Alert archive / Louisiana / Tornado Warnings in 2012

Tornado Warning 42, NWS Lake Charles, LA

March 11, 2012Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Mar 11, 2012, 11:42 PM CDT for Vermilion Parish, Louisiana. It was in force for 33 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
Mar 11, 2012, 11:42 PM CDT (04:42 UTC)
Expired
Mar 12, 2012, 12:15 AM CDT
In force
33 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 104 km from the middle of the area, began a volume at 04:44 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.

IssuedProductOfficeLasted
Mar 11, 6:42 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.7 hours before the alert went out and 102 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, Lake Charles Mun, LA at 00:00Z on 2012-03-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1310 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, Lake Charles Mun, LA at 00:00Z on 2012-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 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
1310 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
439 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

061 
WFUS54 KLCH 120442
TORLCH
LAC113-120515-
/O.NEW.KLCH.TO.W.0042.120312T0442Z-120312T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1142 PM CDT SUN MAR 11 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN VERMILION PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES PECAN ISLAND...

* UNTIL 1215 AM CDT

* AT 1140 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHWEST OF PECAN ISLAND...MOVING NORTHEAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  PECAN ISLAND BY 1150 PM CDT...

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.

TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT WAIT UNTIL YOU SEE
OR HEAR THE TORNADO...IT MAY BE TOO LATE. TAKE COVER NOW!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
SOUTHWESTERN LOUISIANA.

&&

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

LAT...LON 2954 9239 2956 9256 2963 9258 2985 9226
      2974 9217 2973 9218 2974 9219 2973 9219
      2971 9215 2967 9212 2966 9212 2953 9237
TIME...MOT...LOC 0443Z 232DEG 40KT 2959 9248

$$

27
2 follow-up statements
035 
WWUS54 KLCH 120458
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1158 PM CDT SUN MAR 11 2012

LAC113-120515-
/O.CON.KLCH.TO.W.0042.000000T0000Z-120312T0515Z/
VERMILION LA-
1158 PM CDT SUN MAR 11 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR SOUTHERN
VERMILION PARISH...

AT 1154 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
TORNADO ON RADAR.  THIS RADAR INDICATED TORNADO WAS LOCATED NEAR
PECAN ISLAND..MOVING EAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  RURAL SOUTHERN VERMILION PARISH AT 1210 AM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT WAIT UNTIL YOU SEE
OR HEAR THE TORNADO...IT MAY BE TOO LATE. TAKE COVER NOW!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
SOUTHWESTERN LOUISIANA.

&&

LAT...LON 2954 9239 2955 9248 2964 9254 2978 9230
      2974 9217 2973 9218 2974 9219 2973 9219
      2971 9215 2967 9212 2966 9212 2953 9237
TIME...MOT...LOC 0458Z 268DEG 16KT 2959 9243

$$

BRAZZELL
679 
WWUS54 KLCH 120512
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1212 AM CDT MON MAR 12 2012

LAC113-120522-
/O.EXP.KLCH.TO.W.0042.000000T0000Z-120312T0515Z/
VERMILION LA-
1212 AM CDT MON MAR 12 2012

...THE TORNADO WARNING FOR SOUTHERN VERMILION PARISH WILL EXPIRE AT
1215 AM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT MONDAY MORNING FOR
SOUTHWESTERN LOUISIANA.

LAT...LON 2954 9239 2955 9248 2964 9254 2978 9230
      2974 9217 2973 9218 2974 9219 2973 9219
      2971 9215 2967 9212 2966 9212 2953 9237
TIME...MOT...LOC 0512Z 268DEG 16KT 2959 9236

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 11, 7:41 PM CDTSpecial Marine WarningLCH64 min
Mar 11, 8:02 PM CDTAreal Flood AdvisoryLCHCalcasieu88 min
Mar 11, 8:16 PM CDTTornado WarningLCHRapides29 min
Mar 11, 9:12 PM CDTSpecial Marine WarningLCH63 min
Mar 11, 9:19 PM CDTSevere Thunderstorm WarningLCHRapides56 min
Mar 11, 9:28 PM CDTTornado WarningLCHCameron, Jefferson Davis32 min
Mar 11, 9:42 PM CDTTornado WarningLCHJefferson Davis33 min
Mar 11, 10:06 PM CDTTornado WarningLCHJefferson Davis24 min
Mar 11, 10:20 PM CDTTornado WarningLCHJefferson Davis25 min
Mar 11, 10:39 PM CDTTornado WarningLCHAcadia, Jefferson Davis36 min
Mar 11, 11:11 PM CDTTornado WarningLCHVermilion34 min
Mar 11, 11:13 PM CDTTornado WarningLCHAcadia, Evangeline, Saint Landry31 min
Mar 11, 11:33 PM CDTSpecial Marine WarningLCH57 min
Mar 11, 11:54 PM CDTAreal Flood AdvisoryLCHAcadia, Jefferson Davis3 hr
Mar 12, 12:02 AM CDTSpecial Weather StatementLCHAcadia58 min
Mar 12, 12:13 AM CDTSpecial Weather StatementLCHVermilion62 min
Mar 12, 12:16 AM CDTSpecial Marine WarningLCH59 min
Mar 12, 12:50 AM CDTAreal Flood AdvisoryLCHAcadia, Evangeline, Saint Landry3 hr
Mar 12, 12:52 AM CDTSpecial Weather StatementLCHSaint Martin38 min
Mar 12, 1:12 AM CDTSpecial Weather StatementLCHSaint Landry48 min
Mar 12, 1:42 AM CDTAreal Flood AdvisoryLCHIberia, St. Mary4 hr
Mar 12, 2:23 AM CDTSpecial Weather StatementLCHSaint Martin67 min
Mar 12, 3:06 AM CDTAreal Flood WarningLCHIberia3 hr
Mar 12, 7:48 AM CDTSpecial Weather StatementLCHSaint Landry57 min
Mar 12, 8:51 AM CDTFlash Flood WarningLCHAcadia, Lafayette, Saint Landry3 hr
Mar 12, 9:48 AM CDTFlash Flood WarningLCHSaint Landry, Saint Martin3 hr
Mar 12, 10:59 AM CDTRiver Flood WarningLCHLafayette, Vermilion35 hr
Mar 12, 11:14 AM CDTAreal Flood WarningLCHAcadia48 hr
Mar 12, 11:26 AM CDTAreal Flood Warning EmergencyLCHAcadia, Lafayette, Saint Landry, Saint Martin12 hr
Mar 12, 11:28 AM CDTFlash Flood Warning EmergencyLCHAcadia, Lafayette, Saint Landry, Saint Martin6 hr
Mar 12, 11:36 AM CDTRiver Flood WarningLCHAcadia, Jefferson Davis8 days
Mar 12, 1:41 PM CDTSpecial Weather StatementLCHLafayette64 min
Mar 12, 2:40 PM CDTAreal Flood AdvisoryLCHEvangeline3 hr
Mar 12, 3:43 PM CDTFlash Flood WarningLCHAllen, Evangeline4 hr
Mar 12, 5:30 PM CDTFlash Flood Warning EmergencyLCHAcadia, Allen, Evangeline, Lafayette, Saint Landry, Saint Martin6 hr
Mar 12, 6:18 PM CDTFlash Flood WarningLCHAllen, Evangeline, Rapides, Vernon3 hr

Nearby

Tornado Warnings in Louisiana, 2012Every tornado warning in 2012Tornadoes in 2012

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.