Alert archive / North Carolina / Nash County

Weather alerts in Nash County, North Carolina, 2009

145 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Nash County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 145
Warnings: 46
Watches: 24
Advisories: 32
Busiest month: May35 alerts
Busiest day: May 5, 200910 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 5 tornado warnings covering Nash County in 2009 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 26 minutes after it went out.

Nash County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	3	40%	3	67%	26 min
Severe thunderstorm warnings	30	18	40%	18	89%	19 min
Flash flood warnings	4	2	50%	1	100%	40 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Raleigh, NC: tornado warnings	24	9	63%	18	94%	21 min
NWS Raleigh, NC: severe thunderstorm warnings	333	181	46%	356	88%	23 min
NWS Raleigh, NC: flash flood warnings	41	20	51%	56	84%	66 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 2, 9:10 AM EST	Winter Weather Advisory	RAH	2 hr
Jan 3, 2:06 AM EST	Dense Fog Advisory	RAH	9 hr
Jan 6, 11:34 PM EST	Dense Fog Advisory	RAH	6 hr
Jan 7, 3:38 AM EST	Wind Advisory	RAH	18 hr
Jan 7, 9:12 AM EST	Severe Thunderstorm Warning	RAH	51 min
Jan 7, 5:18 PM EST	High Wind Warning	RAH	115 min
Jan 18, 9:37 PM EST	Dense Fog Advisory	RAH	11 hr
Jan 19, 3:59 AM EST	Winter Storm Watch	RAH	11 hr
Jan 19, 2:31 PM EST	Winter Storm Warning	RAH	25 hr
Jan 20, 3:34 PM EST	Winter Weather Advisory	RAH	17 hr
Jan 21, 1:20 PM EST	Winter Weather Advisory	RAH	20 hr
Jan 28, 6:05 AM EST	Dense Fog Advisory	RAH	4 hr
Jan 28, 5:13 PM EST	Severe Thunderstorm Warning	RAH	47 min
Feb 3, 12:30 PM EST	Winter Weather Advisory	RAH	20 hr
Feb 11, 10:22 AM EST	Fire Weather Watch	RAH	19 hr
Feb 12, 5:36 AM EST	Red Flag Warning	RAH	14 hr
Mar 1, 4:25 AM EST	Winter Weather Advisory	RAH	26 hr
Mar 2, 11:02 AM EST	Winter Weather Advisory	RAH	22 hr
Mar 18, 3:17 AM EDT	Dense Fog Advisory	RAH	9 hr
Mar 28, 4:53 PM EDT	Mesoscale Discussion	SPC	67 min
Apr 3, 4:10 AM EDT	Wind Advisory	RAH	16 hr
Apr 6, 8:03 AM EDT	Tornado Watch	SPC	7 hr
Apr 6, 8:57 AM EDT	Severe Thunderstorm Warning	RAH	33 min
Apr 6, 9:36 AM EDT	Severe Thunderstorm Warning	RAH	24 min
Apr 6, 10:08 AM EDT	Severe Thunderstorm Warning	RAH	22 min
Apr 6, 10:10 AM EDT	Tornado Warning	RAH	32 min
Apr 6, 10:33 AM EDT	Mesoscale Discussion	SPC	57 min
Apr 6, 3:47 PM EDT	Freeze Watch	RAH	24 hr
Apr 7, 3:30 PM EDT	Freeze Warning	RAH	16 hr
Apr 10, 11:20 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 12, 6:44 PM EDT	Frost Advisory	RAH	7 hr
Apr 14, 11:22 AM EDT	Mesoscale Discussion	SPC	83 min
Apr 16, 3:30 PM EDT	Frost Advisory	RAH	18 hr
Apr 20, 12:22 PM EDT	Mesoscale Discussion	SPC	83 min
Apr 20, 2:09 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 20, 2:50 PM EDT	Tornado Watch	SPC	7 hr
Apr 20, 4:57 PM EDT	Mesoscale Discussion	SPC	93 min
Apr 22, 10:01 AM EDT	Red Flag Warning	RAH	8 hr
May 1, 1:03 PM EDT	Mesoscale Discussion	SPC	117 min
May 4, 1:15 PM EDT	Mesoscale Discussion	SPC	60 min
May 4, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
