Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 104, NWS Mobile, AL

December 20, 2012Covington County, Alabama; Okaloosa County, Florida

NWS Mobile, AL issued this tornado warning at Dec 20, 2012, 9:25 AM CST for Covington County, Alabama; Okaloosa County, Florida. It was in force for 55 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 20, 2012, 9:25 AM CST (15:25 UTC)
Expired: Dec 20, 2012, 10:20 AM CST
In force: 55 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Covington County, AL, Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 75 km from the middle of the area, began a volume at 15:28 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 20, 4:23 AM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.4 hours before the alert went out and 221 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: 2063 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 202 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.

350 
WFUS54 KMOB 201525
TORMOB
ALC039-FLC091-201630-
/O.NEW.KMOB.TO.W.0104.121220T1525Z-121220T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
925 AM CST THU DEC 20 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  SOUTHERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 1030 AM CST

* AT 923 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 14 MILES NORTHWEST OF CRESTVIEW...OR 7 MILES
  NORTHWEST OF BAKER...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          LAUREL HILL...        SANFORD...
  OPP...                ONYCHA...             LOCKHART...
  LIBERTYVILLE...       FLORALA...            CAROLINA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3099 8638 3083 8640 3082 8678 3096 8678
      3100 8669 3119 8669 3144 8620 3100 8618
TIME...MOT...LOC 1525Z 227DEG 40KT 3091 8672

$$

5 follow-up statements

443 
WWUS54 KMOB 201546
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
946 AM CST THU DEC 20 2012

FLC091-201556-
/O.CAN.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
OKALOOSA FL-
946 AM CST THU DEC 20 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTHERN OKALOOSA
COUNTY...

AT 942 AM CST...THE STORM THAT PROMPTED THE WARNING FOR NORTHERN 
OKALOOSA COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE TORNADO 
WARNING HAS BEEN CANCELLED. A TORNADO WARNING IS STILL IN EFFECT FOR 
THE SOUTHERN PART OF OKALOOSA COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3099 8655 3102 8663 3121 8664 3144 8620
      3100 8619
TIME...MOT...LOC 1546Z 227DEG 40KT 3107 8652

$$

ALC039-201630-
/O.CON.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
COVINGTON AL-
946 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR SOUTHERN
COVINGTON COUNTY...

AT 942 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 14 MILES WEST OF FLORALA...OR 8 MILES NORTHWEST OF LAUREL
HILL...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          SANFORD...            OPP...
  ONYCHA...             LOCKHART...           LIBERTYVILLE...
  FLORALA...            CAROLINA...           BABBIE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3099 8655 3102 8663 3121 8664 3144 8620
      3100 8619
TIME...MOT...LOC 1546Z 227DEG 40KT 3107 8652

$$

860 
WWUS54 KMOB 201602
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1002 AM CST THU DEC 20 2012

ALC039-201630-
/O.CON.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
COVINGTON AL-
1002 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR EAST
CENTRAL COVINGTON COUNTY...

AT 1000 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
 WAS LOCATED 11 MILES SOUTHWEST OF OPP...OR 6 MILES SOUTHWEST OF
ONYCHA...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          OPP...                ONYCHA...
  BABBIE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3105 8639 3114 8650 3120 8645 3138 8620
      3113 8619
TIME...MOT...LOC 1602Z 227DEG 40KT 3118 8635

$$

517 
WWUS54 KMOB 201608
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1008 AM CST THU DEC 20 2012

ALC039-201630-
/O.CON.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
COVINGTON AL-
1008 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR EAST
CENTRAL COVINGTON COUNTY...

AT 1005 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
 WAS LOCATED 7 MILES SOUTHWEST OF OPP...OR 2 MILES SOUTHWEST OF
ONYCHA...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          OPP...                ONYCHA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3116 8627 3118 8635 3127 8634 3138 8620
      3120 8619
TIME...MOT...LOC 1608Z 227DEG 40KT 3122 8628

$$

866 
WWUS54 KMOB 201611
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1011 AM CST THU DEC 20 2012

ALC039-201630-
/O.CON.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
COVINGTON AL-
1011 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR EAST
CENTRAL COVINGTON COUNTY...

AT 1009 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
 WAS LOCATED 4 MILES SOUTH OF OPP...OR NEAR ONYCHA...MOVING NORTHEAST
AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  OPP...                ONYCHA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3119 8624 3119 8630 3127 8631 3138 8620
      3120 8619
TIME...MOT...LOC 1611Z 227DEG 40KT 3124 8625

$$

563 
WWUS54 KMOB 201620
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1020 AM CST THU DEC 20 2012

ALC039-201630-
/O.CAN.KMOB.TO.W.0104.000000T0000Z-121220T1630Z/
COVINGTON AL-
1020 AM CST THU DEC 20 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR EAST CENTRAL COVINGTON
COUNTY...

