Alert archive / Louisiana / Tornado Warnings

Tornado Warnings in Louisiana, 2015

108 tornado warnings in 2015. 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 tornado warnings reaches back to 1986.

Tornado Warnings by county

Each county as a circle sized by its count in 2015. Tap one for its archive.

Tornado Warnings
108
Busiest month
April28 tornado warnings
Busiest day
December 28, 201518 tornado warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

14 of 108 tornado warnings covering Louisiana in 2015 had a tornado report inside them; 17 of 40 tornado reports fell inside a warning, on average 9 minutes after it went out.

Louisiana, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings1081487%4043%9 min

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Shreveport, LA: tornado warnings1032081%4255%11 min
NWS New Orleans, LA: tornado warnings70987%3043%7 min
NWS Jackson, MS: tornado warnings531866%6781%17 min
NWS Lake Charles, LA: tornado warnings29486%1040%12 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 3, 4:19 AM CSTTornado WarningSHVNatchitoches26 min
Mar 12, 11:19 PM CDTTornado WarningLIXLafourche, Terrebonne26 min
Apr 9, 7:31 PM CDTTornado WarningLIXSaint Helena, Tangipahoa29 min
Apr 13, 9:25 AM CDTTornado WarningLIXPlaquemines35 min
Apr 13, 9:59 AM CDTTornado WarningLIXPlaquemines31 min
Apr 15, 3:48 PM CDTTornado WarningLIXSaint Charles, Saint John the Baptist27 min
Apr 15, 4:53 PM CDTTornado WarningLIXOrleans, Saint Bernard37 min
Apr 19, 6:17 PM CDTTornado WarningSHVCaddo, De Soto, Red River28 min
Apr 19, 6:47 PM CDTTornado WarningSHVBossier, Webster39 min
Apr 19, 8:11 PM CDTTornado WarningLCHRapides34 min
Apr 19, 8:43 PM CDTTornado WarningLCHAvoyelles, Rapides19 min
Apr 19, 9:36 PM CDTTornado WarningLCHRapides24 min
Apr 24, 12:18 PM CDTTornado WarningLCHBeauregard, Calcasieu27 min
Apr 24, 12:45 PM CDTTornado WarningLCHAllen, Beauregard, Calcasieu, Jefferson Davis30 min
Apr 24, 10:45 PM CDTTornado WarningSHVClaiborne, Union30 min
Apr 24, 11:32 PM CDTTornado WarningJANMorehouse47 min
Apr 24, 11:46 PM CDTTornado WarningJANMorehouse34 min
Apr 25, 12:09 AM CDTTornado WarningJANEast Carroll, West Carroll66 min
Apr 27, 6:15 AM CDTTornado WarningLCHBeauregard15 min
Apr 27, 7:07 AM CDTTornado WarningLCHVernon23 min
Apr 27, 8:36 AM CDTTornado WarningLIXPointe Coupee, West Feliciana24 min
Apr 27, 8:48 AM CDTTornado WarningLIXEast Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge, West Feliciana27 min
Apr 27, 9:07 AM CDTTornado WarningLIXEast Baton Rouge, Livingston, West Baton Rouge38 min
Apr 27, 9:28 AM CDTTornado WarningLIXAscension, East Baton Rouge, Livingston32 min
Apr 27, 9:32 AM CDTTornado WarningLIXAssumption, Lafourche, Saint Charles, Saint James, Saint John the Baptist28 min
Apr 27, 9:53 AM CDTTornado WarningLIXLivingston, Tangipahoa37 min
Apr 27, 9:59 AM CDTTornado WarningLIXJefferson, Lafourche, Saint Charles, Saint John the Baptist31 min
