Alert archive / Louisiana / Tornado Warnings

Tornado Warnings in Louisiana, 2010

84 tornado warnings in 2010. 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 2010. Tap one for its archive.

Tornado Warnings
84
Busiest month
November32 tornado warnings
Busiest day
November 30, 201017 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.

20 of 84 tornado warnings covering Louisiana in 2010 had a tornado report inside them; 31 of 46 tornado reports fell inside a warning, on average 16 minutes after it went out.

Louisiana, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings842076%4667%16 min

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Jackson, MS: tornado warnings1112974%9789%32 min
NWS Shreveport, LA: tornado warnings772074%4685%19 min
NWS New Orleans, LA: tornado warnings49688%1060%17 min
NWS Lake Charles, LA: tornado warnings18667%2857%15 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 20, 2:36 PM CSTTornado WarningLCHEvangeline, Saint Landry54 min
Jan 20, 3:27 PM CSTTornado WarningLCHAvoyelles, Saint Landry29 min
Jan 20, 4:01 PM CSTTornado WarningLIXTangipahoa, Washington44 min
Jan 20, 4:41 PM CSTTornado WarningLIXWashington34 min
Jan 20, 4:48 PM CSTTornado WarningSHVSabine42 min
Jan 20, 5:14 PM CSTTornado WarningSHVCaddo46 min
Jan 20, 5:15 PM CSTTornado WarningLIXWashington30 min
Jan 20, 5:29 PM CSTTornado WarningSHVNatchitoches, Sabine46 min
Jan 20, 5:45 PM CSTTornado WarningLIXWashington29 min
Jan 20, 5:58 PM CSTTornado WarningSHVBossier, Caddo47 min
Jan 20, 6:10 PM CSTTornado WarningLIXLivingston, Saint Helena, Tangipahoa35 min
Jan 20, 6:11 PM CSTTornado WarningSHVNatchitoches, Winn34 min
Jan 20, 6:44 PM CSTTornado WarningLIXTangipahoa, Washington41 min
Jan 20, 7:03 PM CSTTornado WarningSHVJackson, Winn42 min
Jan 20, 7:41 PM CSTTornado WarningSHVCaldwell, Jackson, Ouachita, Winn34 min
Jan 20, 8:11 PM CSTTornado WarningSHVCaldwell, Ouachita34 min
Apr 8, 1:51 AM CDTTornado WarningLIXWashington39 min
Apr 24, 5:51 AM CDTTornado WarningSHVBossier, Claiborne, Webster39 min
Apr 24, 5:54 AM CDTTornado WarningLIXTangipahoa, Washington23 min
Apr 24, 6:23 AM CDTTornado WarningSHVLincoln, Union52 min
Apr 24, 7:12 AM CDTTornado WarningSHVUnion33 min
Apr 24, 8:08 AM CDTTornado WarningLIXEast Feliciana, Saint Helena37 min
Apr 24, 10:57 AM CDTTornado WarningJANEast Carroll, Franklin, Madison48 min
May 15, 7:28 AM CDTTornado WarningLIXAscension, Livingston, Saint Charles, Saint James, Saint John the Baptist32 min
May 16, 1:47 AM CDTTornado WarningLCHVermilion28 min
May 16, 6:28 AM CDTTornado WarningLIXLivingston32 min
May 16, 8:59 AM CDTTornado WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard31 min
Jun 3, 7:20 PM CDTTornado WarningLIXSaint Tammany32 min
Jun 4, 6:29 AM CDTTornado WarningLCHIberia, Saint Martin31 min
Jun 5, 2:13 PM CDTTornado WarningLIXLivingston, Saint Helena, Tangipahoa21 min
Jun 5, 2:44 PM CDTTornado WarningLIXPlaquemines31 min
Jul 6, 9:27 AM CDTTornado WarningLIXJefferson, Orleans18 min
Jul 6, 9:49 AM CDTTornado WarningLIXOrleans11 min
Jul 20, 3:25 PM CDTTornado WarningLIXJefferson20 min
Jul 25, 4:59 AM CDTTornado WarningLIXPlaquemines21 min
Jul 25, 7:15 AM CDTTornado WarningLIXWashington30 min
Aug 29, 3:08 AM CDTTornado WarningLIXJefferson, Lafourche, Saint Charles37 min
Aug 29, 4:16 AM CDTTornado WarningLIXLafourche, Saint Charles, Saint John the Baptist44 min
Sep 12, 3:45 PM CDTTornado WarningLCHVermilion31 min
Oct 19, 5:54 PM CDTTornado WarningSHVCaldwell26 min
