Weather alerts in Louisiana, 2025
4,316 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 4,316
- Warnings
- 1,683
- Watches
- 123
- Advisories
- 631
- Busiest month
- May821 alerts
- Busiest day
- May 6, 2025122 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
27 of 120 tornado warnings covering Louisiana in 2025 had a tornado report inside them; 26 of 43 tornado reports fell inside a warning, on average 11 minutes after it went out.
Louisiana, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 120 | 27 | 78% | 43 | 60% | 11 min |
| Severe thunderstorm warnings | 693 | 353 | 49% | 595 | 84% | 20 min |
| Flash flood warnings | 175 | 95 | 46% | 292 | 96% | 295 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lake Charles, LA: tornado warnings | 44 | 3 | 93% | 7 | 43% | 12 min |
| NWS Lake Charles, LA: severe thunderstorm warnings | 196 | 70 | 64% | 144 | 76% | 19 min |
| NWS Lake Charles, LA: flash flood warnings | 73 | 41 | 44% | 131 | 94% | 130 min |
| NWS Jackson, MS: tornado warnings | 100 | 43 | 57% | 114 | 78% | 22 min |
| NWS Jackson, MS: severe thunderstorm warnings | 502 | 289 | 42% | 666 | 82% | 24 min |
| NWS Jackson, MS: flash flood warnings | 56 | 29 | 48% | 72 | 85% | 76 min |
| NWS Shreveport, LA: tornado warnings | 97 | 28 | 71% | 53 | 74% | 19 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 479 | 257 | 46% | 484 | 86% | 23 min |
| NWS Shreveport, LA: flash flood warnings | 104 | 60 | 42% | 144 | 90% | 94 min |
| NWS New Orleans, LA: tornado warnings | 62 | 11 | 82% | 29 | 66% | 13 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 199 | 90 | 55% | 199 | 83% | 20 min |
| NWS New Orleans, LA: flash flood warnings | 67 | 35 | 48% | 117 | 97% | 562 min |
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.
The alerts
4,316 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Caddo Parish273
- Calcasieu Parish268
- Bossier Parish262
- Tangipahoa Parish253
- Saint Tammany Parish249
- Orleans Parish238
- De Soto Parish232
- Livingston Parish229
- Jefferson Parish227
- Union Parish224
- Webster Parish224
- East Baton Rouge Parish224
- Natchitoches Parish223
- Washington Parish216
- Ouachita Parish215
- Winn Parish215
- Rapides Parish212
- Saint Helena Parish210
- Vernon Parish209
- Saint John the Baptist Parish207
- Sabine Parish204
- Lafayette Parish202
- Bienville Parish201
- Jackson Parish198
- Grant Parish196
- Jefferson Davis Parish194
- Caldwell Parish193
- Red River Parish191
- Saint Martin Parish190
- West Baton Rouge Parish190
- Acadia Parish186
- Beauregard Parish186
- Claiborne Parish185
- Madison Parish184
- West Feliciana Parish184
- Avoyelles Parish181
- Lincoln Parish180
- Cameron Parish179
- East Carroll Parish179
- Ascension Parish179
24 more counties
- Saint Bernard Parish179
- LaSalle Parish178
- East Feliciana Parish178
- Saint Landry Parish176
- Tensas Parish176
- Pointe Coupee Parish174
- Allen Parish173
- Evangeline Parish172
- Vermilion Parish171
- Concordia Parish171
- Morehouse Parish170
- Iberville Parish168
- West Carroll Parish167
- Saint James Parish167
- Franklin Parish166
- Catahoula Parish158
- Richland Parish156
- Plaquemines Parish152
- Iberia Parish147
- Assumption Parish140
- St. Mary Parish134
- Saint Charles Parish120
- Lafourche Parish89
- Terrebonne Parish70
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
Sources
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.