Alert archive / Tennessee / Henderson County

Weather alerts in Henderson County, Tennessee, 2008

158 weather alerts in 2008, 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 2008. Tap one for its archive.

Alerts: 158
Warnings: 47
Watches: 24
Advisories: 48
Busiest month: May29 alerts
Busiest day: February 6, 20089 alerts

Over time

By month

Warning verification

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

3 of 7 tornado warnings covering Henderson County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 29 minutes after it went out.

Henderson County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	3	57%	1	100%	29 min
Severe thunderstorm warnings	14	5	64%	1	0%
Flash flood warnings	17	8	53%	2	50%	98 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	147	50	66%	97	97%	22 min
NWS Memphis, TN: severe thunderstorm warnings	419	196	53%	381	69%	20 min
NWS Memphis, TN: flash flood warnings	155	76	51%	124	83%	93 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
Jan 1, 4:23 AM CST	Wind Advisory	MEG	14 hr
Jan 7, 9:18 PM CST	Wind Advisory	MEG	25 hr
Jan 8, 1:11 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 8, 1:26 PM CST	Tornado Watch	SPC	8 hr
Jan 8, 4:03 PM CST	Mesoscale Discussion	SPC	117 min
Jan 8, 4:42 PM CST	Severe Thunderstorm Warning	MEG	48 min
Jan 8, 6:17 PM CST	Flash Flood Warning	MEG	3 hr
Jan 10, 7:17 AM CST	Mesoscale Discussion	SPC	118 min
Jan 10, 7:46 AM CST	Tornado Watch	SPC	8 hr
Jan 10, 10:24 AM CST	Severe Thunderstorm Warning	MEG	36 min
Jan 21, 3:01 PM CST	Winter Weather Advisory	MEG	13 hr
Jan 26, 1:31 AM CST	Freezing Rain Advisory	MEG	8 hr
Jan 26, 11:32 PM CST	Freezing Fog Advisory	MEG	10 hr
Jan 28, 3:04 PM CST	Wind Advisory	MEG	26 hr
Jan 29, 3:14 PM CST	High Wind Warning	MEG	5 hr
Jan 29, 7:56 PM CST	Wind Advisory	MEG	3 hr
Jan 30, 4:07 PM CST	Winter Weather Advisory	MEG	32 hr
Feb 4, 2:53 PM CST	Wind Advisory	MEG	33 hr
Feb 5, 9:47 AM CST	Mesoscale Discussion	SPC	88 min
Feb 5, 3:09 PM CST	Tornado Watch PDS	SPC	9 hr
Feb 5, 5:15 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 5, 7:07 PM CST	Tornado Warning Emergency	MEG	38 min
Feb 5, 7:25 PM CST	Tornado Warning	MEG	35 min
Feb 5, 7:39 PM CST	Severe Thunderstorm Warning	MEG	36 min
Feb 5, 8:05 PM CST	Tornado Warning	MEG	25 min
Feb 5, 8:07 PM CST	Mesoscale Discussion	SPC	83 min
Feb 5, 8:27 PM CST	Tornado Warning	MEG	33 min
Feb 5, 10:01 PM CST	Tornado Watch	SPC	8 hr
Feb 5, 10:49 PM CST	Tornado Warning	MEG	41 min
Feb 5, 11:04 PM CST	Severe Thunderstorm Warning	MEG	56 min
Feb 12, 1:28 PM CST	Winter Weather Advisory	MEG	8 hr
Feb 16, 1:37 PM CST	Wind Advisory	MEG	28 hr
Feb 20, 3:24 PM CST	Freezing Rain Advisory	MEG	21 hr
Feb 22, 10:37 PM CST	Winter Weather Advisory	MEG	5 hr
Feb 26, 3:30 AM CST	Wind Advisory	MEG	15 hr
Feb 29, 9:22 PM CST	Dense Fog Advisory	MEG	10 hr
Mar 3, 4:17 AM CST	Wind Advisory	MEG	14 hr
Mar 5, 3:00 PM CST	Winter Storm Watch	MEG	25 hr
Mar 6, 4:36 AM CST	Winter Storm Warning	MEG	49 hr
Mar 14, 1:34 AM CDT	Mesoscale Discussion	SPC	86 min
Mar 14, 11:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 15, 10:23 AM CDT	Mesoscale Discussion	SPC	67 min
Mar 18, 4:44 AM CDT	Wind Advisory	MEG	26 hr
Mar 18, 10:51 PM CDT	Tornado Watch	SPC	8 hr
Mar 18, 11:42 PM CDT	Mesoscale Discussion	SPC	63 min
