Alert archive / South Carolina / Colleton County

Weather alerts in Colleton County, South Carolina, 2022

165 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Colleton County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts: 165
Warnings: 57
Watches: 18
Advisories: 41
Busiest month: July32 alerts
Busiest day: April 5, 202212 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 6 tornado warnings covering Colleton County in 2022 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 9 minutes after it went out.

Colleton County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	3	50%	3	67%	9 min
Severe thunderstorm warnings	42	26	38%	88	67%	23 min
Flash flood warnings	1	1	0%	0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Charleston, SC: tornado warnings	16	8	50%	33	79%	27 min
NWS Charleston, SC: severe thunderstorm warnings	130	75	42%	389	70%	21 min
NWS Charleston, SC: flash flood warnings	7	4	43%	13	62%	356 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, 4:10 PM EST	Wind Advisory	CHS	23 hr
Jan 2, 9:26 PM EST	Mesoscale Discussion	SPC	64 min
Jan 2, 9:53 PM EST	Tornado Watch	SPC	5 hr
Jan 3, 12:17 AM EST	Mesoscale Discussion	SPC	118 min
Jan 9, 9:27 AM EST	River Flood Warning	CHS	3 days
Jan 19, 3:50 PM EST	Winter Storm Watch	CHS	24 hr
Jan 20, 3:29 PM EST	Winter Weather Advisory	CHS	40 hr
Jan 21, 3:32 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 9, 2:07 AM EST	Freezing Fog Advisory	CHS	6 hr
Mar 11, 6:52 PM EST	Wind Advisory	CHS	23 hr
Mar 12, 3:47 AM EST	Mesoscale Discussion	SPC	118 min
Mar 12, 3:55 AM EST	Freeze Warning	CHS	30 hr
Mar 13, 3:40 AM EDT	Freeze Watch	CHS	12 hr
Mar 13, 3:11 PM EDT	Freeze Warning	CHS	18 hr
Mar 16, 11:19 AM EDT	Mesoscale Discussion	SPC	116 min
Mar 16, 9:18 PM EDT	Special Weather Statement	CHS	42 min
Mar 17, 5:42 AM EDT	Dense Fog Advisory	CHS	4 hr
Mar 19, 3:05 PM EDT	Mesoscale Discussion	SPC	115 min
Mar 25, 3:32 PM EDT	Fire Weather Watch	CHS	12 hr
Mar 26, 3:25 AM EDT	Red Flag Warning	CHS	17 hr
Apr 5, 2:50 PM EDT	Mesoscale Discussion	SPC	115 min
Apr 5, 3:15 PM EDT	Tornado Watch	SPC	6 hr
Apr 5, 4:22 PM EDT	Mesoscale Discussion	SPC	83 min
Apr 5, 4:31 PM EDT	Severe Thunderstorm Warning	CHS	47 min
Apr 5, 4:52 PM EDT	Tornado Warning	CHS	23 min
Apr 5, 5:17 PM EDT	Tornado Warning	CHS	43 min
Apr 5, 6:27 PM EDT	Tornado Warning Tornado observed	CHS	48 min
Apr 5, 6:30 PM EDT	Mesoscale Discussion	SPC	90 min
Apr 5, 6:41 PM EDT	Severe Thunderstorm Warning	CHS	49 min
Apr 5, 6:45 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Apr 5, 6:59 PM EDT	Tornado Warning	CHS	46 min
Apr 5, 7:14 PM EDT	Severe Thunderstorm Warning	CHS	46 min
Apr 6, 4:02 PM EDT	Mesoscale Discussion	SPC	88 min
Apr 6, 4:21 PM EDT	Tornado Watch	SPC	8 hr
Apr 6, 5:07 PM EDT	Severe Thunderstorm Warning	CHS	53 min
Apr 6, 5:29 PM EDT	Severe Thunderstorm Warning	CHS	61 min
Apr 6, 5:43 PM EDT	Severe Thunderstorm Warning	CHS	62 min
Apr 6, 5:54 PM EDT	Severe Thunderstorm Warning	CHS	66 min
Apr 6, 6:35 PM EDT	Severe Thunderstorm Warning	CHS	55 min
Apr 6, 6:45 PM EDT	Severe Thunderstorm Warning	CHS	13 min
Apr 6, 7:55 PM EDT	Severe Thunderstorm Warning	CHS	49 min
Apr 6, 8:30 PM EDT	Severe Thunderstorm Warning	CHS	45 min
Apr 6, 10:13 PM EDT	Special Weather Statement	CHS	47 min
Apr 6, 10:40 PM EDT	Severe Thunderstorm Warning	CHS	35 min
Apr 6, 10:53 PM EDT	Severe Thunderstorm Warning	CHS	67 min
Apr 6, 10:59 PM EDT	Tornado Warning	CHS	18 min
Apr 9, 5:02 PM EDT	Frost Advisory	CHS	15 hr
Apr 10, 9:32 AM EDT	River Flood Warning	CHS	21 days
