Alert archive / Louisiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Lake Charles, LA

April 4, 2011Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 4, 2011, 4:24 PM CDT for Avoyelles Parish, Louisiana. It was in force for 22 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: Apr 4, 2011, 4:24 PM CDT (21:24 UTC)
Expired: Apr 4, 2011, 4:46 PM CDT
In force: 22 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

County Avoyelles 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
Apr 4, 10:53 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.4 hours before the alert went out and 179 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: 1440 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

898 
WUUS54 KLCH 042124
SVRLCH
LAC009-042200-
/O.NEW.KLCH.SV.W.0039.110404T2124Z-110404T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
424 PM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN AVOYELLES PARISH IN CENTRAL LOUISIANA...
  THIS INCLUDES BORDELONVILLE...

* UNTIL 500 PM CDT

* AT 422 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH...OVER BORDELONVILLE...MOVING EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM... WILL BE ACROSS THE EASTERN HALF OF THE  
  PARISH...EAST OF A LAKE OPHELLIA TO BORDELONVILLE LINE TO THE RED  
  RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN. STAY INDOORS...
AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT MONDAY EVENING FOR
SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

&&

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

LAT...LON 3125 9179 3122 9172 3122 9169 3120 9167
      3115 9170 3111 9169 3110 9171 3106 9170
      3104 9174 3104 9196 3124 9198 3126 9194
      3129 9195 3130 9193 3131 9189
TIME...MOT...LOC 2122Z 253DEG 49KT 3117 9185

$$

1 follow-up statement

566 
WWUS54 KLCH 042146
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
446 PM CDT MON APR 4 2011

LAC009-042156-
/O.CAN.KLCH.SV.W.0039.000000T0000Z-110404T2200Z/
AVOYELLES LA-
446 PM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN AVOYELLES PARISH
IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT MONDAY EVENING FOR
SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

LAT...LON 3125 9179 3122 9172 3122 9169 3120 9167
      3115 9170 3111 9169 3110 9171 3106 9170
      3104 9174 3104 9196 3124 9198 3126 9194
      3129 9195 3130 9193 3131 9189
TIME...MOT...LOC 2146Z 253DEG 49KT 3126 9148

$$

BRAZZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:56 PM CDT	Gale Watch	LCH		14 hr
Apr 3, 7:56 PM CDT	Low Water Advisory	LCH		35 hr
Apr 4, 4:16 AM CDT	Wind Advisory	LCH	Allen, Avoyelles, Beauregard, Evangeline, Lafayette, Rapides and 3 more	16 hr
Apr 4, 9:59 AM CDT	Gale Warning	LCH		13 hr
Apr 4, 3:04 PM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	41 min
Apr 4, 3:12 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard	63 min
Apr 4, 3:21 PM CDT	Small Craft Advisory	LCH		19 hr
Apr 4, 3:42 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	48 min
Apr 4, 3:51 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline	39 min
Apr 4, 3:56 PM CDT	Tornado Warning	LCH	Evangeline	34 min
Apr 4, 4:19 PM CDT	Tornado Warning	LCH	Evangeline, Saint Landry	26 min
Apr 4, 4:42 PM CDT	Special Weather Statement	LCH	Saint Landry	33 min
Apr 4, 5:52 PM CDT	Special Weather Statement	LCH	Iberia, Saint Martin, St. Mary	53 min
Apr 4, 6:07 PM CDT	Special Weather Statement	LCH	Cameron	38 min
Apr 4, 6:44 PM CDT	Special Weather Statement	LCH	Jefferson Davis	46 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2011 Every severe thunderstorm warning 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.