Alert archive / Louisiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Lake Charles, LA

May 31, 2012Beauregard Parish, Calcasieu Parish, Louisiana; Orange County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at May 31, 2012, 11:23 AM CDT for Beauregard Parish, Calcasieu Parish, Louisiana; Orange County, Texas. It was in force for 32 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 31, 2012, 11:23 AM CDT (16:23 UTC)
Expired: May 31, 2012, 11:55 AM CDT
In force: 32 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Beauregard Parish, LA, Calcasieu Parish, LA, Orange County, TX

The radar

The Lake Charles radar (KLCH), 26 km from the middle of the area, began a volume at 16:23 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.

What was reported inside it

Time	Report	Where	Remark
May 31, 11:25 AM CDT	TSTM WND DMG	Singer, LA	SHERIFF REPORTS TREE DOWN IN SINGER AND PEA SIZED HAIL JUST TO THE SOUTH OF SINGER
May 31, 11:40 AM CDT	FUNNEL CLOUD	Singer, LA	PUBLIC REPORTED SEEING MULIPLE SMALL FUNNEL CLOUDS NOT TOUCHING THE GROUND
May 31, 11:55 AM CDT	TSTM WND DMG	2 N Dequincy, LA	OFF DUTY NWS EMPLOYEE REPORTED THAT A PINE TREE IS DOWN ON A POWER LINE JUST NORTH OF DEQUINCY LA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 31, 10:41 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.4 hours before the alert went out and 27 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: 2548 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

918 
WUUS54 KLCH 311623
SVRLCH
LAC011-019-TXC361-311730-
/O.NEW.KLCH.SV.W.0047.120531T1623Z-120531T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1123 AM CDT THU MAY 31 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL ORANGE COUNTY IN SOUTHEAST TEXAS...
  THIS INCLUDES...WEST ORANGE...ORANGE...
  SOUTH CENTRAL BEAUREGARD PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...SINGER...RAGLEY...
  CALCASIEU PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...WESTLAKE...VINTON...SULPHUR...MOSS BLUFF...LAKE
  CHARLES REGIONAL AIRPORT...LAKE CHARLES...DE QUINCY...

* UNTIL 1230 PM CDT

* AT 1123 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH...FROM SINGER TO ORANGE...MOVING SOUTHEAST AT
  15 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  DE QUINCY BY 1130 AM CDT...
  VINTON BY 1140 AM CDT...
  EDGERLY BY 1150 AM CDT...
  RAGLEY AND BUHLER BY NOON CDT...
  SULPHUR BY 1215 PM CDT...
  CARLYSS BY 1220 PM 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
THURSDAY EVENING FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

&&

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

LAT...LON 3008 9379 3066 9342 3053 9313 3023 9315
      3006 9325
TIME...MOT...LOC 1623Z 305DEG 15KT 3058 9339 3009 9375

$$

06

1 follow-up statement

139 
WWUS54 KLCH 311655
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1155 AM CDT THU MAY 31 2012

LAC011-019-TXC361-311704-
/O.CAN.KLCH.SV.W.0047.000000T0000Z-120531T1730Z/
BEAUREGARD LA-CALCASIEU LA-ORANGE TX-
1155 AM CDT THU MAY 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ORANGE COUNTY...
AND CALCASIEU AND SOUTH CENTRAL BEAUREGARD PARISHES IS CANCELLED...

THE LINE OF STORMS HAS WEAKENED AND ARE NO LONGER SEVERE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM CDT
THURSDAY EVENING FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

LAT...LON 3008 9379 3066 9342 3053 9313 3023 9315
      3006 9325
TIME...MOT...LOC 1654Z 305DEG 15KT 3051 9327 3002 9363

$$

06

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 8:44 PM CDT	Special Weather Statement	LCH	Avoyelles	61 min
May 31, 10:17 AM CDT	Special Weather Statement	LCH	Beauregard, Vernon	58 min
May 31, 10:49 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard	41 min
May 31, 11:34 AM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	56 min
May 31, 12:02 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline, Rapides	58 min
May 31, 12:48 PM CDT	Severe Thunderstorm Warning	LCH	Evangeline, Saint Landry	57 min
May 31, 12:58 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Evangeline, Saint Landry	62 min
May 31, 1:15 PM CDT	Special Weather Statement	LCH	Lafayette	60 min
May 31, 1:42 PM CDT	Special Weather Statement	LCH	Saint Martin	63 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2012 Severe Thunderstorm Warnings in Texas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.