Apr 26, 4:39 PM EDT	Special Weather Statement	CHS	51 min
May 1, 5:59 PM EDT	Special Weather Statement	CHS	31 min
May 1, 6:01 PM EDT	Severe Thunderstorm Warning	CHS	28 min
May 3, 6:40 PM EDT	Special Weather Statement	CHS	35 min
May 6, 3:22 PM EDT	Mesoscale Discussion	SPC	113 min
May 6, 3:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 6, 5:41 PM EDT	Severe Thunderstorm Warning	CHS	29 min
May 6, 5:44 PM EDT	Severe Thunderstorm Warning	CHS	61 min
May 14, 4:51 AM EDT	Dense Fog Advisory	CHS	4 hr
May 21, 12:56 PM EDT	Mesoscale Discussion	SPC	2 hr
May 23, 2:29 PM EDT	Mesoscale Discussion	SPC	61 min
May 23, 3:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
May 23, 4:43 PM EDT	Mesoscale Discussion	SPC	2 hr
May 23, 6:26 PM EDT	Severe Thunderstorm Warning	CHS	64 min
May 23, 7:02 PM EDT	Mesoscale Discussion	SPC	118 min
May 23, 7:06 PM EDT	Severe Thunderstorm Warning	CHS	54 min
May 27, 5:00 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 5:21 PM EDT	Special Weather Statement	CHS	24 min
Jun 3, 5:24 PM EDT	Severe Thunderstorm Warning	CHS	35 min
Jun 3, 6:02 PM EDT	Special Weather Statement	CHS	28 min
Jun 8, 5:10 PM EDT	Severe Thunderstorm Warning	CHS	37 min
Jun 9, 3:01 PM EDT	Severe Thunderstorm Warning	CHS	59 min
Jun 13, 3:25 AM EDT	Heat Advisory	CHS	16 hr
Jun 13, 3:28 PM EDT	Heat Advisory	CHS	28 hr
Jun 14, 11:21 AM EDT	Mesoscale Discussion	SPC	54 min
Jun 14, 11:59 AM EDT	Severe Thunderstorm Warning	CHS	46 min
Jun 14, 12:17 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 3:30 AM EDT	Heat Advisory	CHS	16 hr
Jun 16, 4:00 PM EDT	Heat Advisory	CHS	26 hr
Jun 16, 7:45 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Jun 17, 6:39 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 17, 8:15 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Jun 17, 8:45 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CHS	60 min
Jun 17, 9:10 PM EDT	Severe Thunderstorm Warning	CHS	65 min
Jun 17, 9:27 PM EDT	Severe Thunderstorm Warning	CHS	48 min
Jun 23, 10:37 PM EDT	Special Weather Statement	CHS	38 min
Jun 29, 1:25 PM EDT	Areal Flood Advisory	CHS	110 min
Jul 1, 11:22 AM EDT	Flood Watch	CHS	14 hr
Jul 1, 6:56 PM EDT	Areal Flood Advisory	CHS	5 hr
Jul 3, 5:42 PM EDT	Severe Thunderstorm Warning	CHS	63 min
Jul 4, 3:18 PM EDT	Severe Thunderstorm Warning	CHS	41 min
Jul 4, 3:34 PM EDT	Special Weather Statement	CHS	26 min
Jul 4, 4:02 PM EDT	Special Weather Statement	CHS	43 min
Jul 7, 3:15 AM EDT	Heat Advisory	CHS	14 hr
Jul 8, 4:23 PM EDT	Severe Thunderstorm Warning	CHS	52 min
Jul 8, 5:27 PM EDT	Special Weather Statement	CHS	48 min
Jul 8, 5:48 PM EDT	Severe Thunderstorm Warning	CHS	57 min
Jul 9, 5:29 PM EDT	Severe Thunderstorm Warning	CHS	61 min
Jul 10, 3:30 AM EDT	Flood Watch	CHS	18 hr
Jul 10, 5:10 PM EDT	Areal Flood Advisory	CHS	2 hr
Jul 13, 1:30 PM EDT	Severe Thunderstorm Warning	CHS	45 min
Jul 13, 1:57 PM EDT	Mesoscale Discussion	SPC	63 min
Jul 13, 2:23 PM EDT	Special Weather Statement	CHS	37 min
Jul 13, 3:24 PM EDT	Severe Thunderstorm Warning	CHS	51 min
Jul 13, 3:33 PM EDT	Special Weather Statement	CHS	27 min
Jul 13, 3:42 PM EDT	Severe Thunderstorm Warning	CHS	48 min
Jul 13, 3:58 PM EDT	Severe Thunderstorm Warning	CHS	34 min
Jul 13, 4:32 PM EDT	Areal Flood Advisory	CHS	88 min
Jul 14, 6:27 PM EDT	Special Weather Statement	CHS	33 min
Jul 14, 6:32 PM EDT	Areal Flood Advisory	CHS	5 hr
Jul 14, 7:25 PM EDT	Areal Flood Advisory	CHS	95 min
Jul 14, 8:21 PM EDT	Areal Flood Advisory	CHS	2 hr
Jul 19, 6:13 PM EDT	Severe Thunderstorm Warning	CHS	62 min
