Alert archive / South Carolina / Hampton County
Weather alerts in Hampton County, South Carolina, 2020
87 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hampton County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 87
- Warnings
- 26
- Watches
- 7
- Advisories
- 24
- Busiest month
- April14 alerts
- Busiest day
- April 13, 20206 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 4 tornado warnings covering Hampton County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 16 minutes after it went out.
Hampton County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 3 | 25% | 1 | 100% | 16 min |
| Severe thunderstorm warnings | 14 | 11 | 21% | 11 | 64% | 28 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 20 | 10 | 50% | 19 | 89% | 12 min |
| NWS Charleston, SC: severe thunderstorm warnings | 72 | 50 | 31% | 301 | 69% | 27 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 11, 11:42 PM EST | Special Weather Statement | CHS | 48 min |
| Jan 12, 9:51 AM EST | River Flood Warning | CHS | 93 days |
| Jan 12, 7:22 PM EST | Dense Fog Advisory | CHS | 15 hr |
| Jan 13, 9:20 PM EST | Dense Fog Advisory | CHS | 9 hr |
| Jan 24, 4:39 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 11:45 AM EST | Mesoscale Discussion | SPC | 90 min |
| Feb 6, 4:29 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 5:30 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 6, 7:32 PM EST | Mesoscale Discussion | SPC | 118 min |
| Feb 7, 3:48 AM EST | Wind Advisory | CHS | 11 hr |
| Feb 13, 1:09 PM EST | Special Weather Statement | CHS | 36 min |
| Feb 13, 1:43 PM EST | Special Weather Statement | CHS | 47 min |
| Feb 18, 9:41 PM EST | Dense Fog Advisory | CHS | 8 hr |
| Feb 29, 2:25 AM EST | Freeze Watch | CHS | 13 hr |
| Feb 29, 3:12 PM EST | Freeze Warning | CHS | 17 hr |
| Mar 4, 6:51 PM EST | Areal Flood Advisory | CHS | 114 min |
| Mar 4, 8:44 PM EST | Areal Flood Advisory | CHS | 2 hr |
| Mar 5, 4:56 PM EST | Areal Flood Advisory | CHS | 64 min |
| Mar 6, 3:10 PM EST | Freeze Watch | CHS | 24 hr |
| Mar 7, 3:08 PM EST | Freeze Warning | CHS | 17 hr |
| Mar 18, 5:44 AM EDT | Dense Fog Advisory | CHS | 4 hr |
| Mar 31, 2:22 PM EDT | Tornado Watch | SPC | 6 hr |
| Mar 31, 3:46 PM EDT | Severe Thunderstorm Warning | CHS | 59 min |
| Mar 31, 4:03 PM EDT | Severe Thunderstorm Warning | CHS | 42 min |
| Mar 31, 4:29 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Mar 31, 5:09 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Apr 13, 3:20 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 13, 5:33 AM EDT | Severe Thunderstorm Warning | CHS | 57 min |
| Apr 13, 5:54 AM EDT | Tornado Warning | CHS | 36 min |
| Apr 13, 6:18 AM EDT | Tornado Warning | CHS | 27 min |
| Apr 13, 6:22 AM EDT | Severe Thunderstorm Warning | CHS | 53 min |
| Apr 13, 6:38 AM EDT | Tornado Warning | CHS | 37 min |
| Apr 15, 5:38 AM EDT | Special Weather Statement | CHS | 37 min |
| Apr 18, 9:39 PM EDT | River Flood Warning | CHS | 25 days |
| Apr 19, 7:26 PM EDT | Flash Flood Watch | CHS | 11 hr |
| Apr 19, 8:09 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Apr 19, 9:41 PM EDT | Areal Flood Advisory | CHS | 94 min |
| Apr 20, 1:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 23, 2:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 23, 5:31 PM EDT | Areal Flood Advisory | CHS | 89 min |
| May 18, 3:18 PM EDT | Special Weather Statement | CHS | 12 min |
| May 18, 5:31 PM EDT | Special Weather Statement | CHS | 29 min |
| May 20, 10:12 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 6:44 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| May 22, 7:32 PM EDT | Severe Thunderstorm Warning | CHS | 58 min |
| May 22, 8:24 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| May 27, 10:53 AM EDT | River Flood Warning | CHS | 21 days |
| Jun 5, 5:49 PM EDT | Special Weather Statement | CHS | 41 min |
| Jun 8, 4:33 PM EDT | Areal Flood Advisory | CHS | 87 min |
| Jun 8, 5:57 PM EDT | Areal Flood Advisory | CHS | 93 min |
| Jun 9, 6:12 PM EDT | Special Weather Statement | CHS | 33 min |
| Jun 12, 3:28 AM EDT | Flash Flood Watch | CHS | 9 hr |
| Jun 18, 10:06 PM EDT | Special Weather Statement | CHS | 24 min |
| Jun 18, 10:31 PM EDT | Special Weather Statement | CHS | 29 min |
| Jun 18, 11:00 PM EDT | Special Weather Statement | CHS | 30 min |
| Jun 23, 6:06 PM EDT | Special Weather Statement | CHS | 24 min |
| Jun 23, 6:23 PM EDT | Special Weather Statement | CHS | 37 min |
| Jun 24, 6:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 24, 8:14 PM EDT | Special Weather Statement | CHS | 31 min |
| Jun 27, 8:19 PM EDT | Severe Thunderstorm Warning | CHS | 41 min |
| Jul 11, 12:49 AM EDT | Special Weather Statement | CHS | 26 min |
| Aug 1, 1:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 5:31 AM EDT | Wind Advisory | CHS | 11 hr |
| Aug 4, 6:13 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 5, 5:45 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Aug 10, 8:29 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Aug 12, 4:37 PM EDT | Severe Thunderstorm Warning | CHS | 53 min |
| Aug 12, 6:25 PM EDT | Areal Flood Advisory | CHS | 80 min |
| Aug 13, 6:55 PM EDT | Areal Flood Advisory | CHS | 65 min |
| Aug 13, 7:24 PM EDT | Special Weather Statement | CHS | 36 min |
| Aug 13, 8:00 PM EDT | Areal Flood Advisory | CHS | 90 min |
| Aug 14, 6:17 PM EDT | Severe Thunderstorm Warning | CHS | 43 min |
| Aug 18, 2:31 PM EDT | Severe Thunderstorm Warning | CHS | 59 min |
| Aug 25, 6:36 PM EDT | Special Weather Statement | CHS | 24 min |
| Sep 24, 8:54 PM EDT | River Flood Warning | CHS | 11 days |
| Sep 25, 6:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 26, 5:39 AM EDT | Dense Fog Advisory | CHS | 109 min |
| Sep 29, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 4:44 AM EDT | Dense Fog Advisory | CHS | 5 hr |
| Nov 2, 3:30 AM EST | Frost Advisory | CHS | 28 hr |
| Nov 10, 9:00 PM EST | River Flood Warning | CHS | 32 days |
| Nov 18, 3:32 PM EST | Frost Advisory | CHS | 16 hr |
| Nov 18, 10:00 PM EST | Freeze Warning | CHS | 9 hr |
| Nov 23, 12:52 AM EST | Dense Fog Advisory | CHS | 5 hr |
| Dec 10, 9:22 PM EST | Dense Fog Advisory | CHS | 12 hr |
| Dec 24, 6:06 PM EST | Special Weather Statement | CHS | 39 min |
| Dec 24, 6:25 PM EST | Tornado Warning | CHS | 35 min |
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 | 14 |
| Tornado Warning | 4 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 19 |
| Flooding | |
| River Flood Warning | 5 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 12 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.