Apr 27, 10:24 AM CDTTornado WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles36 min
Apr 27, 10:32 AM CDTTornado WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard28 min
Apr 27, 10:56 AM CDTTornado WarningLIXOrleans, Plaquemines, Saint Bernard34 min
May 11, 2:13 PM CDTTornado WarningLIXLivingston, Tangipahoa32 min
May 17, 3:42 AM CDTTornado WarningLIXLivingston, Saint Helena, Tangipahoa33 min
May 17, 4:18 AM CDTTornado WarningLIXSaint Helena, Tangipahoa27 min
May 17, 4:34 AM CDTTornado WarningLIXTangipahoa26 min
May 24, 12:31 PM CDTTornado WarningSHVCaddo7 min
May 25, 7:07 PM CDTTornado WarningSHVBienville, Jackson, Natchitoches, Winn38 min
May 25, 7:36 PM CDTTornado WarningSHVCaddo, De Soto39 min
May 25, 8:10 PM CDTTornado WarningSHVBossier, Caddo, De Soto44 min
May 25, 8:33 PM CDTTornado WarningSHVBienville, Bossier, Caddo, Webster42 min
May 25, 9:05 PM CDTTornado WarningSHVNatchitoches, Red River, Winn40 min
May 25, 9:52 PM CDTTornado WarningLCHBeauregard23 min
May 26, 1:11 AM CDTTornado WarningLIXJefferson34 min
Jun 17, 5:46 PM CDTTornado WarningLCHBeauregard29 min
Jun 18, 4:29 AM CDTTornado WarningSHVDe Soto, Sabine46 min
Jun 18, 5:13 AM CDTTornado WarningSHVDe Soto47 min
Jun 18, 5:37 AM CDTTornado WarningSHVBossier, Caddo, De Soto, Red River38 min
Jun 18, 6:12 AM CDTTornado WarningSHVBossier, Webster24 min
Jun 18, 6:45 AM CDTTornado WarningSHVBienville, Bossier, Caddo, De Soto, Red River, Webster3 min
Jun 18, 6:47 AM CDTTornado WarningSHVBossier, Caddo, De Soto15 min
Jun 18, 6:50 AM CDTTornado WarningSHVBienville, Bossier, Caddo, De Soto29 min
Jun 18, 7:57 AM CDTTornado WarningSHVClaiborne, Webster22 min
Jun 27, 3:47 PM CDTTornado WarningLCHCameron17 min
Sep 27, 10:04 AM CDTTornado WarningLIXPlaquemines, Saint Bernard26 min
Sep 27, 11:16 AM CDTTornado WarningLIXPlaquemines, Saint Bernard29 min
Sep 27, 11:45 AM CDTTornado WarningLIXPlaquemines, Saint Bernard30 min
Oct 25, 11:08 AM CDTTornado WarningLIXSaint John the Baptist22 min
Oct 25, 6:24 PM CDTTornado WarningLIXTerrebonne36 min
Oct 25, 6:51 PM CDTTornado WarningLIXLafourche39 min
Oct 25, 7:21 PM CDTTornado WarningLIXLafourche, Saint Charles39 min
Oct 25, 7:51 PM CDTTornado WarningLIXTangipahoa24 min
Oct 25, 8:44 PM CDTTornado WarningLIXLafourche, Terrebonne31 min
Oct 25, 9:44 PM CDTTornado WarningLIXJefferson, Saint Charles31 min
Oct 31, 6:43 AM CDTTornado WarningLCHBeauregard, Vernon32 min
Oct 31, 7:28 AM CDTTornado WarningLCHBeauregard, Vernon17 min
Oct 31, 8:46 AM CDTTornado WarningLCHRapides, Vernon44 min
Oct 31, 8:47 AM CDTTornado WarningLCHBeauregard28 min
Oct 31, 9:11 AM CDTTornado WarningLCHVernon49 min
Oct 31, 10:28 AM CDTTornado Warning Tornado observedLCHRapides22 min
Oct 31, 11:48 AM CDTTornado WarningJANCatahoula, Concordia27 min
Oct 31, 12:28 PM CDTTornado WarningLIXAscension, Livingston32 min
Oct 31, 12:39 PM CDTTornado WarningLIXPointe Coupee36 min
Oct 31, 1:21 PM CDTTornado WarningLIXLivingston24 min
Oct 31, 1:33 PM CDTTornado WarningLIXTangipahoa42 min
