Alert archive / Louisiana / Flash Flood Warnings
Flash Flood Warnings in Louisiana, 2023
98 flash flood warnings in 2023. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Flash Flood Warnings
- 98
- Busiest month
- January26 flash flood warnings
- Busiest day
- January 3, 20239 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
45 of 98 flash flood warnings covering Louisiana in 2023 had a flash flood report inside them; 82 of 96 flash flood reports fell inside a warning, on average 79 minutes after it went out.
Louisiana, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 98 | 45 | 54% | 96 | 85% | 79 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: flash flood warnings | 55 | 27 | 51% | 86 | 83% | 85 min |
| NWS New Orleans, LA: flash flood warnings | 53 | 16 | 70% | 45 | 96% | 90 min |
| NWS Shreveport, LA: flash flood warnings | 54 | 36 | 33% | 96 | 89% | 72 min |
| NWS Lake Charles, LA: flash flood warnings | 40 | 13 | 68% | 26 | 65% | 66 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
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 4:42 PM CST | Flash Flood Warning | SHV | Bienville, Natchitoches, Red River | 3 hr |
| Jan 2, 4:58 PM CST | Flash Flood Warning | SHV | De Soto, Natchitoches, Red River, Sabine | 5 hr |
| Jan 2, 5:01 PM CST | Flash Flood Warning | SHV | Bienville, Jackson, Lincoln, Natchitoches, Ouachita, Winn | 3 hr |
| Jan 2, 5:17 PM CST | Flash Flood Warning | SHV | Grant, Natchitoches, Winn | 3 hr |
| Jan 2, 5:42 PM CST | Flash Flood Warning | SHV | Grant, Jackson, Lincoln, Natchitoches, Ouachita, Union and 1 more | 3 hr |
| Jan 2, 7:22 PM CST | Flash Flood Warning | SHV | Caldwell, Jackson, Ouachita, Union | 3 hr |
| Jan 2, 7:46 PM CST | Flash Flood Warning | JAN | Morehouse | 4 hr |
| Jan 2, 7:50 PM CST | Flash Flood Warning | SHV | Bossier, Caddo, De Soto, Webster | 5 hr |
| Jan 2, 7:55 PM CST | Flash Flood Warning | SHV | Bossier, Caddo, Webster | 7 hr |
| Jan 2, 8:49 PM CST | Flash Flood Warning | SHV | Bienville, Claiborne, Union | 5 hr |
| Jan 2, 9:03 PM CST | Flash Flood Warning | SHV | Bossier, Caddo, De Soto | 3 hr |
| Jan 2, 11:24 PM CST | Flash Flood Warning | SHV | Claiborne, Webster | 3 hr |
| Jan 3, 6:56 AM CST | Flash Flood Warning | JAN | Morehouse | 3 hr |
| Jan 3, 8:39 AM CST | Flash Flood Warning | LCH | Avoyelles, Rapides | 3 hr |
| Jan 8, 1:55 AM CST | Flash Flood Warning | JAN | Richland | 2 hr |
| Jan 8, 2:19 AM CST | Flash Flood Warning | SHV | Winn | 3 hr |
| Jan 8, 4:15 AM CST | Flash Flood Warning | LCH | Allen, Beauregard, Evangeline, Vernon | 3 hr |
| Jan 8, 6:56 AM CST | Flash Flood Warning | LCH | Acadia, Calcasieu, Jefferson Davis | 53 min |
| Jan 21, 5:13 AM CST | Flash Flood Warning | LIX | East Baton Rouge, Livingston, West Baton Rouge | 107 min |
| Jan 24, 4:22 PM CST | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu, Vernon | 3 hr |
| Jan 24, 4:24 PM CST | Flash Flood Warning | LCH | Calcasieu, Cameron | 3 hr |
| Jan 24, 5:55 PM CST | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Rapides, Vernon | 3 hr |
| Jan 24, 6:54 PM CST | Flash Flood Warning | LCH | Acadia, Jefferson Davis, Lafayette, Saint Landry, Saint Martin, Vermilion | 3 hr |
| Jan 29, 9:46 AM CST | Flash Flood Warning | LIX | East Baton Rouge | 4 hr |
| Jan 29, 11:04 AM CST | Flash Flood Warning | LIX | Livingston | 3 hr |
| Jan 29, 11:15 AM CST | Flash Flood Warning | LIX | Tangipahoa | 3 hr |
| Feb 8, 4:19 PM CST | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu | 3 hr |
| Feb 8, 9:29 PM CST | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa, Washington | 5 hr |
| Feb 8, 10:23 PM CST | Flash Flood Warning | LIX | Saint Tammany, Washington | 5 hr |
