Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 4, NWS Lake Charles, LA

March 5, 2011Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Mar 5, 2011, 11:53 AM CST for Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 52 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: Mar 5, 2011, 11:53 AM CST (17:53 UTC)
Expired: Mar 5, 2011, 12:45 PM CST
In force: 52 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Saint Martin Parish, LA, St. Mary 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
Mar 5, 8:54 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.9 hours before the alert went out and 165 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: 960 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

545 
WFUS54 KLCH 051753
TORLCH
LAC099-101-051845-
/O.NEW.KLCH.TO.W.0004.110305T1753Z-110305T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1153 AM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA...
  THIS INCLUDES STEPHENSVILLE...
  SOUTHEASTERN ST. MARY PARISH IN SOUTH CENTRAL LOUISIANA...
  THIS INCLUDES...PATTERSON...MORGAN CITY...BERWICK...BAYOU VISTA...

* UNTIL 1245 PM CST

* AT 1149 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR PATTERSON
  MEMORIAL AIRPORT...MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  AMELIA AND BAYOU GENEVE

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.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR SOUTHWESTERN LOUISIANA.

&&

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

LAT...LON 2960 9115 2960 9118 2954 9124 2955 9127
      2950 9126 2953 9143 2955 9144 2954 9150
      2972 9150 2987 9119 2982 9108 2971 9110
      2963 9107
TIME...MOT...LOC 1753Z 257DEG 47KT 2966 9133

$$

23

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 5, 12:27 AM CST	Marine Dense Fog Advisory	LCH		9 hr
Mar 5, 3:46 AM CST	Small Craft Advisory	LCH		26 hr
Mar 5, 7:39 AM CST	Special Marine Warning	LCH		66 min
Mar 5, 8:14 AM CST	Severe Thunderstorm Warning	LCH	Acadia, Calcasieu, Cameron, Jefferson Davis, Vermilion	61 min
Mar 5, 8:40 AM CST	Tornado Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	50 min
Mar 5, 9:11 AM CST	Special Marine Warning	LCH		64 min
Mar 5, 9:32 AM CST	Severe Thunderstorm Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	58 min
Mar 5, 9:52 AM CST	Tornado Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	38 min
Mar 5, 10:17 AM CST	Special Marine Warning	LCH		58 min
Mar 5, 10:28 AM CST	Special Weather Statement	LCH	Saint Martin, Vermilion	62 min
Mar 5, 11:04 AM CST	Special Marine Warning	LCH		86 min
Mar 5, 11:42 AM CST	Severe Thunderstorm Warning	LCH	Saint Martin, St. Mary	63 min
Mar 5, 12:33 PM CST	Special Marine Warning	LCH		27 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; the sounding from the Mesonet's radiosonde archive.