Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 114, NWS Mobile, AL

December 25, 20124 counties in Mississippi

NWS Mobile, AL issued this tornado warning at Dec 25, 2012, 4:12 PM CST for 4 counties in Mississippi. It was in force for 48 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 25, 2012, 4:12 PM CST (22:12 UTC)
Expired: Dec 25, 2012, 5:00 PM CST
In force: 48 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 22:13 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 watch it was issued in

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

Issued	Product	Office	Lasted
Dec 25, 12:58 PM CST	Tornado Watch PDS	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.2 hours before the alert went out and 85 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: 790 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 10.0

Open this sounding in Storm Lab

The text

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

729 
WFUS54 KMOB 252212 RRA
TORMOB
MSC039-041-111-131-252300-
/O.NEW.KMOB.TO.W.0114.121225T2212Z-121225T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
412 PM CST TUE DEC 25 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHWESTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  STONE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 500 PM CST

* AT 408 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 18 MILES SOUTHWEST OF WIGGINS...OR 15 MILES
  WEST OF MCHENRY...MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WIGGINS...            PERKINSTON...         MCHENRY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI. A TORNADO WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM CST TUESDAY EVENING FOR SOUTH
CENTRAL ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3082 8935 3092 8921 3091 8915 3095 8914
      3098 8906 3110 8883 3093 8872 3073 8886
      3067 8910 3067 8923 3064 8924 3065 8935
TIME...MOT...LOC 2212Z 235DEG 46KT 3073 8934

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 25, 3:19 PM CST	Tornado Warning	MOB	Perry, Stone	56 min
Dec 25, 3:49 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	56 min
Dec 25, 4:06 PM CST	Tornado Warning	MOB	Greene, Perry	54 min
Dec 25, 4:14 PM CST	Tornado Warning	MOB	Perry, Wayne	61 min
Dec 25, 4:24 PM CST	Tornado Warning	MOB	Wayne	66 min
Dec 25, 4:50 PM CST	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	55 min
Dec 25, 4:52 PM CST	Tornado Warning	MOB	Wayne	53 min
Dec 25, 5:00 PM CST	Tornado Warning	MOB	George, Greene, Perry	45 min
Dec 25, 5:28 PM CST	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone, Wayne	62 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; radar from the NEXRAD Level II archive.