Alert archive / North Carolina / Henderson County

Weather alerts in Henderson County, North Carolina, 2012

189 weather alerts in 2012, 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 2012. Tap one for its archive.

Alerts: 189
Warnings: 50
Watches: 23
Advisories: 34
Busiest month: July49 alerts
Busiest day: February 24, 20126 alerts

Over time

By month

Warning verification

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

Henderson County, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	34	25	26%	18	78%	23 min
Flash flood warnings	3	1	67%	2	50%	136 min

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Greenville-Spartanburg, SC: tornado warnings	15	0	100%	1	0%
NWS Greenville-Spartanburg, SC: severe thunderstorm warnings	581	410	29%	722	89%	23 min
NWS Greenville-Spartanburg, SC: flash flood warnings	33	19	42%	47	79%	46 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, 10:36 AM EST	Lake Wind Advisory	GSP	55 hr
Jan 1, 3:30 PM EST	Winter Weather Advisory	GSP	45 hr
Jan 9, 9:58 PM EST	Dense Fog Advisory	GSP	11 hr
Jan 10, 2:44 PM EST	Flood Watch	GSP	29 hr
Jan 11, 3:40 PM EST	Special Weather Statement	GSP	50 min
Jan 11, 4:24 PM EST	Special Weather Statement	GSP	66 min
Jan 12, 4:11 AM EST	Lake Wind Advisory	GSP	17 hr
Jan 12, 9:18 PM EST	Wind Advisory	GSP	6 hr
Jan 13, 3:37 AM EST	Lake Wind Advisory	GSP	6 hr
Jan 21, 9:08 AM EST	Special Weather Statement	GSP	37 min
Jan 21, 9:42 AM EST	Special Weather Statement	GSP	63 min
Jan 24, 1:20 AM EST	Dense Fog Advisory	GSP	10 hr
Feb 5, 7:56 AM EST	Dense Fog Advisory	GSP	3 hr
Feb 11, 4:10 AM EST	Lake Wind Advisory	GSP	26 hr
Feb 11, 4:20 AM EST	Wind Chill Advisory	GSP	30 hr
Feb 11, 5:05 PM EST	Wind Advisory	GSP	13 hr
Feb 23, 2:38 PM EST	Wind Advisory	GSP	51 hr
Feb 24, 6:56 AM EST	Mesoscale Discussion	SPC	94 min
Feb 24, 9:05 AM EST	Mesoscale Discussion	SPC	25 min
Feb 24, 9:17 AM EST	Tornado Watch	SPC	7 hr
Feb 24, 12:00 PM EST	Mesoscale Discussion	SPC	60 min
Feb 24, 2:41 PM EST	Fire Weather Watch	GSP	15 hr
Feb 24, 3:24 PM EST	Mesoscale Discussion	SPC	66 min
Feb 25, 3:31 AM EST	Red Flag Warning	GSP	16 hr
Feb 29, 5:36 PM EST	Mesoscale Discussion	SPC	54 min
Feb 29, 6:37 PM EST	Tornado Watch	SPC	3 hr
Mar 2, 3:30 AM EST	Mesoscale Discussion	SPC	90 min
Mar 2, 3:19 PM EST	Tornado Watch	SPC	8 hr
Mar 2, 8:15 PM EST	Mesoscale Discussion	SPC	90 min
Mar 2, 10:54 PM EST	Tornado Watch	SPC	6 hr
Mar 2, 11:20 PM EST	Special Weather Statement	GSP	25 min
Mar 4, 3:48 AM EST	Lake Wind Advisory	GSP	16 hr
Mar 4, 7:52 PM EST	Lake Wind Advisory	GSP	22 hr
Mar 13, 5:59 PM EDT	Special Weather Statement	GSP	46 min
Mar 15, 4:27 PM EDT	Special Weather Statement	GSP	63 min
Mar 15, 4:40 PM EDT	Severe Thunderstorm Warning	GSP	65 min
Mar 16, 8:30 PM EDT	Special Weather Statement	GSP	45 min
Mar 24, 7:29 AM EDT	Severe Thunderstorm Warning	GSP	26 min
Mar 24, 8:05 AM EDT	Special Weather Statement	GSP	40 min
