Alert archive / Louisiana / Flash Flood Warnings

Flash Flood Warnings in Louisiana, 2022

141 flash flood warnings in 2022. 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 2022. Tap one for its archive.

Flash Flood Warnings
141
Busiest month
August39 flash flood warnings
Busiest day
December 14, 202218 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.

54 of 141 flash flood warnings covering Louisiana in 2022 had a flash flood report inside them; 94 of 112 flash flood reports fell inside a warning, on average 70 minutes after it went out.

Louisiana, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Flash flood warnings1415462%11284%70 min

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Jackson, MS: flash flood warnings854448%19588%85 min
NWS Shreveport, LA: flash flood warnings291645%4873%143 min
NWS Lake Charles, LA: flash flood warnings592066%4990%73 min
NWS New Orleans, LA: flash flood warnings833360%7588%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

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.

IssuedProductOfficeCountiesLasted
Jan 19, 11:21 PM CSTFlash Flood WarningLCHBeauregard, Calcasieu3 hr
Feb 3, 11:29 AM CSTFlash Flood WarningLIXSaint Tammany, Tangipahoa, Washington3 hr
Feb 3, 11:36 AM CSTFlash Flood WarningLIXWashington5 hr
Feb 3, 12:28 PM CSTFlash Flood WarningLIXSaint Charles, Saint James, Saint John the Baptist3 hr
Feb 3, 12:30 PM CSTFlash Flood WarningLIXLafourche, Terrebonne3 hr
Feb 3, 1:13 PM CSTFlash Flood WarningLIXSaint Tammany4 hr
Feb 3, 2:03 PM CSTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard3 hr
Feb 3, 2:19 PM CSTFlash Flood WarningLIXSaint Tammany3 hr
Feb 3, 3:56 PM CSTFlash Flood WarningLIXSaint Charles, Saint James, Saint John the Baptist2 hr
Mar 22, 2:12 AM CDTFlash Flood WarningSHVBossier, Caddo, Claiborne, Webster5 hr
Mar 22, 3:25 AM CDTFlash Flood WarningSHVBossier, Caddo, De Soto110 min
Mar 22, 4:58 AM CDTFlash Flood WarningSHVBienville, Bossier, Caddo, De Soto, Red River, Sabine3 hr
Mar 22, 10:42 AM CDTFlash Flood WarningLCHAllen, Avoyelles, Beauregard, Evangeline, Rapides, Vernon3 hr
Mar 22, 12:29 PM CDTFlash Flood WarningLCHAcadia, Allen, Avoyelles, Evangeline, Jefferson Davis, Rapides and 1 more3 hr
Mar 22, 1:14 PM CDTFlash Flood WarningLIXEast Feliciana, Pointe Coupee, West Feliciana3 hr
Mar 22, 1:43 PM CDTFlash Flood WarningLCHAcadia, Avoyelles, Lafayette, Saint Landry, Saint Martin3 hr
Mar 22, 3:06 PM CDTFlash Flood WarningLIXEast Feliciana, Saint Helena, Tangipahoa3 hr
Mar 22, 4:20 PM CDTFlash Flood WarningLIXEast Baton Rouge, East Feliciana, Livingston, Pointe Coupee, Saint Helena, West Baton Rouge100 min
Mar 22, 7:29 PM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard58 min
Mar 30, 5:55 PM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge80 min
Mar 30, 6:08 PM CDTFlash Flood WarningLIXAscension, East Baton Rouge, Iberville, Livingston77 min
Mar 30, 7:23 PM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa65 min
Mar 30, 8:18 PM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard, Saint Charles68 min
