Alert archive / North Carolina / Durham County

Weather alerts in Durham County, North Carolina, 2016

192 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Durham County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts: 192
Warnings: 54
Watches: 15
Advisories: 43
Busiest month: July46 alerts
Busiest day: February 24, 201613 alerts

Over time

By month

Warning verification

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

2 of 3 tornado warnings covering Durham County in 2016 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 33 minutes after it went out.

Durham County, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	2	33%	3	100%	33 min
Severe thunderstorm warnings	35	25	29%	27	93%	18 min
Flash flood warnings	8	6	25%	4	50%	143 min

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Raleigh, NC: tornado warnings	25	3	88%	13	92%	28 min
NWS Raleigh, NC: severe thunderstorm warnings	300	223	26%	542	87%	23 min
NWS Raleigh, NC: flash flood warnings	66	39	41%	113	88%	153 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, 6:11 PM EST	Areal Flood Advisory	RAH	4 days
Jan 12, 11:28 AM EST	Wind Advisory	RAH	7 hr
Jan 20, 10:25 AM EST	Winter Weather Advisory	RAH	12 hr
Jan 20, 3:44 PM EST	Winter Storm Watch	RAH	13 hr
Jan 21, 4:52 AM EST	Winter Storm Warning	RAH	61 hr
Jan 21, 4:52 AM EST	Winter Weather Advisory	RAH	3 days
Jan 22, 11:47 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 3, 2:12 PM EST	Special Weather Statement	RAH	78 min
Feb 13, 3:42 PM EST	Winter Storm Watch	RAH	24 hr
Feb 14, 3:53 PM EST	Winter Weather Advisory	RAH	32 hr
Feb 15, 5:02 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 15, 2:11 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 15, 11:34 PM EST	Dense Fog Advisory	RAH	4 hr
Feb 16, 5:39 AM EST	Special Weather Statement	RAH	51 min
Feb 21, 5:34 AM EST	Dense Fog Advisory	RAH	3 hr
Feb 23, 3:59 PM EST	Wind Advisory	RAH	46 hr
Feb 24, 10:46 AM EST	Mesoscale Discussion	SPC	119 min
Feb 24, 11:16 AM EST	Tornado Watch	SPC	8 hr
Feb 24, 1:18 PM EST	Mesoscale Discussion	SPC	117 min
Feb 24, 2:55 PM EST	Mesoscale Discussion	SPC	95 min
Feb 24, 3:35 PM EST	Tornado Warning	RAH	40 min
Feb 24, 3:43 PM EST	Severe Thunderstorm Warning	RAH	62 min
Feb 24, 4:04 PM EST	Tornado Warning	RAH	56 min
Feb 24, 4:13 PM EST	Tornado Warning	RAH	47 min
Feb 24, 4:36 PM EST	Severe Thunderstorm Warning	RAH	69 min
Feb 24, 4:40 PM EST	Areal Flood Advisory	RAH	50 min
Feb 24, 4:46 PM EST	Mesoscale Discussion	SPC	89 min
Feb 24, 5:31 PM EST	Severe Thunderstorm Warning	RAH	44 min
Feb 24, 6:13 PM EST	Severe Thunderstorm Warning	RAH	62 min
Mar 13, 6:55 PM EDT	Special Weather Statement	RAH	50 min
Mar 13, 7:29 PM EDT	Severe Thunderstorm Warning	RAH	46 min
Mar 13, 8:43 PM EDT	Mesoscale Discussion	SPC	92 min
Mar 13, 8:52 PM EDT	Special Weather Statement	RAH	53 min
Mar 13, 9:37 PM EDT	Severe Thunderstorm Warning	RAH	53 min
Mar 14, 2:21 PM EDT	Mesoscale Discussion	SPC	84 min
Mar 14, 5:49 PM EDT	Special Weather Statement	RAH	56 min
