Alert archive / South Carolina / Berkeley County
Weather alerts in Berkeley County, South Carolina, 2018
175 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 175
- Warnings
- 31
- Watches
- 17
- Advisories
- 73
- 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.
Berkeley County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 10 | 23% | 11 | 82% | 25 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 |
| Feb 7, 12:13 PM EST | Wind Advisory | CHS | 5 hr |
| Feb 10, 12:24 AM EST | Dense Fog Advisory | CHS | 10 hr |
| Feb 10, 10:50 PM EST | River Flood Warning | CHS | 12 days |
| Feb 12, 10:00 PM EST | Lake Wind Advisory | CHS | 5 hr |
| Feb 19, 8:33 PM EST | Dense Fog Advisory | CHS | 13 hr |
| Feb 21, 5:45 AM EST | Dense Fog Advisory | CHS | 4 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 |
| Feb 28, 3:28 PM EST | Lake Wind Advisory | CHS | 29 hr |
| Mar 2, 3:30 AM EST | Lake Wind Advisory | CHS | 16 hr |
| Mar 3, 10:22 AM EST | Lake Wind Advisory | CHS | 8 hr |
| Mar 4, 3:15 PM EST | Frost Advisory | CHS | 18 hr |
| Mar 4, 5:58 PM EST | Freeze Warning | CHS | 15 hr |
| Mar 6, 3:47 PM EST | Lake Wind Advisory | CHS | 27 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, 1:51 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 20, 3:42 AM EDT | Lake Wind Advisory | CHS | 45 hr |
| Mar 20, 4:54 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Mar 20, 5:11 AM EDT | Severe Thunderstorm Warning | CHS | 35 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 | Mesoscale Discussion | SPC | 87 min |
| Mar 20, 3:06 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| Mar 20, 3:49 PM EDT | Special Weather Statement | CHS | 26 min |
| Mar 20, 5:45 PM EDT | Severe Thunderstorm Warning | CHS | 43 min |
| Mar 20, 6:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Mar 22, 9:50 AM EDT | Freeze Watch | CHS | 5 hr |
| Mar 22, 2:56 PM EDT | Freeze Warning | CHS | 18 hr |
| Apr 7, 3:36 PM EDT | Lake Wind Advisory | CHS | 16 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, 3:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 15, 3:23 PM EDT | Special Weather Statement | CHS | 52 min |
| Apr 15, 4:32 PM EDT | Special Weather Statement | CHS | 28 min |
| Apr 15, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 15, 6:39 PM EDT | Lake Wind Advisory | CHS | 23 hr |
| Apr 15, 6:45 PM EDT | Special Weather Statement | CHS | 45 min |
| Apr 15, 7:28 PM EDT | Special Weather Statement | CHS | 47 min |
| Apr 19, 9:10 PM EDT | Lake Wind Advisory | CHS | 13 hr |
| Apr 23, 3:10 AM EDT | Lake Wind Advisory | CHS | 16 hr |
| Apr 23, 4:30 PM EDT | Areal Flood Advisory | CHS | 6 hr |
| Apr 24, 12:08 AM EDT | Special Weather Statement | CHS | 37 min |
| Apr 24, 12:43 AM EDT | Special Weather Statement | CHS | 32 min |
| Apr 24, 2:06 AM EDT | Special Weather Statement | CHS | 24 min |
| Apr 25, 8:32 AM EDT | River Flood Warning | CHS | 14 days |
| May 19, 11:59 AM EDT | Areal Flood Advisory | CHS | 91 min |
| May 23, 4:02 PM EDT | Special Weather Statement | CHS | 28 min |
| May 24, 8:39 PM EDT | River Flood Warning | CHS | 24 days |
| May 30, 3:12 PM EDT | Areal Flood Advisory | CHS | 63 min |
| May 31, 5:42 PM EDT | Areal Flood Advisory | CHS | 63 min |
