Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 81, NWS New Orleans, LA

August 4, 2016Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Aug 4, 2016, 4:47 PM CDT for Plaquemines Parish, Louisiana. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 4, 2016, 4:47 PM CDT (21:47 UTC)
Expired
Aug 4, 2016, 5:00 PM CDT
In force
13 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.8 hours before the alert went out and 63 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 2016-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2716 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2016-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
2716 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

086 
WFUS54 KLIX 042147
TORLIX
LAC075-042200-
/O.NEW.KLIX.TO.W.0081.160804T2147Z-160804T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
447 PM CDT THU AUG 4 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN PLAQUEMINES PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 500 PM CDT
    
* AT 447 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES NORTH OF POINTE A LA HACHE...OR 14
  MILES NORTHWEST OF PORT SULPHUR...MOVING SOUTH AT 20 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHWESTERN PLAQUEMINES PARISH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR 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.

THIS CLUSTER OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A BUILDING.

&&

LAT...LON 2973 8984 2972 8977 2964 8970 2965 8989
TIME...MOT...LOC 2147Z 009DEG 16KT 2969 8981 

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

$$

24/RR
1 follow-up statement
745 
WWUS54 KLIX 042155
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
455 PM CDT THU AUG 4 2016

LAC075-042205-
/O.EXP.KLIX.TO.W.0081.000000T0000Z-160804T2200Z/
PLAQUEMINES LA-
455 PM CDT THU AUG 4 2016

...THE TORNADO WARNING FOR NORTHWESTERN PLAQUEMINES PARISH WILL
EXPIRE AT 500 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 2973 8984 2972 8977 2964 8970 2965 8989
TIME...MOT...LOC 2153Z 009DEG 16KT 2969 8981 

$$

24/RR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 10:39 AM CDTHeat AdvisoryLIXAssumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more8 hr
Aug 4, 1:22 PM CDTSpecial Marine WarningLIX23 min
Aug 4, 1:48 PM CDTSpecial Marine WarningLIX87 min
Aug 4, 1:52 PM CDTSpecial Marine WarningLIX83 min
Aug 4, 2:32 PM CDTSpecial Weather StatementLIXSaint Tammany, Tangipahoa28 min
Aug 4, 2:57 PM CDTSpecial Marine WarningLIX93 min
Aug 4, 3:06 PM CDTAreal Flood AdvisoryLIXSaint Tammany114 min
Aug 4, 3:15 PM CDTSevere Thunderstorm WarningLIXSaint Tammany30 min
Aug 4, 3:26 PM CDTSevere Thunderstorm WarningLIXAscension, Livingston, Saint John the Baptist, Saint Tammany, Tangipahoa64 min
Aug 4, 3:28 PM CDTSpecial Weather StatementLIXOrleans47 min
Aug 4, 3:33 PM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard3 hr
Aug 4, 3:33 PM CDTSpecial Marine WarningLIX87 min
Aug 4, 3:34 PM CDTSpecial Marine WarningLIX86 min
Aug 4, 3:35 PM CDTFlash Flood WarningLIXSaint Tammany3 hr
Aug 4, 3:35 PM CDTSevere Thunderstorm WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard55 min
Aug 4, 3:47 PM CDTSpecial Marine WarningLIX58 min
Aug 4, 4:09 PM CDTSevere Thunderstorm WarningLIXSaint Charles, Saint James, Saint John the Baptist66 min
Aug 4, 4:12 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge26 min
Aug 4, 4:22 PM CDTSevere Thunderstorm WarningLIXJefferson, Saint Charles23 min
Aug 4, 4:35 PM CDTSpecial Weather StatementLIXOrleans40 min
Aug 4, 4:51 PM CDTSpecial Weather StatementLIXAssumption, Jefferson, Lafourche, Saint James54 min
Aug 4, 4:54 PM CDTSpecial Weather StatementLIXSaint Charles36 min
Aug 4, 5:22 PM CDTSpecial Weather StatementLIXLafourche23 min
Aug 4, 5:34 PM CDTSpecial Weather StatementLIXLivingston26 min
Aug 4, 5:48 PM CDTSpecial Weather StatementLIXLafourche27 min
Aug 4, 6:07 PM CDTSpecial Weather StatementLIXEast Baton Rouge23 min
Aug 4, 6:15 PM CDTSpecial Weather StatementLIXTerrebonne30 min
Aug 4, 6:37 PM CDTSpecial Weather StatementLIXEast Baton Rouge, West Baton Rouge23 min

Nearby

Tornado Warnings in Louisiana, 2016Every tornado warning in 2016Tornadoes in 2016

Sources

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