Alert archive / North Carolina / Rowan County

Weather alerts in Rowan County, North Carolina, 2020

162 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rowan County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 162
Warnings: 36
Watches: 14
Advisories: 42
Busiest month: July30 alerts
Busiest day: February 6, 20208 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 2 tornado warnings covering Rowan County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 12 minutes after it went out.

Rowan County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	1	100%	12 min
Severe thunderstorm warnings	20	15	25%	21	90%	17 min
Flash flood warnings	4	2	50%	2	50%	99 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Greenville-Spartanburg, SC: tornado warnings	61	13	79%	25	72%	14 min
NWS Greenville-Spartanburg, SC: severe thunderstorm warnings	325	183	44%	520	75%	21 min
NWS Greenville-Spartanburg, SC: flash flood warnings	79	42	47%	138	71%	121 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 11, 5:38 PM EST	Tornado Watch	SPC	6 hr
Jan 11, 8:40 PM EST	Mesoscale Discussion	SPC	95 min
Jan 11, 9:41 PM EST	Severe Thunderstorm Warning	GSP	49 min
Jan 11, 10:19 PM EST	Severe Thunderstorm Warning	GSP	41 min
Jan 15, 3:49 AM EST	Dense Fog Advisory	GSP	6 hr
Jan 24, 6:31 PM EST	Special Weather Statement	GSP	29 min
Feb 5, 4:20 AM EST	Flash Flood Watch	GSP	44 hr
Feb 6, 9:50 AM EST	Mesoscale Discussion	SPC	55 min
Feb 6, 10:12 AM EST	Tornado Watch	SPC	7 hr
Feb 6, 10:27 AM EST	Areal Flood Advisory	GSP	14 hr
Feb 6, 10:43 AM EST	Severe Thunderstorm Warning	GSP	47 min
Feb 6, 10:47 AM EST	Tornado Warning	GSP	43 min
Feb 6, 11:43 AM EST	Tornado Warning	GSP	32 min
Feb 6, 12:11 PM EST	Areal Flood Advisory	GSP	3 hr
Feb 6, 5:02 PM EST	Areal Flood Warning	GSP	6 hr
Feb 6, 9:47 PM EST	Wind Advisory	GSP	20 hr
Feb 6, 11:58 PM EST	River Flood Warning	GSP	35 hr
Feb 13, 9:26 AM EST	Special Weather Statement	GSP	34 min
Feb 19, 3:11 PM EST	Winter Weather Advisory	GSP	33 hr
Feb 26, 3:51 AM EST	Dense Fog Advisory	GSP	6 hr
Mar 18, 2:29 AM EDT	Dense Fog Advisory	GSP	9 hr
Apr 9, 5:41 AM EDT	Special Weather Statement	GSP	49 min
Apr 9, 8:28 PM EDT	Red Flag Warning	GSP	24 hr
Apr 10, 2:58 PM EDT	Frost Advisory	GSP	18 hr
Apr 12, 3:56 AM EDT	Wind Advisory	GSP	36 hr
Apr 12, 11:17 PM EDT	Mesoscale Discussion	SPC	88 min
Apr 13, 1:51 AM EDT	Tornado Watch	SPC	6 hr
Apr 13, 2:39 AM EDT	Mesoscale Discussion	SPC	96 min
Apr 13, 4:13 AM EDT	Severe Thunderstorm Warning	GSP	62 min
Apr 13, 5:10 AM EDT	Severe Thunderstorm Warning	GSP	50 min
Apr 15, 3:46 AM EDT	Frost Advisory	GSP	28 hr
Apr 16, 2:50 PM EDT	Frost Advisory	GSP	17 hr
Apr 18, 9:58 PM EDT	Frost Advisory	GSP	11 hr
Apr 25, 8:58 PM EDT	Mesoscale Discussion	SPC	92 min
Apr 25, 10:27 PM EDT	Severe Thunderstorm Warning	GSP	48 min
Apr 26, 6:21 PM EDT	Special Weather Statement	GSP	24 min
Apr 30, 1:28 AM EDT	Special Weather Statement	GSP	32 min
Apr 30, 7:41 PM EDT	Special Weather Statement	GSP	49 min
May 5, 3:22 PM EDT	Mesoscale Discussion	SPC	113 min
May 5, 3:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 8, 2:49 PM EDT	Frost Advisory	GSP	19 hr
May 9, 4:10 AM EDT	Freeze Warning	GSP	30 hr
May 18, 2:51 PM EDT	Flash Flood Watch	GSP	3 days
May 21, 4:33 AM EDT	Areal Flood Advisory	GSP	24 hr
May 22, 4:46 AM EDT	Dense Fog Advisory	GSP	5 hr
May 22, 4:48 AM EDT	Areal Flood Advisory	GSP	4 hr
May 22, 1:18 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 22, 4:41 PM EDT	Special Weather Statement	GSP	49 min
