Alert archive / South Carolina / Berkeley County

Weather alerts in Berkeley County, South Carolina, 2023

193 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Berkeley County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 193
Warnings: 37
Watches: 14
Advisories: 76
Busiest month: August42 alerts
Busiest day: August 30, 20239 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 5 tornado warnings covering Berkeley County in 2023 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 11 minutes after it went out.

Berkeley County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	2	60%	2	50%	11 min
Severe thunderstorm warnings	17	8	53%	2	50%	30 min
Flash flood warnings	2	2	0%	0

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Charleston, SC: tornado warnings	20	3	85%	8	75%	8 min
NWS Charleston, SC: severe thunderstorm warnings	96	60	38%	367	69%	23 min
NWS Charleston, SC: flash flood warnings	8	5	38%	18	67%	150 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, 1:04 AM EST	Dense Fog Advisory	CHS	11 hr
Jan 1, 2:55 PM EST	Dense Fog Advisory	CHS	20 hr
Jan 2, 10:16 PM EST	Dense Fog Advisory	CHS	12 hr
Jan 4, 8:36 AM EST	Tornado Watch	SPC	9 hr
Jan 4, 10:21 AM EST	Mesoscale Discussion	SPC	114 min
Jan 4, 11:49 AM EST	Special Weather Statement	CHS	41 min
Jan 6, 9:48 AM EST	River Flood Warning	CHS	35 days
Jan 18, 3:26 PM EST	Lake Wind Advisory	CHS	27 hr
Jan 19, 12:22 AM EST	Dense Fog Advisory	CHS	6 hr
Jan 22, 2:50 PM EST	Lake Wind Advisory	CHS	24 hr
Jan 24, 3:14 PM EST	Lake Wind Advisory	CHS	39 hr
Jan 30, 10:37 PM EST	Dense Fog Advisory	CHS	11 hr
Feb 1, 4:59 AM EST	Dense Fog Advisory	CHS	4 hr
Feb 5, 7:29 PM EST	Dense Fog Advisory	CHS	11 hr
Feb 11, 3:35 AM EST	Lake Wind Advisory	CHS	24 hr
Feb 11, 9:43 PM EST	Areal Flood Advisory	CHS	3 hr
Feb 13, 7:15 AM EST	River Flood Warning	CHS	21 days
Feb 17, 10:45 AM EST	Lake Wind Advisory	CHS	19 hr
Feb 27, 12:30 AM EST	Dense Fog Advisory	CHS	9 hr
Mar 2, 3:05 PM EST	Lake Wind Advisory	CHS	18 hr
Mar 3, 2:58 AM EST	Wind Advisory	CHS	21 hr
Mar 4, 12:12 AM EST	Wind Advisory	CHS	3 hr
Mar 7, 2:55 AM EST	Lake Wind Advisory	CHS	28 hr
Mar 13, 7:36 PM EDT	Freeze Watch	CHS	20 hr
Mar 14, 3:07 PM EDT	Freeze Watch	CHS	24 hr
Mar 14, 3:07 PM EDT	Freeze Warning	CHS	18 hr
Mar 15, 3:17 PM EDT	Freeze Warning	CHS	18 hr
Mar 18, 3:44 PM EDT	Freeze Watch	CHS	24 hr
Mar 19, 3:25 PM EDT	Freeze Watch	CHS	24 hr
Mar 20, 3:05 PM EDT	Freeze Warning	CHS	18 hr
Mar 23, 1:00 AM EDT	Dense Fog Advisory	CHS	8 hr
Mar 26, 6:04 AM EDT	Mesoscale Discussion	SPC	116 min
Mar 27, 4:38 AM EDT	Special Weather Statement	CHS	22 min
Mar 29, 12:55 AM EDT	Lake Wind Advisory	CHS	5 hr
Mar 31, 3:43 PM EDT	Lake Wind Advisory	CHS	26 hr
Apr 7, 3:06 PM EDT	Lake Wind Advisory	CHS	57 hr
Apr 9, 9:52 AM EDT	River Flood Warning	CHS	21 days
Apr 15, 5:27 AM EDT	Dense Fog Advisory	CHS	4 hr
Apr 22, 12:46 PM EDT	Mesoscale Discussion	SPC	119 min
Apr 22, 5:33 PM EDT	Special Weather Statement	CHS	42 min
