Alert archive / South Carolina / Colleton County
Weather alerts in Colleton County, South Carolina, 2023
138 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 138
- Warnings
- 45
- Watches
- 12
- Advisories
- 32
- Busiest month
- August41 alerts
- Busiest day
- August 30, 20238 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Colleton County in 2023 had a tornado report inside them.
Colleton County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 27 | 21 | 22% | 84 | 69% | 21 min |
| Flash flood warnings | 4 | 3 | 25% | 2 | 100% | 92 min |
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, 10:58 AM EST | Special Weather Statement | CHS | 47 min |
| Jan 4, 11:34 AM EST | Severe Thunderstorm Warning | CHS | 41 min |
| Jan 4, 11:53 AM EST | Special Weather Statement | CHS | 37 min |
| Jan 28, 9:34 PM EST | River Flood Warning | CHS | 13 days |
| 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, 9:43 PM EST | Areal Flood Advisory | CHS | 3 hr |
| Feb 12, 2:40 AM EST | River Flood Warning | CHS | 12 days |
| Mar 3, 2:58 AM EST | Wind Advisory | CHS | 21 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 |
| Apr 15, 5:27 AM EDT | Dense Fog Advisory | CHS | 4 hr |
| Apr 22, 12:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 9, 8:46 PM EDT | Severe Thunderstorm Warning | CHS | 59 min |
| May 17, 4:40 PM EDT | Special Weather Statement | CHS | 50 min |
| May 18, 2:14 PM EDT | Areal Flood Advisory | CHS | 76 min |
| Jun 6, 5:05 PM EDT | Special Weather Statement | CHS | 25 min |
| Jun 6, 5:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 7:48 PM EDT | Special Weather Statement | CHS | 27 min |
| Jun 7, 5:43 PM EDT | Special Weather Statement | CHS | 47 min |
| Jun 7, 6:00 PM EDT | Severe Thunderstorm Warning | CHS | 45 min |
| Jun 7, 7:53 PM EDT | Special Weather Statement | CHS | 37 min |
| Jun 7, 8:06 PM EDT | Special Weather Statement | CHS | 39 min |
| Jun 7, 8:12 PM EDT | Severe Thunderstorm Warning | CHS | 43 min |
| Jun 11, 4:30 PM EDT | Severe Thunderstorm Warning | CHS | 60 min |
| Jun 11, 5:03 PM EDT | Severe Thunderstorm Warning | CHS | 57 min |
| Jun 12, 2:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 12, 6:58 PM EDT | Severe Thunderstorm Warning | CHS | 47 min |
| Jun 12, 7:24 PM EDT | Severe Thunderstorm Warning | CHS | 49 min |
| Jun 14, 8:09 PM EDT | Severe Thunderstorm Warning | CHS | 66 min |
| Jun 19, 10:35 AM EDT | Special Weather Statement | CHS | 25 min |
| Jun 19, 10:44 AM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Jun 19, 11:28 AM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Jun 23, 5:29 PM EDT | Special Weather Statement | CHS | 46 min |
| Jun 23, 5:59 PM EDT | Special Weather Statement | CHS | 46 min |
| Jun 26, 4:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 26, 8:33 PM EDT | Special Weather Statement | CHS | 27 min |
| Jun 27, 10:15 AM EDT | River Flood Warning | CHS | 21 days |
| Jul 2, 3:28 AM EDT | Heat Advisory | CHS | 15 hr |
| Jul 3, 3:21 AM EDT | Heat Advisory | CHS | 15 hr |
| Jul 4, 4:48 PM EDT | Severe Thunderstorm Warning | CHS | 45 min |
| Jul 5, 2:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 6:48 PM EDT | Special Weather Statement | CHS | 42 min |
| Jul 10, 12:41 PM EDT | Areal Flood Advisory | CHS | 71 min |
| Jul 19, 5:02 PM EDT | Special Weather Statement | CHS | 28 min |
| Jul 19, 5:34 PM EDT | Special Weather Statement | CHS | 26 min |
| Jul 19, 5:42 PM EDT | Special Weather Statement | CHS | 48 min |
| Jul 20, 5:59 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 20, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 9:22 PM EDT | Severe Thunderstorm Warning | CHS | 68 min |
| Jul 20, 9:52 PM EDT | Special Weather Statement | CHS | 38 min |
| Jul 20, 10:10 PM EDT | Severe Thunderstorm Warning | CHS | 65 min |
| Jul 23, 10:06 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 23, 4:09 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Jul 23, 5:23 PM EDT | Special Weather Statement | CHS | 52 min |
