Alert archive / Louisiana / Flash Flood Warnings
Flash Flood Warnings in Louisiana, 2008
126 flash flood warnings in 2008. 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 2008. Tap one for its archive.
- Flash Flood Warnings
- 126
- Busiest month
- September69 flash flood warnings
- Busiest day
- September 3, 200822 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.
49 of 125 flash flood warnings covering Louisiana in 2008 had a flash flood report inside them; 95 of 105 flash flood reports fell inside a warning, on average 88 minutes after it went out.
Louisiana, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 125 | 49 | 61% | 105 | 90% | 88 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: flash flood warnings | 136 | 56 | 59% | 134 | 79% | 96 min |
| NWS New Orleans, LA: flash flood warnings | 30 | 8 | 73% | 17 | 76% | 48 min |
| NWS Lake Charles, LA: flash flood warnings | 47 | 12 | 74% | 26 | 85% | 86 min |
| NWS Shreveport, LA: flash flood warnings | 64 | 42 | 34% | 114 | 89% | 69 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 |
|---|---|---|---|---|
| Feb 21, 10:36 PM CST | Flash Flood Warning | SHV | Grant, LaSalle | 4 hr |
| Feb 21, 10:46 PM CST | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Tensas | 3 hr |
| Mar 30, 9:19 AM CDT | Flash Flood Warning | SHV | Sabine | 4 hr |
| Mar 30, 1:21 PM CDT | Flash Flood Warning | SHV | Sabine | 3 hr |
| Mar 30, 4:09 PM CDT | Flash Flood Warning | SHV | Sabine | 2 hr |
| Mar 30, 5:59 PM CDT | Flash Flood Warning | SHV | Natchitoches, Sabine | 3 hr |
| Mar 30, 8:49 PM CDT | Flash Flood Warning | SHV | Natchitoches, Sabine | 6 hr |
| Mar 31, 2:41 AM CDT | Flash Flood Warning | SHV | Sabine | 6 hr |
| May 2, 5:33 PM CDT | Flash Flood Warning | LIX | Livingston, Saint Tammany, Tangipahoa, Washington | 3 hr |
| May 2, 8:00 PM CDT | Flash Flood Warning | LIX | Saint Tammany, Washington | 3 hr |
| May 2, 8:26 PM CDT | Flash Flood Warning | LIX | Livingston, Tangipahoa | 2 hr |
| May 3, 6:09 AM CDT | Flash Flood Warning | LIX | Saint Tammany, Washington | 6 hr |
| May 13, 8:11 PM CDT | Flash Flood Warning | SHV | Bossier, Caddo | 3 hr |
| May 13, 9:09 PM CDT | Flash Flood Warning | SHV | Bossier | 3 hr |
| May 13, 10:07 PM CDT | Flash Flood Warning | SHV | Bossier, Caddo, De Soto, Red River | 3 hr |
| May 13, 11:15 PM CDT | Flash Flood Warning | SHV | Bienville, Jackson, Lincoln | 3 hr |
| May 14, 12:20 AM CDT | Flash Flood Warning | SHV | Caldwell, Ouachita | 3 hr |
| May 14, 5:09 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo | 10 hr |
| May 14, 7:07 AM CDT | Flash Flood Warning | SHV | De Soto, Red River | 3 hr |
| May 14, 5:40 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, Iberville, Livingston, Pointe Coupee, Tangipahoa, West Baton Rouge | 3 hr |
| May 14, 7:53 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 2 hr |
| May 14, 8:39 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, Iberville, Livingston, Pointe Coupee, Tangipahoa, West Baton Rouge | 2 hr |
| May 15, 12:40 AM CDT | Flash Flood Warning | JAN | East Carroll, Morehouse, West Carroll | 8 hr |
| May 15, 6:40 AM CDT | Flash Flood Warning | LIX | Livingston | 3 hr |
| May 15, 6:58 AM CDT | Flash Flood Warning | JAN | East Carroll | 3 hr |
| May 15, 6:59 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge | 3 hr |
| May 15, 7:09 AM CDT | Flash Flood Warning | LIX | Tangipahoa | 3 hr |
