Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 86, NWS New Orleans, LA

December 4, 2016Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Dec 4, 2016, 2:47 AM CST 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: Dec 4, 2016, 2:47 AM CST (08:47 UTC)
Expired: Dec 4, 2016, 3:00 AM CST
In force: 13 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.8 hours before the alert went out and 87 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 576 m²/s²
0-3 km storm-relative helicity: 811 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

958 
WFUS54 KLIX 040847
TORLIX
LAC075-040900-
/O.NEW.KLIX.TO.W.0086.161204T0847Z-161204T0900Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
247 AM CST SUN DEC 4 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

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

* UNTIL 300 AM CST
    
* AT 245 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED BETWEEN EMPIRE AND PORT SULPHUR...MOVING
  NORTHEAST AT 30 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
  CENTRAL 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.

&&

LAT...LON 2947 8977 2955 8964 2953 8962 2948 8949
      2944 8949 2933 8964
TIME...MOT...LOC 0845Z 231DEG 25KT 2945 8964 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

TD

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 4, 1:46 AM CST	Special Weather Statement	LIX	Jefferson	44 min
Dec 4, 1:56 AM CST	Special Marine Warning	LIX		49 min
Dec 4, 2:41 AM CST	Special Weather Statement	LIX	Saint Bernard	34 min
Dec 4, 2:52 AM CST	Special Marine Warning	LIX		38 min
Dec 4, 3:30 AM CST	Special Marine Warning	LIX		60 min
Dec 4, 3:38 AM CST	Special Marine Warning	LIX		52 min
Dec 4, 4:31 AM CST	Special Marine Warning	LIX		59 min
Dec 4, 5:36 AM CST	Special Marine Warning	LIX		39 min
Dec 4, 7:40 AM CST	Special Marine Warning	LIX		65 min

Nearby

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