AT 1019 AM CST...THE STORM THAT PROMPTED THE WARNING FOR EAST CENTRAL
COVINGTON COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE TORNADO 
WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST THURSDAY FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3119 8624 3119 8630 3127 8631 3138 8620
      3120 8619
TIME...MOT...LOC 1620Z 227DEG 40KT 3131 8616

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 2:51 AM CST	Gale Warning	MOB		30 hr
Dec 20, 2:51 AM CST	Small Craft Advisory	MOB		33 hr
Dec 20, 4:11 AM CST	Tornado Warning	MOB	Mobile	64 min
Dec 20, 4:42 AM CST	Tornado Warning	MOB	Mobile	36 min
Dec 20, 4:49 AM CST	Tornado Warning	MOB	Choctaw	30 min
Dec 20, 5:14 AM CST	Tornado Warning	MOB	Baldwin	46 min
Dec 20, 5:29 AM CST	Tornado Warning	MOB	Washington	46 min
Dec 20, 5:38 AM CST	Tornado Warning	MOB	Choctaw, Clarke, Washington	52 min
Dec 20, 5:45 AM CST	Tornado Warning	MOB	Baldwin, Mobile	39 min
Dec 20, 6:03 AM CST	Tornado Warning	MOB	Clarke	28 min
Dec 20, 6:06 AM CST	Tornado Warning	MOB	Washington	22 min
Dec 20, 6:08 AM CST	Tornado Warning	MOB	Baldwin	21 min
Dec 20, 6:11 AM CST	Tornado Warning	MOB	Conecuh, Escambia, Monroe	49 min
Dec 20, 6:39 AM CST	Tornado Warning	MOB	Conecuh, Monroe	35 min
Dec 20, 6:40 AM CST	Tornado Warning	MOB	Washington	50 min
Dec 20, 6:56 AM CST	Tornado Warning	MOB	Baldwin, Mobile	34 min
Dec 20, 7:02 AM CST	Tornado Warning	MOB	Baldwin, Mobile	58 min
Dec 20, 7:06 AM CST	Special Marine Warning	MOB		84 min
Dec 20, 7:18 AM CST	Tornado Warning	MOB	Clarke, Washington	42 min
Dec 20, 7:19 AM CST	Tornado Warning	MOB	Conecuh, Escambia, Monroe	56 min
Dec 20, 7:25 AM CST	Tornado Warning	MOB	Clarke, Wilcox	50 min
Dec 20, 7:36 AM CST	Tornado Warning	MOB	Baldwin, Clarke, Monroe	42 min
Dec 20, 7:52 AM CST	Tornado Warning	MOB	Baldwin	53 min
Dec 20, 8:10 AM CST	Tornado Warning	MOB	Wilcox	32 min
Dec 20, 8:14 AM CST	Tornado Warning	MOB	Conecuh, Monroe	33 min
Dec 20, 8:15 AM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke	17 min
Dec 20, 8:26 AM CST	Special Marine Warning	MOB		94 min
Dec 20, 8:27 AM CST	Tornado Warning	MOB	Escambia	63 min
Dec 20, 8:29 AM CST	Tornado Warning	MOB	Escambia	46 min
Dec 20, 9:11 AM CST	Tornado Warning	MOB	Escambia	25 min
Dec 20, 9:28 AM CST	Severe Thunderstorm Warning	MOB	Wilcox	15 min
Dec 20, 9:30 AM CST	Special Marine Warning	MOB		60 min
Dec 20, 9:49 AM CST	Severe Thunderstorm Warning	MOB	Wilcox	26 min
Dec 20, 9:50 AM CST	Tornado Warning	MOB	Covington, Crenshaw	16 min
Dec 20, 10:23 AM CST	Special Marine Warning	MOB		82 min
Dec 20, 11:34 AM CST	Special Marine Warning	MOB		61 min
Dec 20, 2:19 PM CST	Fire Weather Watch	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia, Monroe and 1 more	16 hr
Dec 20, 2:19 PM CST	Red Flag Warning	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	27 hr
Dec 20, 8:41 AM CST	Tornado Warning	MOB	Escambia, Okaloosa, Santa Rosa	64 min
Dec 20, 9:00 AM CST	Tornado Warning	MOB	Escambia, Santa Rosa	60 min
Dec 20, 9:43 AM CST	Tornado Warning	MOB	Okaloosa, Santa Rosa	62 min
Dec 20, 10:19 AM CST	Areal Flood Advisory	MOB	Escambia, Okaloosa, Santa Rosa	3 hr

Nearby

Tornado Warnings in Alabama, 2012 Tornado Warnings in Florida, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.