Jul 20, 1:58 PM EDT	Severe Thunderstorm Warning	CHS	62 min
Jul 20, 3:44 PM EDT	Areal Flood Advisory	CHS	2 hr
Jul 21, 12:04 PM EDT	Mesoscale Discussion	SPC	116 min
Jul 23, 7:12 PM EDT	Severe Thunderstorm Warning	CHS	51 min
Jul 23, 7:55 PM EDT	Special Weather Statement	CHS	35 min
Jul 24, 3:26 PM EDT	Special Weather Statement	CHS	49 min
Aug 3, 3:48 PM EDT	Severe Thunderstorm Warning	CHS	57 min
Aug 12, 5:08 PM EDT	Special Weather Statement	CHS	37 min
Aug 15, 7:49 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 18, 5:25 PM EDT	Areal Flood Advisory	CHS	3 hr
Aug 19, 4:42 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 19, 7:15 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Aug 20, 6:53 PM EDT	Special Weather Statement	CHS	52 min
Aug 20, 7:57 PM EDT	Special Weather Statement	CHS	33 min
Aug 21, 2:53 PM EDT	Special Weather Statement	CHS	37 min
Aug 22, 3:40 PM EDT	Areal Flood Advisory	CHS	4 hr
Aug 23, 5:23 PM EDT	Areal Flood Advisory	CHS	77 min
Aug 29, 12:07 PM EDT	Areal Flood Advisory	CHS	5 hr
Aug 29, 1:51 PM EDT	Areal Flood Advisory	CHS	2 hr
Aug 30, 1:44 AM EDT	Areal Flood Advisory	CHS	2 hr
Sep 1, 12:10 PM EDT	Special Weather Statement	CHS	35 min
Sep 1, 12:37 PM EDT	Special Weather Statement	CHS	23 min
Sep 1, 12:59 PM EDT	Special Weather Statement	CHS	31 min
Sep 1, 1:29 PM EDT	Special Weather Statement	CHS	31 min
Sep 1, 1:51 PM EDT	Areal Flood Advisory	CHS	84 min
Sep 1, 2:36 PM EDT	Special Weather Statement	CHS	24 min
Sep 1, 3:13 PM EDT	Areal Flood Advisory	CHS	62 min
Sep 8, 3:58 PM EDT	Areal Flood Advisory	CHS	2 hr
Sep 8, 4:18 PM EDT	Areal Flood Advisory	CHS	93 min
Sep 9, 10:46 PM EDT	Areal Flood Advisory	CHS	119 min
Sep 27, 11:12 AM EDT	Tropical Storm Watch	CHS	66 hr
Sep 27, 11:16 PM EDT	Tropical Storm Warning	CHS	69 hr
Sep 28, 3:31 PM EDT	Flood Watch	CHS	52 hr
Sep 30, 10:35 AM EDT	Flash Flood Warning	CHS	5 hr
Sep 30, 11:35 AM EDT	Areal Flood Advisory	CHS	4 hr
Oct 19, 11:05 AM EDT	Frost Advisory	CHS	22 hr
Oct 19, 3:23 PM EDT	Freeze Warning	CHS	18 hr
Oct 21, 3:03 AM EDT	Frost Advisory	CHS	6 hr
Oct 25, 12:20 AM EDT	Dense Fog Advisory	CHS	11 hr
Nov 1, 4:59 AM EDT	Dense Fog Advisory	CHS	4 hr
Nov 10, 12:47 PM EST	Tornado Watch	SPC	6 hr
Nov 10, 5:18 PM EST	Tornado Warning	CHS	27 min
Nov 10, 5:48 PM EST	Mesoscale Discussion	SPC	57 min
Nov 10, 6:28 PM EST	Tornado Watch	SPC	6 hr
Nov 10, 10:43 PM EST	Mesoscale Discussion	SPC	2 hr
Nov 11, 12:42 AM EST	Tornado Watch	SPC	8 hr
Nov 11, 1:03 AM EST	Special Weather Statement	CHS	12 min
Nov 16, 2:50 PM EST	Freeze Watch	CHS	12 hr
Nov 17, 2:51 AM EST	Freeze Warning	CHS	29 hr
Dec 7, 3:03 AM EST	Dense Fog Advisory	CHS	6 hr
Dec 22, 3:06 PM EST	Wind Advisory	CHS	27 hr
Dec 22, 3:10 PM EST	Wind Chill Advisory	CHS	46 hr
Dec 24, 3:18 PM EST	Wind Chill Advisory	CHS	19 hr
Dec 31, 4:26 AM EST	Dense Fog Advisory	CHS	5 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	42
Tornado Warning	6
Severe Thunderstorm Watch	4
Tornado Watch	6
Mesoscale Discussion	23
Special Weather Statement	26
Flooding
Flash Flood Warning	1
River Flood Warning	2
Flood Watch	3
Areal Flood Advisory	20
Winter
Winter Storm Watch	1
Winter Weather Advisory	1
Heat
Heat Advisory	5
Cold
Freeze Warning	4
Freeze Watch	2
Frost Advisory	3
Wind Chill Advisory	2
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	6
Freezing Fog Advisory	1
Tropical
Tropical Storm Warning	1
Tropical Storm Watch	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 2021 2023

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.