Mar 19, 1:13 AM CDT	Mesoscale Discussion	SPC	62 min
Mar 19, 1:35 AM CDT	Severe Thunderstorm Warning	MEG	55 min
Mar 19, 2:01 AM CDT	Severe Thunderstorm Warning	MEG	44 min
Mar 25, 11:38 AM CDT	Red Flag Warning	MEG	7 hr
Mar 27, 8:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 30, 2:34 PM CDT	Flash Flood Watch	MEG	36 hr
Mar 31, 9:12 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 1, 3:09 PM CDT	Flash Flood Watch	MEG	69 hr
Apr 3, 9:49 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 3, 10:23 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 3, 11:19 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 4, 1:28 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 4, 2:46 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 4, 10:17 AM CDT	Flash Flood Warning	MEG	6 hr
Apr 9, 4:59 AM CDT	Flash Flood Watch	MEG	49 hr
Apr 10, 4:49 AM CDT	Wind Advisory	MEG	17 hr
Apr 10, 5:03 PM CDT	Tornado Watch	SPC	6 hr
Apr 10, 7:48 PM CDT	Mesoscale Discussion	SPC	57 min
Apr 10, 8:22 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 10, 9:54 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 10, 11:34 PM CDT	Mesoscale Discussion	SPC	56 min
Apr 11, 1:17 AM CDT	Flash Flood Warning	MEG	3 hr
Apr 13, 3:44 AM CDT	Freeze Watch	MEG	23 hr
Apr 14, 3:13 AM CDT	Freeze Warning	MEG	30 hr
Apr 18, 5:08 PM CDT	Mesoscale Discussion	SPC	37 min
Apr 28, 3:43 PM CDT	Frost Advisory	MEG	16 hr
May 2, 12:12 PM CDT	Mesoscale Discussion	SPC	2 hr
May 2, 1:54 PM CDT	Tornado Watch	SPC	6 hr
May 2, 3:33 PM CDT	Severe Thunderstorm Warning	MEG	42 min
May 2, 3:35 PM CDT	Mesoscale Discussion	SPC	85 min
May 2, 3:51 PM CDT	Tornado Warning	MEG	39 min
May 2, 4:00 PM CDT	Flash Flood Warning	MEG	90 min
May 2, 4:24 PM CDT	Tornado Warning	MEG	21 min
May 2, 7:09 PM CDT	Mesoscale Discussion	SPC	96 min
May 2, 8:03 PM CDT	Flash Flood Warning	MEG	4 hr
May 2, 11:57 PM CDT	Flash Flood Warning	MEG	3 hr
May 3, 12:32 AM CDT	Severe Thunderstorm Warning	MEG	43 min
May 9, 3:29 PM CDT	Mesoscale Discussion	SPC	2 hr
May 10, 4:05 AM CDT	Mesoscale Discussion	SPC	115 min
May 10, 4:27 PM CDT	Tornado Watch	SPC	10 hr
May 10, 8:45 PM CDT	Severe Thunderstorm Warning	MEG	45 min
May 10, 9:21 PM CDT	Mesoscale Discussion	SPC	84 min
May 10, 9:25 PM CDT	Flash Flood Warning	MEG	4 hr
May 10, 9:36 PM CDT	Severe Thunderstorm Warning	MEG	54 min
May 11, 3:08 AM CDT	Wind Advisory	MEG	12 hr
May 13, 7:11 PM CDT	Mesoscale Discussion	SPC	2 hr
May 26, 11:18 AM CDT	Areal Flood Advisory	MEG	117 min
May 26, 12:10 PM CDT	Mesoscale Discussion	SPC	65 min
May 26, 12:24 PM CDT	Flash Flood Warning	MEG	5 hr
May 26, 3:08 PM CDT	Flash Flood Warning	MEG	3 hr
May 26, 5:14 PM CDT	Mesoscale Discussion	SPC	3 hr
May 27, 7:02 AM CDT	Flash Flood Warning	MEG	4 hr
May 27, 7:47 AM CDT	Flash Flood Warning	MEG	3 hr
May 27, 10:44 AM CDT	Flash Flood Warning	MEG	2 hr
May 27, 11:52 PM CDT	Flash Flood Warning	MEG	3 hr
Jun 1, 12:02 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Jun 1, 4:02 PM CDT	Flash Flood Warning	MEG	3 hr
Jun 2, 2:40 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 2, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 2, 5:02 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 2, 6:47 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 12, 1:10 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 13, 8:11 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 13, 8:54 PM CDT	Severe Thunderstorm Warning	MEG	51 min