May 23, 2:55 AM EDT	Dense Fog Advisory	GSP	6 hr
May 23, 7:58 PM EDT	Special Weather Statement	GSP	32 min
May 23, 8:27 PM EDT	Special Weather Statement	GSP	33 min
May 23, 8:59 PM EDT	Special Weather Statement	GSP	31 min
May 24, 1:44 PM EDT	Mesoscale Discussion	SPC	2 hr
May 24, 5:56 PM EDT	Special Weather Statement	GSP	34 min
May 24, 6:08 PM EDT	Severe Thunderstorm Warning	GSP	52 min
May 24, 7:33 PM EDT	Areal Flood Advisory	GSP	6 hr
May 25, 1:16 AM EDT	Areal Flood Advisory	GSP	3 hr
May 25, 4:04 AM EDT	Areal Flood Advisory	GSP	7 hr
May 27, 3:37 AM EDT	Flash Flood Watch	GSP	22 hr
May 27, 6:43 PM EDT	Areal Flood Advisory	GSP	9 hr
May 28, 3:29 AM EDT	Areal Flood Advisory	GSP	29 hr
May 28, 7:55 PM EDT	Severe Thunderstorm Warning	GSP	50 min
May 29, 12:37 PM EDT	Mesoscale Discussion	SPC	113 min
Jun 11, 3:54 PM EDT	Special Weather Statement	GSP	36 min
Jun 11, 5:08 PM EDT	Special Weather Statement	GSP	22 min
Jun 11, 5:23 PM EDT	Special Weather Statement	GSP	37 min
Jun 20, 2:17 PM EDT	Special Weather Statement	GSP	58 min
Jun 22, 6:48 PM EDT	Severe Thunderstorm Warning	GSP	54 min
Jun 25, 5:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 10, 7:43 PM EDT	Special Weather Statement	GSP	32 min
Jul 10, 8:08 PM EDT	Severe Thunderstorm Warning	GSP	19 min
Jul 10, 8:26 PM EDT	Special Weather Statement	GSP	34 min
Jul 13, 1:21 PM EDT	Mesoscale Discussion	SPC	84 min
Jul 15, 4:49 PM EDT	Special Weather Statement	GSP	41 min
Jul 16, 3:38 PM EDT	Severe Thunderstorm Warning	GSP	28 min
Jul 17, 1:47 PM EDT	Mesoscale Discussion	SPC	118 min
Jul 17, 6:19 PM EDT	Severe Thunderstorm Warning	GSP	41 min
Jul 17, 7:00 PM EDT	Severe Thunderstorm Warning	GSP	29 min
Jul 17, 7:08 PM EDT	Areal Flood Advisory	GSP	109 min
Jul 18, 4:48 PM EDT	Special Weather Statement	GSP	27 min
Jul 18, 5:30 PM EDT	Special Weather Statement	GSP	45 min
Jul 18, 5:38 PM EDT	Severe Thunderstorm Warning	GSP	52 min
Jul 19, 2:27 PM EDT	Heat Advisory	GSP	28 hr
Jul 19, 6:35 PM EDT	Severe Thunderstorm Warning	GSP	40 min
Jul 19, 7:15 PM EDT	Special Weather Statement	GSP	30 min
Jul 19, 7:48 PM EDT	Special Weather Statement	GSP	27 min
Jul 20, 12:57 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 2:49 PM EDT	Heat Advisory	GSP	29 hr
Jul 20, 6:28 PM EDT	Severe Thunderstorm Warning	GSP	35 min
Jul 21, 1:00 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 2:52 PM EDT	Heat Advisory	GSP	29 hr
Jul 21, 5:23 PM EDT	Severe Thunderstorm Warning	GSP	38 min
Jul 23, 1:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 3:58 PM EDT	Severe Thunderstorm Warning	GSP	29 min
Jul 23, 4:43 PM EDT	Special Weather Statement	GSP	32 min
Jul 23, 6:26 PM EDT	Special Weather Statement	GSP	34 min
Jul 25, 6:08 PM EDT	Special Weather Statement	GSP	37 min
Jul 30, 7:11 PM EDT	Special Weather Statement	GSP	49 min
Jul 30, 7:23 PM EDT	Special Weather Statement	GSP	52 min
Jul 31, 9:27 PM EDT	Special Weather Statement	GSP	48 min
Jul 31, 10:20 PM EDT	Special Weather Statement	GSP	25 min
Aug 2, 2:18 PM EDT	Mesoscale Discussion	SPC	57 min
Aug 3, 2:42 AM EDT	Areal Flood Advisory	GSP	3 hr
Aug 5, 1:37 PM EDT	Mesoscale Discussion	SPC	113 min
Aug 6, 2:08 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 6, 7:41 PM EDT	Special Weather Statement	GSP	34 min
Aug 6, 8:20 PM EDT	Special Weather Statement	GSP	25 min
Aug 13, 4:37 PM EDT	Special Weather Statement	GSP	23 min
Aug 13, 5:00 PM EDT	Special Weather Statement	GSP	45 min
