Alert archive / Louisiana / Flash Flood Warnings
Flash Flood Warnings in Louisiana, 2013
82 flash flood warnings in 2013. 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 2013. Tap one for its archive.
- Flash Flood Warnings
- 82
- Busiest month
- January37 flash flood warnings
- Busiest day
- January 10, 201323 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.
38 of 82 flash flood warnings covering Louisiana in 2013 had a flash flood report inside them; 60 of 84 flash flood reports fell inside a warning, on average 93 minutes after it went out.
Louisiana, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 82 | 38 | 54% | 84 | 71% | 93 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: flash flood warnings | 16 | 7 | 56% | 43 | 40% | 89 min |
| NWS Jackson, MS: flash flood warnings | 146 | 75 | 49% | 140 | 92% | 74 min |
| NWS Lake Charles, LA: flash flood warnings | 32 | 19 | 41% | 49 | 78% | 112 min |
| NWS New Orleans, LA: flash flood warnings | 36 | 13 | 64% | 29 | 93% | 64 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 8, 8:55 PM CST | Flash Flood Warning | LCH | Iberia, Saint Martin, St. Mary | 3 hr |
| Jan 8, 11:55 PM CST | Flash Flood Warning | LCH | Iberia, Saint Martin, St. Mary | 2 hr |
| Jan 9, 12:36 AM CST | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston | 3 hr |
| Jan 9, 1:06 AM CST | Flash Flood Warning | LIX | Assumption, Lafourche, Saint James, Saint John the Baptist, Terrebonne | 3 hr |
| Jan 9, 3:03 AM CST | Flash Flood Warning | LCH | Iberia, St. Mary | 117 min |
| Jan 9, 3:28 AM CST | Flash Flood Warning | LIX | Livingston | 3 hr |
| Jan 9, 7:56 AM CST | Flash Flood Warning | LIX | Livingston | 109 min |
| Jan 9, 10:15 AM CST | Flash Flood Warning | LIX | Livingston | 3 hr |
| Jan 9, 1:15 PM CST | Flash Flood Warning | LCH | Acadia, Jefferson Davis, Vermilion | 6 hr |
| Jan 9, 2:14 PM CST | Flash Flood Warning | LCH | Calcasieu, Cameron, Jefferson Davis | 6 hr |
| Jan 9, 5:20 PM CST | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu, Evangeline, Saint Landry | 3 hr |
| Jan 9, 6:11 PM CST | Flash Flood Warning | LCH | Evangeline, Rapides, Vernon | 3 hr |
| Jan 9, 7:01 PM CST | Flash Flood Warning | LCH | Acadia, Cameron, Jefferson Davis, Vermilion | 3 hr |
| Jan 9, 8:34 PM CST | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Saint Landry | 3 hr |
| Jan 9, 8:58 PM CST | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Vernon | 3 hr |
| Jan 9, 9:49 PM CST | Flash Flood Warning | SHV | Caldwell, Grant, LaSalle, Natchitoches, Winn | 4 hr |
| Jan 9, 10:00 PM CST | Flash Flood Warning | LCH | Acadia, Cameron, Jefferson Davis, Lafayette, Saint Landry, Vermilion | 3 hr |
| Jan 9, 11:32 PM CST | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Saint Landry | 6 hr |
| Jan 9, 11:48 PM CST | Flash Flood Warning | JAN | Catahoula, Concordia | 3 hr |
| Jan 9, 11:51 PM CST | Flash Flood Warning | LIX | Iberville, Pointe Coupee, West Baton Rouge | 3 hr |
| Jan 9, 11:56 PM CST | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Vernon | 3 hr |
| Jan 10, 1:46 AM CST | Flash Flood Warning | SHV | Caldwell, Grant, LaSalle, Natchitoches, Winn | 4 hr |
| Jan 10, 2:46 AM CST | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Richland, Tensas | 7 hr |
| Jan 10, 2:56 AM CST | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Vernon | 3 hr |