Jun 13, 11:01 PM CDT	Areal Flood Advisory	MEG	119 min
Jun 14, 12:04 AM CDT	Areal Flood Advisory	MEG	116 min
Jun 15, 3:18 AM CDT	Dense Fog Advisory	MEG	6 hr
Jul 5, 3:57 AM CDT	Dense Fog Advisory	MEG	4 hr
Jul 5, 7:58 PM CDT	Severe Thunderstorm Warning	MEG	47 min
Jul 5, 8:02 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Jul 5, 9:13 PM CDT	Dense Fog Advisory	MEG	10 hr
Jul 9, 1:06 PM CDT	Areal Flood Advisory	MEG	84 min
Jul 20, 3:27 PM CDT	Heat Advisory	MEG	48 hr
Jul 22, 11:55 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 26, 3:50 AM CDT	Heat Advisory	MEG	4 days
Aug 1, 12:28 PM CDT	Heat Advisory	MEG	64 hr
Aug 2, 10:15 AM CDT	Excessive Heat Warning	MEG	10 hr
Aug 3, 3:46 PM CDT	Heat Advisory	MEG	13 hr
Aug 4, 3:25 PM CDT	Heat Advisory	MEG	29 hr
Aug 7, 12:50 PM CDT	Flash Flood Warning	MEG	3 hr
Aug 21, 9:03 AM CDT	Areal Flood Advisory	MEG	3 hr
Aug 25, 3:30 PM CDT	Flash Flood Warning	MEG	3 hr
Sep 4, 12:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 13, 6:54 AM CDT	Wind Advisory	MEG	32 hr
Sep 14, 1:57 AM CDT	Tornado Watch	SPC	8 hr
Oct 19, 3:34 PM CDT	Frost Advisory	MEG	17 hr
Oct 26, 3:52 AM CDT	Freeze Watch	MEG	35 hr
Oct 27, 3:57 AM CDT	Freeze Watch	MEG	24 hr
Oct 27, 3:57 AM CDT	Freeze Warning	MEG	29 hr
Oct 28, 3:30 AM CDT	Freeze Warning	MEG	30 hr
Oct 29, 2:49 PM CDT	Freeze Warning	MEG	18 hr
Nov 12, 11:36 PM CST	Dense Fog Advisory	MEG	9 hr
Nov 13, 9:52 PM CST	Dense Fog Advisory	MEG	8 hr
Dec 8, 2:47 PM CST	Wind Advisory	MEG	27 hr
Dec 9, 9:22 PM CST	Flash Flood Watch	MEG	7 hr
Dec 11, 6:48 AM CST	Wind Advisory	MEG	10 hr
Dec 13, 3:50 PM CST	Wind Advisory	MEG	27 hr
Dec 15, 5:17 AM CST	Ice Storm Warning	MEG	17 hr
Dec 15, 12:00 PM CST	Freezing Rain Advisory	MEG	24 hr
Dec 15, 6:13 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 15, 11:43 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 16, 5:23 PM CST	Dense Fog Advisory	MEG	12 hr
Dec 17, 9:27 PM CST	Dense Fog Advisory	MEG	12 hr
Dec 18, 4:18 PM CST	Dense Fog Advisory	MEG	12 hr
Dec 23, 4:11 AM CST	Winter Weather Advisory	MEG	10 hr
Dec 23, 6:02 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 24, 2:48 AM CST	Areal Flood Advisory	MEG	3 hr
Dec 24, 10:54 AM CST	Areal Flood Advisory	MEG	3 hr
Dec 24, 11:38 AM CST	Flash Flood Warning	MEG	2 hr
Dec 27, 2:54 AM CST	Wind Advisory	MEG	17 hr
Dec 27, 5:06 PM CST	Mesoscale Discussion	SPC	84 min
Dec 27, 5:47 PM CST	Severe Thunderstorm Watch	SPC	4 hr
Dec 27, 7:58 PM CST	Mesoscale Discussion	SPC	92 min

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	14
Tornado Warning	7
Severe Thunderstorm Watch	7
Tornado Watch	9
Mesoscale Discussion	39
Flooding
Flash Flood Warning	17
Flash Flood Watch	4
Areal Flood Advisory	7
Winter
Ice Storm Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Freezing Rain Advisory	3
Winter Weather Advisory	5
Heat
Excessive Heat Warning	1
Heat Advisory	5
Cold
Freeze Warning	4
Freeze Watch	3
Frost Advisory	2
Wind and dust
High Wind Warning	1
Wind Advisory	16
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	9
Freezing Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2007 2009

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.