May 4, 6:15 PM EDT	Mesoscale Discussion	SPC	60 min
May 4, 9:08 PM EDT	Mesoscale Discussion	SPC	97 min
May 5, 4:04 PM EDT	Severe Thunderstorm Warning	RAH	41 min
May 5, 4:12 PM EDT	Tornado Warning	RAH	48 min
May 5, 4:58 PM EDT	Tornado Warning	RAH	18 min
May 5, 5:22 PM EDT	Severe Thunderstorm Warning	RAH	38 min
May 5, 5:28 PM EDT	Tornado Warning	RAH	47 min
May 5, 5:37 PM EDT	Mesoscale Discussion	SPC	53 min
May 5, 5:45 PM EDT	Tornado Watch	SPC	5 hr
May 5, 6:10 PM EDT	Tornado Warning	RAH	26 min
May 5, 7:10 PM EDT	Mesoscale Discussion	SPC	65 min
May 5, 8:43 PM EDT	Mesoscale Discussion	SPC	62 min
May 6, 11:40 AM EDT	Mesoscale Discussion	SPC	2 hr
May 6, 2:16 PM EDT	Tornado Watch	SPC	6 hr
May 6, 4:36 PM EDT	Severe Thunderstorm Warning	RAH	39 min
May 6, 5:10 PM EDT	Severe Thunderstorm Warning	RAH	50 min
May 6, 7:29 PM EDT	Mesoscale Discussion	SPC	91 min
May 6, 8:26 PM EDT	Tornado Watch	SPC	8 hr
May 6, 10:50 PM EDT	Mesoscale Discussion	SPC	55 min
May 7, 12:10 AM EDT	Mesoscale Discussion	SPC	95 min
May 7, 5:17 AM EDT	Mesoscale Discussion	SPC	118 min
May 7, 3:03 PM EDT	Mesoscale Discussion	SPC	117 min
May 8, 1:17 AM EDT	Areal Flood Advisory	RAH	3 hr
May 9, 12:51 AM EDT	Mesoscale Discussion	SPC	84 min
May 9, 5:58 PM EDT	Mesoscale Discussion	SPC	62 min
May 9, 6:25 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
May 9, 6:40 PM EDT	Severe Thunderstorm Warning	RAH	65 min
May 28, 3:49 PM EDT	Mesoscale Discussion	SPC	56 min
May 29, 2:22 PM EDT	Mesoscale Discussion	SPC	23 min
May 29, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 29, 6:01 PM EDT	Mesoscale Discussion	SPC	59 min
May 31, 2:48 PM EDT	Mesoscale Discussion	SPC	117 min
Jun 8, 5:03 AM EDT	Dense Fog Advisory	RAH	4 hr
Jun 9, 2:31 PM EDT	Mesoscale Discussion	SPC	89 min
Jun 9, 5:16 PM EDT	Severe Thunderstorm Warning	RAH	59 min
Jun 9, 6:18 PM EDT	Severe Thunderstorm Warning	RAH	57 min
Jun 9, 7:13 PM EDT	Flash Flood Warning	RAH	56 min
Jun 9, 7:19 PM EDT	Severe Thunderstorm Warning	RAH	56 min
Jun 11, 6:20 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 11, 8:24 PM EDT	Mesoscale Discussion	SPC	66 min
Jun 12, 4:49 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 1:21 PM EDT	Severe Thunderstorm Warning	RAH	27 min
Jun 16, 4:20 AM EDT	Flash Flood Watch	RAH	9 hr
Jun 16, 6:45 AM EDT	Flash Flood Warning	RAH	3 hr
Jun 16, 9:39 AM EDT	Flash Flood Warning	RAH	111 min
Jul 2, 12:02 AM EDT	Severe Thunderstorm Warning	RAH	43 min
Jul 13, 8:06 AM EDT	Mesoscale Discussion	SPC	54 min
Jul 17, 9:52 AM EDT	Mesoscale Discussion	SPC	83 min
Jul 17, 2:42 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 17, 2:54 PM EDT	Severe Thunderstorm Warning	RAH	51 min
Jul 17, 3:40 PM EDT	Severe Thunderstorm Warning	RAH	50 min
Jul 17, 5:52 PM EDT	Severe Thunderstorm Warning	RAH	68 min
Jul 17, 9:15 PM EDT	Mesoscale Discussion	SPC	60 min
Jul 22, 4:26 PM EDT	Severe Thunderstorm Warning	RAH	49 min
Jul 24, 3:22 AM EDT	Areal Flood Advisory	RAH	104 min
Jul 25, 5:49 PM EDT	Severe Thunderstorm Warning	RAH	56 min
Jul 25, 6:30 PM EDT	Severe Thunderstorm Warning	RAH	45 min
Jul 26, 9:42 PM EDT	Severe Thunderstorm Warning	RAH	48 min
