Weather alerts in Louisiana, 2026
3,259 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 3,259
- Warnings
- 1,300
- Watches
- 90
- Advisories
- 456
- Busiest month
- June592 alerts
- Busiest day
- June 18, 2026129 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
30 of 108 tornado warnings covering Louisiana in 2026 had a tornado report inside them; 42 of 58 tornado reports fell inside a warning, on average 13 minutes after it went out.
Louisiana, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 108 | 30 | 72% | 58 | 72% | 13 min |
| Severe thunderstorm warnings | 407 | 248 | 39% | 473 | 81% | 23 min |
| Flash flood warnings | 172 | 116 | 33% | 245 | 95% | 83 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New Orleans, LA: tornado warnings | 88 | 26 | 70% | 54 | 67% | 15 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 180 | 96 | 47% | 249 | 74% | 19 min |
| NWS New Orleans, LA: flash flood warnings | 119 | 78 | 34% | 166 | 93% | 87 min |
| NWS Jackson, MS: tornado warnings | 42 | 26 | 38% | 74 | 78% | 23 min |
| NWS Jackson, MS: severe thunderstorm warnings | 407 | 270 | 34% | 674 | 80% | 24 min |
| NWS Jackson, MS: flash flood warnings | 56 | 29 | 48% | 71 | 86% | 60 min |
| NWS Shreveport, LA: tornado warnings | 49 | 6 | 88% | 16 | 50% | 17 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 299 | 193 | 35% | 427 | 87% | 25 min |
| NWS Shreveport, LA: flash flood warnings | 74 | 42 | 43% | 114 | 96% | 86 min |
| NWS Lake Charles, LA: tornado warnings | 33 | 10 | 70% | 19 | 89% | 12 min |
| NWS Lake Charles, LA: severe thunderstorm warnings | 100 | 51 | 49% | 149 | 77% | 23 min |
| NWS Lake Charles, LA: flash flood warnings | 73 | 51 | 30% | 132 | 91% | 112 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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
3,259 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.
- Tangipahoa Parish259
- Saint Tammany Parish245
- Livingston Parish209
- Jefferson Parish209
- Washington Parish201
- Orleans Parish198
- Saint Charles Parish182
- East Baton Rouge Parish181
- Saint Helena Parish181
- Rapides Parish175
- Caddo Parish171
- Avoyelles Parish162
- Bossier Parish162
- Saint John the Baptist Parish160
- West Baton Rouge Parish157
- East Feliciana Parish154
- Calcasieu Parish149
- Saint Landry Parish147
- Ascension Parish144
- Vernon Parish143
- Lafourche Parish140
- Evangeline Parish139
- West Feliciana Parish139
- Pointe Coupee Parish138
- Iberville Parish137
- Natchitoches Parish137
- Concordia Parish134
- Madison Parish134
- Webster Parish134
- Lafayette Parish133
- Saint Martin Parish133
- Sabine Parish133
- Saint Bernard Parish131
- Assumption Parish129
- Claiborne Parish128
- Union Parish128
- Catahoula Parish126
- De Soto Parish126
- Ouachita Parish126
- Acadia Parish125
24 more counties
- Richland Parish125
- Bienville Parish124
- Vermilion Parish123
- Saint James Parish123
- Plaquemines Parish123
- Tensas Parish122
- Morehouse Parish121
- Jefferson Davis Parish120
- East Carroll Parish119
- St. Mary Parish118
- Franklin Parish118
- Beauregard Parish118
- Terrebonne Parish118
- Allen Parish117
- West Carroll Parish117
- Lincoln Parish117
- Iberia Parish116
- Jackson Parish115
- LaSalle Parish114
- Red River Parish114
- Winn Parish114
- Cameron Parish112
- Grant Parish107
- Caldwell Parish91
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
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.