Apr 5, 9:24 AM CDTFlash Flood WarningLIXSaint Helena2 hr
Apr 5, 10:11 AM CDTFlash Flood WarningLIXSaint Helena, Tangipahoa, Washington3 hr
Apr 5, 12:04 PM CDTFlash Flood WarningLIXLivingston, Saint Helena, Saint Tammany, Tangipahoa, Washington82 min
Apr 12, 11:37 PM CDTFlash Flood WarningSHVBienville, De Soto, Natchitoches, Red River, Sabine, Winn3 hr
Apr 13, 1:02 AM CDTFlash Flood WarningSHVCaldwell, Grant, LaSalle, Natchitoches, Sabine, Winn3 hr
Apr 13, 11:36 PM CDTFlash Flood WarningLIXSaint Charles, Saint John the Baptist109 min
Apr 14, 12:00 AM CDTFlash Flood WarningLIXJefferson, Orleans90 min
May 1, 1:42 PM CDTFlash Flood WarningLCHIberia, Vermilion3 hr
May 1, 4:04 PM CDTFlash Flood WarningLCHJefferson Davis3 hr
May 13, 3:44 PM CDTFlash Flood WarningLIXAscension, Assumption, Iberville, Saint James3 hr
May 13, 3:47 PM CDTFlash Flood WarningLIXAscension, East Baton Rouge, Livingston, West Baton Rouge3 hr
May 13, 4:14 PM CDTFlash Flood WarningLIXIberville, Pointe Coupee, West Baton Rouge2 hr
May 13, 5:16 PM CDTFlash Flood WarningLCHIberia, St. Mary119 min
May 14, 6:50 PM CDTFlash Flood WarningLCHIberia, Saint Martin3 hr
May 14, 7:45 PM CDTFlash Flood WarningLCHSaint Martin3 hr
May 21, 5:48 PM CDTFlash Flood WarningLIXAscension, Assumption, Iberville, Saint James2 hr
May 22, 9:12 AM CDTFlash Flood WarningLCHAcadia, Jefferson Davis93 min
May 22, 10:23 PM CDTFlash Flood WarningLIXAscension, Assumption, Saint James3 hr
May 24, 1:49 AM CDTFlash Flood WarningLIXSaint Tammany4 hr
May 25, 12:03 PM CDTFlash Flood WarningLIXSaint Charles, Saint John the Baptist4 hr
May 25, 1:34 PM CDTFlash Flood WarningLIXSaint Tammany3 hr
May 25, 1:38 PM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles3 hr
Jun 9, 7:19 PM CDTFlash Flood WarningLIXSaint Helena3 hr
Jun 10, 9:11 AM CDTFlash Flood WarningLIXOrleans, Saint Bernard6 hr
Jun 10, 10:34 AM CDTFlash Flood WarningJANMorehouse107 min
Jun 10, 11:34 AM CDTFlash Flood WarningLIXJefferson, Orleans3 hr
Jun 30, 12:47 PM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles78 min
Jun 30, 2:15 PM CDTFlash Flood WarningLIXLafourche, Saint Charles, Saint John the Baptist82 min
Jun 30, 3:41 PM CDTFlash Flood WarningLIXLivingston, Saint Helena, Tangipahoa78 min
Jul 1, 10:54 AM CDTFlash Flood WarningLCHCameron5 hr
Jul 2, 5:21 AM CDTFlash Flood WarningSHVBienville3 hr
Jul 3, 11:35 AM CDTFlash Flood Warning Considerable damage threatSHVClaiborne, Union3 hr
Jul 5, 11:30 AM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard3 hr
Jul 12, 4:44 PM CDTFlash Flood WarningLIXEast Baton Rouge, Iberville, West Baton Rouge91 min
Jul 20, 5:09 PM CDTFlash Flood WarningLIXOrleans, Saint Bernard3 hr
Jul 20, 6:11 PM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard109 min
Jul 22, 4:59 AM CDTFlash Flood WarningLIXTangipahoa2 hr
Jul 22, 6:35 AM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge2 hr
Jul 26, 2:09 PM CDTFlash Flood WarningLIXEast Baton Rouge108 min
Jul 26, 2:49 PM CDTFlash Flood WarningLIXEast Baton Rouge68 min
