Alert archive / Louisiana / Tornado Warnings in 2012

Tornado Warning 81, NWS New Orleans, LA

December 10, 2012East Feliciana Parish, Saint Helena Parish, Louisiana; Amite County, Mississippi

NWS New Orleans, LA issued this tornado warning at Dec 10, 2012, 6:31 AM CST for East Feliciana Parish, Saint Helena Parish, Louisiana; Amite County, Mississippi. It was in force for 29 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
Dec 10, 2012, 6:31 AM CST (12:31 UTC)
Expired
Dec 10, 2012, 7:00 AM CST
In force
29 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

Counties East Feliciana Parish, LA, Saint Helena Parish, LA, Amite County, MS

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Dec 10, 5:44 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.5 hours before the alert went out and 129 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2012-12-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 767 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2012-12-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 237 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
767 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
488 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
237 m²/s²
0-3 km storm-relative helicity
263 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.9

Open this sounding in Storm Lab

The text

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

041 
WFUS54 KLIX 101231
TORLIX
LAC037-091-MSC005-101300-
/O.NEW.KLIX.TO.W.0081.121210T1231Z-121210T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
631 AM CST MON DEC 10 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN EAST FELICIANA PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF CLINTON...
  NORTHERN ST. HELENA PARISH IN SOUTHEAST LOUISIANA...
  SOUTHEASTERN AMITE COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 700 AM CST

* AT 627 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CLINTON...
  MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FELPS...DARLINGTON...EASLEYVILLE AND GILLSBERG

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM CST MONDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3113 9059 3100 9056 3096 9057 3076 9091
      3089 9106 3114 9079
TIME...MOT...LOC 1231Z 226DEG 26KT 3089 9091

$$
1 follow-up statement
221 
WWUS54 KLIX 101251
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
651 AM CST MON DEC 10 2012

LAC037-101300-
/O.CAN.KLIX.TO.W.0081.000000T0000Z-121210T1300Z/
EAST FELICIANA LA-
651 AM CST MON DEC 10 2012

...THE TORNADO WARNING FOR NORTHEASTERN EAST FELICIANA PARISH IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS MOVED OUT OF EAST FELICIANA 
PARISH. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM CST MONDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 3100 9056 3096 9057 3081 9083 3093 9085
      3106 9071 3113 9059
TIME...MOT...LOC 1250Z 239DEG 30KT 3095 9073

$$

LAC091-MSC005-101300-
/O.CON.KLIX.TO.W.0081.000000T0000Z-121210T1300Z/
AMITE MS-ST. HELENA LA-
651 AM CST MON DEC 10 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 AM CST FOR
SOUTHEASTERN AMITE COUNTY...AND NORTHERN ST. HELENA PARISH...

AT 647 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
STORM WAS LOCATED NEAR EASLEYVILLE...OR 9 MILES NORTHWEST OF
GREENSBURG...MOVING NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GILLSBERG

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM CST MONDAY MORNING 
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3100 9056 3096 9057 3081 9083 3093 9085
      3106 9071 3113 9059
TIME...MOT...LOC 1250Z 239DEG 30KT 3095 9073

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 3:13 AM CSTSmall Craft AdvisoryLIX24 hr
Dec 10, 6:55 AM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena, West Baton Rouge35 min
Dec 10, 7:23 AM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, Livingston, Saint Helena, West Baton Rouge37 min
Dec 10, 7:24 AM CSTSevere Thunderstorm WarningLIXTangipahoa, Washington36 min
Dec 10, 7:33 AM CSTTornado WarningLIXWashington27 min
Dec 10, 7:45 AM CSTTornado WarningLIXLivingston, Saint Helena30 min
Dec 10, 7:53 AM CSTTornado WarningLIXWashington37 min
Dec 10, 7:56 AM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena, Tangipahoa34 min
Dec 10, 8:20 AM CSTSevere Thunderstorm WarningLIXAscension, Assumption, Iberville, Saint James40 min
Dec 10, 8:23 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington52 min
Dec 10, 8:46 AM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, Livingston, Saint Helena, Saint Tammany, Tangipahoa29 min
Dec 10, 8:54 AM CSTTornado WarningLIXAscension, Livingston36 min
Dec 10, 8:58 AM CSTSevere Thunderstorm WarningLIXAscension, Saint James, Saint John the Baptist47 min
Dec 10, 9:00 AM CSTSpecial Marine WarningLIX60 min
Dec 10, 9:10 AM CSTSevere Thunderstorm WarningLIXWashington65 min
Dec 10, 9:19 AM CSTTornado WarningLIXWashington26 min
Dec 10, 9:25 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington65 min
Dec 10, 9:43 AM CSTSevere Thunderstorm WarningLIXAssumption, Lafourche, Saint Charles, Saint James, Saint John the Baptist47 min
Dec 10, 9:55 AM CSTSpecial Marine WarningLIX50 min
Dec 10, 10:18 AM CSTSevere Thunderstorm WarningLIXSaint Tammany42 min
Dec 10, 10:42 AM CSTSpecial Marine WarningLIX33 min
Dec 10, 9:41 AM CSTTornado WarningLIXPearl River49 min
Dec 10, 10:17 AM CSTSevere Thunderstorm WarningLIXHancock, Pearl River22 min

Nearby

Tornado Warnings in Louisiana, 2012Tornado Warnings in Mississippi, 2012Every tornado warning in 2012Tornadoes in 2012

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.