Alert archive / Louisiana / Tornado Warnings in 2013

Tornado Warning 49, NWS New Orleans, LA

May 22, 2013Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at May 22, 2013, 9:34 AM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 26 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: May 22, 2013, 9:34 AM CDT (14:34 UTC)
Expired: May 22, 2013, 10:00 AM CDT
In force: 26 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.6 hours before the alert went out and 109 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: 1207 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

916 
WFUS54 KLIX 221434
TORLIX
LAC057-109-221500-
/O.NEW.KLIX.TO.W.0049.130522T1434Z-130522T1500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
934 AM CDT WED MAY 22 2013

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL LAFOURCHE PARISH IN SOUTHEAST LOUISIANA...
  NORTH CENTRAL TERREBONNE PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF HOUMA...

* UNTIL 1000 AM CDT

* AT 932 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR BAYOU
  CANE...OR NEAR HOUMA...MOVING NORTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  RACELAND...MATHEWS AND LOCKPORT

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.

PLEASE FOLLOW OUR OFFICE ON BOTH FACEBOOK AND TWITTER FOR MORE
INFORMATION ON SEVERE WEATHER AND TO RELAY WEATHER REPORTS AND
PHOTOS.

&&

LAT...LON 2982 9055 2963 9042 2949 9075 2965 9085
TIME...MOT...LOC 1434Z 241DEG 14KT 2962 9071

$$

95/DM

1 follow-up statement

849 
WWUS54 KLIX 221500
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1000 AM CDT WED MAY 22 2013

LAC057-109-221506-
/O.EXP.KLIX.TO.W.0049.000000T0000Z-130522T1500Z/
TERREBONNE LA-LAFOURCHE LA-
1000 AM CDT WED MAY 22 2013

...THE TORNADO WARNING FOR CENTRAL LAFOURCHE AND NORTH CENTRAL
TERREBONNE PARISHES WILL EXPIRE AT 1000 AM CDT...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED. STRONG WIND GUSTS 
OF 35 TO 45 MPH...WHICH CAN DOWN TREE LIMBS AND BLOW AROUND LOOSE 
OBJECT SUCH AS TRASH CANS...WILL STILL BE POSSIBLE AS THUNDERSTORMS 
CONTINUE TO MOVE THROUGH THE AREA.

LAT...LON 2982 9055 2963 9042 2949 9075 2965 9085
TIME...MOT...LOC 1456Z 241DEG 14KT 2966 9062

$$

95/DM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 4:23 AM CDT	Flash Flood Warning	LIX	East Feliciana, West Feliciana	3 hr
May 22, 5:50 AM CDT	Flash Flood Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Tangipahoa, West Baton Rouge	115 min
May 22, 7:32 AM CDT	Special Marine Warning	LIX		28 min
May 22, 8:38 AM CDT	Flash Flood Warning	LIX	Assumption, Saint James	112 min
May 22, 8:45 AM CDT	Special Marine Warning	LIX		60 min
May 22, 8:52 AM CDT	Special Marine Warning	LIX		53 min
May 22, 12:49 PM CDT	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Terrebonne	56 min
May 22, 3:48 PM CDT	Special Marine Warning	LIX		57 min
May 22, 4:42 PM CDT	Special Marine Warning	LIX		93 min
May 22, 6:16 PM CDT	Special Marine Warning	LIX		59 min

Nearby

Tornado Warnings in Louisiana, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.