| Jul 23, 6:15 PM EDT | Areal Flood Advisory | CHS | 90 min |
| Jul 30, 7:50 PM EDT | Severe Thunderstorm Warning | CHS | 27 min |
| Jul 30, 8:02 PM EDT | Severe Thunderstorm Warning | CHS | 43 min |
| Jul 30, 8:06 PM EDT | Special Weather Statement | CHS | 24 min |
| Jul 30, 8:30 PM EDT | Severe Thunderstorm Warning | CHS | 38 min |
| Jul 30, 8:39 PM EDT | Special Weather Statement | CHS | 36 min |
| Jul 30, 8:45 PM EDT | Severe Thunderstorm Warning | CHS | 33 min |
| Jul 30, 9:25 PM EDT | Special Weather Statement | CHS | 35 min |
| Jul 31, 9:44 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Jul 31, 10:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 1, 2:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 6, 6:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| 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, 8:42 PM EDT | Severe Thunderstorm Warning | CHS | 63 min |
| Aug 7, 9:56 PM EDT | Severe Thunderstorm Warning | CHS | 33 min |
| Aug 8, 3:06 AM EDT | Heat Advisory | CHS | 17 hr |
| Aug 8, 8:18 PM EDT | Severe Thunderstorm Warning | CHS | 57 min |
| Aug 11, 12:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 1:00 PM EDT | Severe Thunderstorm Warning | CHS | 45 min |
| Aug 11, 1:44 PM EDT | Special Weather Statement | CHS | 46 min |
| Aug 12, 8:24 PM EDT | Heat Advisory | CHS | 22 hr |
| Aug 13, 8:48 PM EDT | Heat Advisory | CHS | 22 hr |
| Aug 14, 8:31 PM EDT | Heat Advisory | CHS | 22 hr |
| Aug 15, 5:53 PM EDT | Special Weather Statement | CHS | 37 min |
| Aug 15, 6:17 PM EDT | Special Weather Statement | CHS | 43 min |
| Aug 15, 6:40 PM EDT | Special Weather Statement | CHS | 50 min |
| Aug 15, 7:27 PM EDT | Special Weather Statement | CHS | 48 min |
| Aug 16, 5:58 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Aug 16, 7:09 PM EDT | Areal Flood Advisory | CHS | 100 min |
| Aug 16, 7:35 PM EDT | Flash Flood Warning | CHS | 5 hr |
| Aug 16, 8:10 PM EDT | Areal Flood Advisory | CHS | 39 min |
| Aug 16, 8:39 PM EDT | Flash Flood Warning | CHS | 4 hr |
| Aug 16, 9:34 PM EDT | Areal Flood Advisory | CHS | 116 min |
| Aug 17, 1:09 PM EDT | Areal Flood Warning | CHS | 23 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 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, 3:52 PM EDT | Tornado Warning | CHS | 23 min |
| Aug 30, 5:41 PM EDT | Areal Flood Advisory | CHS | 45 min |
| Aug 30, 6:26 PM EDT | Flash Flood Warning | CHS | 4 hr |
| Aug 30, 6:57 PM EDT | Areal Flood Advisory | CHS | 5 hr |
| Aug 30, 9:50 PM EDT | River Flood Warning | CHS | 11 days |
| Aug 30, 10:00 PM EDT | Areal Flood Warning | CHS | 6 hr |
| Sep 11, 4:06 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| Sep 11, 5:38 PM EDT | Special Weather Statement | CHS | 52 min |
| Sep 11, 6:13 PM EDT | Special Weather Statement | CHS | 47 min |
| Sep 11, 6:33 PM EDT | Areal Flood Advisory | CHS | 72 min |
| Sep 11, 6:38 PM EDT | Severe Thunderstorm Warning | CHS | 67 min |
| Sep 13, 6:35 PM EDT | Special Weather Statement | CHS | 40 min |
| Sep 17, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 4:35 PM EDT | Special Weather Statement | CHS | 40 min |
| Sep 17, 4:46 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Oct 20, 1:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 20, 4:42 PM EDT | Severe Thunderstorm Warning | CHS | 50 min |
| Oct 20, 5:20 PM EDT | Special Weather Statement | CHS | 40 min |
| Oct 31, 3:33 AM EDT | Freeze Watch | CHS | 23 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, 9:57 PM EST | Special Weather Statement | CHS | 48 min |
| 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 | CHS | 5 hr |
| Dec 24, 10:02 AM EST | River Flood Warning | CHS | 7 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 | 27 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 33 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 4 |
| River Flood Warning | 5 |
| Flood Watch | 2 |
| Areal Flood Advisory | 14 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 6 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.