Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 234, NWS Mobile, AL

December 25, 20126 counties in Alabama; Escambia County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Dec 25, 2012, 7:59 PM CST for 6 counties in Alabama; Escambia County, Florida. It was in force for 46 min. 2 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, 7:59 PM CST (01:59 UTC)
Expired: Dec 25, 2012, 8:45 PM CST
In force: 46 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Baldwin County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 01:59 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, 8:35 PM CST	TSTM WND DMG	Atmore, AL	18 WHEELER OVERTURNED NEAR ATMORE
Dec 25, 8:35 PM CST	TSTM WND DMG	Freemanville, AL	DAMAGE NEAR FAST LANE GAS STATION ON JACK SPRINGS ROAD 1/2 MILE SOUTH OF EXIT 54 AND I-65. 18 WHEELERS OVERTURNED. HOUSE BEHIND GAS STATION ON FIRE.

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
Dec 25, 2:41 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 2.0 hours before the alert went out and 218 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.

267 
WUUS54 KMOB 260159
SVRMOB
ALC003-025-035-053-097-099-FLC033-260245-
/O.NEW.KMOB.SV.W.0234.121226T0159Z-121226T0245Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  WESTERN CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  WESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  SOUTHEASTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...
  EAST CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 845 PM CST

* AT 755 PM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE EXTENDING FROM
  10 MILES WEST OF MONROEVILLE TO 16 MILES NORTHWEST OF ATMORE TO 7  
  TO 2 MILES EAST OF CHICKASAW...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  POARCH CREEK RESERVATION...                 SATSUMA...
  SARALAND...           PRICHARD...           I65 AND US 45...
  I65 AND US 43...      I65 AND I165...       I65 AND AL 158...
  CREOLA...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 7 AND 76.

LAT...LON 3073 8814 3097 8808 3106 8788 3137 8782
      3146 8775 3155 8775 3156 8692 3131 8721
      3109 8727 3087 8743 3071 8743
TIME...MOT...LOC 0158Z 267DEG 35KT 3158 8744 3126 8768
          3112 8770 3098 8780 3088 8799 3077 8801

$$

1 follow-up statement

119 
WWUS54 KMOB 260223
SVSMOB

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

ALC025-097-260232-
/O.CAN.KMOB.SV.W.0234.000000T0000Z-121226T0245Z/
CLARKE AL-MOBILE AL-
823 PM CST TUE DEC 25 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EAST
CENTRAL MOBILE AND SOUTHEASTERN CLARKE COUNTIES...

AT 818 PM CST...THE LINE OF SEVERE THUNDERSTORMS THAT PROMPTED THE 
WARNING FOR EAST CENTRAL MOBILE AND SOUTHEASTERN CLARKE COUNTIES 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 3072 8793 3095 8783 3108 8780 3130 8766
      3140 8758 3155 8748 3156 8692 3131 8721
      3109 8727 3087 8743 3071 8743
TIME...MOT...LOC 0222Z 268DEG 32KT 3155 8724 3121 8753
          3103 8749 3096 8762 3084 8777 3073 8779

$$

ALC003-035-053-099-FLC033-260245-
/O.CON.KMOB.SV.W.0234.000000T0000Z-121226T0245Z/
CONECUH AL-ESCAMBIA AL-MONROE AL-ESCAMBIA FL-BALDWIN AL-
823 PM CST TUE DEC 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CST
FOR NORTHERN BALDWIN...NORTHWESTERN ESCAMBIA...SOUTHERN MONROE...
WESTERN ESCAMBIA AND WESTERN 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 3 MILES NORTHEAST OF MONROEVILLE TO 14 MILES
NORTH OF ATMORE TO 2 MILES WEST OF ATMORE TO 9 MILES NORTHEAST OF BAY
MINETTE TO 4 MILES SOUTHWEST OF BAY MINETTE TO 6 MILES NORTHEAST OF
SPANISH FORT...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  POARCH CREEK RESERVATION...                 STAPLETON...
  I65 AND CR 47...      I65 AND AL 59...      I65 AND AL 287...
  BAY MINETTE...        URIAH...              MONROEVILLE...
  MEGARGEL...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 34 AND 76.

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 3072 8793 3095 8783 3108 8780 3130 8766
      3140 8758 3155 8748 3156 8692 3131 8721
      3109 8727 3087 8743 3071 8743
TIME...MOT...LOC 0222Z 268DEG 32KT 3155 8724 3121 8753
          3103 8749 3096 8762 3084 8777 3073 8779

$$

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, 7:37 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Conecuh, Monroe, Wilcox	53 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 Severe Thunderstorm Warnings in Florida, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.