Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 88, NWS New Orleans, LA

December 20, 2012Jackson County, Mississippi

NWS New Orleans, LA issued this tornado warning at Dec 20, 2012, 4:05 AM CST for Jackson County, Mississippi. It was in force for 25 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 20, 2012, 4:05 AM CST (10:05 UTC)
Expired
Dec 20, 2012, 4:30 AM CST
In force
25 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

County Jackson County, MS

The radar

The Mobile radar (KMOB), 39 km from the middle of the area, began a volume at 10:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.1 hours before the alert went out and 122 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 2012-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2012-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 242 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
673 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
242 m²/s²
0-3 km storm-relative helicity
277 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.

761 
WFUS54 KLIX 201005
TORLIX
MSC059-201030-
/O.NEW.KLIX.TO.W.0088.121220T1005Z-121220T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
405 AM CST THU DEC 20 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN JACKSON COUNTY IN SOUTHERN MISSISSIPPI...
  THIS INCLUDES THE CITY OF PASCAGOULA...

* UNTIL 430 AM CST

* AT 401 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHEAST OF PASCAGOULA...MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 3034 8840 3035 8843 3032 8846 3031 8850
      3037 8856 3050 8840 3048 8839 3035 8839
TIME...MOT...LOC 1006Z 228DEG 39KT 3037 8841

$$
2 follow-up statements
716 
WWUS54 KLIX 201018
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
418 AM CST THU DEC 20 2012

MSC059-201030-
/O.CON.KLIX.TO.W.0088.000000T0000Z-121220T1030Z/
JACKSON MS-
418 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM CST FOR
SOUTHEASTERN JACKSON COUNTY...

AT 413 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
STORM WAS LOCATED OVER JACKSON COUNTY...OR 8 MILES EAST OF MOSS
POINT...MOVING NORTHEAST AT 45 MPH.

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 3040 8843 3046 8844 3046 8842 3046 8840
      3042 8840 3037 8839
TIME...MOT...LOC 1018Z 221DEG 39KT 3046 8836

$$
480 
WWUS54 KLIX 201023
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
423 AM CST THU DEC 20 2012

MSC059-201032-
/O.EXP.KLIX.TO.W.0088.000000T0000Z-121220T1030Z/
JACKSON MS-
423 AM CST THU DEC 20 2012

...THE TORNADO WARNING FOR SOUTHEASTERN JACKSON COUNTY WILL EXPIRE AT
430 AM CST...

AT 422 AM CST...THE THUNDERSTORM THAT PROMPTED THE TORNADO WARNING 
HAD MOVED EAST OF JACKSON COUNTY...SO THE WARNING WILL BE ALLOWED TO 
EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 3040 8843 3046 8844 3046 8842 3046 8840
      3042 8840 3037 8839
TIME...MOT...LOC 1022Z 221DEG 39KT 3049 8832

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 20, 5:31 AM CSTTornado WarningLIXPike, Walthall29 min
Dec 20, 5:44 AM CSTTornado WarningLIXPearl River16 min
Dec 20, 6:16 AM CSTSevere Thunderstorm WarningLIXPearl River29 min
Dec 20, 6:31 AM CSTSevere Thunderstorm WarningLIXPearl River44 min
Dec 20, 6:47 AM CSTSevere Thunderstorm WarningLIXPearl River43 min
Dec 20, 7:34 AM CSTTornado WarningLIXHancock, Harrison26 min
Dec 20, 8:03 AM CSTSevere Thunderstorm WarningLIXHarrison27 min
Dec 20, 9:13 AM CSTSevere Thunderstorm WarningLIXHarrison, Jackson47 min

Nearby

Tornado 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; radar from the NEXRAD Level II archive.