Weather alerts in Louisiana, 2024
4,447 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 4,447
- Warnings
- 2,073
- Watches
- 159
- Advisories
- 684
- Busiest month
- May781 alerts
- Busiest day
- April 10, 2024153 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
57 of 168 tornado warnings covering Louisiana in 2024 had a tornado report inside them; 80 of 116 tornado reports fell inside a warning, on average 16 minutes after it went out.
Louisiana, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 168 | 57 | 66% | 116 | 69% | 16 min |
| Severe thunderstorm warnings | 570 | 286 | 50% | 646 | 83% | 26 min |
| Flash flood warnings | 249 | 129 | 48% | 324 | 91% | 111 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 51 | 21 | 59% | 75 | 76% | 22 min |
| NWS Jackson, MS: severe thunderstorm warnings | 300 | 174 | 42% | 631 | 76% | 27 min |
| NWS Jackson, MS: flash flood warnings | 71 | 38 | 46% | 114 | 85% | 127 min |
| NWS New Orleans, LA: tornado warnings | 48 | 15 | 69% | 40 | 63% | 13 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 173 | 73 | 58% | 244 | 85% | 25 min |
| NWS New Orleans, LA: flash flood warnings | 105 | 52 | 50% | 147 | 90% | 85 min |
| NWS Lake Charles, LA: tornado warnings | 107 | 18 | 83% | 48 | 69% | 21 min |
| NWS Lake Charles, LA: severe thunderstorm warnings | 278 | 126 | 55% | 368 | 77% | 26 min |
| NWS Lake Charles, LA: flash flood warnings | 152 | 83 | 45% | 269 | 91% | 135 min |
| NWS Shreveport, LA: tornado warnings | 109 | 45 | 59% | 84 | 74% | 15 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 331 | 185 | 44% | 406 | 85% | 25 min |
| NWS Shreveport, LA: flash flood warnings | 84 | 44 | 48% | 128 | 88% | 93 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
4,447 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.
- Saint Tammany Parish339
- Calcasieu Parish320
- Caddo Parish289
- Orleans Parish287
- Vernon Parish281
- Livingston Parish279
- Jefferson Parish273
- Tangipahoa Parish269
- Rapides Parish266
- Bossier Parish261
- Jefferson Davis Parish260
- Allen Parish258
- East Baton Rouge Parish257
- De Soto Parish253
- Beauregard Parish252
- Saint Martin Parish249
- Cameron Parish248
- Acadia Parish246
- Vermilion Parish244
- Saint John the Baptist Parish243
- Lafayette Parish241
- Saint Landry Parish233
- Washington Parish232
- Bienville Parish229
- West Baton Rouge Parish228
- Saint Bernard Parish227
- Ascension Parish224
- Evangeline Parish222
- Saint James Parish221
- East Feliciana Parish220
- Natchitoches Parish220
- Pointe Coupee Parish218
- Sabine Parish218
- Webster Parish216
- Iberville Parish214
- Saint Helena Parish212
- West Feliciana Parish211
- Assumption Parish210
- Red River Parish209
- Avoyelles Parish207
24 more counties
- Iberia Parish201
- St. Mary Parish200
- Winn Parish189
- Plaquemines Parish183
- Grant Parish178
- Claiborne Parish170
- Jackson Parish165
- LaSalle Parish165
- Union Parish164
- Lincoln Parish162
- Saint Charles Parish156
- Concordia Parish155
- Ouachita Parish152
- Caldwell Parish151
- Tensas Parish150
- Madison Parish145
- Franklin Parish142
- Catahoula Parish139
- Morehouse Parish137
- Richland Parish137
- East Carroll Parish129
- West Carroll Parish129
- Lafourche Parish123
- Terrebonne Parish90
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.