| Feb 8, 10:30 PM CST | Flash Flood Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint John the Baptist, Terrebonne | 4 hr |
| Feb 8, 11:09 PM CST | Flash Flood Warning | LIX | Saint Tammany, Washington | 4 hr |
| Feb 8, 11:14 PM CST | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles | 4 hr |
| Feb 16, 11:39 AM CST | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more | 2 hr |
| Feb 16, 4:51 PM CST | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee, Saint Helena and 2 more | 117 min |
| Mar 27, 8:02 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, Iberville, West Baton Rouge | 3 hr |
| Apr 6, 2:49 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, De Soto | 3 hr |
| Apr 6, 4:18 AM CDT | Flash Flood Warning | SHV | De Soto | 3 hr |
| Apr 6, 6:52 PM CDT | Flash Flood Warning | LCH | Cameron | 5 hr |
| Apr 6, 7:44 PM CDT | Flash Flood Warning | LCH | Calcasieu, Cameron | 3 hr |
| Apr 6, 8:31 PM CDT | Flash Flood Warning | LCH | Calcasieu, Cameron, Jefferson Davis | 3 hr |
| Apr 7, 12:47 AM CDT | Flash Flood Warning | LCH | Acadia, Calcasieu, Cameron, Jefferson Davis, Lafayette, Saint Landry and 1 more | 5 hr |
| Apr 7, 1:43 AM CDT | Flash Flood Warning | LCH | Calcasieu, Jefferson Davis | 4 hr |
| Apr 7, 10:03 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana | 3 hr |
| Apr 15, 11:57 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Livingston | 2 hr |
| Apr 27, 4:51 AM CDT | Flash Flood Warning | JAN | Franklin, Tensas | 108 min |
| Apr 29, 3:36 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 103 min |
| May 5, 5:18 AM CDT | Flash Flood Warning | LCH | Saint Landry, Saint Martin | 52 min |
| May 9, 12:41 PM CDT | Flash Flood Warning | LIX | Orleans | 5 hr |
| May 9, 2:28 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans | 2 hr |
| May 9, 7:49 PM CDT | Flash Flood Warning | LCH | Calcasieu | 3 hr |
| May 11, 6:18 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, De Soto | 6 hr |
| May 11, 7:44 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, De Soto, Red River, Sabine | 6 hr |
| May 11, 10:17 AM CDT | Flash Flood Warning | SHV | De Soto, Natchitoches, Red River, Winn | 3 hr |
| May 11, 10:46 AM CDT | Flash Flood Warning | SHV | Claiborne | 6 hr |
| May 11, 12:00 PM CDT | Flash Flood Warning | SHV | Claiborne, Union | 5 hr |
| Jun 3, 5:32 PM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Caddo, De Soto, Red River | 3 hr |
| Jun 3, 6:01 PM CDT | Flash Flood Warning | SHV | Bossier, Caddo | 119 min |
| Jun 3, 10:03 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, West Baton Rouge | 3 hr |
| Jun 17, 4:49 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, Livingston, West Baton Rouge | 51 min |
| Jun 19, 9:10 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Jun 19, 9:55 PM CDT | Flash Flood Warning | LIX | Saint Tammany, Tangipahoa | 3 hr |
| Jun 19, 11:19 PM CDT | Flash Flood Warning | LIX | Livingston, Saint Helena, Tangipahoa | 5 hr |
| Jun 20, 6:19 PM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Saint James, Saint John the Baptist | 3 hr |
| Jul 5, 1:52 PM CDT | Flash Flood Warning | LIX | Orleans, Saint Bernard | 3 hr |
| Jul 5, 4:56 PM CDT | Flash Flood Warning | LCH | Saint Martin, St. Mary | 3 hr |
| Jul 5, 9:29 PM CDT | Flash Flood Warning | LCH | Calcasieu | 3 hr |
| Jul 6, 6:01 PM CDT | Flash Flood Warning | JAN | Franklin, Richland | 119 min |
| Jul 6, 6:15 PM CDT | Flash Flood Warning | SHV | Caldwell, Jackson, Ouachita | 12 min |
| Jul 6, 6:52 PM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Caddo, De Soto, Red River, Webster | 2 hr |
| Jul 6, 7:10 PM CDT | Flash Flood Warning | SHV | Bienville, Caldwell, Jackson, Natchitoches, Ouachita, Winn | 3 hr |
