Alert archive / Louisiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Lake Charles, LA

April 15, 2011Avoyelles Parish, Rapides Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 15, 2011, 9:11 AM CDT for Avoyelles Parish, Rapides Parish, Louisiana. It was in force for 42 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 15, 2011, 9:11 AM CDT (14:11 UTC)
Expired: Apr 15, 2011, 9:53 AM CDT
In force: 42 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Avoyelles Parish, LA, Rapides 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 15, 7:32 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.2 hours before the alert went out and 171 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.

703 
WUUS54 KLCH 151411
SVRLCH
LAC009-079-151515-
/O.NEW.KLCH.SV.W.0041.110415T1411Z-110415T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
911 AM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN AVOYELLES PARISH IN CENTRAL LOUISIANA...
  THIS INCLUDES EFFIE...
  EAST CENTRAL RAPIDES PARISH IN CENTRAL LOUISIANA...
  THIS INCLUDES ALEXANDRIA...

* UNTIL 1015 AM CDT

* AT 911 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH...7 MILES SOUTHEAST OF
  ALEXANDRIA...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CENTERPOINT AND RUBY BY 920 AM CDT...
  EFFIE BY 925 AM CDT...
  DEVILLE BY 930 AM CDT...
  BROUILLETTE BY 935 AM CDT...
  LAKE OPHELIA NATIONAL WILDLIFE REFUGE BY 945 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT FRIDAY AFTERNOON
FOR WEST CENTRAL LOUISIANA.

&&

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

LAT...LON 3136 9207 3133 9208 3134 9202 3132 9199
      3129 9201 3124 9198 3126 9194 3129 9195
      3131 9192 3117 9169 3116 9170 3111 9242
      3131 9247 3139 9211
TIME...MOT...LOC 1411Z 259DEG 36KT 3124 9234

$$

21

2 follow-up statements

280 
WWUS54 KLCH 151437
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
937 AM CDT FRI APR 15 2011

LAC009-079-151515-
/O.CON.KLCH.SV.W.0041.000000T0000Z-110415T1515Z/
RAPIDES LA-AVOYELLES LA-
937 AM CDT FRI APR 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT
FOR NORTHERN AVOYELLES AND EXTREME NORTHEASTERN RAPIDES PARISHES...

AT 931 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR EFFIE..MOVING EAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAKE OPHELIA NATIONAL WILDLIFE REFUGE BY 945 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT FRIDAY AFTERNOON
FOR WEST CENTRAL LOUISIANA.

&&

LAT...LON 3116 9217 3134 9222 3139 9211 3136 9207
      3133 9208 3134 9202 3132 9199 3129 9201
      3124 9198 3126 9194 3129 9195 3131 9192
      3120 9174
TIME...MOT...LOC 1437Z 259DEG 36KT 3129 9204

$$

JT

151 
WWUS54 KLCH 151453
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
953 AM CDT FRI APR 15 2011

LAC009-079-151503-
/O.CAN.KLCH.SV.W.0041.000000T0000Z-110415T1515Z/
RAPIDES LA-AVOYELLES LA-
953 AM CDT FRI APR 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN AVOYELLES AND EXTREME
NORTHEASTERN RAPIDES PARISHES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT FRIDAY AFTERNOON
FOR WEST CENTRAL LOUISIANA.

LAT...LON 3116 9217 3134 9222 3139 9211 3136 9207
      3133 9208 3134 9202 3132 9199 3129 9201
      3124 9198 3126 9194 3129 9195 3131 9192
      3120 9174
TIME...MOT...LOC 1453Z 259DEG 36KT 3132 9186

$$

JT

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, 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, 2:35 PM CDT	Tornado Warning	LCH	Avoyelles, Saint Landry	25 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

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.