Apr 22, 5:38 PM EDT	Mesoscale Discussion	SPC	97 min
Apr 29, 4:33 PM EDT	Lake Wind Advisory	CHS	27 hr
Apr 29, 8:47 PM EDT	River Flood Warning	CHS	21 days
Apr 30, 12:19 PM EDT	Special Weather Statement	CHS	41 min
Apr 30, 12:55 PM EDT	Special Weather Statement	CHS	50 min
May 1, 12:06 AM EDT	Lake Wind Advisory	CHS	20 hr
May 2, 3:10 AM EDT	Lake Wind Advisory	CHS	20 hr
May 3, 3:21 AM EDT	Lake Wind Advisory	CHS	17 hr
May 9, 6:08 PM EDT	Special Weather Statement	CHS	52 min
May 9, 7:14 PM EDT	Special Weather Statement	CHS	31 min
May 9, 7:44 PM EDT	Severe Thunderstorm Warning	CHS	61 min
May 9, 8:46 PM EDT	Severe Thunderstorm Warning	CHS	59 min
May 9, 10:19 PM EDT	Areal Flood Advisory	CHS	2 hr
May 17, 6:39 PM EDT	Areal Flood Advisory	CHS	2 hr
May 18, 9:37 AM EDT	Special Weather Statement	CHS	38 min
May 18, 10:10 AM EDT	Special Weather Statement	CHS	35 min
May 25, 3:19 PM EDT	Lake Wind Advisory	CHS	28 hr
May 26, 3:37 PM EDT	Wind Advisory	CHS	25 hr
Jun 6, 5:55 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 6, 7:15 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Jun 7, 2:58 PM EDT	Special Weather Statement	CHS	47 min
Jun 7, 3:23 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 5:03 PM EDT	Severe Thunderstorm Warning	CHS	57 min
Jun 11, 5:38 PM EDT	Special Weather Statement	CHS	37 min
Jun 12, 2:25 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 18, 2:25 PM EDT	Special Weather Statement	CHS	50 min
Jun 18, 4:17 PM EDT	Special Weather Statement	CHS	28 min
Jun 19, 11:28 AM EDT	Severe Thunderstorm Warning	CHS	62 min
Jun 19, 12:25 PM EDT	Special Weather Statement	CHS	50 min
Jun 19, 1:18 PM EDT	Special Weather Statement	CHS	42 min
Jun 19, 1:58 PM EDT	Special Weather Statement	CHS	47 min
Jun 21, 1:33 PM EDT	Special Weather Statement	CHS	27 min
Jun 21, 2:04 PM EDT	Special Weather Statement	CHS	41 min
Jun 21, 2:34 PM EDT	Severe Thunderstorm Warning	CHS	56 min
Jun 21, 9:00 PM EDT	Special Weather Statement	CHS	45 min
Jun 22, 9:50 AM EDT	River Flood Warning	CHS	21 days
Jun 23, 3:31 AM EDT	Areal Flood Advisory	CHS	36 min
Jun 26, 4:55 PM EDT	Mesoscale Discussion	SPC	95 min
Jun 27, 12:15 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 2:12 AM EDT	Special Weather Statement	CHS	48 min
Jun 27, 2:59 AM EDT	Special Weather Statement	CHS	46 min
Jul 2, 3:28 AM EDT	Heat Advisory	CHS	15 hr
Jul 3, 3:21 AM EDT	Heat Advisory	CHS	15 hr
Jul 4, 5:01 PM EDT	Severe Thunderstorm Warning	CHS	59 min
Jul 5, 1:04 PM EDT	Areal Flood Advisory	CHS	116 min
Jul 5, 2:38 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 3:48 PM EDT	Areal Flood Advisory	CHS	117 min
Jul 5, 4:35 PM EDT	Special Weather Statement	CHS	40 min
Jul 7, 4:41 PM EDT	Areal Flood Advisory	CHS	46 min
Jul 7, 5:37 PM EDT	Special Weather Statement	CHS	38 min
Jul 8, 5:33 PM EDT	Areal Flood Advisory	CHS	117 min
Jul 15, 6:38 PM EDT	Special Weather Statement	CHS	37 min
Jul 16, 8:47 PM EDT	Areal Flood Advisory	CHS	2 hr
Jul 19, 5:18 PM EDT	Special Weather Statement	CHS	27 min