| Jul 6, 8:10 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Tensas | 95 min |
| Jul 8, 1:42 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans | 113 min |
| Jul 10, 6:35 PM CDT | Flash Flood Warning | LCH | Calcasieu | 70 min |
| Jul 12, 5:52 AM CDT | Flash Flood Warning | SHV | Claiborne, Union, Webster | 4 hr |
| Jul 12, 8:19 AM CDT | Flash Flood Warning | SHV | Claiborne | 3 hr |
| Jul 16, 3:52 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Saint Bernard | 50 min |
| Jul 16, 4:22 PM CDT | Flash Flood Warning | LIX | East Feliciana | 3 hr |
| Jul 16, 4:50 PM CDT | Flash Flood Warning | LIX | East Feliciana | 3 hr |
| Jul 22, 7:30 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Saint Bernard | 64 min |
| Aug 28, 5:59 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 64 min |
| Aug 29, 3:42 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 98 min |
| Sep 4, 11:54 AM CDT | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Sep 4, 12:11 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Saint Charles | 3 hr |
| Sep 4, 12:52 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 113 min |
| Sep 4, 3:15 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Saint Charles | 3 hr |
| Sep 25, 5:39 AM CDT | Flash Flood Warning | LIX | Tangipahoa | 111 min |
| Sep 25, 3:38 PM CDT | Flash Flood Warning | LIX | Jefferson | 112 min |
| Sep 25, 5:21 PM CDT | Flash Flood Warning | LIX | Jefferson | 61 min |
| Nov 20, 3:51 PM CST | Flash Flood Warning | LCH | Vernon | 3 hr |
| Nov 20, 5:55 PM CST | Flash Flood Warning | JAN | Concordia, Tensas | 2 hr |
| Nov 20, 8:02 PM CST | Flash Flood Warning | LCH | Avoyelles, Evangeline | 118 min |
| Nov 21, 1:34 AM CST | Flash Flood Warning | LIX | Saint Charles, Saint James, Saint John the Baptist | 93 min |
| Nov 30, 9:31 PM CST | Flash Flood Warning | LCH | Calcasieu, Cameron, Jefferson Davis | 3 hr |
| Dec 1, 1:34 AM CST | Flash Flood Warning | LCH | Acadia, Jefferson Davis, Lafayette, Saint Landry, Saint Martin, Vermilion | 2 hr |
| Dec 1, 4:33 AM CST | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge | 67 min |
| Dec 1, 9:26 PM CST | Flash Flood Warning | LCH | Lafayette, Saint Martin, Vermilion | 88 min |
| Dec 1, 9:57 PM CST | Flash Flood Warning | LCH | Saint Martin, St. Mary | 3 hr |
| Dec 2, 5:10 AM CST | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Jefferson Parish13
- Calcasieu Parish12
- Orleans Parish12
- East Baton Rouge Parish11
- De Soto Parish10
- Bossier Parish9
- Caddo Parish9
- Livingston Parish8
- West Baton Rouge Parish8
- Natchitoches Parish7
- Jefferson Davis Parish7
- Saint Tammany Parish7
- Saint Bernard Parish7
- Bienville Parish6
- Red River Parish6
- Winn Parish6
- Claiborne Parish6
- Cameron Parish6
- Saint Martin Parish6
- East Feliciana Parish6
- Iberville Parish6
- Jackson Parish5
- Ouachita Parish5
- Union Parish5
- Webster Parish5
- Tangipahoa Parish5
- Saint Charles Parish5
- Allen Parish4
- Vernon Parish4
- Acadia Parish4
- Lafayette Parish4
- Saint Landry Parish4
- Vermilion Parish4
- Saint Helena Parish4
- Plaquemines Parish4
- Caldwell Parish3
- Avoyelles Parish3
- Beauregard Parish3
- Evangeline Parish3
- Washington Parish3
19 more counties
- Saint John the Baptist Parish3
- Pointe Coupee Parish3
- West Feliciana Parish3
- Ascension Parish3
- Franklin Parish3
- Tensas Parish3
- Sabine Parish2
- Lincoln Parish2
- Grant Parish2
- Morehouse Parish2
- Rapides Parish2
- Richland Parish2
- Lafourche Parish2
- Saint James Parish2
- St. Mary Parish2
- Concordia Parish2
- Terrebonne Parish1
- Assumption Parish1
- Catahoula Parish1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20222024
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.