Flash Flood Warnings in South Carolina, 2008

By month

16 of 27 flash flood warnings covering South Carolina in 2008 had a flash flood report inside them; 43 of 51 flash flood reports fell inside a warning, on average 81 minutes after it went out.

South Carolina, 2008

Each office's whole area, 2008

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.

• Charleston County11
• Berkeley County7
• Richland County6
• Dorchester County4
• Lancaster County4
• Colleton County3
• Kershaw County3
• Fairfield County3
• Beaufort County2
• Oconee County2
• Lexington County2
• York County1
• Calhoun County1
• Newberry County1
• Chesterfield County1

1. August 26, 20087flash flood warnings
2. August 25, 20082flash flood warnings
3. October 25, 20082flash flood warnings
4. June 20, 20081flash flood warnings
5. June 21, 20081flash flood warnings
6. July 7, 20081flash flood warnings
7. July 10, 20081flash flood warnings
8. July 15, 20081flash flood warnings
9. July 29, 20081flash flood warnings
10. August 1, 20081flash flood warnings
11. August 3, 20081flash flood warnings
12. August 7, 20081flash flood warnings

Alerts in force nowTornadoes on recordThe radar archive20072009

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.