Jul 19, 5:42 PM EDT	Special Weather Statement	CHS	48 min
Jul 20, 6:12 PM EDT	Special Weather Statement	CHS	48 min
Jul 20, 6:37 PM EDT	Severe Thunderstorm Warning	CHS	53 min
Jul 20, 6:43 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 20, 7:29 PM EDT	Severe Thunderstorm Warning	CHS	61 min
Jul 20, 9:14 PM EDT	Special Weather Statement	CHS	46 min
Jul 20, 9:45 PM EDT	Severe Thunderstorm Warning	CHS	60 min
Jul 20, 10:39 PM EDT	Severe Thunderstorm Warning	CHS	66 min
Jul 21, 7:23 PM EDT	Special Weather Statement	CHS	52 min
Jul 21, 11:16 PM EDT	Special Weather Statement	CHS	44 min
Jul 21, 11:59 PM EDT	Special Weather Statement	CHS	46 min
Jul 22, 6:57 PM EDT	Tornado Warning	CHS	33 min
Jul 22, 7:20 PM EDT	Special Weather Statement	CHS	40 min
Jul 23, 2:59 PM EDT	Areal Flood Advisory	CHS	3 hr
Jul 23, 4:37 PM EDT	Areal Flood Advisory	CHS	83 min
Jul 23, 5:32 PM EDT	Areal Flood Advisory	CHS	2 hr
Jul 23, 6:26 PM EDT	Areal Flood Advisory	CHS	3 hr
Jul 23, 6:52 PM EDT	Areal Flood Advisory	CHS	3 hr
Jul 23, 7:37 PM EDT	Special Weather Statement	CHS	38 min
Jul 30, 8:48 PM EDT	Special Weather Statement	CHS	27 min
Jul 31, 8:49 PM EDT	Special Weather Statement	CHS	26 min
Jul 31, 9:14 PM EDT	Special Weather Statement	CHS	31 min
Jul 31, 9:44 PM EDT	Severe Thunderstorm Warning	CHS	61 min
Aug 1, 2:58 PM EDT	Mesoscale Discussion	SPC	92 min
Aug 6, 8:21 PM EDT	Special Weather Statement	CHS	39 min
Aug 7, 3:16 AM EDT	Heat Advisory	CHS	16 hr
Aug 7, 7:27 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 7:42 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
Aug 7, 7:49 PM EDT	Severe Thunderstorm Warning	CHS	56 min
Aug 7, 8:47 PM EDT	Special Weather Statement	CHS	28 min
Aug 8, 3:06 AM EDT	Heat Advisory	CHS	17 hr
Aug 11, 12:54 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 2:13 PM EDT	Special Weather Statement	CHS	47 min
Aug 12, 8:24 PM EDT	Heat Advisory	CHS	22 hr
Aug 13, 4:28 PM EDT	Areal Flood Advisory	CHS	2 hr
Aug 13, 8:48 PM EDT	Heat Advisory	CHS	22 hr
Aug 14, 6:11 PM EDT	Areal Flood Advisory	CHS	94 min
Aug 14, 8:31 PM EDT	Heat Advisory	CHS	22 hr
Aug 15, 3:52 PM EDT	Areal Flood Advisory	CHS	62 min
Aug 15, 4:28 PM EDT	Severe Thunderstorm Warning	CHS	62 min
Aug 15, 7:20 PM EDT	Special Weather Statement	CHS	40 min
Aug 16, 5:08 PM EDT	Areal Flood Advisory	CHS	3 hr
Aug 16, 5:58 PM EDT	Areal Flood Advisory	CHS	2 hr
Aug 19, 4:08 PM EDT	Areal Flood Advisory	CHS	82 min
Aug 19, 5:24 PM EDT	Areal Flood Advisory	CHS	81 min
Aug 19, 6:35 PM EDT	Areal Flood Advisory	CHS	85 min
Aug 25, 4:25 PM EDT	Areal Flood Advisory	CHS	56 min
Aug 28, 5:07 PM EDT	Tropical Storm Watch	CHS	18 hr
Aug 29, 5:04 AM EDT	Flood Watch	CHS	45 hr
Aug 29, 11:02 AM EDT	Tropical Storm Warning	CHS	48 hr
Aug 29, 5:12 PM EDT	Hurricane Watch	CHS	24 hr
Aug 30, 4:23 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 10:11 AM EDT	Mesoscale Discussion	SPC	3 hr
Aug 30, 10:51 AM EDT	Tornado Watch	SPC	11 hr