| May 15, 8:24 AM CDT | Flash Flood Warning | LIX | Ascension | 2 hr |
| May 22, 2:02 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 118 min |
| May 22, 5:01 PM CDT | Flash Flood Warning | LCH | Lafayette, Saint Landry, Saint Martin | 3 hr |
| May 22, 5:13 PM CDT | Flash Flood Warning | LIX | Pointe Coupee | 3 hr |
| May 22, 5:38 PM CDT | Flash Flood Warning | JAN | Morehouse | 94 min |
| May 22, 7:09 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 2 hr |
| May 22, 7:53 PM CDT | Flash Flood Warning | LCH | Lafayette, Saint Landry, Saint Martin | 3 hr |
| May 22, 8:58 PM CDT | Flash Flood Warning | LCH | Evangeline, Saint Landry | 3 hr |
| May 28, 11:36 AM CDT | Flash Flood Warning | JAN | Madison | 114 min |
| Jun 10, 3:02 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, Red River | 4 hr |
| Jun 15, 9:28 AM CDT | Flash Flood Warning | LIX | Jefferson, Orleans | 3 hr |
| Jun 20, 5:18 PM CDT | Flash Flood Warning | LCH | Allen, Rapides, Vernon | 117 min |
| Jul 15, 8:32 AM CDT | Flash Flood Warning | LCH | Calcasieu | 3 hr |
| Aug 1, 1:50 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 57 min |
| Aug 1, 2:12 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 59 min |
| Aug 11, 4:22 AM CDT | Flash Flood Warning | JAN | Franklin, Richland | 113 min |
| Aug 11, 4:49 AM CDT | Flash Flood Warning | SHV | Caldwell, Ouachita | 3 hr |
| Aug 11, 6:42 AM CDT | Flash Flood Warning | SHV | Caldwell, Ouachita | 3 hr |
| Aug 11, 7:16 AM CDT | Flash Flood Warning | SHV | Claiborne | 3 hr |
| Aug 11, 7:36 AM CDT | Flash Flood Warning | SHV | Claiborne, Lincoln, Ouachita, Union | 3 hr |
| Aug 11, 9:44 AM CDT | Flash Flood Warning | SHV | Ouachita | 3 hr |
| Aug 12, 2:38 AM CDT | Flash Flood Warning | JAN | East Carroll, Morehouse, West Carroll | 7 hr |
| Aug 12, 3:41 AM CDT | Flash Flood Warning | JAN | East Carroll | 2 hr |
| Aug 12, 3:55 AM CDT | Flash Flood Warning | JAN | Morehouse, West Carroll | 2 hr |
| Aug 12, 5:57 AM CDT | Flash Flood Warning | JAN | East Carroll, Morehouse, Richland, West Carroll | 4 hr |
| Aug 12, 6:54 AM CDT | Flash Flood Warning | SHV | Ouachita, Union | 4 hr |
| Aug 19, 11:12 AM CDT | Flash Flood Warning | SHV | Claiborne, Union | 3 hr |
| Aug 19, 3:10 PM CDT | Flash Flood Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 3 hr |
| Aug 19, 6:16 PM CDT | Flash Flood Warning | SHV | Caldwell, Jackson, Lincoln, Ouachita, Union, Winn | 3 hr |
| Sep 1, 3:53 PM CDT | Flash Flood Warning | LCH | Lafayette, Saint Landry, Saint Martin | 3 hr |
| Sep 1, 5:13 PM CDT | Flash Flood Warning | LIX | Plaquemines | 6 hr |
| Sep 1, 6:51 PM CDT | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Saint Landry | 3 hr |
| Sep 1, 7:12 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 3 hr |
| Sep 1, 8:05 PM CDT | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides | 3 hr |
| Sep 1, 9:03 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 3 hr |
| Sep 1, 10:26 PM CDT | Flash Flood Warning | LIX | Washington | 3 hr |
| Sep 2, 3:05 AM CDT | Flash Flood Warning | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Sep 2, 3:50 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana | 6 hr |
| Sep 2, 9:03 AM CDT | Flash Flood Warning | LIX | Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena and 1 more | 7 hr |
| Sep 2, 9:11 AM CDT | Flash Flood Warning | LCH | Iberia, Saint Martin, St. Mary, Vermilion | 2 hr |
