Flash Flood Warnings in Mohave County, Arizona, 2012

By month

24 of 79 flash flood warnings covering Mohave County in 2012 had a flash flood report inside them; 24 of 35 flash flood reports fell inside a warning, on average 52 minutes after it went out.

Mohave County, 2012

Each office's whole area, 2012

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. July 15, 20128flash flood warnings
2. July 31, 20127flash flood warnings
3. July 14, 20126flash flood warnings
4. August 9, 20125flash flood warnings
5. September 4, 20125flash flood warnings
6. August 20, 20124flash flood warnings
7. August 21, 20124flash flood warnings
8. July 16, 20123flash flood warnings
9. July 30, 20123flash flood warnings
10. August 2, 20123flash flood warnings

Alerts in force nowTornadoes on recordForecastThe radar archive20112013

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.