Nov 2, 10:05 AM CDTTornado WarningLIXAssumption30 min
Nov 2, 1:08 PM CDTTornado WarningLIXJefferson, Lafourche37 min
Nov 15, 11:42 PM CSTTornado WarningLIXPlaquemines33 min
Nov 25, 11:12 PM CSTTornado WarningLCHAcadia33 min
Nov 25, 11:44 PM CSTTornado WarningLCHAcadia, Evangeline, Saint Landry31 min
Nov 26, 12:12 AM CSTTornado WarningLCHSaint Landry33 min
Nov 29, 1:30 PM CSTTornado WarningSHVNatchitoches, Winn45 min
Nov 29, 2:01 PM CSTTornado WarningSHVNatchitoches, Sabine29 min
Nov 29, 2:30 PM CSTTornado WarningSHVGrant, Natchitoches, Winn30 min
Nov 29, 2:57 PM CSTTornado WarningSHVGrant, Winn33 min
Nov 29, 3:28 PM CSTTornado WarningSHVCaldwell, Jackson, Winn32 min
Nov 29, 3:37 PM CSTTornado WarningSHVGrant, Natchitoches, Winn38 min
Nov 29, 3:59 PM CSTTornado WarningSHVCaldwell, Jackson, Ouachita21 min
Nov 29, 4:02 PM CSTTornado WarningSHVCaldwell, Jackson, Winn43 min
Nov 29, 5:50 PM CSTTornado WarningJANEast Carroll, Franklin, Madison, Richland, West Carroll40 min
Nov 29, 6:59 PM CSTTornado WarningJANFranklin, Tensas46 min
Nov 29, 7:08 PM CSTTornado WarningJANEast Carroll37 min
Nov 29, 7:33 PM CSTTornado WarningJANMadison57 min
Nov 29, 8:05 PM CSTTornado WarningJANTensas55 min
Nov 29, 8:59 PM CSTTornado WarningJANCatahoula, Concordia, Franklin, Tensas61 min
Nov 29, 9:09 PM CSTTornado WarningJANTensas66 min
Nov 29, 11:46 PM CSTTornado WarningJANConcordia44 min
Nov 30, 12:21 AM CSTTornado WarningLCHAcadia, Lafayette, Saint Landry24 min
Nov 30, 12:29 AM CSTTornado WarningLIXPointe Coupee, West Feliciana46 min
Nov 30, 12:41 AM CSTTornado WarningLCHLafayette, Saint Landry, Saint Martin49 min
Nov 30, 1:20 AM CSTTornado WarningLCHSaint Landry10 min
Nov 30, 2:32 AM CSTTornado WarningLIXEast Feliciana28 min
Nov 30, 5:36 AM CSTTornado WarningLIXSaint Tammany, Tangipahoa, Washington24 min
Nov 30, 5:41 AM CSTTornado WarningLIXWashington34 min
Nov 30, 6:06 AM CSTTornado WarningLIXSaint Tammany, Tangipahoa, Washington24 min
Nov 30, 6:19 AM CSTTornado WarningLIXWashington26 min
Nov 30, 6:30 AM CSTTornado WarningLIXSaint Tammany30 min
Dec 11, 3:52 PM CSTTornado WarningJANFranklin, Madison, Tensas53 min
Dec 11, 4:23 PM CSTTornado WarningJANMadison19 min
Dec 29, 8:50 PM CSTTornado WarningLCHIberia, Saint Martin, Vermilion40 min
Dec 29, 9:32 PM CSTTornado WarningLCHIberia, Saint Martin43 min
Dec 29, 10:26 PM CSTTornado WarningLCHIberia, Saint Martin, St. Mary19 min
Dec 31, 1:27 PM CSTTornado WarningLCHAvoyelles, Rapides33 min
Dec 31, 1:40 PM CSTTornado WarningJANCatahoula, Concordia, Franklin, Tensas65 min
Dec 31, 1:51 PM CSTTornado WarningLCHRapides24 min
Dec 31, 2:21 PM CSTTornado WarningLCHRapides24 min
Dec 31, 2:39 PM CSTTornado WarningJANFranklin, Madison, Tensas42 min
Dec 31, 3:06 PM CSTTornado WarningJANCatahoula, Concordia24 min
Dec 31, 3:51 PM CSTTornado WarningJANTensas24 min

By county

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

9 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. November 30, 201017tornado warnings
  2. January 20, 201010tornado warnings
  3. November 29, 20109tornado warnings
  4. December 31, 20107tornado warnings
  5. January 21, 20106tornado warnings
  6. April 24, 20106tornado warnings
  7. May 16, 20103tornado warnings
  8. November 26, 20103tornado warnings
  9. December 30, 20103tornado warnings
  10. June 4, 20102tornado warnings
  11. June 5, 20102tornado warnings
  12. July 6, 20102tornado warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20092011

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.