| Sep 2, 11:21 AM CDT | Flash Flood Warning | LCH | Iberia, Lafayette, Saint Landry, Saint Martin, Vermilion | 4 hr |
| Sep 2, 12:08 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana | 4 hr |
| Sep 2, 12:42 PM CDT | Flash Flood Warning | JAN | Madison | 3 hr |
| Sep 2, 1:36 PM CDT | Flash Flood Warning | LCH | Iberia, Saint Martin, St. Mary | 114 min |
| Sep 2, 2:39 PM CDT | Flash Flood Warning | LCH | Acadia, Avoyelles, Saint Landry | 3 hr |
| Sep 2, 3:27 PM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena and 2 more | 3 hr |
| Sep 2, 3:50 PM CDT | Flash Flood Warning | LCH | Iberia, Lafayette, Saint Landry, Saint Martin | 115 min |
| Sep 2, 6:16 PM CDT | Flash Flood Warning | SHV | Caldwell, Grant, LaSalle, Ouachita | 4 hr |
| Sep 2, 7:04 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia, Franklin, Richland | 3 hr |
| Sep 2, 9:14 PM CDT | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Rapides | 3 hr |
| Sep 2, 9:52 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 113 min |
| Sep 2, 11:13 PM CDT | Flash Flood Warning | SHV | Ouachita | 3 hr |
| Sep 2, 11:18 PM CDT | Flash Flood Warning | JAN | Franklin, Tensas | 12 hr |
| Sep 2, 11:58 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 12 hr |
| Sep 3, 1:19 AM CDT | Flash Flood Warning | LIX | East Feliciana, Pointe Coupee, West Feliciana | 3 hr |
| Sep 3, 1:20 AM CDT | Flash Flood Warning | LCH | Avoyelles, Saint Landry | 3 hr |
| Sep 3, 1:51 AM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Evangeline, Rapides | 3 hr |
| Sep 3, 2:07 AM CDT | Flash Flood Warning | JAN | Richland | 6 hr |
| Sep 3, 4:27 AM CDT | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Rapides, Saint Landry, Vernon | 3 hr |
| Sep 3, 4:47 AM CDT | Flash Flood Warning | JAN | East Carroll, Madison, West Carroll | 2 hr |
| Sep 3, 6:56 AM CDT | Flash Flood Warning | JAN | East Carroll, Madison, West Carroll | 4 hr |
| Sep 3, 7:02 AM CDT | Flash Flood Warning | SHV | Grant, LaSalle | 6 hr |
| Sep 3, 7:31 AM CDT | Flash Flood Warning | LCH | Allen, Avoyelles, Evangeline, Rapides | 3 hr |
| Sep 3, 9:26 AM CDT | Flash Flood Warning | LCH | Avoyelles, Rapides | 64 min |
| Sep 3, 9:54 AM CDT | Flash Flood Warning | LCH | Acadia, Avoyelles, Evangeline, Saint Landry | 6 hr |
| Sep 3, 10:23 AM CDT | Flash Flood Warning | LCH | Acadia, Allen, Avoyelles, Beauregard, Evangeline, Jefferson Davis and 3 more | 6 hr |
| Sep 3, 10:45 AM CDT | Flash Flood Warning | LCH | Acadia, Iberia, Jefferson Davis, Lafayette, Saint Landry, Saint Martin and 1 more | 3 hr |
| Sep 3, 1:59 PM CDT | Flash Flood Warning | LCH | Acadia, Cameron, Iberia, Jefferson Davis, Lafayette, Saint Landry and 2 more | 3 hr |
| Sep 3, 6:33 PM CDT | Flash Flood Warning | JAN | East Carroll, Madison, Richland, West Carroll | 4 hr |
| Sep 3, 6:45 PM CDT | Flash Flood Warning | JAN | Catahoula | 3 hr |
| Sep 3, 8:51 PM CDT | Flash Flood Warning | JAN | Catahoula, Concordia, Madison, Tensas | 3 hr |
| Sep 4, 2:48 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 107 min |
| Sep 4, 5:02 AM CDT | Flash Flood Warning | LCH | Iberia, St. Mary | 3 hr |
| Sep 12, 1:35 PM CDT | Flash Flood Warning | LIX | Plaquemines | 6 hr |
| Sep 13, 2:20 AM CDT | Flash Flood Warning | LCH | Calcasieu | 6 hr |
| Sep 13, 5:32 AM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis, Vernon | 6 hr |
| Sep 13, 9:41 AM CDT | Flash Flood Warning | LCH | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 3 more | 3 hr |
