: severe thunderstorm warnings	709	302	57%	807	76%	27668 min
NWS Memphis, TN: flash flood warnings	167	36	78%	92	77%	159 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Dec 31, 10:32 PM CST	Flash Flood Watch	MEG	5 hr
Dec 31, 11:51 PM CST	Flash Flood Warning	MEG	3 hr
Jan 7, 1:50 PM CST	Winter Storm Watch	MEG	32 hr
Jan 8, 2:24 PM CST	Winter Storm Warning	MEG	38 hr
Jan 10, 4:30 AM CST	Winter Weather Advisory	MEG	28 hr
Jan 19, 2:38 AM CST	Winter Weather Advisory	MEG	41 hr
Jan 20, 10:40 PM CST	Freezing Fog Advisory	MEG	10 hr
Jan 25, 3:46 AM CST	Winter Storm Warning	MEG	18 hr
Jan 25, 3:46 AM CST	Winter Weather Advisory	MEG	26 hr
Jan 31, 2:43 PM CST	Wind Advisory	MEG	39 hr
Feb 1, 3:26 PM CST	High Wind Warning	MEG	2 hr
Feb 3, 2:56 PM CST	Winter Weather Advisory	MEG	42 hr
Feb 4, 4:40 AM CST	Winter Weather Advisory	MEG	28 hr
Feb 6, 3:13 PM CST	Winter Weather Advisory	MEG	24 hr
Feb 8, 4:09 PM CST	Winter Storm Warning	MEG	30 hr
Feb 8, 4:09 PM CST	Winter Weather Advisory	MEG	20 hr
Feb 9, 10:03 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 9, 9:27 PM CST	Wind Chill Advisory	MEG	12 hr
Feb 10, 9:41 PM CST	Wind Chill Advisory	MEG	11 hr
Feb 23, 2:34 AM CST	Flash Flood Watch	MEG	46 hr
Feb 24, 2:12 PM CST	Mesoscale Discussion	SPC	93 min
Feb 24, 2:34 PM CST	Tornado Watch	SPC	7 hr
Feb 24, 2:55 PM CST	Tornado Warning	MEG	50 min
Feb 24, 3:42 PM CST	Tornado Warning	MEG	24 min
Feb 24, 5:26 PM CST	Mesoscale Discussion	SPC	94 min
Feb 24, 6:59 PM CST	Severe Thunderstorm Warning	MEG	90 days
Feb 24, 7:31 PM CST	Severe Thunderstorm Warning	MEG	44 min
Feb 24, 7:32 PM CST	Tornado Warning	MEG	43 min
Feb 24, 7:58 PM CST	Flash Flood Warning	MEG	3 hr
Feb 24, 8:11 PM CST	Severe Thunderstorm Warning	MEG	19 min
Feb 24, 8:12 PM CST	Tornado Warning	MEG	48 min
Feb 27, 12:44 PM CST	Mesoscale Discussion	SPC	91 min
Feb 28, 1:05 AM CST	Mesoscale Discussion	SPC	25 min
Feb 28, 1:33 AM CST	Tornado Watch	SPC	7 hr
Feb 28, 5:47 AM CST	Mesoscale Discussion	SPC	28 min
Feb 28, 6:35 AM CST	Tornado Warning	MEG	25 min
Feb 28, 12:06 PM CST	Wind Advisory	MEG	4 hr
Mar 4, 3:47 AM CST	Flash Flood Watch	MEG	36 hr
Mar 23, 10:23 AM CDT	Wind Advisory	MEG	9 hr
Mar 23, 1:40 PM CDT	Mesoscale Discussion	SPC	65 min
Mar 23, 4:06 PM CDT	Tornado Watch	SPC	6 hr
Mar 23, 4:37 PM CDT	Freeze Watch	MEG	11 hr
Mar 24, 3:41 AM CDT	Freeze Warning	MEG	28 hr
Mar 26, 2:01 AM CDT	Severe Thunderstorm Warning	MEG	61 days
Mar 26, 2:29 PM CDT	Special Weather Statement	MEG	31 min
Mar 26, 4:38 PM CDT	Special Weather Statement	MEG	37 min
Mar 26, 5:22 PM CDT	Mesoscale Discussion	SPC	83 min
Apr 2, 3:42 PM CDT	Wind Advisory	MEG	48 hr
Apr 4, 7:22 AM CDT	Tornado Watch	SPC	7 hr
Apr 4, 9:43 AM CDT	Severe Thunderstorm Warning	MEG	47 min
Apr 4, 10:35 AM CDT	Severe Thunderstorm Warning	MEG	26 min
Apr 4, 12:07 PM CDT	Severe Thunderstorm Warning	MEG	38 min
Apr 4, 12:40 PM CDT	Severe Thunderstorm Warning	MEG	35 min
Apr 4, 12:43 PM CDT	Tornado Warning	MEG	47 min
Apr 4, 3:51 PM CDT	Frost Advisory	MEG	12 hr
Apr 11, 4:43 AM CDT	Wind Advisory	MEG	12 hr
Apr 11, 8:58 AM CDT	Mesoscale Discussion	SPC	62 min
Apr 11, 10:31 AM CDT	Tornado Watch	SPC	6 hr
Apr 11, 12:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 14, 11:23 AM CDT	Wind Advisory	MEG	32 hr
Apr 15, 2:19 AM CDT	Tornado Watch	SPC	8 hr
Apr 15, 4:21 AM CDT	Mesoscale Discussion	SPC	84 min
Apr 15, 6:49 AM CDT	Severe Thunderstorm Warning	MEG	56 min
