Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 61, NWS New Orleans, LA

May 13, 2011Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at May 13, 2011, 2:33 PM CDT for Plaquemines Parish, Louisiana. It was in force for 27 min. 1 report 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 13, 2011, 2:33 PM CDT (19:33 UTC)
Expired: May 13, 2011, 3:00 PM CDT
In force: 27 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Plaquemines Parish, LA

What was reported inside it

Time	Report	Where	Remark
May 13, 2:50 PM CDT	TORNADO	Buras, LA	REPORTED TORNADO IN THE SUNRISE AREA. SHERIFF REPORTED SIGN WAS DAMAGED IN FRONT OF THE SOUTH PLAQUEMINES PARISH HIGH SCHOOL IN BURAS...HIGHWAY 23.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.6 hours before the alert went out and 104 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: 2741 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.3

Open this sounding in Storm Lab

The text

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

626 
WFUS54 KLIX 131933
TORLIX
LAC075-132000-
/O.NEW.KLIX.TO.W.0061.110513T1933Z-110513T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
233 PM CDT FRI MAY 13 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL PLAQUEMINES PARISH IN SOUTHEAST LOUISIANA...

* UNTIL 300 PM CDT

* AT 228 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES SOUTH OF
  EMPIRE...OR 13 MILES SOUTHEAST OF PORT SULPHUR...MOVING EAST AT 20
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BURAS...VENICE AND BOOTHVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 2925 8962 2925 8963 2928 8967 2940 8970
      2943 8952 2942 8951 2939 8951 2941 8948
      2928 8925 2923 8958
TIME...MOT...LOC 1933Z 258DEG 19KT 2933 8958

$$

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 13, 12:12 PM CDT	Special Marine Warning	LIX		63 min
May 13, 12:29 PM CDT	Special Marine Warning	LIX		61 min
May 13, 1:04 PM CDT	Special Marine Warning	LIX		26 min
May 13, 1:13 PM CDT	Special Marine Warning	LIX		32 min
May 13, 1:28 PM CDT	Tornado Warning	LIX	Jefferson, Lafourche, Plaquemines	32 min
May 13, 1:32 PM CDT	Special Marine Warning	LIX		28 min
May 13, 1:50 PM CDT	Tornado Warning	LIX	Jefferson, Plaquemines	25 min
May 13, 2:07 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	53 min
May 13, 2:17 PM CDT	Tornado Warning	LIX	Plaquemines	28 min
May 13, 2:38 PM CDT	Special Marine Warning	LIX		82 min
May 13, 3:36 PM CDT	Special Marine Warning	LIX		54 min
May 13, 3:43 PM CDT	Special Marine Warning	LIX		92 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.