Tornado Warnings in Louisiana, 2020

By month

28 of 188 tornado warnings covering Louisiana in 2020 had a tornado report inside them; 47 of 77 tornado reports fell inside a warning, on average 16 minutes after it went out.

Louisiana, 2020

Each office's whole area, 2020

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.

• East Baton Rouge Parish20
• Saint Helena Parish19
• Cameron Parish18
• Livingston Parish18
• Tangipahoa Parish17
• East Feliciana Parish16
• Evangeline Parish16
• Vermilion Parish16
• Rapides Parish15
• Jefferson Davis Parish14
• Calcasieu Parish13
• Avoyelles Parish13
• Acadia Parish13
• Saint Landry Parish13
• Bienville Parish10
• Beauregard Parish10
• West Baton Rouge Parish10
• Lafayette Parish10
• Vernon Parish9
• Pointe Coupee Parish8
• Bossier Parish7
• Webster Parish7
• Washington Parish7
• Iberville Parish7
• Allen Parish7
• Ascension Parish7
• Iberia Parish7
• Natchitoches Parish6
• Winn Parish6
• Saint Martin Parish6
• Caddo Parish5
• Claiborne Parish5
• Saint Tammany Parish5
• St. Mary Parish5
• Red River Parish4
• Ouachita Parish4
• Lafourche Parish4
• Saint Charles Parish4
• West Feliciana Parish4
• Union Parish3

1. August 26, 202037tornado warnings
2. August 27, 202028tornado warnings
3. April 12, 202017tornado warnings
4. April 23, 202015tornado warnings
5. June 24, 202011tornado warnings
6. May 8, 202010tornado warnings
7. January 11, 20208tornado warnings
8. September 23, 20208tornado warnings
9. April 19, 20206tornado warnings
10. December 14, 20206tornado warnings
11. December 24, 20206tornado warnings
12. May 17, 20205tornado warnings

Alerts in force nowTornadoes on recordThe radar archive20192021

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.