Apr 15, 12:29 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 15, 2:09 PM CDT	Tornado Watch	SPC	7 hr
Apr 15, 5:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 6:51 PM CDT	Severe Thunderstorm Warning	MEG	24 min
Apr 15, 8:15 PM CDT	Mesoscale Discussion	SPC	60 min
Apr 18, 4:04 PM CDT	Wind Advisory	MEG	27 hr
Apr 19, 9:39 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 19, 10:14 PM CDT	Tornado Watch	SPC	7 hr
Apr 19, 11:35 PM CDT	Severe Thunderstorm Warning	MEG	55 min
Apr 19, 11:56 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 20, 12:26 AM CDT	Severe Thunderstorm Warning	MEG	64 min
Apr 20, 1:12 AM CDT	Flash Flood Warning	MEG	3 hr
Apr 20, 1:26 AM CDT	Severe Thunderstorm Warning	MEG	49 min
Apr 20, 2:45 AM CDT	Severe Thunderstorm Warning	MEG	45 min
Apr 20, 3:05 AM CDT	Severe Thunderstorm Warning	MEG	55 min
Apr 23, 1:04 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 24, 2:38 PM CDT	Flash Flood Watch	MEG	3 days
Apr 25, 9:17 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 25, 1:34 PM CDT	Severe Thunderstorm Warning	MEG	41 min
Apr 25, 1:48 PM CDT	Mesoscale Discussion	SPC	87 min
Apr 25, 2:11 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Apr 25, 4:50 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 25, 11:05 PM CDT	Mesoscale Discussion	SPC	115 min
Apr 25, 11:11 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Apr 25, 11:35 PM CDT	Severe Thunderstorm Warning	MEG	40 min
Apr 25, 11:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 26, 12:13 AM CDT	Severe Thunderstorm Warning	MEG	47 min
Apr 26, 2:41 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 26, 3:02 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 26, 4:13 PM CDT	Wind Advisory	MEG	13 hr
Apr 26, 6:17 PM CDT	Mesoscale Discussion	SPC	118 min
Apr 26, 8:42 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Apr 26, 8:47 PM CDT	Tornado Warning	MEG	58 min
Apr 26, 9:13 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 26, 9:17 PM CDT	Tornado Warning	MEG	43 min
Apr 26, 9:45 PM CDT	Flash Flood Warning	MEG	6 hr
Apr 26, 9:52 PM CDT	Tornado Warning	MEG	38 min
Apr 26, 9:58 PM CDT	Tornado Watch	SPC	7 hr
Apr 27, 12:03 AM CDT	Severe Thunderstorm Warning	MEG	42 min
Apr 27, 2:26 AM CDT	Flash Flood Warning	MEG	4 hr
Apr 27, 7:46 AM CDT	Flash Flood Warning	MEG	6 hr
Apr 27, 11:32 AM CDT	Severe Thunderstorm Warning	MEG	28 min
Apr 27, 11:44 AM CDT	Severe Thunderstorm Warning	MEG	31 min
Apr 27, 11:56 AM CDT	Severe Thunderstorm Warning	MEG	34 min
Apr 27, 12:08 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 27, 12:13 PM CDT	Severe Thunderstorm Warning	MEG	17 min
Apr 27, 12:42 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 27, 1:56 PM CDT	Flash Flood Warning	MEG	3 hr
Apr 27, 2:58 PM CDT	Wind Advisory	MEG	6 hr
Apr 27, 3:06 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 27, 3:29 PM CDT	Tornado Watch	SPC	5 hr
Apr 27, 4:59 PM CDT	Areal Flood Warning	MEG	66 hr
Apr 29, 3:39 PM CDT	Flash Flood Watch	MEG	4 days
Apr 30, 11:16 AM CDT	Areal Flood Warning	MEG	24 hr
May 1, 3:50 AM CDT	Mesoscale Discussion	SPC	2 hr
May 1, 4:47 AM CDT	Flash Flood Warning	MEG	9 hr
May 1, 12:47 PM CDT	Tornado Watch	SPC	8 hr
May 1, 3:18 PM CDT	Mesoscale Discussion	SPC	87 min
May 1, 3:56 PM CDT	Severe Thunderstorm Warning	MEG	49 min
May 1, 3:59 PM CDT	Flash Flood Warning	MEG	3 hr
May 1, 5:43 PM CDT	Mesoscale Discussion	SPC	92 min
May 2, 4:20 PM CDT	Areal Flood Warning	MEG	72 hr