| Jun 2, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 6:36 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| Jun 2, 7:19 PM EDT | Special Weather Statement | CHS | 26 min |
| Jun 12, 12:25 AM EDT | Areal Flood Advisory | CHS | 65 min |
| Jun 12, 1:56 PM EDT | Areal Flood Advisory | CHS | 46 min |
| Jun 14, 4:20 PM EDT | Special Weather Statement | CHS | 40 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, 10:37 PM EDT | Special Weather Statement | CHS | 23 min |
| Jun 15, 11:02 PM EDT | Special Weather Statement | CHS | 43 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, 7:18 PM EDT | Special Weather Statement | CHS | 42 min |
| Jun 20, 7:29 PM EDT | Severe Thunderstorm Warning | CHS | 42 min |
| Jun 21, 3:16 AM EDT | Heat Advisory | CHS | 15 hr |
| 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, 9:38 PM EDT | Severe Thunderstorm Warning | CHS | 52 min |
| Jun 24, 10:37 PM EDT | Special Weather Statement | CHS | 38 min |
| Jun 25, 3:34 AM EDT | Heat Advisory | CHS | 13 hr |
| Jun 25, 4:38 PM EDT | Severe Thunderstorm Warning | CHS | 51 min |
| Jun 26, 6:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 26, 10:34 PM EDT | Special Weather Statement | CHS | 26 min |
| Jun 27, 9:26 PM EDT | Special Weather Statement | CHS | 49 min |
| Jun 27, 10:17 PM EDT | Special Weather Statement | CHS | 43 min |
| Jun 27, 10:47 PM EDT | Special Weather Statement | CHS | 43 min |
| Jul 7, 2:31 PM EDT | Areal Flood Advisory | CHS | 59 min |
| Jul 7, 2:53 PM EDT | Areal Flood Advisory | CHS | 97 min |
| Jul 12, 6:49 PM EDT | Severe Thunderstorm Warning | CHS | 56 min |
| Jul 16, 11:19 PM EDT | Special Weather Statement | CHS | 41 min |
| Jul 18, 5:27 PM EDT | Areal Flood Advisory | CHS | 45 min |
| Jul 20, 3:28 AM EDT | Flash Flood Watch | CHS | 15 hr |
| Jul 20, 6:23 AM EDT | Areal Flood Advisory | CHS | 82 min |
| Jul 22, 2:29 AM EDT | Special Weather Statement | CHS | 46 min |
| Jul 22, 2:46 AM EDT | Severe Thunderstorm Warning | CHS | 59 min |
| Jul 22, 3:35 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 3:44 AM EDT | Special Weather Statement | CHS | 31 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 23, 11:29 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Jul 24, 1:44 PM EDT | Special Weather Statement | CHS | 46 min |
| Jul 24, 6:01 PM EDT | Areal Flood Advisory | CHS | 89 min |
| Jul 25, 6:38 PM EDT | Special Weather Statement | CHS | 52 min |
| Jul 26, 1:50 PM EDT | Special Weather Statement | CHS | 25 min |
| Jul 26, 1:57 PM EDT | Areal Flood Advisory | CHS | 93 min |
| Jul 26, 2:14 PM EDT | Special Weather Statement | CHS | 46 min |
| Jul 26, 3:02 PM EDT | Special Weather Statement | CHS | 43 min |
| Jul 26, 3:12 PM EDT | Areal Flood Advisory | CHS | 93 min |
| Jul 26, 3:45 PM EDT | Special Weather Statement | CHS | 30 min |
| Jul 26, 4:29 PM EDT | Areal Flood Advisory | CHS | 56 min |
| Jul 30, 6:31 AM EDT | Areal Flood Advisory | CHS | 65 min |
| Aug 2, 10:13 PM EDT | Flash Flood Watch | CHS | 21 hr |
| Aug 5, 8:56 PM EDT | Special Weather Statement | CHS | 34 min |
| Aug 5, 9:36 PM EDT | Special Weather Statement | CHS | 24 min |
| Aug 6, 11:03 AM EDT | River Flood Warning | CHS | 26 hr |
