Alert archive / South Carolina / Dillon County
Weather alerts in Dillon County, South Carolina, 2020
147 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Dillon County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 147
- Warnings
- 29
- Watches
- 17
- Advisories
- 39
- Busiest month
- May24 alerts
- Busiest day
- September 17, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 5 tornado warnings covering Dillon County in 2020 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 5 minutes after it went out.
Dillon County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 2 | 100% | 5 min |
| Severe thunderstorm warnings | 16 | 9 | 44% | 2 | 100% | 34 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, NC: tornado warnings | 43 | 16 | 63% | 41 | 73% | 10 min |
| NWS Wilmington, NC: severe thunderstorm warnings | 65 | 34 | 48% | 92 | 87% | 21 min |
| NWS Wilmington, NC: flash flood warnings | 10 | 8 | 20% | 30 | 83% | 82 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, 9:35 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Jan 11, 10:59 PM EST | Mesoscale Discussion | SPC | 91 min |
| Jan 11, 11:39 PM EST | Severe Thunderstorm Warning | ILM | 51 min |
| Jan 12, 12:28 AM EST | Severe Thunderstorm Warning | ILM | 47 min |
| Jan 12, 1:10 AM EST | Severe Thunderstorm Warning | ILM | 50 min |
| Jan 12, 10:52 PM EST | Dense Fog Advisory | ILM | 12 hr |
| Jan 13, 12:46 PM EST | Mesoscale Discussion | SPC | 119 min |
| Jan 13, 3:16 PM EST | Areal Flood Advisory | ILM | 52 min |
| Jan 16, 7:43 PM EST | River Flood Warning | ILM | 21 days |
| Feb 6, 4:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 6, 4:23 PM EST | Tornado Watch | SPC | 9 hr |
| Feb 6, 4:41 PM EST | Severe Thunderstorm Warning | ILM | 49 min |
| Feb 6, 5:26 PM EST | Severe Thunderstorm Warning | ILM | 34 min |
| Feb 6, 6:00 PM EST | Special Weather Statement | ILM | 60 min |
| Feb 6, 8:31 PM EST | Wind Advisory | ILM | 22 hr |
| Feb 6, 9:27 PM EST | River Flood Warning | ILM | 22 days |
| Feb 13, 10:29 AM EST | Mesoscale Discussion | SPC | 61 min |
| Feb 13, 12:30 PM EST | Special Weather Statement | ILM | 60 min |
| Feb 13, 1:30 PM EST | Special Weather Statement | ILM | 60 min |
| Feb 20, 3:31 AM EST | Winter Weather Advisory | ILM | 30 hr |
| Feb 26, 3:36 AM EST | Dense Fog Advisory | ILM | 6 hr |
| Mar 3, 4:23 PM EST | Special Weather Statement | ILM | 67 min |
| Mar 3, 4:41 PM EST | Severe Thunderstorm Warning | ILM | 34 min |
| Mar 6, 2:31 PM EST | Freeze Watch | ILM | 24 hr |
| Mar 7, 2:55 PM EST | Freeze Warning | ILM | 17 hr |
| Mar 9, 9:33 AM EDT | River Flood Warning | ILM | 70 hr |
| Mar 18, 12:16 AM EDT | Dense Fog Advisory | ILM | 10 hr |
| Apr 6, 4:10 PM EDT | Special Weather Statement | ILM | 35 min |
| Apr 10, 5:27 PM EDT | Frost Advisory | ILM | 15 hr |
| Apr 12, 2:52 PM EDT | Wind Advisory | ILM | 25 hr |
| Apr 13, 4:40 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 13, 5:01 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 13, 6:58 AM EDT | Severe Thunderstorm Warning | ILM | 47 min |
| Apr 13, 7:04 AM EDT | Severe Thunderstorm Warning | ILM | 41 min |
| Apr 13, 7:45 AM EDT | Severe Thunderstorm Warning | ILM | 30 min |
| Apr 15, 3:13 PM EDT | Frost Advisory | ILM | 17 hr |
| Apr 16, 3:21 PM EDT | Frost Advisory | ILM | 17 hr |
| Apr 30, 4:16 AM EDT | Special Weather Statement | ILM | 44 min |
| Apr 30, 4:31 AM EDT | Severe Thunderstorm Warning | ILM | 29 min |
| Apr 30, 5:26 AM EDT | Special Weather Statement | ILM | 64 min |