Mar 14, 5:56 PM EDT	Severe Thunderstorm Warning	RAH	49 min
Mar 14, 6:25 PM EDT	Mesoscale Discussion	SPC	2 hr
Mar 14, 7:30 PM EDT	Severe Thunderstorm Warning	RAH	45 min
Mar 14, 7:49 PM EDT	Special Weather Statement	RAH	56 min
Mar 14, 8:23 PM EDT	Special Weather Statement	RAH	67 min
Mar 14, 8:30 PM EDT	Severe Thunderstorm Warning	RAH	45 min
Mar 14, 8:44 PM EDT	Special Weather Statement	RAH	61 min
Mar 14, 9:02 PM EDT	Severe Thunderstorm Warning	RAH	43 min
Mar 21, 3:07 AM EDT	Frost Advisory	RAH	30 hr
Mar 31, 11:55 PM EDT	Special Weather Statement	RAH	50 min
Apr 4, 2:49 AM EDT	Freeze Watch	RAH	24 hr
Apr 5, 2:49 AM EDT	Freeze Warning	RAH	30 hr
Apr 7, 5:50 PM EDT	Special Weather Statement	RAH	55 min
Apr 7, 7:04 PM EDT	Special Weather Statement	RAH	41 min
Apr 8, 4:24 AM EDT	Freeze Watch	RAH	24 hr
Apr 8, 3:58 PM EDT	Red Flag Warning	RAH	28 hr
Apr 9, 1:26 AM EDT	Special Weather Statement	RAH	79 min
Apr 9, 1:27 AM EDT	Special Weather Statement	RAH	78 min
Apr 9, 4:12 AM EDT	Freeze Warning	RAH	29 hr
Apr 9, 4:12 AM EDT	Wind Advisory	RAH	15 hr
Apr 22, 2:08 PM EDT	Areal Flood Advisory	RAH	3 hr
Apr 28, 1:18 AM EDT	Areal Flood Advisory	RAH	2 hr
Apr 28, 3:56 PM EDT	Mesoscale Discussion	SPC	64 min
Apr 28, 4:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 28, 4:45 PM EDT	Severe Thunderstorm Warning	RAH	60 min
Apr 28, 6:57 PM EDT	Areal Flood Advisory	RAH	2 hr
Apr 28, 6:57 PM EDT	Severe Thunderstorm Warning	RAH	48 min
Apr 28, 7:03 PM EDT	Mesoscale Discussion	SPC	87 min
May 1, 10:26 AM EDT	Special Weather Statement	RAH	64 min
May 2, 2:43 PM EDT	Mesoscale Discussion	SPC	62 min
May 2, 4:52 PM EDT	Special Weather Statement	RAH	53 min
May 3, 1:57 PM EDT	Mesoscale Discussion	SPC	3 hr
May 3, 2:52 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
May 3, 5:20 PM EDT	Severe Thunderstorm Warning	RAH	40 min
May 6, 4:49 PM EDT	Special Weather Statement	RAH	71 min
May 9, 1:51 AM EDT	Special Weather Statement	RAH	39 min
May 11, 2:12 PM EDT	Mesoscale Discussion	SPC	2 hr
May 22, 8:56 PM EDT	Special Weather Statement	RAH	49 min
May 29, 1:13 PM EDT	Areal Flood Advisory	RAH	3 hr
Jun 3, 3:02 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 7:57 PM EDT	Areal Flood Advisory	RAH	2 hr
Jun 3, 8:26 PM EDT	Special Weather Statement	RAH	64 min
Jun 4, 3:15 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 5, 1:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 5, 3:48 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 7, 4:30 AM EDT	Special Weather Statement	RAH	30 min
Jun 15, 1:40 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 15, 7:43 PM EDT	Special Weather Statement	RAH	77 min
Jun 16, 11:24 PM EDT	Severe Thunderstorm Warning	RAH	81 min
Jun 22, 4:45 PM EDT	Mesoscale Discussion	SPC	90 min
Jun 23, 1:23 AM EDT	Special Weather Statement	RAH	37 min
Jun 23, 1:44 AM EDT	Severe Thunderstorm Warning	RAH	46 min
Jun 23, 3:52 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 7:53 PM EDT	Severe Thunderstorm Warning	RAH	52 min
Jun 23, 8:29 PM EDT	Special Weather Statement	RAH	46 min