May 3, 12:13 AM CDT	Flash Flood Warning	MEG	6 hr
May 3, 1:40 AM CDT	Flash Flood Warning	MEG	8 hr
May 5, 3:47 PM CDT	Areal Flood Warning	MEG	24 hr
May 6, 3:23 PM CDT	Areal Flood Warning	MEG	48 hr
May 12, 2:51 PM CDT	Mesoscale Discussion	SPC	114 min
May 13, 12:31 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 4:33 PM CDT	Severe Thunderstorm Warning	MEG	57 min
May 13, 5:21 PM CDT	Severe Thunderstorm Warning	MEG	37 min
May 22, 7:03 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 23, 4:24 PM CDT	Mesoscale Discussion	SPC	96 min
May 23, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 23, 6:13 PM CDT	Severe Thunderstorm Warning	MEG	47 min
May 23, 7:39 PM CDT	Severe Thunderstorm Warning	MEG	21 min
May 23, 7:47 PM CDT	Mesoscale Discussion	SPC	58 min
May 25, 10:18 AM CDT	Mesoscale Discussion	SPC	57 min
May 25, 11:52 AM CDT	Mesoscale Discussion	SPC	83 min
May 25, 12:28 PM CDT	Tornado Watch PDS	SPC	8 hr
May 25, 5:56 PM CDT	Mesoscale Discussion	SPC	64 min
May 25, 6:18 PM CDT	Severe Thunderstorm Warning	MEG	42 min
May 25, 7:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 25, 8:33 PM CDT	Tornado Watch	SPC	7 hr
May 25, 9:31 PM CDT	Tornado Warning	MEG	44 min
May 25, 9:41 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Jun 3, 11:20 AM CDT	Heat Advisory	MEG	52 hr
Jun 15, 10:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 11:52 AM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 15, 3:12 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Jun 15, 3:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jun 16, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 16, 6:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 16, 7:59 PM CDT	Severe Thunderstorm Warning	MEG	61 min
Jun 16, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 16, 9:02 PM CDT	Severe Thunderstorm Warning	MEG	28 min
Jun 16, 9:28 PM CDT	Flash Flood Warning	MEG	3 hr
Jun 17, 8:44 AM CDT	Severe Thunderstorm Warning	MEG	46 min
Jun 17, 9:29 AM CDT	Flash Flood Warning	MEG	3 hr
Jun 18, 8:38 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 18, 9:39 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 18, 11:42 AM CDT	Severe Thunderstorm Warning	MEG	63 min
Jun 18, 11:59 AM CDT	Flash Flood Warning	MEG	5 hr
Jun 21, 1:09 PM CDT	Flash Flood Warning	MEG	3 hr
Jun 22, 11:57 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 1:29 PM CDT	Special Weather Statement	MEG	61 min
Jun 22, 3:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 25, 2:59 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 26, 11:13 AM CDT	Special Weather Statement	MEG	47 min
Jun 26, 12:05 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 26, 12:16 PM CDT	Special Weather Statement	MEG	29 min
Jun 26, 2:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 26, 5:29 PM CDT	Mesoscale Discussion	SPC	46 min
Jun 27, 11:30 AM CDT	Mesoscale Discussion	SPC	90 min
Jun 28, 4:08 AM CDT	Mesoscale Discussion	SPC	82 min
Jun 28, 4:17 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 28, 9:11 AM CDT	Severe Thunderstorm Warning	MEG	49 min
Jun 28, 10:00 AM CDT	Severe Thunderstorm Warning	MEG	45 min
Jul 4, 12:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 4, 1:04 PM CDT	Special Weather Statement	MEG	26 min
Jul 4, 1:29 PM CDT	Special Weather Statement	MEG	31 min
Jul 4, 2:12 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Jul 8, 1:20 AM CDT	Mesoscale Discussion	SPC	115 min