| Apr 30, 6:05 AM EDT | Special Weather Statement | ILM | 25 min |
| May 5, 3:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 5, 7:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 5, 8:18 PM EDT | Severe Thunderstorm Warning | ILM | 57 min |
| May 5, 8:32 PM EDT | Severe Thunderstorm Warning | ILM | 58 min |
| May 6, 6:58 PM EDT | Special Weather Statement | ILM | 47 min |
| May 6, 7:51 PM EDT | Special Weather Statement | ILM | 54 min |
| May 9, 4:19 PM EDT | Frost Advisory | ILM | 16 hr |
| May 19, 1:04 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 19, 3:16 PM EDT | Flash Flood Watch | ILM | 61 hr |
| May 21, 12:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 12:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 22, 3:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 22, 4:14 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 5:36 PM EDT | Severe Thunderstorm Warning | ILM | 54 min |
| May 22, 6:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 27, 8:53 AM EDT | Flash Flood Watch | ILM | 21 hr |
| May 27, 11:42 AM EDT | Areal Flood Advisory | ILM | 3 hr |
| May 27, 1:38 PM EDT | Areal Flood Advisory | ILM | 4 hr |
| May 27, 3:14 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| May 28, 3:45 PM EDT | Special Weather Statement | ILM | 60 min |
| May 29, 8:21 AM EDT | Flash Flood Watch | ILM | 16 hr |
| May 29, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 29, 2:09 PM EDT | Severe Thunderstorm Warning | ILM | 36 min |
| May 29, 3:17 PM EDT | Areal Flood Advisory | ILM | 91 min |
| Jun 11, 12:14 PM EDT | Flash Flood Watch | ILM | 10 hr |
| Jun 11, 2:43 PM EDT | Special Weather Statement | ILM | 62 min |
| Jun 15, 5:53 AM EDT | Special Weather Statement | ILM | 52 min |
| Jun 15, 6:27 AM EDT | Areal Flood Advisory | ILM | 3 hr |
| Jun 24, 6:39 PM EDT | Areal Flood Advisory | ILM | 111 min |
| Jun 28, 5:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 28, 6:49 PM EDT | Special Weather Statement | ILM | 56 min |
| Jun 28, 7:08 PM EDT | Severe Thunderstorm Warning | ILM | 67 min |
| Jun 28, 8:04 PM EDT | Special Weather Statement | ILM | 56 min |
| Jun 28, 8:06 PM EDT | Severe Thunderstorm Warning | ILM | 39 min |
| Jul 7, 3:54 PM EDT | Special Weather Statement | ILM | 66 min |
| Jul 13, 1:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 15, 6:52 PM EDT | Special Weather Statement | ILM | 23 min |
| Jul 15, 7:21 PM EDT | Special Weather Statement | ILM | 24 min |
| Jul 15, 7:23 PM EDT | Special Weather Statement | ILM | 22 min |
| Jul 19, 3:26 AM EDT | Heat Advisory | ILM | 17 hr |
| Jul 20, 3:53 AM EDT | Heat Advisory | ILM | 16 hr |
| Jul 20, 8:35 PM EDT | Heat Advisory | ILM | 23 hr |
| Jul 24, 4:49 PM EDT | Special Weather Statement | ILM | 26 min |
| Jul 24, 5:29 PM EDT | Areal Flood Advisory | ILM | 95 min |
| Jul 25, 6:11 PM EDT | Special Weather Statement | ILM | 34 min |
| Jul 28, 3:48 AM EDT | Heat Advisory | ILM | 15 hr |
| Jul 29, 5:21 PM EDT | Special Weather Statement | ILM | 54 min |
| Jul 31, 4:48 AM EDT | Heat Advisory | ILM | 14 hr |
| Aug 1, 3:22 AM EDT | Heat Advisory | ILM | 12 hr |
| Aug 1, 1:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 3:49 PM EDT | Special Weather Statement | ILM | 26 min |
| Aug 2, 3:10 AM EDT | Flash Flood Watch | ILM | 48 hr |
| Aug 2, 5:12 AM EDT | Tropical Storm Watch | ILM | 6 hr |
| Aug 2, 11:13 AM EDT | Tropical Storm Warning | ILM | 42 hr |
| Aug 7, 5:49 PM EDT | Special Weather Statement | ILM | 56 min |
