Tornado Warnings in Louisiana, 2008

By month

64 of 316 tornado warnings covering Louisiana in 2008 had a tornado report inside them; 94 of 131 tornado reports fell inside a warning, on average 15 minutes after it went out.

Louisiana, 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.

• Rapides Parish41
• Allen Parish32
• Evangeline Parish28
• Vernon Parish28
• Saint Landry Parish27
• Acadia Parish27
• Saint Tammany Parish26
• Vermilion Parish25
• Washington Parish24
• Tangipahoa Parish23
• Avoyelles Parish23
• Jefferson Davis Parish19
• Lafayette Parish19
• Beauregard Parish18
• Catahoula Parish17
• Cameron Parish15
• Saint Martin Parish15
• Saint Helena Parish14
• Franklin Parish13
• Plaquemines Parish13
• East Carroll Parish11
• Jefferson Parish11
• Madison Parish10
• East Feliciana Parish9
• Iberia Parish9
• Richland Parish9
• Calcasieu Parish9
• Natchitoches Parish9
• West Feliciana Parish8
• Winn Parish8
• Concordia Parish7
• Tensas Parish7
• Jackson Parish7
• Morehouse Parish7
• Webster Parish7
• Sabine Parish7
• Caldwell Parish7
• Livingston Parish7
• Lincoln Parish6
• Ouachita Parish6

1. September 3, 200857tornado warnings
2. September 13, 200850tornado warnings
3. September 2, 200836tornado warnings
4. September 12, 200828tornado warnings
5. December 9, 200827tornado warnings
6. September 1, 200813tornado warnings
7. March 15, 200811tornado warnings
8. September 14, 200810tornado warnings
9. January 10, 20088tornado warnings
10. February 6, 20087tornado warnings
11. February 12, 20087tornado warnings
12. May 15, 20087tornado 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.