Severe Thunderstorm Warnings in Dickson County, Tennessee, 2012

By month

32 of 53 severe thunderstorm warnings covering Dickson County in 2012 had a qualifying storm report inside them; 18 of 25 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.

Dickson 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 8, 20127severe thunderstorm warnings
2. March 15, 20125severe thunderstorm warnings
3. March 14, 20124severe thunderstorm warnings
4. July 20, 20124severe thunderstorm warnings
5. August 17, 20124severe thunderstorm warnings
6. January 23, 20123severe thunderstorm warnings
7. March 2, 20123severe thunderstorm warnings
8. July 18, 20123severe thunderstorm warnings
9. August 1, 20123severe thunderstorm warnings
10. July 6, 20122severe thunderstorm 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.