Flash Flood Warnings in Puerto Rico, 2008

By month

0 of 76 flash flood warnings covering Puerto Rico in 2008 had a flash flood report inside them; 0 of 10 flash flood reports fell inside a warning.

Puerto Rico, 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.

1. April 27, 20088flash flood warnings
2. September 21, 20088flash flood warnings
3. September 3, 20087flash flood warnings
4. August 15, 20086flash flood warnings
5. September 24, 20085flash flood warnings
6. October 13, 20085flash flood warnings
7. September 23, 20084flash flood warnings
8. April 28, 20083flash flood warnings
9. August 25, 20083flash flood warnings
10. September 25, 20083flash flood warnings
11. May 2, 20082flash flood warnings
12. September 22, 20082flash 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.