Aug 13, 5:17 PM EDT	Areal Flood Advisory	GSP	3 hr
Aug 13, 5:32 PM EDT	Flash Flood Warning	GSP	3 hr
Aug 14, 3:43 AM EDT	Flash Flood Watch	GSP	41 hr
Aug 14, 4:39 PM EDT	Special Weather Statement	GSP	36 min
Aug 15, 6:10 PM EDT	Flash Flood Warning	GSP	2 hr
Aug 17, 3:28 PM EDT	Severe Thunderstorm Warning	GSP	32 min
Aug 17, 4:27 PM EDT	Special Weather Statement	GSP	33 min
Aug 22, 3:32 AM EDT	Dense Fog Advisory	GSP	5 hr
Aug 28, 6:35 PM EDT	Special Weather Statement	GSP	25 min
Aug 28, 6:39 PM EDT	Severe Thunderstorm Warning	GSP	29 min
Aug 31, 3:53 AM EDT	Flash Flood Watch	GSP	22 hr
Aug 31, 5:14 AM EDT	Special Weather Statement	GSP	46 min
Aug 31, 5:57 AM EDT	Special Weather Statement	GSP	48 min
Aug 31, 3:32 PM EDT	Areal Flood Advisory	GSP	4 hr
Aug 31, 3:41 PM EDT	Special Weather Statement	GSP	34 min
Aug 31, 3:54 PM EDT	Mesoscale Discussion	SPC	96 min
Sep 16, 4:28 AM EDT	Flood Watch	GSP	46 min
Sep 16, 5:14 AM EDT	Flash Flood Watch	GSP	39 hr
Sep 27, 5:21 AM EDT	Dense Fog Advisory	GSP	4 hr
Sep 29, 2:36 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 29, 3:05 PM EDT	Special Weather Statement	GSP	25 min
Sep 29, 3:29 PM EDT	Special Weather Statement	GSP	31 min
Sep 29, 3:57 PM EDT	Special Weather Statement	GSP	33 min
Oct 10, 4:46 PM EDT	Special Weather Statement	GSP	29 min
Oct 11, 3:53 PM EDT	Areal Flood Advisory	GSP	11 hr
Oct 12, 3:23 AM EDT	Areal Flood Advisory	GSP	6 hr
Oct 13, 2:33 AM EDT	Dense Fog Advisory	GSP	6 hr
Oct 17, 2:43 PM EDT	Frost Advisory	GSP	18 hr
Oct 27, 3:53 AM EDT	Dense Fog Advisory	GSP	6 hr
Oct 28, 2:13 PM EDT	Tropical Storm Warning	GSP	24 hr
Oct 28, 2:47 PM EDT	Wind Advisory	GSP	27 hr
Oct 29, 8:57 PM EDT	Special Weather Statement	GSP	48 min
Oct 29, 9:44 PM EDT	Special Weather Statement	GSP	46 min
Oct 30, 2:46 PM EDT	Frost Advisory	GSP	19 hr
Nov 1, 3:58 AM EST	Freeze Watch	GSP	7 hr
Nov 1, 3:58 AM EST	Freeze Warning	GSP	29 hr
Nov 2, 11:45 AM EST	Freeze Warning	GSP	21 hr
Nov 10, 2:30 PM EST	Flood Watch	GSP	47 hr
Nov 12, 5:49 AM EST	Flash Flood Warning	GSP	5 hr
Nov 12, 6:36 AM EST	Flash Flood Warning Considerable damage threat	GSP	4 hr
Nov 12, 10:21 AM EST	Areal Flood Warning	GSP	12 hr
Nov 12, 12:09 PM EST	River Flood Warning	GSP	39 hr
Nov 12, 10:33 PM EST	Areal Flood Warning	GSP	18 hr
Nov 13, 4:50 PM EST	Areal Flood Advisory	GSP	6 hr
Nov 26, 9:04 PM EST	Dense Fog Advisory	GSP	14 hr
Nov 30, 6:39 AM EST	Special Weather Statement	GSP	51 min
Nov 30, 7:29 AM EST	Special Weather Statement	GSP	31 min
Dec 4, 8:15 PM EST	Special Weather Statement	GSP	60 min
Dec 4, 8:59 PM EST	Special Weather Statement	GSP	31 min
Dec 14, 8:09 AM EST	Special Weather Statement	GSP	66 min
Dec 14, 8:38 AM EST	Special Weather Statement	GSP	52 min
Dec 15, 4:31 AM EST	Winter Weather Advisory	GSP	41 hr
Dec 17, 2:48 AM EST	Dense Fog Advisory	GSP	7 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	20
Tornado Warning	2
Severe Thunderstorm Watch	2
Tornado Watch	3
Mesoscale Discussion	19
Special Weather Statement	51
Flooding
Areal Flood Warning	3
Flash Flood Warning	4
River Flood Warning	2
Flash Flood Watch	6
Flood Watch	2
Areal Flood Advisory	16
Winter
Winter Weather Advisory	2
Heat
Heat Advisory	3
Cold
Freeze Warning	3
Freeze Watch	1
Frost Advisory	7
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	11
Tropical
Tropical Storm Warning	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 2019 2021

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.