Aug 30, 2:14 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 3:29 PM EDT	Tornado Warning	CHS	15 min
Aug 30, 3:35 PM EDT	Tornado Warning Tornado observed	CHS	25 min
Aug 30, 4:48 PM EDT	Tornado Warning	CHS	27 min
Aug 30, 5:16 PM EDT	Tornado Warning	CHS	29 min
Aug 30, 6:57 PM EDT	Areal Flood Advisory	CHS	5 hr
Aug 30, 9:42 PM EDT	River Flood Warning	CHS	21 days
Aug 31, 2:42 AM EDT	Lake Wind Advisory	CHS	9 hr
Sep 10, 3:19 PM EDT	Areal Flood Advisory	CHS	62 min
Sep 10, 6:43 PM EDT	Special Weather Statement	CHS	47 min
Sep 10, 7:26 PM EDT	Special Weather Statement	CHS	49 min
Sep 11, 3:49 PM EDT	Special Weather Statement	CHS	41 min
Sep 11, 4:06 PM EDT	Severe Thunderstorm Warning	CHS	54 min
Sep 11, 4:26 PM EDT	Special Weather Statement	CHS	34 min
Sep 11, 4:52 PM EDT	Special Weather Statement	CHS	38 min
Sep 11, 5:22 PM EDT	Severe Thunderstorm Warning	CHS	53 min
Sep 17, 1:46 PM EDT	Areal Flood Advisory	CHS	119 min
Sep 17, 4:09 PM EDT	Severe Thunderstorm Warning	CHS	66 min
Sep 17, 4:46 PM EDT	Areal Flood Advisory	CHS	3 hr
Sep 22, 3:30 AM EDT	Lake Wind Advisory	CHS	34 hr
Oct 7, 5:59 PM EDT	Lake Wind Advisory	CHS	10 hr
Oct 20, 1:51 PM EDT	Mesoscale Discussion	SPC	114 min
Oct 20, 6:38 PM EDT	Special Weather Statement	CHS	52 min
Oct 20, 7:55 PM EDT	Special Weather Statement	CHS	35 min
Oct 31, 3:33 AM EDT	Freeze Watch	CHS	23 hr
Oct 31, 3:33 AM EDT	Lake Wind Advisory	CHS	51 hr
Nov 1, 3:01 AM EDT	Freeze Warning	CHS	31 hr
Nov 2, 3:46 PM EDT	Frost Advisory	CHS	18 hr
Nov 27, 3:26 AM EST	Freeze Watch	CHS	23 hr
Nov 28, 2:52 AM EST	Freeze Warning	CHS	30 hr
Dec 10, 3:29 AM EST	Lake Wind Advisory	CHS	24 hr
Dec 10, 10:44 PM EST	Special Weather Statement	CHS	46 min
Dec 10, 11:26 PM EST	Special Weather Statement	CHS	49 min
Dec 16, 7:26 AM EST	Lake Wind Advisory	CHS	8 hr
Dec 16, 3:02 PM EST	Wind Advisory	CHS	36 hr
Dec 16, 3:05 PM EST	Flood Watch	CHS	26 hr
Dec 17, 8:15 AM EST	Areal Flood Advisory	CHS	5 hr
Dec 17, 9:33 AM EST	Flash Flood Warning Considerable damage threat	CHS	5 hr
Dec 17, 2:58 PM EST	Flash Flood Warning Considerable damage threat	CHS	3 hr
Dec 17, 3:16 PM EST	Areal Flood Advisory	CHS	104 min
Dec 17, 5:18 PM EST	Areal Flood Advisory	CHS	102 min
Dec 17, 9:35 PM EST	Lake Wind Advisory	CHS	8 hr
Dec 18, 6:15 AM EST	Lake Wind Advisory	CHS	24 hr
Dec 29, 11:58 AM EST	Lake Wind Advisory	CHS	8 hr
Dec 30, 10:14 AM EST	River Flood Warning	CHS	53 days

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	17
Tornado Warning	5
Severe Thunderstorm Watch	2
Tornado Watch	2
Mesoscale Discussion	17
Special Weather Statement	49
Flooding
Flash Flood Warning	2
River Flood Warning	7
Flood Watch	2
Areal Flood Advisory	30
Heat
Heat Advisory	7
Cold
Freeze Warning	5
Freeze Watch	6
Frost Advisory	1
Wind and dust
Lake Wind Advisory	24
Wind Advisory	4
Fog and smoke
Dense Fog Advisory	10
Tropical
Tropical Storm Warning	1
Hurricane Watch	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 2022 2024

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.