Alert archive / South Carolina / Colleton County
Weather alerts in Colleton County, South Carolina, 2018
132 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 132
- Warnings
- 28
- Watches
- 13
- Advisories
- 41
- Busiest month
- June28 alerts
- Busiest day
- March 20, 201811 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Colleton County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 12 | 25% | 40 | 68% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 4 | 0 | 100% | 5 | 0% | |
| NWS Charleston, SC: severe thunderstorm warnings | 70 | 42 | 40% | 174 | 64% | 20 min |
| NWS Charleston, SC: flash flood warnings | 2 | 1 | 50% | 1 | 100% | 39 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, 4:02 AM EST | Wind Chill Advisory | CHS | 30 hr |
| Jan 2, 3:33 AM EST | Winter Storm Watch | CHS | 13 hr |
| Jan 2, 4:05 PM EST | Winter Storm Warning | CHS | 27 hr |
| Jan 3, 7:09 PM EST | Winter Weather Advisory | CHS | 40 hr |
| Jan 5, 3:32 PM EST | Wind Chill Advisory | CHS | 19 hr |
| Jan 5, 3:32 PM EST | Winter Weather Advisory | CHS | 19 hr |
| Jan 6, 3:27 PM EST | Wind Chill Advisory | CHS | 19 hr |
| Jan 23, 3:18 AM EST | Special Weather Statement | CHS | 27 min |
| Feb 7, 12:13 PM EST | Wind Advisory | CHS | 5 hr |
| Feb 10, 12:24 AM EST | Dense Fog Advisory | CHS | 10 hr |
| Feb 19, 8:33 PM EST | Dense Fog Advisory | CHS | 13 hr |
| Feb 22, 5:08 AM EST | Dense Fog Advisory | CHS | 4 hr |
| Feb 24, 5:29 AM EST | Dense Fog Advisory | CHS | 4 hr |
| Mar 4, 3:15 PM EST | Frost Advisory | CHS | 18 hr |
| Mar 4, 5:58 PM EST | Freeze Warning | CHS | 15 hr |
| Mar 7, 9:20 PM EST | Frost Advisory | CHS | 12 hr |
| Mar 8, 3:26 AM EST | Freeze Warning | CHS | 29 hr |
| Mar 13, 7:55 PM EDT | Freeze Warning | CHS | 13 hr |
| Mar 14, 3:12 AM EDT | Freeze Watch | CHS | 9 hr |
| Mar 14, 12:33 PM EDT | Freeze Warning | CHS | 20 hr |
| Mar 14, 3:22 PM EDT | Fire Weather Watch | CHS | 12 hr |
| Mar 15, 3:08 AM EDT | Red Flag Warning | CHS | 16 hr |
| Mar 20, 12:32 AM EDT | Mesoscale Discussion | SPC | 88 min |
| Mar 20, 1:51 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 20, 3:42 AM EDT | Severe Thunderstorm Warning | CHS | 63 min |
| Mar 20, 4:26 AM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Mar 20, 4:54 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Mar 20, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Mar 20, 12:43 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 20, 2:48 PM EDT | Special Weather Statement | CHS | 27 min |
| Mar 20, 2:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Mar 20, 2:52 PM EDT | Severe Thunderstorm Warning | CHS | 53 min |
| Mar 20, 3:18 PM EDT | Severe Thunderstorm Warning | CHS | 57 min |
| Mar 22, 9:50 AM EDT | Freeze Watch | CHS | 5 hr |
| Mar 22, 2:56 PM EDT | Freeze Warning | CHS | 18 hr |
| Apr 15, 3:21 AM EDT | Wind Advisory | CHS | 15 hr |
| Apr 15, 12:13 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 15, 2:23 PM EDT | Special Weather Statement | CHS | 52 min |
| Apr 15, 3:23 PM EDT | Special Weather Statement | CHS | 52 min |
| Apr 15, 5:25 PM EDT | Special Weather Statement | CHS | 35 min |
