Alert archive / South Carolina
Weather alerts in South Carolina, 2025
2,482 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 2,482
- Warnings
- 498
- Watches
- 49
- Advisories
- 540
- Busiest month
- July512 alerts
- Busiest day
- June 8, 202557 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
6 of 22 tornado warnings covering South Carolina in 2025 had a tornado report inside them; 5 of 8 tornado reports fell inside a warning, on average 11 minutes after it went out.
South Carolina, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 22 | 6 | 73% | 8 | 63% | 11 min |
| Severe thunderstorm warnings | 349 | 245 | 30% | 733 | 87% | 25 min |
| Flash flood warnings | 54 | 37 | 31% | 134 | 90% | 67 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 7 | 1 | 86% | 1 | 100% | 1 min |
| NWS Charleston, SC: severe thunderstorm warnings | 107 | 50 | 53% | 243 | 65% | 27 min |
| NWS Charleston, SC: flash flood warnings | 31 | 19 | 39% | 111 | 86% | 56 min |
| NWS Greenville-Spartanburg, SC: tornado warnings | 7 | 4 | 43% | 5 | 80% | 11 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 259 | 173 | 33% | 549 | 83% | 22 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 13 | 11 | 15% | 42 | 86% | 75 min |
| NWS Columbia, SC: tornado warnings | 13 | 3 | 77% | 6 | 67% | 10 min |
| NWS Columbia, SC: severe thunderstorm warnings | 116 | 94 | 19% | 284 | 94% | 26 min |
| NWS Columbia, SC: flash flood warnings | 18 | 14 | 22% | 41 | 98% | 51 min |
| NWS Wilmington, NC: tornado warnings | 4 | 3 | 25% | 3 | 67% | 10 min |
| NWS Wilmington, NC: severe thunderstorm warnings | 77 | 46 | 40% | 120 | 88% | 30 min |
| NWS Wilmington, NC: flash flood warnings | 12 | 9 | 25% | 16 | 88% | 66 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
2,482 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Horry County265
- Georgetown County233
- Lexington County217
- Richland County209
- Berkeley County190
- Aiken County175
- Orangeburg County174
- Calhoun County157
- Edgefield County150
- Sumter County148
- Colleton County145
- Clarendon County144
- Newberry County144
- Barnwell County143
- Kershaw County143
- McCormick County143
- Lancaster County142
- Saluda County140
- Fairfield County139
- Williamsburg County139
- Greenville County138
- Spartanburg County136
- Dorchester County135
- Chesterfield County128
- Lee County128
- Anderson County128
- Oconee County128
- Bamberg County127
- Marion County127
- Charleston County127
- Florence County122
- York County122
- Dillon County121
- Laurens County120
- Pickens County119
- Darlington County117
- Hampton County117
- Jasper County115
- Abbeville County113
- Union County112
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.