Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 29, NWS Lake Charles, LA

November 15, 2011Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Nov 15, 2011, 9:40 PM CST for Vermilion Parish, Louisiana. It was in force for 35 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 15, 2011, 9:40 PM CST (03:40 UTC)
Expired: Nov 15, 2011, 10:15 PM CST
In force: 35 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 116 km from the middle of the area, began a volume at 03:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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 15, 5:56 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.7 hours before the alert went out and 114 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: 1919 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

677 
WFUS54 KLCH 160340
TORLCH
LAC113-160415-
/O.NEW.KLCH.TO.W.0029.111116T0340Z-111116T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
940 PM CST TUE NOV 15 2011

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL VERMILION PARISH IN SOUTHWEST LOUISIANA...

* UNTIL 1015 PM CST

* AT 938 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER VERMILION
  PARISH...MOVING NORTHEAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL SOUTHEASTERN VERMILION PARISH AT 1000 PM CST

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NATIONAL WEATHER SERVICE RADAR INDICATES A TORNADO MAY FORM AT ANY
TIME. TAKE COVER NOW! ABANDON MOBILE HOMES AND VEHICLES. MOVE TO AN
INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST WEDNESDAY MORNING
FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

&&

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE AT
337-477-5285 EXTENSION 1.

LAT...LON 2955 9228 2972 9220 2968 9211 2967 9212
      2963 9211 2963 9207 2958 9211 2957 9216
      2954 9224
TIME...MOT...LOC 0341Z 216DEG 36KT 2956 9221

$$

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 15, 6:05 PM CST	Special Weather Statement	LCH	Saint Martin	55 min
Nov 15, 6:23 PM CST	Special Marine Warning	LCH		67 min
Nov 15, 6:26 PM CST	Special Weather Statement	LCH	Beauregard	64 min
Nov 15, 6:57 PM CST	Special Weather Statement	LCH	Vernon	63 min
Nov 15, 7:01 PM CST	Special Weather Statement	LCH	Cameron	59 min
Nov 15, 7:50 PM CST	Special Weather Statement	LCH	Acadia, Vermilion	55 min
Nov 15, 8:00 PM CST	Special Weather Statement	LCH	Lafayette, Saint Martin	60 min
Nov 15, 9:27 PM CST	Special Marine Warning	LCH		63 min
Nov 15, 10:11 PM CST	Special Weather Statement	LCH	Saint Martin	64 min
Nov 15, 10:29 PM CST	Severe Thunderstorm Warning	LCH	Iberia	61 min
Nov 16, 9:33 AM CST	Small Craft Advisory	LCH		41 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; radar from the NEXRAD Level II archive.