Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 228, NWS Mobile, AL

December 25, 2012Choctaw County, Clarke County, Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Dec 25, 2012, 5:40 PM CST for Choctaw County, Clarke County, Wilcox County, Alabama. It was in force for 65 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, 5:40 PM CST (23:40 UTC)
Expired: Dec 25, 2012, 6:45 PM CST
In force: 65 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 162 km from the middle of the area, began a volume at 23:41 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

Birmingham, AL (KBMX), launched 12:00Z, 11.7 hours before the alert went out and 162 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: 1008 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 114 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.

706 
WUUS54 KMOB 252340
SVRMOB
ALC023-025-131-260045-
/O.NEW.KMOB.SV.W.0228.121225T2340Z-121226T0045Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 645 PM CST

* AT 535 PM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  GOLF BALL SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE LOCATED
  ALONG A LINE EXTENDING FROM 17 MILES NORTH OF BUTLER TO 12 MILES
  SOUTHWEST OF BUTLER TO 14 MILES NORTHEAST OF WAYNESBORO...AND
  MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TOXEY...              PENNINGTON...         NEEDHAM...
  LISMAN...             GILBERTOWN...         BUTLER...
  THOMASVILLE...

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 3231 8793 3228 8794 3230 8795 3228 8801
      3218 8800 3214 8804 3208 8804 3205 8811
      3200 8810 3199 8806 3199 8772 3201 8763
      3213 8757 3188 8761 3187 8847 3231 8842
TIME...MOT...LOC 2340Z 270DEG 47KT 3233 8819 3199 8831
          3187 8848

$$

3 follow-up statements

630 
WWUS54 KMOB 260009
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
609 PM CST TUE DEC 25 2012

ALC023-025-131-260045-
/O.CON.KMOB.SV.W.0228.000000T0000Z-121226T0045Z/
CHOCTAW AL-WILCOX AL-CLARKE AL-
609 PM CST TUE DEC 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CST
FOR NORTHWESTERN CLARKE...WEST CENTRAL WILCOX AND NORTHERN CHOCTAW
COUNTIES...

AT 608 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 WEST OF LINDEN TO 12 MILES SOUTHEAST OF
BUTLER TO 14 MILES SOUTH OF BUTLER...MOVING EAST AT 80 MPH.

LOCATIONS IMPACTED INCLUDE...
  TOXEY...              PENNINGTON...         NEEDHAM...
  LISMAN...             GILBERTOWN...         BUTLER...
  THOMASVILLE...

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 3230 8811 3231 8793 3228 8794 3230 8795
      3228 8801 3218 8800 3214 8804 3208 8804
      3205 8811 3200 8810 3199 8806 3199 8772
      3201 8763 3213 8757 3188 8761 3187 8847
      3211 8844
TIME...MOT...LOC 0010Z 271DEG 69KT 3234 8787 3201 8799
          3188 8816

$$

157 
WWUS54 KMOB 260031
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
631 PM CST TUE DEC 25 2012

ALC023-025-131-260045-
/O.CON.KMOB.SV.W.0228.000000T0000Z-121226T0045Z/
CHOCTAW AL-WILCOX AL-CLARKE AL-
631 PM CST TUE DEC 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CST
FOR NORTHWESTERN CLARKE...WEST CENTRAL WILCOX AND NORTHEASTERN
CHOCTAW COUNTIES...

AT 626 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 6 MILES NORTHWEST OF LINDEN TO 14 MILES EAST OF
BUTLER TO 14 MILES SOUTH OF BUTLER...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PENNINGTON...         THOMASVILLE...

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 3190 8824 3208 8810 3228 8815 3230 8811
      3231 8793 3228 8794 3230 8795 3228 8801
      3218 8800 3214 8804 3208 8804 3205 8811
      3200 8810 3199 8806 3199 8772 3201 8763
      3213 8757 3188 8761
TIME...MOT...LOC 0031Z 272DEG 38KT 3234 8782 3201 8794
          3188 8811

$$

320 
WWUS54 KMOB 260043
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
643 PM CST TUE DEC 25 2012

ALC023-025-131-260052-
/O.EXP.KMOB.SV.W.0228.000000T0000Z-121226T0045Z/
CHOCTAW AL-WILCOX AL-CLARKE AL-
643 PM CST TUE DEC 25 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR 
NORTHWESTERN CLARKE...EXTREME NORTHWESTERN WILCOX AND NORTHEASTERN 
CHOCTAW COUNTIES...

