Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 9, NWS Lake Charles, LA

April 15, 2011Avoyelles Parish, Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Apr 15, 2011, 2:35 PM CDT for Avoyelles Parish, Saint Landry Parish, Louisiana. It was in force for 25 min. 2 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: Apr 15, 2011, 2:35 PM CDT (19:35 UTC)
Expired: Apr 15, 2011, 3:00 PM CDT
In force: 25 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Avoyelles Parish, LA, Saint Landry Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 15, 2:50 PM CDT	TORNADO	8 Nne Palmetto, LA	POSSIBLE TORNADO WITH DAMAGE TO TREES AND AN OUT BUILDING.
Apr 15, 3:05 PM CDT	TSTM WND DMG	5 Wnw Palmetto, LA	NWS STORM SURVEY FOUND DOWNBURST WIND DAMAGE ALONG HIGHWAY 361 ABOUT 2 MILES NORTH OF LEBEAU. ONE LARGE TREE AND SEVERAL LARGE TREE LIMBS WERE BLOWN DOWN. WINDS ESTIMATED AROUND 60 MPH.

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
Apr 15, 7:32 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.6 hours before the alert went out and 151 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: 2429 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

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

137 
WFUS54 KLCH 151935
TORLCH
LAC009-097-152000-
/O.NEW.KLCH.TO.W.0009.110415T1935Z-110415T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
235 PM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL AVOYELLES PARISH IN CENTRAL LOUISIANA...
  NORTHEASTERN ST. LANDRY PARISH IN CENTRAL LOUISIANA...
  THIS INCLUDES...MORROW...BAYOU CURRENT...PALMETTO...

* UNTIL 300 PM CDT

* AT 232 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR BIG CANE...
  MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  PALMETTO BY 245 PM CDT...
  BAYOU CURRENT BY 300 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.

&&

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

LAT...LON 3088 9179 3086 9181 3085 9179 3082 9180
      3079 9175 3073 9173 3067 9208 3084 9214
      3094 9180
TIME...MOT...LOC 1935Z 255DEG 27KT 3078 9201

$$

27

1 follow-up statement

089 
WWUS54 KLCH 151946
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
246 PM CDT FRI APR 15 2011

LAC009-097-152000-
/O.CON.KLCH.TO.W.0009.000000T0000Z-110415T2000Z/
AVOYELLES LA-ST. LANDRY LA-
246 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHEASTERN ST. LANDRY AND SOUTH CENTRAL AVOYELLES PARISHES...

AT 241 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
TORNADO.  THIS TORNADO WAS LOCATED NEAR BIG CANE..MOVING EAST AT 30
MPH.

THE TORNADO WILL BE NEAR...
  BAYOU CURRENT BY 255 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FRIDAY EVENING
FOR SOUTHWESTERN LOUISIANA.

&&

LAT...LON 3088 9179 3086 9181 3085 9179 3082 9180
      3079 9175 3073 9173 3070 9196 3087 9204
      3094 9180
TIME...MOT...LOC 1946Z 255DEG 27KT 3080 9192

$$

BRAZZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 8:12 AM CDT	Special Weather Statement	LCH	Rapides	63 min
Apr 15, 8:23 AM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	67 min
Apr 15, 9:11 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	42 min
Apr 15, 2:10 PM CDT	Special Weather Statement	LCH	Jefferson Davis	65 min
Apr 15, 2:19 PM CDT	Special Weather Statement	LCH	Avoyelles	41 min
Apr 15, 2:23 PM CDT	Special Weather Statement	LCH	Avoyelles	52 min
Apr 15, 2:25 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Saint Landry	50 min
Apr 15, 2:45 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Jefferson Davis	45 min
Apr 15, 3:08 PM CDT	Special Weather Statement	LCH	Lafayette	52 min
Apr 15, 3:15 PM CDT	Small Craft Advisory	LCH		19 hr
Apr 15, 3:15 PM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	16 min
Apr 15, 3:36 PM CDT	Severe Thunderstorm Warning	LCH	Acadia	24 min
Apr 15, 3:53 PM CDT	Special Weather Statement	LCH	Saint Martin	52 min
Apr 15, 3:55 PM CDT	Severe Thunderstorm Warning	LCH	Saint Martin	20 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.