Oct 31, 1:35 PM CDTTornado WarningLIXSaint Tammany, Washington40 min
Oct 31, 1:55 PM CDTTornado Warning Tornado observedLIXTangipahoa35 min
Oct 31, 2:03 PM CDTTornado WarningLIXEast Baton Rouge, Livingston, Saint Helena27 min
Oct 31, 2:22 PM CDTTornado WarningLIXSaint Helena23 min
Oct 31, 3:05 PM CDTTornado WarningLIXTangipahoa25 min
Oct 31, 3:29 PM CDTTornado WarningLIXSaint Tammany, Washington31 min
Nov 17, 2:26 PM CSTTornado WarningLCHAllen, Beauregard, Vernon34 min
Nov 17, 11:13 PM CSTTornado WarningLIXSaint Helena, Tangipahoa31 min
Nov 18, 1:34 AM CSTTornado WarningLIXWashington26 min
Nov 18, 2:13 AM CSTTornado WarningLIXOrleans, Plaquemines, Saint Bernard62 min
Dec 21, 4:56 PM CSTTornado WarningLCHRapides, Vernon34 min
Dec 21, 5:29 PM CSTTornado WarningLCHRapides31 min
Dec 21, 6:33 PM CSTTornado WarningLCHAvoyelles, Rapides42 min
Dec 23, 2:24 AM CSTTornado WarningLIXJefferson, Lafourche51 min
Dec 23, 3:20 AM CSTTornado WarningLIXPlaquemines, Saint Bernard25 min
Dec 27, 3:40 PM CSTTornado WarningSHVUnion35 min
Dec 27, 4:10 PM CSTTornado WarningSHVUnion35 min
Dec 27, 7:14 PM CSTTornado WarningSHVBienville, Red River31 min
Dec 27, 7:32 PM CSTTornado WarningSHVBossier43 min
Dec 27, 8:09 PM CSTTornado WarningSHVCaddo51 min
Dec 27, 8:19 PM CSTTornado WarningSHVBossier, Caddo26 min
Dec 27, 8:48 PM CSTTornado WarningSHVBossier, Caddo42 min
Dec 27, 10:52 PM CSTTornado WarningSHVBienville, Claiborne, Webster53 min
Dec 28, 12:05 AM CSTTornado WarningSHVBienville, Jackson, Lincoln25 min
Dec 28, 1:35 AM CSTTornado WarningLIXEast Feliciana25 min
Dec 28, 1:51 AM CSTTornado WarningLIXIberville24 min
Dec 28, 2:17 AM CSTTornado WarningLIXAscension, East Baton Rouge, Iberville, Livingston28 min
Dec 28, 2:28 AM CSTTornado WarningLIXLivingston, Saint Helena47 min
Dec 28, 2:41 AM CSTTornado WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena49 min
Dec 28, 2:53 AM CSTTornado WarningLIXLivingston, Saint Helena, Tangipahoa67 min
Dec 28, 3:28 AM CSTTornado WarningLIXSaint John the Baptist, Tangipahoa32 min
Dec 28, 3:33 AM CSTTornado WarningLIXSaint Tammany, Tangipahoa, Washington27 min
Dec 28, 4:00 AM CSTTornado WarningLIXSaint Tammany, Washington30 min
Dec 28, 4:28 AM CSTTornado WarningLIXSaint Tammany32 min
Dec 28, 4:35 AM CSTTornado WarningLIXWashington25 min

By county

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

8 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 28, 201518tornado warnings
  2. October 31, 201517tornado warnings
  3. April 27, 201512tornado warnings
  4. June 18, 20158tornado warnings
  5. May 26, 20157tornado warnings
  6. April 25, 20154tornado warnings
  7. October 26, 20154tornado warnings
  8. April 20, 20153tornado warnings
  9. May 17, 20153tornado warnings
  10. September 27, 20153tornado warnings
  11. October 25, 20153tornado warnings
  12. November 18, 20153tornado warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20142016

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.