Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 233, NWS Mobile, AL

December 25, 20124 counties in Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Dec 25, 2012, 7:37 PM CST for 4 counties in Alabama. It was in force for 53 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, 7:37 PM CST (01:37 UTC)
Expired: Dec 25, 2012, 8:30 PM CST
In force: 53 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Clarke County, AL, Conecuh County, AL, Monroe County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 147 km from the middle of the area, began a volume at 01:41 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
Dec 25, 2:41 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.6 hours before the alert went out and 147 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: 22 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 563 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 696 m²/s²
0-3 km storm-relative helicity: 921 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

648 
WUUS54 KMOB 260137
SVRMOB
ALC025-035-099-131-260230-
/O.NEW.KMOB.SV.W.0233.121226T0137Z-121226T0230Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 830 PM CST

* AT 736 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 9 MILES NORTHEAST OF THOMASVILLE TO 11 MILES
  EAST OF GROVE HILL TO 10 MILES SOUTHEAST OF GROVE HILL...AND MOVING
  EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             PETERMAN...           YELLOW BLUFF...
  PINE HILL...          PINE APPLE...         OAK HILL...
  CATHERINE...          CAMDEN...             WHATLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 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 3221 8737 3220 8733 3205 8717 3205 8685
      3196 8685 3196 8691 3170 8690 3155 8694
      3152 8794 3154 8798 3170 8775 3186 8776
      3197 8774 3201 8763 3213 8763 3214 8753
      3227 8752 3228 8745
TIME...MOT...LOC 0137Z 267DEG 39KT 3199 8761 3174 8757
          3159 8766

$$

2 follow-up statements

490 
WWUS54 KMOB 260208
SVSMOB

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

ALC025-035-099-131-260230-
/O.CON.KMOB.SV.W.0233.000000T0000Z-121226T0230Z/
CONECUH AL-MONROE AL-WILCOX AL-CLARKE AL-
808 PM CST TUE DEC 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CST
FOR EAST CENTRAL CLARKE...WILCOX...NORTHERN MONROE AND NORTH CENTRAL
CONECUH COUNTIES...

AT 804 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 10 MILES NORTH OF CAMDEN TO 14 MILES SOUTH OF
CAMDEN TO 8 MILES WEST OF MONROEVILLE...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             PETERMAN...           PINE APPLE...
  OAK HILL...           CAMDEN...             VREDENBURGH...
  BEATRICE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3220 8735 3220 8733 3205 8717 3205 8686
      3196 8685 3196 8691 3168 8691 3155 8694
      3154 8767 3182 8752 3223 8740
TIME...MOT...LOC 0209Z 268DEG 43KT 3214 8719 3179 8727
          3157 8738

$$

745 
WWUS54 KMOB 260219
SVSMOB

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

ALC025-260229-
/O.CAN.KMOB.SV.W.0233.000000T0000Z-121226T0230Z/
CLARKE AL-
819 PM CST TUE DEC 25 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EAST
CENTRAL CLARKE COUNTY...

AT 818 PM CST...THE LINE OF STORMS THAT PROMPTED THE WARNING FOR 
EAST CENTRAL CLARKE COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE 
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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

LAT...LON 3156 8753 3179 8746 3191 8743 3208 8721
      3208 8720 3205 8717 3205 8686 3196 8685
      3196 8691 3168 8691 3155 8694
TIME...MOT...LOC 0219Z 270DEG 27KT 3214 8716 3179 8724
          3157 8735

$$

ALC035-099-131-260230-
/O.CON.KMOB.SV.W.0233.000000T0000Z-121226T0230Z/
CONECUH AL-MONROE AL-WILCOX AL-
819 PM CST TUE DEC 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CST
FOR SOUTHEASTERN WILCOX...NORTHERN MONROE AND NORTH CENTRAL CONECUH
COUNTIES...

AT 818 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 12 MILES NORTHEAST OF CAMDEN TO 14 MILES SOUTH OF
CAMDEN TO 3 MILES NORTHWEST OF MONROEVILLE...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           PINE APPLE...         OAK HILL...
  CAMDEN...             VREDENBURGH...        BEATRICE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3156 8753 3179 8746 3191 8743 3208 8721
      3208 8720 3205 8717 3205 8686 3196 8685
      3196 8691 3168 8691 3155 8694
TIME...MOT...LOC 0219Z 270DEG 27KT 3214 8716 3179 8724
          3157 8735

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 25, 6:08 PM CST	Tornado Warning	MOB	Clarke, Monroe, Wilcox	67 min
Dec 25, 6:20 PM CST	Special Marine Warning	MOB		85 min
Dec 25, 6:20 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Wilcox	55 min
Dec 25, 6:29 PM CST	Severe Thunderstorm Warning	MOB	Mobile, Washington	46 min
Dec 25, 6:38 PM CST	Coastal Flood Advisory	MOB		5 hr
Dec 25, 6:59 PM CST	Tornado Warning	MOB	Clarke, Monroe	45 min
Dec 25, 7:00 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Mobile, Monroe, Washington	60 min
Dec 25, 7:00 PM CST	Tornado Warning	MOB	Wilcox	30 min
Dec 25, 7:19 PM CST	Severe Thunderstorm Warning	MOB	Mobile	41 min
Dec 25, 7:21 PM CST	Tornado Warning	MOB	Mobile	39 min
Dec 25, 7:34 PM CST	Tornado Warning	MOB	Wilcox	26 min
Dec 25, 7:59 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe	46 min
Dec 25, 8:03 PM CST	Special Marine Warning	MOB		87 min
Dec 25, 8:11 PM CST	Tornado Warning	MOB	Baldwin, Escambia	49 min
Dec 25, 8:36 PM CST	Tornado Warning	MOB	Butler, Conecuh	39 min
Dec 25, 8:44 PM CST	Severe Thunderstorm Warning	MOB	Conecuh, Escambia, Monroe	46 min
Dec 25, 8:58 PM CST	Severe Thunderstorm Warning	MOB	Baldwin	47 min
Dec 25, 9:08 PM CST	Special Marine Warning	MOB		82 min
Dec 25, 9:09 PM CST	Tornado Warning	MOB	Butler, Crenshaw	51 min
Dec 25, 9:23 PM CST	Special Marine Warning	MOB		97 min
Dec 25, 9:29 PM CST	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Escambia	46 min
Dec 25, 9:35 PM CST	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw	70 min
Dec 25, 9:45 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Covington, Escambia	45 min
Dec 25, 10:15 PM CST	Severe Thunderstorm Warning	MOB	Covington, Crenshaw	60 min
Dec 25, 10:29 PM CST	Severe Thunderstorm Warning	MOB	Covington, Escambia	46 min
Dec 25, 10:33 PM CST	Special Marine Warning	MOB		117 min
Dec 25, 10:40 PM CST	Tornado Warning	MOB	Covington	35 min
Dec 25, 11:14 PM CST	Severe Thunderstorm Warning	MOB	Covington	26 min
Dec 26, 5:43 AM CST	Wind Advisory	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	9 hr

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.