Jul 27, 2:30 PM CDTFlash Flood WarningLIXJefferson, Orleans90 min
Jul 28, 3:09 PM CDTFlash Flood WarningLIXEast Baton Rouge3 hr
Jul 30, 12:16 PM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard64 min
Aug 3, 9:09 AM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge2 hr
Aug 3, 9:41 AM CDTFlash Flood WarningLIXIberville, Pointe Coupee, West Baton Rouge2 hr
Aug 3, 11:33 AM CDTFlash Flood WarningLCHAvoyelles, Saint Landry, Saint Martin3 hr
Aug 3, 12:06 PM CDTFlash Flood WarningLCHIberia, Lafayette, Saint Martin114 min
Aug 3, 12:24 PM CDTFlash Flood WarningLCHIberia, Lafayette, Vermilion3 hr
Aug 3, 12:46 PM CDTFlash Flood WarningLCHSaint Landry119 min
Aug 3, 1:57 PM CDTFlash Flood WarningLCHAvoyelles, Evangeline, Rapides, Saint Landry3 hr
Aug 3, 3:12 PM CDTFlash Flood WarningLCHAllen, Avoyelles, Evangeline, Rapides, Saint Landry3 hr
Aug 3, 5:06 PM CDTFlash Flood WarningLCHAvoyelles, Evangeline, Rapides, Saint Landry114 min
Aug 8, 12:57 PM CDTFlash Flood WarningLIXJefferson2 hr
Aug 9, 1:55 PM CDTFlash Flood WarningLIXJefferson, Orleans95 min
Aug 9, 3:13 PM CDTFlash Flood WarningJANEast Carroll4 hr
Aug 10, 11:34 AM CDTFlash Flood WarningSHVCaldwell, Jackson, Ouachita86 min
Aug 10, 12:17 PM CDTFlash Flood WarningLIXJefferson, Orleans3 hr
Aug 10, 12:58 PM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines2 hr
Aug 10, 2:05 PM CDTFlash Flood WarningLIXEast Baton Rouge2 hr
Aug 10, 3:23 PM CDTFlash Flood WarningLCHIberia, Saint Martin, Vermilion3 hr
Aug 11, 2:14 PM CDTFlash Flood WarningLIXEast Baton Rouge91 min
Aug 18, 5:08 AM CDTFlash Flood WarningJANCatahoula, Franklin, Tensas3 hr
Aug 18, 5:53 AM CDTFlash Flood WarningJANConcordia, Tensas3 hr
Aug 19, 5:55 PM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge40 min
Aug 22, 11:36 PM CDTFlash Flood WarningSHVBossier, Caddo, De Soto3 hr
Aug 23, 3:20 PM CDTFlash Flood WarningJANCatahoula, Franklin3 hr
Aug 24, 5:03 AM CDTFlash Flood WarningJANCatahoula, Franklin, Madison, Tensas6 hr
Aug 24, 5:14 AM CDTFlash Flood WarningSHVGrant, LaSalle3 hr
Aug 24, 8:15 AM CDTFlash Flood WarningJANCatahoula3 hr
Aug 24, 9:26 AM CDTFlash Flood WarningLCHAvoyelles, Rapides, Vernon3 hr
Aug 24, 9:49 AM CDTFlash Flood WarningLCHAllen, Beauregard, Calcasieu4 hr
Aug 24, 10:47 AM CDTFlash Flood WarningLCHCalcasieu, Cameron, Jefferson Davis3 hr
Aug 24, 1:25 PM CDTFlash Flood WarningLCHCalcasieu3 hr
Aug 24, 3:50 PM CDTFlash Flood WarningJANFranklin, Richland2 hr
Aug 24, 4:31 PM CDTFlash Flood WarningJANEast Carroll, Madison119 min
Aug 25, 6:38 PM CDTFlash Flood WarningLCHIberia, Lafayette, Saint Martin3 hr
Aug 25, 7:00 PM CDTFlash Flood WarningLIXPointe Coupee3 hr
Aug 25, 7:28 PM CDTFlash Flood WarningLCHAcadia, Lafayette3 hr
Aug 26, 5:50 AM CDTFlash Flood WarningJANConcordia3 hr
Aug 26, 8:43 AM CDTFlash Flood WarningLIXPointe Coupee82 min
Aug 26, 4:41 PM CDTFlash Flood WarningLCHCalcasieu3 hr
Aug 26, 6:17 PM CDTFlash Flood WarningLIXEast Feliciana73 min
Sep 3, 10:31 AM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard34 min