Jun 23, 8:35 PM EDT	Mesoscale Discussion	SPC	115 min
Jun 23, 9:26 PM EDT	Special Weather Statement	RAH	64 min
Jun 23, 9:38 PM EDT	Areal Flood Advisory	RAH	22 min
Jun 23, 11:31 PM EDT	Special Weather Statement	RAH	59 min
Jun 29, 4:01 AM EDT	Dense Fog Advisory	RAH	3 hr
Jun 29, 6:39 PM EDT	Severe Thunderstorm Warning	RAH	17 min
Jun 29, 7:33 PM EDT	Severe Thunderstorm Warning	RAH	57 min
Jun 30, 3:15 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 1:22 AM EDT	Special Weather Statement	RAH	53 min
Jul 2, 2:00 AM EDT	Special Weather Statement	RAH	60 min
Jul 3, 3:02 AM EDT	Special Weather Statement	RAH	58 min
Jul 3, 4:37 AM EDT	Areal Flood Advisory	RAH	113 min
Jul 5, 2:10 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 4:46 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 5, 5:46 PM EDT	Severe Thunderstorm Warning	RAH	44 min
Jul 5, 6:27 PM EDT	Severe Thunderstorm Warning	RAH	37 min
Jul 7, 3:42 PM EDT	Mesoscale Discussion	SPC	63 min
Jul 7, 7:14 PM EDT	Special Weather Statement	RAH	46 min
Jul 8, 5:48 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 8, 6:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 8, 7:05 PM EDT	Severe Thunderstorm Warning	RAH	70 min
Jul 8, 8:03 PM EDT	Severe Thunderstorm Warning	RAH	72 min
Jul 8, 9:27 PM EDT	Severe Thunderstorm Warning	RAH	63 min
Jul 12, 8:47 PM EDT	Special Weather Statement	RAH	28 min
Jul 12, 9:16 PM EDT	Special Weather Statement	RAH	29 min
Jul 13, 5:53 PM EDT	Special Weather Statement	RAH	52 min
Jul 15, 1:28 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 4:30 PM EDT	Special Weather Statement	RAH	45 min
Jul 15, 4:36 PM EDT	Severe Thunderstorm Warning	RAH	54 min
Jul 15, 5:02 PM EDT	Areal Flood Advisory	RAH	3 hr
Jul 15, 5:20 PM EDT	Severe Thunderstorm Warning	RAH	55 min
Jul 15, 6:56 PM EDT	Severe Thunderstorm Warning	RAH	31 min
Jul 16, 7:21 PM EDT	Areal Flood Advisory	RAH	3 hr
Jul 16, 8:38 PM EDT	Severe Thunderstorm Warning	RAH	52 min
Jul 16, 9:19 PM EDT	Flash Flood Warning	RAH	2 hr
Jul 16, 10:14 PM EDT	Flash Flood Warning Emergency	RAH	3 hr
Jul 17, 12:19 AM EDT	Areal Flood Warning	RAH	9 hr
Jul 19, 9:41 PM EDT	Severe Thunderstorm Warning	RAH	64 min
Jul 19, 11:14 PM EDT	Mesoscale Discussion	SPC	91 min
Jul 23, 3:31 PM EDT	Heat Advisory	RAH	28 hr
Jul 24, 8:18 PM EDT	Heat Advisory	RAH	24 hr
Jul 25, 3:35 PM EDT	Heat Advisory	RAH	28 hr
Jul 25, 5:10 PM EDT	Special Weather Statement	RAH	50 min
Jul 26, 3:55 PM EDT	Heat Advisory	RAH	28 hr
Jul 26, 9:43 PM EDT	Severe Thunderstorm Warning	RAH	47 min
Jul 26, 10:06 PM EDT	Areal Flood Advisory	RAH	114 min
Jul 27, 1:45 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 3:42 PM EDT	Heat Advisory	RAH	28 hr
Jul 27, 6:34 PM EDT	Severe Thunderstorm Warning	RAH	41 min
Jul 27, 7:16 PM EDT	Special Weather Statement	RAH	29 min
Jul 30, 7:22 PM EDT	Severe Thunderstorm Warning	RAH	18 min
Jul 31, 6:29 PM EDT	Special Weather Statement	RAH	61 min
Jul 31, 7:31 PM EDT	Special Weather Statement	RAH	59 min
Jul 31, 7:47 PM EDT	Areal Flood Advisory	RAH	3 hr
Jul 31, 8:04 PM EDT	Severe Thunderstorm Warning	RAH	41 min