Jul 8, 3:42 PM CDT	Heat Advisory	MEG	46 hr
Jul 10, 4:20 AM CDT	Excessive Heat Warning	MEG	3 days
Jul 12, 4:17 AM CDT	Heat Advisory	MEG	55 hr
Jul 12, 7:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 14, 1:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 18, 3:11 PM CDT	Heat Advisory	MEG	6 days
Jul 21, 5:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 4:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 26, 3:16 PM CDT	Heat Advisory	MEG	51 hr
Jul 30, 2:26 PM CDT	Heat Advisory	MEG	3 days
Aug 1, 3:06 AM CDT	Excessive Heat Watch	MEG	4 days
Aug 2, 3:55 AM CDT	Excessive Heat Warning	MEG	5 days
Aug 4, 12:23 AM CDT	Severe Thunderstorm Warning	MEG	29 min
Aug 4, 12:38 AM CDT	Severe Thunderstorm Warning	MEG	52 min
Aug 4, 1:25 AM CDT	Mesoscale Discussion	SPC	95 min
Aug 4, 8:06 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 4, 10:21 AM CDT	Mesoscale Discussion	SPC	84 min
Aug 5, 2:59 PM CDT	Excessive Heat Warning	MEG	3 days
Aug 6, 4:12 AM CDT	Heat Advisory	MEG	63 hr
Aug 7, 10:58 PM CDT	Wind Advisory	MEG	2 hr
Aug 10, 3:26 PM CDT	Severe Thunderstorm Warning	MEG	37 min
Aug 18, 2:38 AM CDT	Heat Advisory	MEG	13 hr
Sep 4, 2:19 PM CDT	Wind Advisory	MEG	30 hr
Sep 11, 5:00 PM CDT	Mesoscale Discussion	SPC	90 min
Sep 11, 5:47 PM CDT	Special Weather Statement	MEG	28 min
Sep 11, 6:14 PM CDT	Special Weather Statement	MEG	31 min
Sep 14, 12:44 PM CDT	Mesoscale Discussion	SPC	91 min
Sep 14, 8:09 PM CDT	Special Weather Statement	MEG	51 min
Sep 21, 4:16 AM CDT	Dense Fog Advisory	MEG	6 hr
Oct 2, 3:31 PM CDT	Frost Advisory	MEG	16 hr
Oct 12, 5:35 AM CDT	Dense Fog Advisory	MEG	3 hr
Oct 19, 3:12 PM CDT	Freeze Watch	MEG	20 hr
Oct 20, 11:01 AM CDT	Freeze Warning	MEG	22 hr
Oct 21, 3:44 AM CDT	Freeze Watch	MEG	12 hr
Oct 21, 3:22 PM CDT	Freeze Warning	MEG	18 hr
Oct 24, 3:11 AM CDT	Dense Fog Advisory	MEG	8 hr
Oct 25, 3:39 AM CDT	Dense Fog Advisory	MEG	5 hr
Oct 28, 3:37 PM CDT	Freeze Watch	MEG	24 hr
Oct 28, 3:37 PM CDT	Freeze Warning	MEG	18 hr
Oct 29, 3:20 PM CDT	Freeze Warning	MEG	18 hr
Oct 31, 3:40 PM CDT	Freeze Warning	MEG	17 hr
Nov 4, 11:09 PM CDT	Dense Fog Advisory	MEG	11 hr
Nov 12, 2:50 PM CST	Wind Advisory	MEG	27 hr
Nov 19, 3:25 PM CST	Flash Flood Watch	MEG	65 hr
Nov 21, 3:32 AM CST	Special Weather Statement	MEG	28 min
Nov 21, 3:40 AM CST	Mesoscale Discussion	SPC	95 min
Nov 24, 9:08 PM CST	Dense Fog Advisory	MEG	12 hr
Nov 28, 3:36 AM CST	Winter Weather Advisory	MEG	32 hr
Nov 28, 3:51 PM CST	Mesoscale Discussion	SPC	4 hr
Nov 28, 4:17 PM CST	Winter Storm Warning	MEG	20 hr
Dec 2, 3:29 PM CST	Flood Watch	MEG	72 hr
Dec 6, 6:44 PM CST	Winter Weather Advisory	MEG	17 hr
Dec 8, 4:12 AM CST	Freezing Fog Advisory	MEG	5 hr
Dec 13, 9:13 PM CST	Dense Fog Advisory	MEG	11 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	44
Tornado Warning	10
Severe Thunderstorm Watch	12
Tornado Watch	15
Mesoscale Discussion	58
Special Weather Statement	11
Flooding
Areal Flood Warning	5
Flash Flood Warning	15
Flash Flood Watch	6
Flood Watch	1
Winter
Winter Storm Warning	4
Winter Storm Watch	1
Winter Weather Advisory	9
Heat
Excessive Heat Warning	3
Excessive Heat Watch	1
Heat Advisory	8
Cold
Freeze Warning	6
Freeze Watch	4
Frost Advisory	2
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
Wind Advisory	12
Fog and smoke
Dense Fog Advisory	7
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 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.