Sep 3, 12:54 PM CDTFlash Flood WarningLCHAcadia, Lafayette, Saint Landry, Saint Martin3 hr
Sep 3, 2:01 PM CDTFlash Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis119 min
Sep 3, 2:56 PM CDTFlash Flood WarningLIXJefferson, Orleans3 hr
Sep 3, 3:56 PM CDTFlash Flood WarningLCHLafayette, Saint Landry, Saint Martin3 hr
Sep 3, 6:35 PM CDTFlash Flood WarningSHVNatchitoches3 hr
Sep 3, 7:50 PM CDTFlash Flood WarningJANFranklin, Tensas107 min
Nov 24, 4:50 PM CSTFlash Flood WarningLCHAllen, Beauregard, Calcasieu, Cameron, Jefferson Davis2 hr
Nov 30, 3:36 AM CSTFlash Flood WarningLIXSaint Tammany, Tangipahoa, Washington2 hr
Dec 10, 9:48 PM CSTFlash Flood WarningSHVSabine3 hr
Dec 11, 1:49 AM CSTFlash Flood WarningLCHAcadia, Evangeline, Saint Landry3 hr
Dec 11, 2:40 AM CSTFlash Flood WarningLCHAvoyelles, Saint Landry2 hr
Dec 11, 4:26 AM CSTFlash Flood WarningLCHAcadia, Jefferson Davis, Saint Landry2 hr
Dec 11, 5:35 AM CSTFlash Flood WarningLCHAllen, Evangeline, Jefferson Davis, Saint Landry55 min
Dec 11, 6:28 AM CSTFlash Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis, Saint Landry3 hr
Dec 13, 9:52 PM CSTFlash Flood WarningJANMorehouse, West Carroll3 hr
Dec 14, 12:55 AM CSTFlash Flood WarningJANEast Carroll, Madison3 hr
Dec 14, 1:13 AM CSTFlash Flood WarningLCHAllen, Avoyelles, Rapides3 hr
Dec 14, 1:27 AM CSTFlash Flood WarningJANCatahoula, Concordia3 hr
Dec 14, 2:01 AM CSTFlash Flood WarningJANTensas3 hr
Dec 14, 2:54 AM CSTFlash Flood WarningLCHAllen, Calcasieu, Jefferson Davis4 hr
Dec 14, 3:05 AM CSTFlash Flood WarningJANConcordia3 hr
Dec 14, 3:35 AM CSTFlash Flood WarningLCHAllen, Avoyelles, Evangeline, Saint Landry3 hr
Dec 14, 4:25 AM CSTFlash Flood WarningLCHAcadia, Allen, Calcasieu, Evangeline, Jefferson Davis2 hr
Dec 14, 5:29 AM CSTFlash Flood WarningLIXPointe Coupee, West Feliciana7 hr
Dec 14, 6:29 AM CSTFlash Flood WarningLCHAcadia, Allen, Avoyelles, Evangeline, Jefferson Davis, Saint Landry8 hr
Dec 14, 10:37 AM CSTFlash Flood WarningJANConcordia3 hr
Dec 14, 12:10 PM CSTFlash Flood WarningLIXAscension, East Baton Rouge, Iberville, Livingston, Saint Helena, West Baton Rouge3 hr
Dec 14, 1:12 PM CSTFlash Flood WarningLIXAscension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James3 hr
Dec 14, 1:41 PM CSTFlash Flood WarningLIXLivingston, Saint Helena, Saint Tammany, Tangipahoa, Washington3 hr
Dec 14, 2:52 PM CSTFlash Flood WarningLIXSaint Tammany, Tangipahoa, Washington3 hr
Dec 14, 3:11 PM CSTFlash Flood WarningLIXSaint Charles, Saint John the Baptist2 hr
Dec 14, 4:23 PM CSTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard, Saint Charles2 hr
Dec 30, 9:34 AM CSTFlash Flood WarningLIXAscension, Lafourche, Saint Charles, Saint James, Saint John the Baptist3 hr
Dec 30, 9:46 AM CSTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard3 hr
Dec 30, 10:16 AM CSTFlash Flood WarningLIXEast Baton Rouge, Livingston, Saint John the Baptist, Saint Tammany, Tangipahoa3 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

23 more counties

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.