| Aug 10, 7:18 PM EDT | Areal Flood Advisory | ILM | 57 min |
| Aug 10, 7:28 PM EDT | Special Weather Statement | ILM | 32 min |
| Aug 31, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 31, 8:59 PM EDT | Areal Flood Advisory | ILM | 106 min |
| Sep 2, 3:15 AM EDT | Heat Advisory | ILM | 16 hr |
| Sep 3, 3:42 AM EDT | Heat Advisory | ILM | 15 hr |
| Sep 16, 9:29 AM EDT | Flash Flood Watch | ILM | 41 hr |
| Sep 17, 10:20 AM EDT | Tornado Watch | SPC | 8 hr |
| Sep 17, 10:27 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 17, 2:54 PM EDT | Flash Flood Warning | ILM | 3 hr |
| Sep 17, 3:44 PM EDT | Tornado Warning | ILM | 9 min |
| Sep 17, 4:00 PM EDT | Tornado Warning | ILM | 13 min |
| Sep 17, 4:14 PM EDT | Areal Flood Advisory | ILM | 109 min |
| Sep 25, 3:45 PM EDT | Areal Flood Advisory | ILM | 2 hr |
| Sep 25, 5:21 PM EDT | Special Weather Statement | ILM | 54 min |
| Sep 25, 5:30 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| Sep 25, 6:14 PM EDT | Tornado Warning | ILM | 31 min |
| Sep 25, 6:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 25, 8:28 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| Sep 25, 9:08 PM EDT | Tornado Warning | ILM | 37 min |
| Sep 25, 9:49 PM EDT | Special Weather Statement | ILM | 41 min |
| Sep 25, 10:20 PM EDT | Special Weather Statement | ILM | 40 min |
| Sep 29, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 29, 6:14 PM EDT | Special Weather Statement | ILM | 61 min |
| Sep 29, 7:14 PM EDT | Special Weather Statement | ILM | 61 min |
| Oct 11, 1:31 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 11, 2:43 PM EDT | Special Weather Statement | ILM | 47 min |
| Oct 11, 3:15 PM EDT | Tornado Warning | ILM | 30 min |
| Oct 11, 3:46 PM EDT | Special Weather Statement | ILM | 44 min |
| Oct 11, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 28, 3:10 PM EDT | Wind Advisory | ILM | 27 hr |
| Nov 2, 2:10 PM EST | Frost Advisory | ILM | 18 hr |
| Nov 11, 3:20 AM EST | Flash Flood Watch | ILM | 36 hr |
| Nov 11, 4:23 PM EST | Areal Flood Advisory | ILM | 98 min |
| Nov 11, 6:29 PM EST | Areal Flood Advisory | ILM | 2 hr |
| Nov 12, 10:41 AM EST | Areal Flood Advisory | ILM | 3 hr |
| Nov 12, 11:28 AM EST | River Flood Warning | ILM | 21 days |
| Nov 12, 11:36 AM EST | Mesoscale Discussion | SPC | 114 min |
| Nov 12, 11:40 AM EST | Areal Flood Advisory | ILM | 5 hr |
| Nov 12, 4:16 PM EST | Areal Flood Advisory | ILM | 3 hr |
| Nov 17, 2:50 PM EST | Freeze Watch | ILM | 12 hr |
| Nov 18, 2:53 AM EST | Freeze Warning | ILM | 29 hr |
| Nov 27, 5:19 AM EST | Special Weather Statement | ILM | 41 min |
| Dec 4, 10:40 PM EST | Special Weather Statement | ILM | 50 min |
| Dec 14, 9:55 AM EST | Special Weather Statement | ILM | 65 min |
| Dec 24, 12:16 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 24, 2:19 PM EST | Tornado Watch | SPC | 9 hr |
| Dec 24, 7:13 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 24, 7:56 PM EST | Special Weather Statement | ILM | 49 min |
| Dec 31, 3:26 PM EST | Mesoscale Discussion | SPC | 2 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 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 36 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 4 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 19 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Frost Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| 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 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.