Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 141, NWS New Orleans, LA

September 4, 2011Walthall County, Mississippi

NWS New Orleans, LA issued this tornado warning at Sep 4, 2011, 3:23 AM CDT for Walthall County, Mississippi. It was in force for 14 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
Sep 4, 2011, 3:23 AM CDT (08:23 UTC)
Expired
Sep 4, 2011, 3:37 AM CDT
In force
14 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

County Walthall County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Sep 3, 9:43 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.4 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2011-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1081 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2011-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.193958Sfc1 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
1081 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
495 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

711 
WFUS54 KLIX 040823
TORLIX
MSC147-040900-
/O.NEW.KLIX.TO.W.0141.110904T0823Z-110904T0900Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
323 AM CDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN WALTHALL COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 400 AM CDT

* AT 319 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR DEXTER...OR
  15 MILES NORTHEAST OF FRANKLINTON...MOVING NORTH AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  SALEM BY 345 AM CDT...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT SUNDAY MORNING FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3133 9007 3133 9004 3118 9002 3117 9000
      3114 9000 3114 8994 3109 8992 3102 8995
      3100 9006 3100 9008 3135 9017 3136 9011
TIME...MOT...LOC 0823Z 170DEG 32KT 3106 8999

$$


24/RR
1 follow-up statement
197 
WWUS54 KLIX 040837
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
337 AM CDT SUN SEP 4 2011

MSC147-040846-
/O.CAN.KLIX.TO.W.0141.000000T0000Z-110904T0900Z/
WALTHALL MS-
337 AM CDT SUN SEP 4 2011

...THE TORNADO WARNING FOR EASTERN WALTHALL COUNTY IS CANCELLED...

THE ROTATION INDICATED BY NATIONAL WEATHER SERVICE RADAR HAS 
DIMINISHED. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT SUNDAY MORNING FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 3133 9007 3133 9004 3118 9002 3117 9000
      3114 9000 3114 8994 3109 8992 3102 8995
      3100 9006 3100 9008 3135 9017 3136 9011
TIME...MOT...LOC 0836Z 170DEG 32KT 3117 9001

$$


24/RR

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 7:02 PM CDTTornado WarningLIXHarrison13 min
Sep 3, 8:58 PM CDTTornado WarningLIXHarrison47 min
Sep 3, 9:37 PM CDTTornado WarningLIXHancock, Harrison38 min
Sep 3, 10:16 PM CDTTornado WarningLIXHancock, Pearl River29 min
Sep 3, 11:22 PM CDTTornado WarningLIXHancock, Harrison23 min
Sep 3, 11:41 PM CDTTornado WarningLIXHancock, Harrison, Pearl River34 min
Sep 4, 12:40 AM CDTTornado WarningLIXHarrison20 min
Sep 4, 12:41 AM CDTTornado WarningLIXHarrison34 min
Sep 4, 1:00 AM CDTTornado WarningLIXHarrison15 min
Sep 4, 1:14 AM CDTTornado WarningLIXJackson31 min
Sep 4, 4:45 AM CDTTornado WarningLIXHancock, Harrison45 min
Sep 4, 5:09 AM CDTTornado WarningLIXHancock, Pearl River51 min
Sep 4, 5:27 AM CDTTornado WarningLIXHancock, Pearl River33 min
Sep 4, 8:38 AM CDTFlash Flood WarningLIXPearl River3 hr
Sep 4, 10:30 AM CDTFlash Flood WarningLIXHarrison, Jackson3 hr
Sep 4, 10:51 AM CDTTornado WarningLIXHarrison24 min
Sep 4, 11:00 AM CDTRiver Flood WarningLIXHancock, Pearl River16 days
Sep 4, 11:00 AM CDTRiver Flood WarningLIXHancock, Pearl River18 days
Sep 4, 1:21 PM CDTTornado WarningLIXHarrison, Jackson39 min
Sep 4, 1:27 PM CDTFlash Flood WarningLIXHarrison, Jackson3 hr
Sep 4, 1:56 PM CDTTornado WarningLIXJackson34 min
Sep 4, 2:32 PM CDTTornado WarningLIXPike28 min
Sep 4, 2:59 PM CDTTornado WarningLIXAmite, Pike46 min
Sep 4, 3:43 PM CDTTornado WarningLIXPike, Walthall47 min

Nearby

Tornado Warnings in Mississippi, 2011Every tornado warning in 2011Tornadoes 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.