Alert archive / Louisiana / Flash Flood Warnings

Flash Flood Warnings in Louisiana, 2014

74 flash flood warnings in 2014. 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 2014. Tap one for its archive.

Flash Flood Warnings
74
Busiest month
May25 flash flood warnings
Busiest day
May 28, 201410 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.

37 of 74 flash flood warnings covering Louisiana in 2014 had a flash flood report inside them; 84 of 103 flash flood reports fell inside a warning, on average 81 minutes after it went out.

Louisiana, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Flash flood warnings743750%10382%81 min

Each office's whole area, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Shreveport, LA: flash flood warnings141029%4881%95 min
NWS Lake Charles, LA: flash flood warnings261446%6779%75 min
NWS New Orleans, LA: flash flood warnings461274%3259%77 min
NWS Jackson, MS: flash flood warnings1216844%12490%721 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
Feb 23, 6:39 AM CSTFlash Flood WarningLIXJefferson, Plaquemines, Saint Bernard, Saint Charles111 min
Feb 23, 7:55 AM CSTFlash Flood WarningLIXJefferson, Lafourche, Plaquemines, Saint Charles, Terrebonne110 min
Feb 26, 12:12 AM CSTFlash Flood WarningLIXSaint Tammany2 hr
Mar 28, 8:36 AM CDTFlash Flood WarningLIXSaint Helena, Tangipahoa, Washington3 hr
Mar 28, 10:33 AM CDTFlash Flood WarningLIXOrleans, Saint Bernard87 min
Mar 28, 10:37 AM CDTFlash Flood WarningLIXSaint Tammany83 min
Mar 28, 12:08 PM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard112 min
Mar 28, 10:24 PM CDTFlash Flood WarningLIXWest Feliciana2 hr
Apr 4, 4:36 AM CDTFlash Flood WarningJANRichland114 min
Apr 6, 3:17 PM CDTFlash Flood WarningSHVBienville, Caldwell, Claiborne, Jackson, Lincoln, Natchitoches and 3 more4 hr
Apr 6, 4:23 PM CDTFlash Flood WarningJANEast Carroll, Franklin, Madison, Morehouse, Richland, West Carroll3 hr
Apr 6, 5:27 PM CDTFlash Flood WarningJANEast Carroll, West Carroll3 hr
Apr 6, 7:10 PM CDTFlash Flood WarningSHVBienville, Caldwell, Jackson, Lincoln, Natchitoches, Ouachita and 2 more4 hr
Apr 6, 7:25 PM CDTFlash Flood WarningJANEast Carroll, Franklin, Madison, Morehouse, Richland, Tensas and 1 more3 hr
Apr 6, 8:23 PM CDTFlash Flood WarningJANEast Carroll, West Carroll4 hr
Apr 6, 9:54 PM CDTFlash Flood WarningJANConcordia, Tensas3 hr
Apr 6, 10:28 PM CDTFlash Flood WarningJANEast Carroll, Franklin, Madison, Tensas2 hr
Apr 14, 4:09 AM CDTFlash Flood WarningJANEast Carroll7 hr
Apr 14, 12:30 PM CDTFlash Flood WarningJANEast Carroll, West Carroll3 hr
Apr 14, 2:35 PM CDTFlash Flood WarningJANMadison6 hr
Apr 14, 3:29 PM CDTFlash Flood WarningJANEast Carroll, West Carroll3 hr
May 9, 9:06 PM CDTFlash Flood WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles4 hr
May 9, 9:58 PM CDTFlash Flood WarningLIXPlaquemines, Saint Bernard3 hr
May 9, 10:51 PM CDTFlash Flood WarningLIXAscension, Assumption, Iberville, Jefferson, Lafourche, Plaquemines and 4 more3 hr
May 10, 12:01 AM CDTFlash Flood WarningLCHSaint Martin119 min
May 10, 12:59 AM CDTFlash Flood WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles2 hr
May 10, 1:09 AM CDTFlash Flood WarningLIXLivingston, Saint Helena, Tangipahoa3 hr
May 10, 1:35 AM CDTFlash Flood WarningLCHIberia, Saint Martin, St. Mary115 min
May 10, 1:41 AM CDTFlash Flood WarningLIXAscension, Assumption, Iberville, Saint James, Saint John the Baptist2 hr
May 12, 5:59 PM CDTFlash Flood WarningLCHVernon31 min
May 12, 6:49 PM CDTFlash Flood WarningLCHVernon116 min
May 28, 6:29 AM CDTFlash Flood WarningLIXSaint James, Saint John the Baptist5 hr
May 28, 6:49 AM CDTFlash Flood WarningLCHAcadia, Lafayette, Saint Landry4 hr
May 28, 7:27 AM CDTFlash Flood WarningLCHCalcasieu, Jefferson Davis4 hr