| Jan 10, 5:34 AM CST | Flash Flood Warning | JAN | East Carroll, Franklin, Madison, Richland, Tensas | 6 hr |
| Jan 10, 5:44 AM CST | Flash Flood Warning | SHV | Caldwell, Grant, LaSalle, Natchitoches, Winn | 3 hr |
| Jan 10, 6:31 AM CST | Flash Flood Warning | JAN | Morehouse, Richland, West Carroll | 3 hr |
| Jan 10, 8:17 AM CST | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Livingston, Saint James and 1 more | 5 hr |
| Jan 10, 8:54 AM CST | Flash Flood Warning | LIX | Assumption, Lafourche, Terrebonne | 4 hr |
| Jan 10, 9:14 AM CST | Flash Flood Warning | JAN | Morehouse, Richland, West Carroll | 3 hr |
| Jan 10, 9:46 AM CST | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Tensas | 3 hr |
| Jan 10, 10:50 AM CST | Flash Flood Warning | LIX | Lafourche, Saint Charles, Saint John the Baptist | 115 min |
| Jan 10, 11:29 AM CST | Flash Flood Warning | JAN | East Carroll, Franklin, Madison, Tensas | 2 hr |
| Jan 10, 11:36 AM CST | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Rapides, Saint Landry | 9 min |
| Jan 13, 10:26 AM CST | Flash Flood Warning | JAN | East Carroll, Morehouse, Richland, West Carroll | 5 hr |
| Jan 13, 11:51 AM CST | Flash Flood Warning | JAN | Franklin, Madison, Richland, Tensas | 4 hr |
| Jan 13, 12:22 PM CST | Flash Flood Warning | JAN | Catahoula, Concordia | 3 hr |
| Feb 10, 11:19 AM CST | Flash Flood Warning | JAN | Franklin, Madison, Tensas | 116 min |
| Feb 25, 4:15 AM CST | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Apr 11, 9:28 AM CDT | Flash Flood Warning | JAN | West Carroll | 2 hr |
| Apr 14, 4:55 AM CDT | Flash Flood Warning | LIX | East Feliciana, Pointe Coupee, West Feliciana | 3 hr |
| Apr 14, 7:16 AM CDT | Flash Flood Warning | LIX | Lafourche, Saint Charles, Saint James, Saint John the Baptist | 3 hr |
| Apr 28, 3:15 PM CDT | Flash Flood Warning | LIX | Livingston | 90 min |
| May 1, 12:30 PM CDT | Flash Flood Warning | LIX | Jefferson | 2 hr |
| May 1, 3:45 PM CDT | Flash Flood Warning | JAN | Franklin, Madison, Morehouse, Richland, Tensas | 3 hr |
| May 1, 6:38 PM CDT | Flash Flood Warning | LIX | East Feliciana, West Feliciana | 112 min |
| May 2, 3:09 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans | 111 min |
| May 10, 3:02 PM CDT | Flash Flood Warning | LIX | Assumption, Lafourche, Saint James, Saint John the Baptist, Terrebonne | 118 min |
| May 10, 5:01 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 59 min |
| May 22, 4:23 AM CDT | Flash Flood Warning | LIX | East Feliciana, West Feliciana | 3 hr |
| May 22, 5:50 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, Tangipahoa, West Baton Rouge | 115 min |
| May 22, 8:38 AM CDT | Flash Flood Warning | LIX | Assumption, Saint James | 112 min |
| Jun 1, 10:26 PM CDT | Flash Flood Warning | SHV | Claiborne, Lincoln, Ouachita, Union | 4 hr |
| Jun 1, 10:44 PM CDT | Flash Flood Warning | SHV | Jackson, Ouachita | 4 hr |
| Jun 2, 2:27 AM CDT | Flash Flood Warning | JAN | Madison | 3 hr |
| Jun 2, 4:49 AM CDT | Flash Flood Warning | JAN | Franklin, Madison, Tensas | 116 min |
| Jun 5, 11:47 PM CDT | Flash Flood Warning | JAN | Franklin, Madison, Tensas | 2 hr |
| Jun 6, 2:08 AM CDT | Flash Flood Warning | SHV | Ouachita | 3 hr |
| Jun 6, 2:11 AM CDT | Flash Flood Warning | JAN | Franklin, Madison, Tensas | 2 hr |