| Apr 15, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 15, 5:55 PM EDT | Special Weather Statement | CHS | 50 min |
| Apr 23, 3:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 17, 3:49 PM EDT | Special Weather Statement | CHS | 41 min |
| May 24, 3:05 PM EDT | Areal Flood Advisory | CHS | 85 min |
| Jun 2, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 5:46 PM EDT | Special Weather Statement | CHS | 14 min |
| Jun 10, 6:30 PM EDT | Special Weather Statement | CHS | 15 min |
| Jun 11, 6:19 PM EDT | Special Weather Statement | CHS | 11 min |
| Jun 11, 6:30 PM EDT | Special Weather Statement | CHS | 30 min |
| Jun 14, 4:29 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Jun 15, 2:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 8:09 PM EDT | Severe Thunderstorm Warning | CHS | 66 min |
| Jun 15, 9:31 PM EDT | Special Weather Statement | CHS | 29 min |
| Jun 19, 3:28 AM EDT | Heat Advisory | CHS | 15 hr |
| Jun 20, 3:18 AM EDT | Heat Advisory | CHS | 15 hr |
| Jun 20, 5:33 PM EDT | Special Weather Statement | CHS | 42 min |
| Jun 20, 6:10 PM EDT | Special Weather Statement | CHS | 50 min |
| Jun 20, 6:15 PM EDT | Severe Thunderstorm Warning | CHS | 60 min |
| Jun 22, 3:25 AM EDT | Heat Advisory | CHS | 15 hr |
| Jun 23, 3:26 AM EDT | Heat Advisory | CHS | 16 hr |
| Jun 23, 2:12 PM EDT | Heat Advisory | CHS | 30 hr |
| Jun 23, 3:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 24, 11:08 PM EDT | Severe Thunderstorm Warning | CHS | 52 min |
| Jun 24, 11:58 PM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Jun 25, 12:58 AM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Jun 25, 3:34 AM EDT | Heat Advisory | CHS | 13 hr |
| Jun 25, 3:18 PM EDT | Special Weather Statement | CHS | 27 min |
| Jun 25, 5:15 PM EDT | Severe Thunderstorm Warning | CHS | 31 min |
| Jun 25, 5:57 PM EDT | Special Weather Statement | CHS | 33 min |
| Jun 25, 8:52 PM EDT | Severe Thunderstorm Warning | CHS | 53 min |
| Jun 26, 6:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 27, 11:55 PM EDT | Areal Flood Advisory | CHS | 65 min |
| Jul 7, 3:47 PM EDT | Special Weather Statement | CHS | 43 min |
| Jul 12, 1:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 16, 10:17 PM EDT | Special Weather Statement | CHS | 28 min |
| Jul 20, 8:09 AM EDT | Areal Flood Advisory | CHS | 81 min |
| Jul 20, 4:45 PM EDT | Areal Flood Advisory | CHS | 90 min |
| Jul 23, 1:24 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 9:55 PM EDT | Areal Flood Advisory | CHS | 110 min |
| Jul 26, 3:22 PM EDT | Special Weather Statement | CHS | 38 min |
| Jul 26, 3:29 PM EDT | Special Weather Statement | CHS | 46 min |
| Jul 26, 3:53 PM EDT | Areal Flood Advisory | CHS | 97 min |
| Jul 26, 5:07 PM EDT | Areal Flood Advisory | CHS | 65 min |
| Aug 2, 7:42 PM EDT | Special Weather Statement | CHS | 48 min |
| Aug 2, 10:13 PM EDT | Flash Flood Watch | CHS | 21 hr |
| Aug 3, 4:48 PM EDT | Areal Flood Advisory | CHS | 87 min |
| Aug 3, 5:22 PM EDT | Areal Flood Advisory | CHS | 83 min |
| Aug 3, 6:17 PM EDT | Areal Flood Advisory | CHS | 58 min |