May 28, 7:57 AM CDTFlash Flood WarningLIXAssumption, Lafourche3 hr
May 28, 8:30 AM CDTFlash Flood WarningLCHIberia, Lafayette, Saint Landry, Saint Martin, Vermilion2 hr
May 28, 9:03 AM CDTFlash Flood WarningLIXAscension, Assumption, Saint James3 hr
May 28, 9:43 AM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa2 hr
May 28, 10:52 AM CDTFlash Flood WarningLCHAcadia, Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary and 1 more4 hr
May 28, 11:01 AM CDTFlash Flood WarningLCHJefferson Davis3 hr
May 28, 11:35 AM CDTFlash Flood WarningLIXAscension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James115 min
May 28, 10:05 PM CDTFlash Flood WarningLIXAssumption, Saint James3 hr
May 29, 8:49 AM CDTFlash Flood WarningLCHLafayette, Saint Landry, Saint Martin3 hr
May 29, 11:14 AM CDTFlash Flood WarningLCHLafayette, Saint Martin3 hr
May 29, 7:44 PM CDTFlash Flood WarningLIXSaint Tammany2 hr
May 30, 8:53 AM CDTFlash Flood WarningLIXAscension, Livingston, Saint James112 min
Jun 1, 1:29 PM CDTFlash Flood WarningLIXSaint Tammany3 hr
Jun 10, 2:05 AM CDTFlash Flood WarningSHVNatchitoches, Sabine4 hr
Jun 13, 9:09 AM CDTFlash Flood WarningLIXPointe Coupee, West Feliciana2 hr
Jun 27, 12:57 PM CDTFlash Flood WarningLCHCalcasieu4 hr
Jun 27, 3:26 PM CDTFlash Flood WarningLCHCalcasieu, Jefferson Davis94 min
Jul 9, 10:12 AM CDTFlash Flood WarningJANCatahoula, Concordia, Tensas2 hr
Jul 11, 3:17 PM CDTFlash Flood WarningLIXSaint Tammany88 min
Jul 11, 5:34 PM CDTFlash Flood WarningJANEast Carroll, Franklin, Madison, Morehouse, Richland, West Carroll116 min
Jul 18, 3:21 AM CDTFlash Flood WarningLCHCalcasieu, Cameron, Jefferson Davis3 hr
Jul 18, 7:53 AM CDTFlash Flood WarningLCHCalcasieu, Cameron112 min
Jul 18, 9:03 AM CDTFlash Flood WarningLCHAcadia, Iberia, Lafayette, Saint Landry, Saint Martin, Vermilion4 hr
Jul 18, 9:44 AM CDTFlash Flood WarningLCHBeauregard, Calcasieu, Cameron4 hr
Jul 18, 10:16 AM CDTFlash Flood WarningLCHIberia, Saint Martin, St. Mary4 hr
Jul 18, 1:05 PM CDTFlash Flood WarningLCHIberia, Lafayette, Saint Martin, St. Mary, Vermilion4 hr
Jul 23, 9:49 AM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard86 min
Jul 23, 8:31 PM CDTFlash Flood WarningJANRichland119 min
Aug 9, 3:34 PM CDTFlash Flood WarningJANConcordia116 min
Aug 10, 5:23 PM CDTFlash Flood WarningJANEast Carroll2 hr
Aug 11, 2:54 PM CDTFlash Flood WarningJANCatahoula, Franklin, Richland, Tensas3 hr
Aug 11, 4:06 PM CDTFlash Flood WarningJANConcordia114 min
Aug 19, 2:33 PM CDTFlash Flood WarningLCHCalcasieu117 min
Aug 30, 8:11 AM CDTFlash Flood WarningLCHAllen, Beauregard, Calcasieu, Evangeline, Jefferson Davis4 hr
Aug 30, 12:09 PM CDTFlash Flood WarningLCHAllen, Beauregard, Calcasieu, Evangeline, Jefferson Davis6 hr
Sep 5, 11:41 AM CDTFlash Flood WarningLIXSaint Bernard2 hr
Sep 5, 12:10 PM CDTFlash Flood WarningLIXWest Feliciana2 hr
Sep 5, 2:13 PM CDTFlash Flood WarningLIXLafourche, Terrebonne2 hr
Sep 5, 3:53 PM CDTFlash Flood WarningJANRichland2 hr
Sep 16, 3:54 PM CDTFlash Flood WarningLIXAscension, Assumption, Iberville, Saint James111 min

By county

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

13 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. May 28, 201410flash flood warnings
  2. May 10, 20148flash flood warnings
  3. July 18, 20146flash flood warnings
  4. April 7, 20145flash flood warnings
  5. March 28, 20144flash flood warnings
  6. April 14, 20144flash flood warnings
  7. September 5, 20144flash flood warnings
  8. April 6, 20143flash flood warnings
  9. May 29, 20143flash flood warnings
  10. February 23, 20142flash flood warnings
  11. May 12, 20142flash flood warnings
  12. May 30, 20142flash flood warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20132015

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.