Mar 29, 3:19 PM EDT	Mesoscale Discussion	SPC	116 min
Mar 31, 5:18 PM EDT	Special Weather Statement	GSP	27 min
Apr 1, 2:31 PM EDT	Mesoscale Discussion	SPC	89 min
Apr 1, 5:18 PM EDT	Severe Thunderstorm Warning	GSP	57 min
Apr 2, 1:48 PM EDT	Mesoscale Discussion	SPC	87 min
Apr 3, 1:59 PM EDT	Severe Thunderstorm Warning	GSP	61 min
Apr 3, 2:58 PM EDT	Severe Thunderstorm Warning	GSP	62 min
Apr 5, 1:03 PM EDT	Mesoscale Discussion	SPC	87 min
Apr 5, 1:21 PM EDT	Severe Thunderstorm Warning	GSP	54 min
Apr 5, 1:47 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 5, 2:10 PM EDT	Special Weather Statement	GSP	35 min
Apr 5, 3:37 PM EDT	Mesoscale Discussion	SPC	53 min
Apr 5, 5:59 PM EDT	Areal Flood Advisory	GSP	3 hr
Apr 5, 8:50 PM EDT	Areal Flood Advisory	GSP	2 hr
Apr 6, 5:33 AM EDT	Frost Advisory	GSP	28 hr
Apr 9, 11:10 AM EDT	Fire Weather Watch	GSP	16 hr
Apr 9, 2:34 PM EDT	Freeze Watch	GSP	13 hr
Apr 10, 3:15 AM EDT	Red Flag Warning	GSP	17 hr
Apr 10, 3:27 AM EDT	Freeze Warning	GSP	30 hr
Apr 10, 3:11 PM EDT	Freeze Watch	GSP	20 hr
Apr 11, 11:06 AM EDT	Freeze Warning	GSP	22 hr
Apr 11, 3:02 PM EDT	Freeze Watch	GSP	24 hr
Apr 12, 2:49 PM EDT	Freeze Warning	GSP	18 hr
Apr 21, 12:48 PM EDT	Special Weather Statement	GSP	117 min
Apr 22, 10:22 PM EDT	Wind Advisory	GSP	23 hr
Apr 23, 5:08 AM EDT	Freeze Warning	GSP	27 hr
Apr 26, 7:24 AM EDT	Mesoscale Discussion	SPC	96 min
Apr 26, 8:10 AM EDT	Severe Thunderstorm Watch	SPC	3 hr
Apr 26, 8:26 AM EDT	Severe Thunderstorm Warning	GSP	64 min
Apr 26, 8:47 AM EDT	Mesoscale Discussion	SPC	88 min
Apr 26, 2:53 PM EDT	Severe Thunderstorm Warning	GSP	67 min
Apr 26, 4:22 PM EDT	Mesoscale Discussion	SPC	83 min
Apr 26, 8:23 PM EDT	Special Weather Statement	GSP	37 min
Apr 27, 4:18 AM EDT	Dense Fog Advisory	GSP	3 hr
May 1, 2:51 PM EDT	Severe Thunderstorm Warning	GSP	54 min
May 1, 4:53 PM EDT	Special Weather Statement	GSP	37 min
May 5, 8:50 AM EDT	Special Weather Statement	GSP	55 min
May 5, 9:28 AM EDT	Special Weather Statement	GSP	62 min
May 8, 7:31 PM EDT	Areal Flood Advisory	GSP	3 hr
May 14, 5:29 AM EDT	Areal Flood Advisory	GSP	3 hr
May 14, 5:44 AM EDT	Flash Flood Warning	GSP	6 hr
May 14, 5:23 PM EDT	Flash Flood Watch	GSP	10 hr
May 14, 6:14 PM EDT	Mesoscale Discussion	SPC	61 min
May 15, 10:54 AM EDT	Flash Flood Watch	GSP	17 hr
May 15, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 15, 3:51 PM EDT	Special Weather Statement	GSP	24 min
May 15, 4:25 PM EDT	Severe Thunderstorm Warning	GSP	36 min
May 15, 6:30 PM EDT	Mesoscale Discussion	SPC	90 min
May 15, 8:42 PM EDT	Mesoscale Discussion	SPC	63 min
May 19, 5:26 PM EDT	Special Weather Statement	GSP	34 min
May 19, 5:37 PM EDT	Severe Thunderstorm Warning	GSP	28 min
May 23, 5:37 AM EDT	Special Weather Statement	GSP	113 min
Jun 12, 2:07 PM EDT	Special Weather Statement	GSP	38 min
Jun 12, 2:50 PM EDT	Special Weather Statement	GSP	40 min
Jun 13, 12:57 PM EDT	Severe Thunderstorm Warning	GSP	63 min