| Aug 3, 6:57 PM EDT | Areal Flood Advisory | CHS | 33 min |
| Aug 3, 8:31 PM EDT | River Flood Warning | CHS | 5 days |
| Aug 6, 4:47 PM EDT | Special Weather Statement | CHS | 28 min |
| Aug 6, 5:22 PM EDT | Special Weather Statement | CHS | 23 min |
| Aug 8, 8:05 PM EDT | Special Weather Statement | CHS | 25 min |
| Aug 9, 6:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 6:42 PM EDT | Severe Thunderstorm Warning | CHS | 63 min |
| Aug 9, 7:13 PM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Aug 12, 3:37 PM EDT | Areal Flood Advisory | CHS | 63 min |
| Aug 13, 4:49 PM EDT | Special Weather Statement | CHS | 41 min |
| Aug 14, 5:09 PM EDT | Severe Thunderstorm Warning | CHS | 66 min |
| Aug 14, 6:10 PM EDT | Areal Flood Advisory | CHS | 95 min |
| Aug 14, 6:18 PM EDT | Special Weather Statement | CHS | 42 min |
| Aug 14, 6:32 PM EDT | Special Weather Statement | CHS | 43 min |
| Aug 14, 6:56 PM EDT | Special Weather Statement | CHS | 49 min |
| Aug 14, 7:27 PM EDT | Special Weather Statement | CHS | 48 min |
| Aug 14, 7:43 PM EDT | Areal Flood Advisory | CHS | 92 min |
| Aug 14, 7:44 PM EDT | Special Weather Statement | CHS | 31 min |
| Aug 17, 8:00 PM EDT | Special Weather Statement | CHS | 30 min |
| Aug 18, 6:58 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 18, 7:24 PM EDT | Severe Thunderstorm Warning | CHS | 49 min |
| Aug 18, 7:35 PM EDT | Special Weather Statement | CHS | 40 min |
| Aug 18, 8:59 PM EDT | Special Weather Statement | CHS | 46 min |
| Sep 10, 6:13 PM EDT | Special Weather Statement | CHS | 47 min |
| Oct 7, 7:10 AM EDT | Dense Fog Advisory | CHS | 3 hr |
| Oct 9, 5:15 AM EDT | Tropical Storm Watch | CHS | 12 hr |
| Oct 9, 4:11 PM EDT | Tropical Storm Warning | CHS | 52 hr |
| Oct 10, 4:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 11:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Oct 10, 11:38 PM EDT | Tornado Watch | SPC | 7 hr |
| Nov 16, 2:46 PM EST | Frost Advisory | CHS | 17 hr |
| Nov 19, 3:03 AM EST | Dense Fog Advisory | CHS | 5 hr |
| Nov 26, 3:40 AM EST | Freeze Watch | CHS | 24 hr |
| Nov 27, 3:21 AM EST | Freeze Warning | CHS | 30 hr |
| Dec 2, 6:48 AM EST | Areal Flood Advisory | CHS | 3 hr |
| Dec 2, 7:37 AM EST | Areal Flood Advisory | CHS | 2 hr |
| Dec 2, 9:44 AM EST | Areal Flood Advisory | CHS | 2 hr |
| Dec 15, 9:55 AM EST | River Flood Warning | CHS | 12 days |
| Dec 19, 9:35 PM EST | Flash Flood Watch | CHS | 19 hr |
| Dec 20, 2:36 PM EST | Special Weather Statement | CHS | 24 min |
| Dec 20, 3:24 PM EST | Wind Advisory | CHS | 27 hr |
| Dec 29, 10:13 AM EST | River Flood Warning | CHS | 21 days |
| Dec 30, 2:54 PM EST | Dense Fog Advisory | CHS | 21 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 | 16 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 36 |
| Flooding | |
| River Flood Warning | 3 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 17 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| 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 nowTornadoes on recordForecastThe radar archive20172019
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.