Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 137, NWS Mobile, AL

December 25, 2012Mobile County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 25, 2012, 7:21 PM CST for Mobile County, Alabama. It was in force for 39 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 25, 2012, 7:21 PM CST (01:21 UTC)
Expired: Dec 25, 2012, 8:00 PM CST
In force: 39 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 41 km from the middle of the area, began a volume at 01:22 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.

What was reported inside it

Time	Report	Where	Remark
Dec 25, 7:24 PM CST	TORNADO 1	Wilmer, AL	A FEW HOMES AND TRAILERS ARE DAMAGED IN THE NACHEZ HWY AREA OF WILMER.
Dec 25, 7:24 PM CST	TORNADO	Wilmer, AL	A FEW HOMES AND TRAILERS ARE DAMAGED IN THE NACHEZ HWY AREA OF WILMER. EXTENT OF DAMAGE UNKNOWN AT THIS TIME.
Dec 25, 7:25 PM CST	TORNADO	3 Se Wilmer, AL	LARGE TREES BLOCKING ROAD.
Dec 25, 7:40 PM CST	TSTM WND DMG	Semmes, AL	TREES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 00:00Z, 1.4 hours before the alert went out and 180 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: 1619 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 486 m²/s²
0-3 km storm-relative helicity: 466 m²/s²
Significant tornado parameter: 5.0
Supercell composite: 18.1

Open this sounding in Storm Lab

The text

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

954 
WFUS54 KMOB 260121
TORMOB
ALC097-260200-
/O.NEW.KMOB.TO.W.0137.121226T0121Z-121226T0200Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 800 PM CST

* AT 717 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 13 MILES SOUTHEAST OF LUCEDALE...OR 11 MILES
  WEST OF SEMMES...MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOVICO...             SEMMES...             SATSUMA...
  MOUNT VERNON...       I65 AND US 43...      GULFCREST...
  CREOLA...             CHUNCHULA...          CALVERT...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 15 AND 31.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
DESTRUCTIVE STRAIGHT LINE WINDS.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

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 3092 8842 3114 8815 3115 8802 3117 8799
      3115 8794 3113 8794 3110 8789 3113 8794
      3109 8798 3106 8794 3103 8796 3102 8793
      3105 8787 3102 8790 3095 8787 3093 8794
      3086 8798 3070 8841 3070 8842
TIME...MOT...LOC 0121Z 235DEG 52KT 3081 8840

$$

2 follow-up statements

584 
WWUS54 KMOB 260141
SVSMOB

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

ALC097-260200-
/O.CON.KMOB.TO.W.0137.000000T0000Z-121226T0200Z/
MOBILE AL-
741 PM CST TUE DEC 25 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CST FOR
NORTHEASTERN MOBILE COUNTY...

AT 736 PM CST...A SEVERE THUNDERSTORM WITH STRONG ROTATION AND LIKELY
PRODUCING A TORNADO WAS LOCATED 9 MILES WEST OF SARALAND...OR 4 
MILES SOUTH OF CHUNCHULA...MOVING EAST AT 50 MPH. PUBLIC REPORT OF 
DAMAGE IN WILMER FROM THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  MOVICO...             SATSUMA...            MOUNT VERNON...
  I65 AND US 43...      CREOLA...             CHUNCHULA...
  CALVERT...            BUCKS...              AXIS...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 14 AND 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

IF IN MANUFACTURED HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER.

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 3091 8827 3115 8802 3117 8799 3115 8794
      3113 8794 3110 8789 3113 8794 3109 8798
      3106 8794 3103 8796 3102 8793 3105 8787
      3102 8790 3095 8787 3093 8795 3086 8798
      3076 8823
TIME...MOT...LOC 0140Z 249DEG 42KT 3088 8817

$$

921 
WWUS54 KMOB 260152
SVSMOB

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

ALC097-260200-
/O.CON.KMOB.TO.W.0137.000000T0000Z-121226T0200Z/
MOBILE AL-
752 PM CST TUE DEC 25 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CST FOR EAST
CENTRAL MOBILE COUNTY...

AT 750 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 2 MILES NORTH OF CREOLA...OR NEAR AXIS...MOVING EAST AT
50 MPH.

LOCATIONS IMPACTED INCLUDE...
  SATSUMA...            I65 AND US 43...      CREOLA...
  AXIS...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 15 AND 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
DESTRUCTIVE STRAIGHT LINE WINDS.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

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 3093 8812 3106 8794 3103 8796 3102 8793
      3105 8787 3101 8790 3097 8788 3097 8789
      3095 8787 3093 8795 3088 8799 3086 8798
      3081 8809
TIME...MOT...LOC 0152Z 248DEG 43KT 3093 8801

$$

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, 7:34 PM CST	Tornado Warning	MOB	Wilcox	26 min
Dec 25, 7:37 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Conecuh, Monroe, Wilcox	53 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

Tornado Warnings in Alabama, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.