Alert archive / Louisiana / Tornado Warnings in 2018

Tornado Warning 10, NWS New Orleans, LA

April 14, 2018Saint Helena Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 14, 2018, 8:03 AM CDT for Saint Helena Parish, Tangipahoa Parish, Louisiana. It was in force for 42 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 14, 2018, 8:03 AM CDT (13:03 UTC)
Expired
Apr 14, 2018, 8:45 AM CDT
In force
42 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Saint Helena Parish, LA, Tangipahoa Parish, LA

What was reported inside it

TimeReportWhereRemark
Apr 14, 8:25 AM CDTTSTM WND DMGGreensburg, LATREES DOWN SOUTH OF GREENSBURG ALONG HWY 43. ALSO ALONG HWY 1045 NEAR THE TANGIPAHOA RIVER. TIME ESTIMATED FROM RADAR.
Apr 14, 8:35 AM CDTTORNADO 04 N Amite, LASURVEY DETERMINED A TRACK STARTING IN ST HELENA PARISH AT THE INTERSECTION OF LA 441 AND LA 1048, PROCEEDING EAST ALONG LA 1048 INTO TANGIPAHOA PARISH, LIFTING NEAR U.S. HIGHWAY 51 AT ARCOLA. LARGE PINES AND OAKS UPROOTED. MOST TREES DOWN NOTED ALONG ARCOLA RO
Apr 14, 8:40 AM CDTTSTM WND DMG5 N Amite, LAEM ESTIMATED OVER 100 TREES DOWN AROUND ARCOLA ALONG WITH MINOR SHINGLE DAMAGE. POSSIBLE TORNADO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 14, 6:57 AM CDTTornado WatchSPC7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.1 hours before the alert went out and 109 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2018-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1802 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2018-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 222 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1802 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
534 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
222 m²/s²
0-3 km storm-relative helicity
293 m²/s²
Significant tornado parameter
1.6
Supercell composite
12.6

Open this sounding in Storm Lab

The text

As transmitted.

707 
WFUS54 KLIX 141303
TORLIX
LAC091-105-141345-
/O.NEW.KLIX.TO.W.0010.180414T1303Z-180414T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
803 AM CDT SAT APR 14 2018

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Northern St. Helena Parish in southeastern Louisiana...
  Northwestern Tangipahoa Parish in southeastern Louisiana...

* Until 845 AM CDT.
    
* At 802 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Darlington, or near Greensburg, moving east at 35
  mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Greensburg and Easleyville around 810 AM CDT.
  Kentwood around 830 AM CDT.
  Wilmer around 840 AM CDT.

Other locations impacted by this tornadic thunderstorm include
Tangipahoa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3100 9036 3078 9034 3080 9084 3095 9084
TIME...MOT...LOC 1302Z 266DEG 32KT 3087 9077 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CAB

