Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 162, NWS New Orleans, LA

November 16, 2011Washington Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Nov 16, 2011, 4:09 AM CST for Washington Parish, Louisiana. It was in force for 36 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: Nov 16, 2011, 4:09 AM CST (10:09 UTC)
Expired: Nov 16, 2011, 4:45 AM CST
In force: 36 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Washington Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Nov 16, 2:20 AM CST	Tornado Watch	SPC	8 hr
Nov 16, 2:49 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.2 hours before the alert went out and 86 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: 1734 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 661 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

780 
WFUS54 KLIX 161009
TORLIX
LAC117-161045-
/O.NEW.KLIX.TO.W.0162.111116T1009Z-111116T1045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
409 AM CST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN WASHINGTON PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF FRANKLINTON...

* UNTIL 445 AM CST

* AT 405 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES WEST OF
  FRANKLINTON...MOVING NORTHEAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  8 MILES NORTH OF FRANKLINTON BY 420 AM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM CST WEDNESDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3100 8988 3074 9026 3082 9030 3084 9029
      3087 9032 3088 9031 3090 9033 3100 9025
TIME...MOT...LOC 1008Z 230DEG 33KT 3085 9029

$$


24/RR

1 follow-up statement

244 
WWUS54 KLIX 161042
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
442 AM CST WED NOV 16 2011

LAC117-161052-
/O.EXP.KLIX.TO.W.0162.000000T0000Z-111116T1045Z/
WASHINGTON LA-
442 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR NORTHWESTERN WASHINGTON PARISH WILL EXPIRE
AT 445 AM CST...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM CST WEDNESDAY MORNING
FOR SOUTHEASTERN LOUISIANA. 

LAT...LON 3100 8988 3074 9026 3082 9030 3084 9029
      3087 9032 3088 9031 3090 9033 3100 9025
TIME...MOT...LOC 1042Z 230DEG 33KT 3103 8998

$$


24/RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 2:28 AM CST	Tornado Warning	LIX	Saint Helena, Tangipahoa	47 min
Nov 16, 2:38 AM CST	Special Marine Warning	LIX		52 min
Nov 16, 3:33 AM CST	Tornado Warning	LIX	Livingston, Saint Helena, Tangipahoa	42 min
Nov 16, 4:18 AM CST	Tornado Warning	LIX	Jefferson, Saint Charles	42 min
Nov 16, 4:52 AM CST	Tornado Warning	LIX	Lafourche, Terrebonne	23 min
Nov 16, 4:53 AM CST	Tornado Warning	LIX	Jefferson, Orleans, Saint Charles	37 min
Nov 16, 4:57 AM CST	Special Marine Warning	LIX		48 min
Nov 16, 5:21 AM CST	Tornado Warning	LIX	Lafourche, Saint Charles	39 min
Nov 16, 5:37 AM CST	Special Marine Warning	LIX		23 min
Nov 16, 6:15 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	60 min
Nov 16, 7:22 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Plaquemines	68 min
Nov 16, 7:41 AM CST	Special Marine Warning	LIX		2 hr
Nov 16, 10:29 AM CST	Special Marine Warning	LIX		61 min
Nov 16, 10:30 AM CST	Special Marine Warning	LIX		90 min
Nov 16, 10:31 AM CST	Small Craft Advisory	LIX		46 hr

Nearby

Tornado Warnings in Louisiana, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.