| Aug 9, 6:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 7:50 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Aug 9, 8:20 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Aug 13, 6:35 PM EDT | Areal Flood Advisory | CHS | 55 min |
| Aug 13, 7:29 PM EDT | Areal Flood Advisory | CHS | 91 min |
| Aug 13, 8:05 PM EDT | Special Weather Statement | CHS | 40 min |
| Aug 13, 8:59 PM EDT | Areal Flood Advisory | CHS | 27 min |
| Aug 14, 3:14 PM EDT | Special Weather Statement | CHS | 46 min |
| Aug 14, 4:00 PM EDT | Special Weather Statement | CHS | 45 min |
| Aug 14, 4:19 PM EDT | Severe Thunderstorm Warning | CHS | 56 min |
| Aug 14, 5:15 PM EDT | Special Weather Statement | CHS | 30 min |
| Aug 14, 6:10 PM EDT | Areal Flood Advisory | CHS | 95 min |
| Aug 15, 7:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 18, 7:57 PM EDT | Special Weather Statement | CHS | 48 min |
| Sep 7, 2:47 PM EDT | Special Weather Statement | CHS | 43 min |
| Sep 11, 5:25 AM EDT | Hurricane Watch | CHS | 3 days |
| Sep 13, 11:00 AM EDT | Tropical Storm Warning | CHS | 52 hr |
| Sep 13, 5:27 PM EDT | Flash Flood Watch | CHS | 41 hr |
| Sep 14, 11:05 AM EDT | River Flood Warning | CHS | 7 days |
| Sep 15, 3:18 PM EDT | Lake Wind Advisory | CHS | 76 min |
| Sep 16, 4:45 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Sep 16, 8:38 PM EDT | Areal Flood Advisory | CHS | 82 min |
| Sep 29, 3:27 PM EDT | Special Weather Statement | CHS | 33 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, 12:08 PM EDT | Areal Flood Advisory | CHS | 82 min |
| Oct 10, 1:06 PM EDT | Areal Flood Advisory | CHS | 57 min |
| 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 |
| Oct 11, 4:34 AM EDT | Mesoscale Discussion | SPC | 56 min |
| Oct 11, 10:31 AM EDT | River Flood Warning | CHS | 11 days |
| Oct 11, 4:52 PM EDT | Lake Wind Advisory | CHS | 3 hr |
| Oct 20, 4:00 AM EDT | Wind Advisory | CHS | 3 hr |
| Oct 20, 7:18 AM EDT | Lake Wind Advisory | CHS | 31 hr |
| Oct 31, 10:04 PM EDT | River Flood Warning | CHS | 9 days |
| Nov 2, 9:51 PM EDT | Lake Wind Advisory | CHS | 6 hr |
| Nov 13, 10:28 AM EST | River Flood Warning | CHS | 139 days |
| Nov 16, 2:46 PM EST | Frost Advisory | CHS | 17 hr |
| Nov 26, 3:40 AM EST | Freeze Watch | CHS | 24 hr |
| Nov 26, 3:40 AM EST | Lake Wind Advisory | CHS | 19 hr |
| Nov 27, 3:21 AM EST | Freeze Warning | CHS | 30 hr |
| Nov 27, 2:30 PM EST | Lake Wind Advisory | CHS | 13 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 8, 3:42 PM EST | Lake Wind Advisory | CHS | 27 hr |
| Dec 14, 3:23 AM EST | Flash Flood Watch | CHS | 27 hr |
| Dec 14, 9:18 AM EST | Areal Flood Advisory | CHS | 117 min |
| Dec 19, 9:35 PM EST | Flash Flood Watch | CHS | 19 hr |
| Dec 20, 3:24 PM EST | Lake Wind Advisory | CHS | 18 hr |
| Dec 20, 3:24 PM EST | Wind Advisory | CHS | 27 hr |
| Dec 20, 3:36 PM EST | Special Weather Statement | CHS | 24 min |
| Dec 21, 5:52 PM EST | Lake Wind Advisory | CHS | 7 hr |
| 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 | 13 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 39 |
| Flooding | |
| River Flood Warning | 8 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 28 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Lake Wind Advisory | 19 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Hurricane Watch | 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.