Alert archive / South Carolina / Tornado Warnings
Tornado Warnings in South Carolina, 2013
27 tornado warnings in 2013. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Tornado Warnings
- 27
- Busiest month
- June14 tornado warnings
- Busiest day
- July 23, 20134 tornado warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
5 of 27 tornado warnings covering South Carolina in 2013 had a tornado report inside them; 8 of 10 tornado reports fell inside a warning, on average 11 minutes after it went out.
South Carolina, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 27 | 5 | 81% | 10 | 80% | 11 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 11 | 3 | 73% | 6 | 83% | 14 min |
| NWS Wilmington, NC: tornado warnings | 7 | 1 | 86% | 1 | 100% | 5 min |
| NWS Charleston, SC: tornado warnings | 15 | 1 | 93% | 3 | 67% | 10 min |
| NWS Columbia, SC: tornado warnings | 5 | 2 | 60% | 3 | 67% | 6 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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 30, 3:54 PM EST | Tornado Warning | GSP | Greenville, Oconee, Pickens | 36 min |
| Jan 30, 4:11 PM EST | Tornado Warning | GSP | Oconee, Pickens | 34 min |
| Jan 30, 5:28 PM EST | Tornado Warning | GSP | Greenville, Spartanburg | 32 min |
| Feb 26, 6:16 AM EST | Tornado Warning | CHS | Jasper | 44 min |
| Feb 26, 7:41 AM EST | Tornado Warning | CHS | Beaufort, Charleston, Colleton | 49 min |
| Apr 28, 7:47 PM EDT | Tornado Warning | CAE | Fairfield | 43 min |
| Jun 2, 4:04 PM EDT | Tornado Warning | GSP | Anderson | 41 min |
| Jun 3, 8:23 PM EDT | Tornado Warning | CHS | Berkeley | 52 min |
| Jun 4, 3:18 PM EDT | Tornado Warning | CAE | Orangeburg | 27 min |
| Jun 4, 3:30 PM EDT | Tornado Warning | CHS | Berkeley, Dorchester | 45 min |
| Jun 6, 9:22 PM EDT | Tornado Warning | CHS | Beaufort | 23 min |
| Jun 6, 10:17 PM EDT | Tornado Warning | CHS | Colleton | 43 min |
| Jun 9, 3:36 PM EDT | Tornado Warning | GSP | Greenwood, Laurens | 39 min |
| Jun 10, 1:25 PM EDT | Tornado Warning | GSP | Greenville, Laurens, Spartanburg | 50 min |
| Jun 26, 5:20 PM EDT | Tornado Warning | CHS | Charleston | 40 min |
| Jun 26, 6:03 PM EDT | Tornado Warning | CHS | Charleston, Dorchester | 42 min |
| Jun 29, 4:48 PM EDT | Tornado Warning | ILM | Horry | 27 min |
| Jun 29, 6:38 PM EDT | Tornado Warning | ILM | Horry | 37 min |
| Jun 30, 4:30 PM EDT | Tornado Warning | CHS | Berkeley, Dorchester | 45 min |
| Jun 30, 5:55 PM EDT | Tornado Warning | CHS | Berkeley | 50 min |
| Jul 13, 9:13 AM EDT | Tornado Warning | CHS | Beaufort | 47 min |
| Jul 22, 8:29 PM EDT | Tornado Warning | GSP | Oconee | 46 min |
| Jul 22, 9:04 PM EDT | Tornado Warning | GSP | Anderson, Oconee, Pickens | 41 min |
| Jul 22, 9:07 PM EDT | Tornado Warning | GSP | Anderson, Oconee | 38 min |
| Jul 22, 9:24 PM EDT | Tornado Warning | GSP | Abbeville, Anderson, Greenwood | 51 min |
| Dec 14, 7:09 PM EST | Tornado Warning | CHS | Colleton, Dorchester | 36 min |
| Dec 14, 7:22 PM EST | Tornado Warning | CAE | Orangeburg | 23 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.