Jul 31, 8:46 PM EDT	Special Weather Statement	RAH	74 min
Jul 31, 9:14 PM EDT	Areal Flood Advisory	RAH	2 hr
Jul 31, 9:27 PM EDT	Severe Thunderstorm Warning	RAH	36 min
Aug 2, 2:17 PM EDT	Areal Flood Advisory	RAH	118 min
Aug 2, 7:21 PM EDT	Flash Flood Warning	RAH	3 hr
Aug 5, 12:54 AM EDT	Special Weather Statement	RAH	81 min
Aug 7, 1:12 PM EDT	Areal Flood Advisory	RAH	3 hr
Aug 7, 1:26 PM EDT	Flash Flood Warning	RAH	3 hr
Aug 8, 3:46 PM EDT	Areal Flood Advisory	RAH	59 min
Aug 8, 4:40 PM EDT	Areal Flood Advisory	RAH	65 min
Aug 14, 3:50 PM EDT	Heat Advisory	RAH	28 hr
Aug 17, 1:04 PM EDT	Mesoscale Discussion	SPC	86 min
Aug 27, 3:25 PM EDT	Mesoscale Discussion	SPC	95 min
Sep 1, 12:43 PM EDT	Flash Flood Watch	RAH	39 hr
Sep 1, 2:15 PM EDT	Mesoscale Discussion	SPC	60 min
Sep 2, 9:06 PM EDT	Areal Flood Advisory	RAH	3 hr
Sep 18, 5:21 AM EDT	Dense Fog Advisory	RAH	4 hr
Sep 18, 9:20 PM EDT	Areal Flood Advisory	RAH	3 hr
Sep 19, 12:00 AM EDT	Areal Flood Advisory	RAH	3 hr
Sep 19, 12:21 AM EDT	Flash Flood Warning	RAH	3 hr
Sep 19, 10:27 AM EDT	Areal Flood Advisory	RAH	2 hr
Sep 27, 9:36 PM EDT	Severe Thunderstorm Warning	RAH	54 min
Sep 28, 12:09 PM EDT	Mesoscale Discussion	SPC	66 min
Sep 28, 2:44 PM EDT	Mesoscale Discussion	SPC	91 min
Sep 28, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 28, 4:13 PM EDT	Special Weather Statement	RAH	62 min
Sep 28, 4:38 PM EDT	Severe Thunderstorm Warning	RAH	37 min
Sep 28, 4:41 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 28, 7:02 PM EDT	Mesoscale Discussion	SPC	88 min
Sep 28, 9:26 PM EDT	Mesoscale Discussion	SPC	64 min
Sep 28, 11:29 PM EDT	Special Weather Statement	RAH	46 min
Sep 30, 11:09 AM EDT	Mesoscale Discussion	SPC	3 hr
Oct 1, 6:29 AM EDT	Dense Fog Advisory	RAH	3 hr
Oct 6, 9:46 PM EDT	Flash Flood Watch	RAH	53 hr
Oct 7, 3:05 PM EDT	Wind Advisory	RAH	51 hr
Oct 8, 10:22 AM EDT	Flash Flood Warning	RAH	6 hr
Oct 8, 1:09 PM EDT	Flash Flood Warning Emergency	RAH	6 hr
Oct 8, 6:55 PM EDT	Flash Flood Warning Emergency	RAH	7 hr
Oct 9, 1:50 AM EDT	Areal Flood Warning	RAH	12 hr
Oct 10, 10:33 PM EDT	Areal Flood Warning	RAH	4 days
Nov 7, 2:01 PM EST	Frost Advisory	RAH	19 hr
Nov 11, 3:40 PM EST	Freeze Watch	RAH	22 hr
Nov 12, 1:55 PM EST	Freeze Warning	RAH	19 hr
Dec 16, 1:38 PM EST	Freezing Rain Advisory	RAH	19 hr
Dec 17, 1:43 AM EST	Special Weather Statement	RAH	77 min
Dec 18, 2:32 PM EST	Special Weather Statement	RAH	28 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	35
Tornado Warning	3
Severe Thunderstorm Watch	7
Tornado Watch	1
Mesoscale Discussion	37
Special Weather Statement	43
Flooding
Areal Flood Warning	3
Flash Flood Warning	8
Flash Flood Watch	2
Areal Flood Advisory	22
Winter
Winter Storm Warning	1
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	3
Heat
Heat Advisory	6
Cold
Freeze Warning	3
Freeze Watch	3
Frost Advisory	2
Wind and dust
Wind Advisory	4
Fire
Red Flag Warning	1
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 2015 2017

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.