Jun 21, 3:04 PM EDT	Severe Thunderstorm Warning	GSP	39 min
Jun 22, 3:14 PM EDT	Severe Thunderstorm Warning	GSP	61 min
Jul 1, 1:39 PM EDT	Mesoscale Discussion	SPC	96 min
Jul 1, 5:03 PM EDT	Severe Thunderstorm Warning	GSP	57 min
Jul 1, 5:41 PM EDT	Severe Thunderstorm Warning	GSP	64 min
Jul 1, 5:52 PM EDT	Severe Thunderstorm Warning	GSP	18 min
Jul 1, 7:58 PM EDT	Severe Thunderstorm Warning	GSP	62 min
Jul 1, 8:58 PM EDT	Severe Thunderstorm Warning	GSP	47 min
Jul 3, 1:20 PM EDT	Severe Thunderstorm Warning	GSP	55 min
Jul 3, 6:23 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 4, 1:41 PM EDT	Severe Thunderstorm Warning	GSP	37 min
Jul 4, 2:02 PM EDT	Mesoscale Discussion	SPC	58 min
Jul 4, 2:20 PM EDT	Special Weather Statement	GSP	25 min
Jul 4, 3:21 PM EDT	Special Weather Statement	GSP	39 min
Jul 4, 3:56 PM EDT	Special Weather Statement	GSP	49 min
Jul 5, 1:11 PM EDT	Mesoscale Discussion	SPC	94 min
Jul 5, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 5, 3:18 PM EDT	Severe Thunderstorm Warning	GSP	57 min
Jul 5, 6:26 PM EDT	Severe Thunderstorm Warning	GSP	64 min
Jul 8, 4:17 PM EDT	Severe Thunderstorm Warning	GSP	35 min
Jul 9, 1:01 PM EDT	Mesoscale Discussion	SPC	89 min
Jul 10, 12:23 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 10, 1:15 PM EDT	Special Weather Statement	GSP	30 min
Jul 10, 1:39 PM EDT	Special Weather Statement	GSP	36 min
Jul 10, 1:44 PM EDT	Special Weather Statement	GSP	31 min
Jul 17, 2:16 PM EDT	Special Weather Statement	GSP	44 min
Jul 17, 2:23 PM EDT	Severe Thunderstorm Warning	GSP	48 min
Jul 17, 3:07 PM EDT	Severe Thunderstorm Warning	GSP	29 min
Jul 18, 2:07 PM EDT	Special Weather Statement	GSP	38 min
Jul 18, 2:23 PM EDT	Severe Thunderstorm Warning	GSP	37 min
Jul 18, 3:24 PM EDT	Special Weather Statement	GSP	36 min
Jul 18, 3:53 PM EDT	Severe Thunderstorm Warning	GSP	67 min
Jul 19, 4:55 PM EDT	Special Weather Statement	GSP	35 min
Jul 19, 11:40 PM EDT	Special Weather Statement	GSP	35 min
Jul 20, 2:47 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 2:17 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 12:58 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 23, 1:15 PM EDT	Special Weather Statement	GSP	45 min
Jul 23, 2:52 PM EDT	Special Weather Statement	GSP	23 min
Jul 23, 3:14 PM EDT	Special Weather Statement	GSP	31 min
Jul 23, 3:52 PM EDT	Special Weather Statement	GSP	23 min
Jul 24, 1:12 PM EDT	Mesoscale Discussion	SPC	93 min
Jul 24, 2:36 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 25, 7:15 AM EDT	Special Weather Statement	GSP	60 min
Jul 25, 3:11 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 25, 5:40 PM EDT	Special Weather Statement	GSP	50 min
Jul 25, 6:59 PM EDT	Special Weather Statement	GSP	46 min
Jul 27, 1:54 PM EDT	Mesoscale Discussion	SPC	66 min
Jul 27, 2:52 PM EDT	Special Weather Statement	GSP	38 min
Jul 27, 3:20 PM EDT	Severe Thunderstorm Warning	GSP	55 min
