Alert archive / Louisiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 80, NWS Lake Charles, LA

August 10, 2012Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 10, 2012, 6:29 AM CDT for Avoyelles Parish, Louisiana. It was in force for 37 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: Aug 10, 2012, 6:29 AM CDT (11:29 UTC)
Expired: Aug 10, 2012, 7:06 AM CDT
In force: 37 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

County Avoyelles Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.5 hours before the alert went out and 174 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: 2742 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

173 
WUUS54 KLCH 101129
SVRLCH
LAC009-101230-
/O.NEW.KLCH.SV.W.0080.120810T1129Z-120810T1230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
629 AM CDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AVOYELLES PARISH IN CENTRAL LOUISIANA...
  THIS INCLUDES...MOREAUVILLE...MARKSVILLE...EFFIE...BUNKIE...
  BORDELONVILLE...

* UNTIL 730 AM CDT

* AT 628 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH...6 MILES EAST OF EFFIE...MOVING
  SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAKE OPHELIA NATIONAL WILDLIFE REFUGE BY 635 AM CDT...
  MARKSVILLE BY 645 AM CDT...
  HESSMER BY 700 AM CDT...
  MANSURA AND BORDELONVILLE BY 705 AM CDT...
  MOREAUVILLE BY 715 AM CDT...
  COTTONPORT...BIG BEND AND BUNKIE BY 720 AM CDT...

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.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER INSIDE A STURDY BUILDING AND STAY AWAY
FROM WINDOWS.

&&

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

LAT...LON 3130 9200 3129 9201 3123 9199 3125 9194
      3128 9195 3131 9191 3125 9181 3123 9179
      3123 9176 3119 9167 3114 9171 3109 9170
      3086 9219 3127 9220 3134 9201
TIME...MOT...LOC 1128Z 339DEG 15KT 3122 9205

$$
MM

1 follow-up statement

860 
WWUS54 KLCH 101206
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
706 AM CDT FRI AUG 10 2012

LAC009-101215-
/O.CAN.KLCH.SV.W.0080.000000T0000Z-120810T1230Z/
AVOYELLES LA-
706 AM CDT FRI AUG 10 2012

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

THE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED
AND IS NO LONGER CONSIDERED A THREAT.

LAT...LON 3130 9200 3129 9201 3123 9199 3125 9194
      3128 9195 3131 9191 3125 9181 3123 9179
      3123 9176 3119 9167 3114 9171 3109 9170
      3086 9219 3127 9220 3134 9201
TIME...MOT...LOC 1205Z 339DEG 15KT 3108 9199

$$

MM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:46 PM CDT	Special Weather Statement	LCH	St. Mary	59 min
Aug 9, 11:18 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	72 min
Aug 10, 12:31 AM CDT	Special Weather Statement	LCH	Avoyelles	59 min
Aug 10, 1:34 AM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	35 min
Aug 10, 1:49 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline, Rapides	56 min
Aug 10, 2:39 AM CDT	Special Weather Statement	LCH	Acadia, Allen, Evangeline	66 min
Aug 10, 5:49 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	56 min
Aug 10, 1:42 PM CDT	Special Marine Warning	LCH		63 min
Aug 10, 2:31 PM CDT	Special Weather Statement	LCH	St. Mary	59 min
Aug 10, 5:18 PM CDT	Special Weather Statement	LCH	Beauregard	57 min
Aug 10, 5:46 PM CDT	Special Weather Statement	LCH	Allen	59 min
Aug 10, 6:43 PM CDT	Special Weather Statement	LCH	Allen, Rapides	62 min
Aug 10, 6:50 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	40 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2012 Every severe thunderstorm warning 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.