Jul 27, 11:58 AM EDT	Mesoscale Discussion	SPC	92 min
Jul 27, 12:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 27, 3:45 PM EDT	Mesoscale Discussion	SPC	60 min
Jul 28, 8:19 PM EDT	Severe Thunderstorm Warning	RAH	35 min
Jul 29, 1:32 PM EDT	Mesoscale Discussion	SPC	28 min
Jul 31, 2:23 PM EDT	Severe Thunderstorm Warning	RAH	52 min
Jul 31, 2:25 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 31, 2:54 PM EDT	Severe Thunderstorm Warning	RAH	51 min
Jul 31, 4:47 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 31, 6:54 PM EDT	Mesoscale Discussion	SPC	66 min
Aug 2, 11:33 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 5, 3:00 PM EDT	Severe Thunderstorm Warning	RAH	45 min
Aug 9, 2:47 PM EDT	Heat Advisory	RAH	29 hr
Aug 11, 3:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 11, 6:54 PM EDT	Severe Thunderstorm Warning	RAH	51 min
Aug 11, 7:19 PM EDT	Severe Thunderstorm Warning	RAH	56 min
Aug 12, 11:25 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 12:23 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 12, 4:13 PM EDT	Mesoscale Discussion	SPC	92 min
Aug 14, 2:59 PM EDT	Areal Flood Advisory	RAH	3 hr
Aug 22, 11:58 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 28, 4:44 PM EDT	Mesoscale Discussion	SPC	61 min
Sep 28, 5:47 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 28, 7:01 PM EDT	Severe Thunderstorm Warning	RAH	44 min
Sep 28, 7:49 PM EDT	Severe Thunderstorm Warning	RAH	41 min
Oct 19, 2:05 AM EDT	Frost Advisory	RAH	31 hr
Oct 24, 12:19 PM EDT	Mesoscale Discussion	SPC	116 min
Nov 5, 2:52 PM EST	Frost Advisory	RAH	18 hr
Nov 6, 3:23 AM EST	Freeze Watch	RAH	6 hr
Nov 6, 9:03 AM EST	Freeze Warning	RAH	24 hr
Nov 10, 2:35 PM EST	Flash Flood Watch	RAH	54 hr
Nov 11, 3:37 AM EST	Wind Advisory	RAH	50 hr
Nov 12, 8:32 AM EST	Areal Flood Advisory	RAH	6 hr
Nov 12, 9:51 AM EST	Flash Flood Warning	RAH	4 hr
Nov 15, 9:16 PM EST	Dense Fog Advisory	RAH	12 hr
Nov 19, 9:39 PM EST	Dense Fog Advisory	RAH	8 hr
Nov 26, 1:36 AM EST	Dense Fog Advisory	RAH	8 hr
Dec 2, 6:59 PM EST	Tornado Watch PDS	SPC	8 hr
Dec 2, 8:12 PM EST	Areal Flood Advisory	RAH	3 hr
Dec 2, 8:31 PM EST	Mesoscale Discussion	SPC	89 min
Dec 3, 12:12 AM EST	Mesoscale Discussion	SPC	93 min
Dec 4, 11:15 AM EST	River Flood Warning	RAH	24 hr
Dec 8, 9:10 PM EST	Wind Advisory	RAH	24 hr
Dec 13, 7:54 PM EST	Dense Fog Advisory	RAH	16 hr
Dec 15, 4:23 AM EST	Dense Fog Advisory	RAH	6 hr
Dec 17, 4:25 PM EST	Winter Weather Advisory	RAH	44 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	30
Tornado Warning	5
Severe Thunderstorm Watch	12
Tornado Watch	6
Mesoscale Discussion	43
Flooding
Flash Flood Warning	4
River Flood Warning	1
Flash Flood Watch	2
Areal Flood Advisory	5
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	7
Heat
Heat Advisory	1
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	4
Wind and dust
High Wind Warning	1
Wind Advisory	4
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	11

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2008 2010

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.