| Jun 6, 6:23 AM CDT | Flash Flood Warning | SHV | Bienville, Grant, Natchitoches, Red River, Winn | 3 hr |
| Jun 6, 4:40 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Jun 9, 5:59 PM CDT | Flash Flood Warning | JAN | Concordia, Tensas | 91 min |
| Jul 11, 1:44 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Jul 11, 2:59 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 3 hr |
| Jul 14, 2:01 PM CDT | Flash Flood Warning | JAN | Tensas | 119 min |
| Jul 18, 6:14 PM CDT | Flash Flood Warning | LIX | Jefferson | 3 hr |
| Jul 24, 3:19 PM CDT | Flash Flood Warning | JAN | Madison | 116 min |
| Aug 14, 8:08 AM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 2 hr |
| Sep 20, 2:34 PM CDT | Flash Flood Warning | SHV | Bossier, Caddo | 116 min |
| Sep 20, 10:35 PM CDT | Flash Flood Warning | LCH | Allen, Calcasieu, Jefferson Davis | 3 hr |
| Sep 20, 10:47 PM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu | 3 hr |
| Sep 20, 11:59 PM CDT | Flash Flood Warning | LCH | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 2 more | 3 hr |
| Sep 21, 3:09 AM CDT | Flash Flood Warning | LCH | Acadia, Allen, Beauregard, Calcasieu, Evangeline, Jefferson Davis | 6 hr |
| Sep 30, 12:14 PM CDT | Flash Flood Warning | LCH | Beauregard | 106 min |
| Oct 6, 12:13 AM CDT | Flash Flood Warning | JAN | East Carroll, West Carroll | 2 hr |
| Oct 6, 2:14 AM CDT | Flash Flood Warning | JAN | East Carroll, West Carroll | 2 hr |
| Oct 31, 8:13 AM CDT | Flash Flood Warning | LCH | Beauregard, Rapides, Vernon | 6 hr |
| Oct 31, 8:50 AM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Sabine, Winn | 3 hr |
| Oct 31, 9:18 AM CDT | Flash Flood Warning | JAN | Franklin, Morehouse, Richland, West Carroll | 6 hr |
| Oct 31, 9:47 AM CDT | Flash Flood Warning | LCH | Beauregard, Calcasieu, Vernon | 4 hr |
| Oct 31, 11:45 AM CDT | Flash Flood Warning | JAN | East Carroll, Madison | 6 hr |
| Oct 31, 12:26 PM CDT | Flash Flood Warning | LCH | Allen, Avoyelles, Beauregard, Evangeline, Rapides, Saint Landry and 1 more | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Tensas Parish12
- Evangeline Parish11
- Franklin Parish11
- Madison Parish11
- Allen Parish9
- Beauregard Parish8
- Richland Parish8
- Livingston Parish7
- Lafourche Parish7
- Jefferson Davis Parish7
- Calcasieu Parish7
- Saint Landry Parish7
- Rapides Parish7
- Vernon Parish7
- Avoyelles Parish7
- West Carroll Parish7
- Concordia Parish6
- East Carroll Parish6
- Assumption Parish5
- Saint James Parish5
- Saint John the Baptist Parish5
- Acadia Parish5
- Grant Parish5
- Natchitoches Parish5
- Winn Parish5
- Catahoula Parish5
- Morehouse Parish5
- Iberville Parish4
- Terrebonne Parish4
- Cameron Parish4
- Jefferson Parish4
- Iberia Parish3
- St. Mary Parish3
- Ascension Parish3
- Vermilion Parish3
- Caldwell Parish3
- LaSalle Parish3
- Saint Tammany Parish3
- East Feliciana Parish3
- West Feliciana Parish3
20 more counties
- Ouachita Parish3
- Saint Martin Parish2
- East Baton Rouge Parish2
- Pointe Coupee Parish2
- West Baton Rouge Parish2
- Saint Charles Parish2
- Orleans Parish2
- Lafayette Parish1
- Tangipahoa Parish1
- Claiborne Parish1
- Lincoln Parish1
- Union Parish1
- Jackson Parish1
- Bienville Parish1
- Red River Parish1
- Plaquemines Parish1
- Saint Bernard Parish1
- Bossier Parish1
- Caddo Parish1
- Sabine Parish1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.