| Sep 14, 3:22 AM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Rapides, Vernon | 5 hr |
| Sep 14, 4:37 AM CDT | Flash Flood Warning | JAN | East Carroll, West Carroll | 3 hr |
| Sep 14, 5:28 AM CDT | Flash Flood Warning | LCH | Beauregard, Calcasieu, Vernon | 3 hr |
| Sep 14, 7:13 AM CDT | Flash Flood Warning | SHV | Natchitoches, Sabine | 4 hr |
| Sep 14, 8:03 AM CDT | Flash Flood Warning | LCH | Calcasieu | 4 hr |
| Sep 14, 8:26 AM CDT | Flash Flood Warning | LCH | Beauregard | 3 hr |
| Sep 14, 8:36 AM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Evangeline, Rapides, Vernon | 3 hr |
| Sep 14, 9:11 AM CDT | Flash Flood Warning | JAN | Franklin, Richland | 109 min |
| Sep 14, 9:12 AM CDT | Flash Flood Warning | SHV | Caldwell, Grant, LaSalle, Winn | 2 hr |
| Sep 14, 9:18 AM CDT | Flash Flood Warning | LCH | Cameron | 3 hr |
| Sep 14, 9:54 AM CDT | Flash Flood Warning | JAN | East Carroll, Madison | 2 hr |
| Sep 14, 10:16 AM CDT | Flash Flood Warning | JAN | Catahoula, Concordia | 119 min |
| Sep 14, 10:21 AM CDT | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Saint Landry | 3 hr |
| Sep 14, 10:54 AM CDT | Flash Flood Warning | JAN | Tensas | 100 min |
| Sep 14, 10:56 AM CDT | Flash Flood Warning | LCH | Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry | 5 hr |
| Sep 14, 11:18 AM CDT | Flash Flood Warning | JAN | Madison | 94 min |
| Sep 14, 12:18 PM CDT | Flash Flood Warning | LCH | Cameron | 117 min |
| Sep 14, 12:41 PM CDT | Flash Flood Warning | LCH | Acadia, Lafayette, Saint Landry, Saint Martin, Vermilion | 3 hr |
| Sep 14, 2:31 PM CDT | Flash Flood Warning | LCH | Iberia, Saint Martin, St. Mary | 89 min |
| Sep 14, 3:58 PM CDT | Flash Flood Warning | LCH | Iberia, St. Mary | 92 min |
| Sep 14, 5:58 PM CDT | Flash Flood Warning | LCH | Saint Martin, St. Mary | 92 min |
| Dec 9, 4:05 PM CST | Flash Flood Warning | JAN | East Carroll, Franklin, Madison, Richland, Tensas, West Carroll | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Saint Landry Parish17
- Evangeline Parish13
- Rapides Parish13
- Saint Martin Parish12
- East Carroll Parish11
- Allen Parish11
- Avoyelles Parish11
- Ouachita Parish10
- Catahoula Parish9
- West Carroll Parish9
- Madison Parish9
- Iberia Parish9
- Concordia Parish8
- East Baton Rouge Parish8
- Iberville Parish8
- West Baton Rouge Parish8
- Lafayette Parish8
- Vernon Parish8
- Acadia Parish8
- Beauregard Parish8
- Sabine Parish7
- Livingston Parish7
- Tangipahoa Parish7
- Caldwell Parish7
- Pointe Coupee Parish7
- Richland Parish7
- Franklin Parish6
- Saint Tammany Parish6
- Calcasieu Parish6
- East Feliciana Parish6
- St. Mary Parish6
- Jefferson Davis Parish6
- Tensas Parish5
- Washington Parish5
- Bossier Parish5
- Morehouse Parish5
- Vermilion Parish5
- Cameron Parish5
- Grant Parish4
- LaSalle Parish4
20 more counties
- Caddo Parish4
- Union Parish4
- Natchitoches Parish3
- Red River Parish3
- Jackson Parish3
- Lincoln Parish3
- Plaquemines Parish3
- Claiborne Parish3
- Winn Parish3
- West Feliciana Parish3
- De Soto Parish2
- Ascension Parish2
- Lafourche Parish2
- Terrebonne Parish2
- Jefferson Parish2
- Orleans Parish2
- Saint Helena Parish2
- Bienville Parish1
- Saint Bernard Parish1
- Assumption Parish1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20072009
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.