Jul 28, 1:57 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 2, 3:10 PM EDT	Severe Thunderstorm Warning	GSP	65 min
Aug 2, 11:25 PM EDT	Special Weather Statement	GSP	50 min
Aug 2, 11:51 PM EDT	Areal Flood Advisory	GSP	2 hr
Aug 4, 12:34 AM EDT	Special Weather Statement	GSP	41 min
Aug 4, 3:05 AM EDT	Areal Flood Advisory	GSP	115 min
Aug 9, 1:55 PM EDT	Special Weather Statement	GSP	35 min
Aug 9, 2:55 PM EDT	Severe Thunderstorm Warning	GSP	46 min
Aug 9, 4:38 PM EDT	Special Weather Statement	GSP	37 min
Aug 9, 4:51 PM EDT	Severe Thunderstorm Warning	GSP	69 min
Aug 14, 4:16 PM EDT	Severe Thunderstorm Warning	GSP	59 min
Aug 22, 11:10 PM EDT	Special Weather Statement	GSP	35 min
Aug 22, 11:29 PM EDT	Flash Flood Warning	GSP	2 hr
Aug 25, 4:26 PM EDT	Special Weather Statement	GSP	49 min
Sep 2, 2:04 PM EDT	Areal Flood Advisory	GSP	86 min
Sep 17, 4:19 AM EDT	Flash Flood Watch	GSP	7 hr
Sep 17, 11:46 AM EDT	Flood Watch	GSP	30 hr
Sep 17, 6:39 PM EDT	Tornado Watch	SPC	8 hr
Sep 17, 8:14 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 18, 12:23 AM EDT	Mesoscale Discussion	SPC	97 min
Sep 18, 10:48 AM EDT	Areal Flood Advisory	GSP	4 hr
Sep 18, 12:59 PM EDT	Areal Flood Warning	GSP	94 min
Sep 18, 8:44 PM EDT	River Flood Warning	GSP	13 hr
Sep 28, 2:36 PM EDT	Mesoscale Discussion	SPC	114 min
Sep 28, 3:40 PM EDT	Special Weather Statement	GSP	35 min
Sep 29, 3:11 PM EDT	Special Weather Statement	GSP	49 min
Sep 29, 3:18 PM EDT	Severe Thunderstorm Warning	GSP	57 min
Oct 2, 6:32 AM EDT	Flash Flood Warning	GSP	3 hr
Oct 2, 8:00 AM EDT	Areal Flood Advisory	GSP	3 hr
Oct 2, 11:15 AM EDT	Areal Flood Advisory	GSP	8 hr
Oct 10, 3:25 AM EDT	Frost Advisory	GSP	30 hr
Oct 20, 2:47 PM EDT	Frost Advisory	GSP	18 hr
Oct 21, 5:46 PM EDT	Frost Advisory	GSP	15 hr
Oct 28, 5:21 AM EDT	Freeze Warning	GSP	28 hr
Oct 28, 5:21 AM EDT	High Wind Watch	GSP	11 hr
Oct 28, 5:21 AM EDT	High Wind Warning	GSP	53 hr
Dec 19, 3:19 PM EST	High Wind Watch	GSP	12 hr
Dec 20, 3:44 AM EST	High Wind Warning	GSP	56 hr
Dec 24, 7:15 PM EST	Dense Fog Advisory	GSP	15 hr
Dec 25, 3:04 PM EST	Wind Advisory	GSP	27 hr
Dec 25, 10:27 PM EST	Flash Flood Watch	GSP	14 hr
Dec 26, 6:04 AM EST	Areal Flood Advisory	GSP	3 hr
Dec 26, 7:59 AM EST	River Flood Warning	GSP	23 hr
Dec 26, 2:22 PM EST	High Wind Warning	GSP	23 hr
Dec 29, 4:12 AM EST	Wind Advisory	GSP	32 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	34
Severe Thunderstorm Watch	5
Tornado Watch	5
Mesoscale Discussion	34
Special Weather Statement	48
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	2
Flash Flood Watch	4
Flood Watch	2
Areal Flood Advisory	11
Winter
Winter Weather Advisory	1
Cold
Freeze Warning	5
Freeze Watch	3
Frost Advisory	4
Wind Chill Advisory	1
Wind and dust
High Wind Warning	3
High Wind Watch	2
Lake Wind Advisory	6
Wind Advisory	6
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2011 2013

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.