Alert archive / Louisiana / Tornado Warnings in 2012

Tornado Warning 5, NWS New Orleans, LA

February 4, 2012Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Feb 4, 2012, 3:18 PM CST for Saint Tammany Parish, Louisiana. It was in force for 17 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: Feb 4, 2012, 3:18 PM CST (21:18 UTC)
Expired: Feb 4, 2012, 3:35 PM CST
In force: 17 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.3 hours before the alert went out and 35 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: 334 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 441 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

097 
WFUS54 KLIX 042118
TORLIX
LAC103-042145-
/O.NEW.KLIX.TO.W.0005.120204T2118Z-120204T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
318 PM CST SAT FEB 4 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF MANDEVILLE...

* UNTIL 345 PM CST

* AT 315 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  MANDEVILLE...MOVING EAST AT 25 MPH.

* THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED PARISH.

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 3030 8996 3029 9000 3032 9002 3032 9004
      3035 9007 3036 9013 3037 9014 3042 9016
      3043 8999
TIME...MOT...LOC 2118Z 258DEG 23KT 3036 9010

$$

1 follow-up statement

331 
WWUS54 KLIX 042135
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
335 PM CST SAT FEB 4 2012

LAC103-042145-
/O.CAN.KLIX.TO.W.0005.000000T0000Z-120204T2145Z/
ST. TAMMANY LA-
335 PM CST SAT FEB 4 2012

...THE TORNADO WARNING FOR CENTRAL ST. TAMMANY PARISH IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED AND NO LONGER IS 
EXPECTED TO PRODUCE A TORNADO.

LAT...LON 3030 8996 3029 9000 3032 9002 3032 9004
      3035 9007 3036 9013 3037 9014 3042 9016
      3043 8999
TIME...MOT...LOC 2135Z 258DEG 23KT 3038 8998

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 4, 9:56 AM CST	River Flood Warning	LIX	Saint Tammany, Washington	26 days
Feb 4, 2:37 PM CST	Tornado Warning	LIX	Saint Tammany, Tangipahoa	26 min
Feb 4, 2:43 PM CST	Special Marine Warning	LIX		62 min

Nearby

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