Weather alerts in Louisiana, 2022
3,579 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 3,579
- Warnings
- 1,423
- Watches
- 108
- Advisories
- 541
- Busiest month
- May486 alerts
- Busiest day
- December 14, 2022155 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
36 of 162 tornado warnings covering Louisiana in 2022 had a tornado report inside them; 64 of 85 tornado reports fell inside a warning, on average 16 minutes after it went out.
Louisiana, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 162 | 36 | 78% | 85 | 75% | 16 min |
| Severe thunderstorm warnings | 333 | 145 | 56% | 338 | 68% | 21 min |
| Flash flood warnings | 141 | 54 | 62% | 112 | 84% | 70 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 161 | 69 | 57% | 236 | 80% | 22 min |
| NWS Jackson, MS: severe thunderstorm warnings | 417 | 252 | 40% | 784 | 69% | 27 min |
| NWS Jackson, MS: flash flood warnings | 85 | 44 | 48% | 195 | 88% | 85 min |
| NWS Shreveport, LA: tornado warnings | 108 | 33 | 69% | 79 | 72% | 20 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 263 | 151 | 43% | 427 | 73% | 22 min |
| NWS Shreveport, LA: flash flood warnings | 29 | 16 | 45% | 48 | 73% | 143 min |
| NWS Lake Charles, LA: tornado warnings | 51 | 4 | 92% | 19 | 32% | 22 min |
| NWS Lake Charles, LA: severe thunderstorm warnings | 83 | 17 | 80% | 50 | 42% | 18 min |
| NWS Lake Charles, LA: flash flood warnings | 59 | 20 | 66% | 49 | 90% | 73 min |
| NWS New Orleans, LA: tornado warnings | 67 | 16 | 76% | 38 | 89% | 12 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 121 | 31 | 74% | 105 | 62% | 17 min |
| NWS New Orleans, LA: flash flood warnings | 83 | 33 | 60% | 75 | 88% | 59 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
3,579 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 333 |
| Tornado Warning | 162 |
| Severe Thunderstorm Watch | 17 |
| Tornado Watch | 33 |
| Mesoscale Discussion | 127 |
| Special Weather Statement | 1,380 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 141 |
| River Flood Warning | 84 |
| Flood Watch | 22 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 155 |
| Winter | |
| Winter Weather Advisory | 11 |
| Heat | |
| Excessive Heat Warning | 8 |
| Heat Advisory | 82 |
| Cold | |
| Freeze Warning | 24 |
| Hard Freeze Warning | 21 |
| Freeze Watch | 12 |
| Hard Freeze Watch | 5 |
| Wind Chill Watch | 1 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 3 |
| Wind Advisory | 52 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 60 |
| Coast and beach | |
| Coastal Flood Advisory | 10 |
| Marine | |
| Gale Warning | 20 |
| Special Marine Warning | 610 |
| Gale Watch | 13 |
| Low Water Advisory | 10 |
| Marine Dense Fog Advisory | 49 |
| Small Craft Advisory | 107 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Saint Tammany Parish300
- Tangipahoa Parish246
- Orleans Parish216
- East Baton Rouge Parish211
- Washington Parish208
- Caddo Parish201
- Saint Helena Parish197
- Bossier Parish194
- De Soto Parish185
- Natchitoches Parish183
- Livingston Parish180
- Bienville Parish174
- Webster Parish174
- East Feliciana Parish173
- West Baton Rouge Parish172
- Rapides Parish168
- Jefferson Parish166
- Union Parish164
- Claiborne Parish163
- Saint John the Baptist Parish160
- Lincoln Parish160
- Sabine Parish160
- Ouachita Parish159
- Winn Parish156
- Saint Landry Parish155
- Avoyelles Parish154
- Jackson Parish154
- East Carroll Parish153
- Madison Parish153
- Red River Parish153
- Iberville Parish152
- West Feliciana Parish151
- Vernon Parish150
- Evangeline Parish149
- Pointe Coupee Parish149
- Saint James Parish148
- Tensas Parish146
- Caldwell Parish146
- Allen Parish145
- Ascension Parish143
24 more counties
- Franklin Parish142
- West Carroll Parish141
- LaSalle Parish140
- Concordia Parish139
- Morehouse Parish139
- Saint Martin Parish138
- Richland Parish138
- Grant Parish138
- Beauregard Parish134
- Saint Bernard Parish130
- Assumption Parish129
- Lafayette Parish125
- Catahoula Parish122
- Cameron Parish116
- Calcasieu Parish110
- Saint Charles Parish110
- Plaquemines Parish108
- Jefferson Davis Parish81
- Acadia Parish69
- Lafourche Parish63
- Terrebonne Parish50
- Vermilion Parish44
- St. Mary Parish44
- Iberia Parish36
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.