Flash Flood Warnings in South Carolina, 2014

By month

41 of 61 flash flood warnings covering South Carolina in 2014 had a flash flood report inside them; 100 of 115 flash flood reports fell inside a warning, on average 69 minutes after it went out.

South Carolina, 2014

Each office's whole area, 2014

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.

• Berkeley County13
• Charleston County13
• Richland County11
• Greenville County8
• Anderson County7
• Dorchester County6
• York County5
• Pickens County4
• Spartanburg County4
• Beaufort County4
• Jasper County4
• Laurens County3
• Oconee County3
• Colleton County3
• Lancaster County3
• Abbeville County2
• Orangeburg County2
• Chester County2
• Aiken County1
• Edgefield County1
• Greenwood County1
• Newberry County1
• Saluda County1
• Cherokee County1
• Chesterfield County1

1. August 10, 201411flash flood warnings
2. September 19, 20144flash flood warnings
3. January 11, 20143flash flood warnings
4. April 19, 20143flash flood warnings
5. July 21, 20143flash flood warnings
6. July 31, 20143flash flood warnings
7. September 13, 20143flash flood warnings
8. September 14, 20143flash flood warnings
9. May 15, 20142flash flood warnings
10. June 23, 20142flash flood warnings
11. July 22, 20142flash flood warnings
12. January 10, 20141flash flood warnings

Alerts in force nowTornadoes on recordThe radar archive20132015

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.