Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 90, NWS New Orleans, LA

December 20, 2012Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Dec 20, 2012, 5:44 AM CST for Pearl River County, Mississippi. It was in force for 16 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, 5:44 AM CST (11:44 UTC)
Expired: Dec 20, 2012, 6:00 AM CST
In force: 16 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Pearl River County, MS

The watch it was issued in

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

Issued	Product	Office	Lasted
Dec 20, 4:23 AM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.7 hours before the alert went out and 76 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: 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.

185 
WFUS54 KLIX 201144
TORLIX
MSC109-201200-
/O.NEW.KLIX.TO.W.0090.121220T1144Z-121220T1200Z/

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

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 600 AM CST

* AT 541 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER PEARL RIVER
  COUNTY...OR 7 MILES EAST OF POPLARVILLE...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.

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

&&

LAT...LON 3081 8934 3077 8942 3087 8952 3100 8934
      3099 8934
TIME...MOT...LOC 1145Z 232DEG 38KT 3085 8938

$$

1 follow-up statement

946 
WWUS54 KLIX 201156
SVSLIX

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

MSC109-201204-
/O.EXP.KLIX.TO.W.0090.000000T0000Z-121220T1200Z/
PEARL RIVER MS-
556 AM CST THU DEC 20 2012

...THE TORNADO WARNING FOR NORTHEASTERN PEARL RIVER COUNTY WILL
EXPIRE AT 600 AM CST...

AT 554 AM CST...THE RADAR INDICATED TORNADO HAD MOVED EAST OF PEARL 
RIVER 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 3081 8934 3077 8942 3087 8952 3100 8934
      3099 8934
TIME...MOT...LOC 1154Z 232DEG 38KT 3091 8929

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 4:05 AM CST	Tornado Warning	LIX	Jackson	25 min
Dec 20, 5:31 AM CST	Tornado Warning	LIX	Pike, Walthall	29 min
Dec 20, 6:16 AM CST	Severe Thunderstorm Warning	LIX	Pearl River	29 min
Dec 20, 6:31 AM CST	Severe Thunderstorm Warning	LIX	Pearl River	44 min
Dec 20, 6:47 AM CST	Severe Thunderstorm Warning	LIX	Pearl River	43 min
Dec 20, 7:34 AM CST	Tornado Warning	LIX	Hancock, Harrison	26 min
Dec 20, 8:03 AM CST	Severe Thunderstorm Warning	LIX	Harrison	27 min
Dec 20, 9:13 AM CST	Severe Thunderstorm Warning	LIX	Harrison, Jackson	47 min

Nearby

Tornado Warnings in Mississippi, 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.