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN WILCOX COUNTY...

AT 640 PM CST...THE LINE OF STORMS THAT PROMPTED THE WARNING FOR 
NORTHWESTERN CLARKE...WEST CENTRAL WILCOX AND NORTHEASTERN CHOCTAW 
COUNTIES HAS MOVED OUT OF THE COUNTY...THUS THE SEVERE THUNDERSTORM 
WARNING WILL BE ALLOWED TO EXPIRE AT 645 PM CST.

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 3190 8824 3208 8810 3228 8815 3230 8811
      3231 8793 3228 8794 3230 8795 3228 8801
      3218 8800 3214 8804 3208 8804 3205 8811
      3200 8810 3199 8806 3199 8772 3201 8763
      3213 8757 3188 8761
TIME...MOT...LOC 0042Z 272DEG 38KT 3234 8768 3201 8780
          3188 8797

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 24, 9:38 PM CST	Small Craft Advisory	MOB		20 hr
Dec 25, 4:41 AM CST	Gale Warning	MOB		31 hr
Dec 25, 4:41 AM CST	Small Craft Advisory	MOB		13 hr
Dec 25, 4:41 AM CST	Small Craft Advisory	MOB		42 hr
Dec 25, 4:41 AM CST	Small Craft Advisory	MOB		42 hr
Dec 25, 2:01 PM CST	Special Marine Warning	MOB		62 min
Dec 25, 2:43 PM CST	Tornado Warning	MOB	Clarke	32 min
Dec 25, 2:55 PM CST	Tornado Warning	MOB	Clarke, Monroe	65 min
Dec 25, 3:14 PM CST	Special Marine Warning	MOB		61 min
Dec 25, 3:35 PM CST	Tornado Warning	MOB	Covington, Crenshaw	55 min
Dec 25, 4:07 PM CST	Tornado Warning	MOB	Clarke, Monroe, Wilcox	68 min
Dec 25, 4:12 PM CST	Tornado Warning	MOB	Mobile	33 min
Dec 25, 4:13 PM CST	Special Marine Warning	MOB		17 min
Dec 25, 4:17 PM CST	Tornado Warning	MOB	Clarke, Mobile, Washington	10 min
Dec 25, 4:24 PM CST	Tornado Warning	MOB	Crenshaw	51 min
Dec 25, 4:24 PM CST	Tornado Warning	MOB	Choctaw	66 min
Dec 25, 4:28 PM CST	Tornado Warning	MOB	Wilcox	17 min
Dec 25, 4:39 PM CST	Tornado Warning	MOB	Conecuh, Escambia, Monroe	51 min
Dec 25, 4:41 PM CST	Tornado Warning	MOB	Conecuh, Escambia	49 min
Dec 25, 4:44 PM CST	Tornado Warning Emergency	MOB	Baldwin, Mobile	61 min
Dec 25, 4:47 PM CST	Special Marine Warning	MOB		43 min
Dec 25, 4:50 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Mobile, Washington	55 min
Dec 25, 4:52 PM CST	Tornado Warning	MOB	Choctaw, Clarke, Washington	53 min
Dec 25, 4:52 PM CST	Tornado Warning	MOB	Crenshaw	38 min
Dec 25, 5:00 PM CST	Tornado Warning	MOB	Mobile, Washington	45 min
Dec 25, 5:08 PM CST	Tornado Warning	MOB	Crenshaw	45 min
Dec 25, 5:08 PM CST	Tornado Warning	MOB	Wilcox	52 min
Dec 25, 5:13 PM CST	Tornado Warning	MOB	Covington	18 min
Dec 25, 5:16 PM CST	Tornado Warning	MOB	Baldwin, Clarke, Mobile, Monroe	44 min
Dec 25, 5:17 PM CST	Tornado Warning	MOB	Clarke, Washington	58 min
Dec 25, 5:23 PM CST	Tornado Warning	MOB	Monroe, Wilcox	23 min
Dec 25, 5:28 PM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Mobile, Washington	62 min
Dec 25, 5:44 PM CST	Tornado Warning	MOB	Clarke, Wilcox	46 min
Dec 25, 5:56 PM CST	Tornado Warning	MOB	Clarke, Washington	64 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.