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 4:24 AM CDTGale WarningLIX26 hr
Apr 14, 4:24 AM CDTSmall Craft AdvisoryLIX54 hr
Apr 14, 4:24 AM CDTWind AdvisoryLIXSaint Bernard, Saint John the Baptist12 hr
Apr 14, 6:18 AM CDTSpecial Weather StatementLIXPointe Coupee, West Feliciana27 min
Apr 14, 6:30 AM CDTTornado WarningLIXPointe Coupee15 min
Apr 14, 6:36 AM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana54 min
Apr 14, 6:58 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more62 min
Apr 14, 7:31 AM CDTTornado WarningLIXEast Feliciana, Saint Helena44 min
Apr 14, 7:55 AM CDTSevere Thunderstorm WarningLIXEast Feliciana, Saint Helena, Tangipahoa50 min
Apr 14, 7:57 AM CDTTornado WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena, West Baton Rouge48 min
Apr 14, 8:01 AM CDTSevere Thunderstorm WarningLIXAscension, Assumption, East Baton Rouge, Iberville, Lafourche, Livingston and 3 more59 min
Apr 14, 8:18 AM CDTTornado WarningLIXAscension, East Baton Rouge, Livingston, Tangipahoa42 min
Apr 14, 8:22 AM CDTTornado WarningLIXSaint Helena, Tangipahoa38 min
Apr 14, 8:30 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, Livingston, Saint Helena, Tangipahoa, Washington45 min
Apr 14, 8:45 AM CDTSevere Thunderstorm WarningLIXLivingston, Saint Helena, Saint Tammany, Tangipahoa, Washington45 min
Apr 14, 8:49 AM CDTTornado WarningLIXSaint Tammany, Tangipahoa, Washington41 min
Apr 14, 8:55 AM CDTTornado WarningLIXTangipahoa, Washington35 min
Apr 14, 9:00 AM CDTSevere Thunderstorm WarningLIXAscension, Assumption, Lafourche, Livingston, Saint Charles, Saint James and 3 more45 min
Apr 14, 9:03 AM CDTSpecial Marine WarningLIX42 min
Apr 14, 9:22 AM CDTSevere Thunderstorm WarningLIXAssumption, Lafourche, Terrebonne38 min
Apr 14, 9:27 AM CDTTornado WarningLIXAssumption, Lafourche, Saint James33 min
Apr 14, 9:30 AM CDTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington45 min
Apr 14, 9:42 AM CDTSpecial Marine WarningLIX93 min
Apr 14, 9:44 AM CDTSevere Thunderstorm WarningLIXAssumption, Lafourche, Livingston, Saint Charles, Saint James, Saint John the Baptist and 1 more46 min
Apr 14, 9:51 AM CDTAreal Flood AdvisoryLIXAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Lafourche and 8 more3 hr
Apr 14, 10:14 AM CDTAreal Flood AdvisoryLIXSaint John the Baptist, Saint Tammany, Tangipahoa, Washington3 hr
Apr 14, 10:17 AM CDTAreal Flood AdvisoryLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 3 more3 hr
Apr 14, 10:21 AM CDTSpecial Weather StatementLIXSaint Tammany84 min
Apr 14, 10:26 AM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Orleans, Saint Charles, Saint John the Baptist, Terrebonne49 min
Apr 14, 10:34 AM CDTSpecial Marine WarningLIX86 min
Apr 14, 10:52 AM CDTTornado Warning Tornado observedLIXSaint Tammany12 min
Apr 14, 11:11 AM CDTSpecial Marine WarningLIX94 min
Apr 14, 11:16 AM CDTSpecial Weather StatementLIXLafourche, Orleans, Terrebonne44 min
Apr 14, 11:37 AM CDTSevere Thunderstorm WarningLIXSaint Tammany22 min
Apr 14, 12:04 PM CDTSpecial Weather StatementLIXOrleans41 min
Apr 14, 12:11 PM CDTFlash Flood WarningLIXSaint Tammany3 hr
Apr 14, 12:13 PM CDTFlash Flood WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more3 hr
Apr 14, 12:28 PM CDTSpecial Marine WarningLIX92 min
Apr 14, 12:37 PM CDTSpecial Marine WarningLIX38 min
Apr 14, 12:54 PM CDTSpecial Marine WarningLIX96 min
Apr 14, 1:05 PM CDTSpecial Weather StatementLIXPlaquemines85 min
Apr 14, 2:26 PM CDTSpecial Marine WarningLIX2 hr
Apr 14, 2:39 PM CDTSpecial Weather StatementLIXSaint Bernard51 min
Apr 14, 3:16 PM CDTAreal Flood AdvisoryLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more3 hr
Apr 14, 4:27 PM CDTSpecial Weather StatementLIXOrleans63 min
Apr 14, 4:33 PM CDTSpecial Marine WarningLIX87 min
Apr 14, 5:32 PM CDTSpecial Marine WarningLIX88 min
Apr 14, 5:35 PM CDTSpecial Marine WarningLIX115 min

Nearby

Tornado Warnings in Louisiana, 2018Every tornado warning in 2018Tornadoes in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.