Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 225, NWS Mobile, AL

December 25, 2012Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Dec 25, 2012, 3:49 PM CST for Greene County, Perry County, Wayne County, Mississippi. It was in force for 56 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, 3:49 PM CST (21:49 UTC)
Expired: Dec 25, 2012, 4:45 PM CST
In force: 56 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 113 km from the middle of the area, began a volume at 21:50 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

Jackson, MS (KJAN), launched 12:00Z, 9.8 hours before the alert went out and 142 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

664 
WUUS54 KMOB 252149
SVRMOB
MSC041-111-153-252245-
/O.NEW.KMOB.SV.W.0225.121225T2149Z-121225T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
349 PM CST TUE DEC 25 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 445 PM CST

* AT 345 PM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG
  A LINE EXTENDING FROM 7 MILES SOUTHEAST OF LAUREL TO 8 MILES
  SOUTHEAST OF PETAL TO 16 MILES SOUTH OF HATTIESBURG...AND MOVING
  NORTHEAST AT 30 MPH.

  INDIVIDUAL STORMS ALONG THIS LINE MAY PRODUCE TORNADOES AND
  TORNADO WARNINGS MAY BE REQUIRED DURING THE NEXT HOUR.

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         CLARA...              RICHTON...
  NEW AUGUSTA...        BEAUMONT...

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 3143 8915 3144 8895 3182 8895 3184 8873
      3189 8851 3112 8879 3112 8915
TIME...MOT...LOC 2148Z 245DEG 27KT 3164 8904 3128 8912
          3110 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, 4:06 PM CST	Tornado Warning	MOB	Greene, Perry	54 min
Dec 25, 4:12 PM CST	Tornado Warning	MOB	George, Greene, Perry, Stone	48 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

Severe Thunderstorm Warnings in Mississippi, 2012 Every severe thunderstorm warning 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.