Alert archive / Florida / Tornado Warnings in 2012

Tornado Warning 100, NWS Mobile, AL

December 20, 2012Okaloosa County, Santa Rosa County, Florida; Escambia County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 20, 2012, 8:29 AM CST for Okaloosa County, Santa Rosa County, Florida; Escambia County, Alabama. It was in force for 46 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, 8:29 AM CST (14:29 UTC)
Expired: Dec 20, 2012, 9:15 AM CST
In force: 46 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Escambia County, AL, Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 102 km from the middle of the area, began a volume at 14:28 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

Birmingham, AL (KBMX), launched 12:00Z, 2.5 hours before the alert went out and 237 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: 512 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 574 m²/s²
0-3 km storm-relative helicity: 705 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

510 
WFUS54 KMOB 201429
TORMOB
ALC053-FLC091-113-201515-
/O.NEW.KMOB.TO.W.0100.121220T1429Z-121220T1515Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  NORTHERN SANTA ROSA COUNTY IN NORTHWEST FLORIDA...
  EASTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 915 AM CST

* AT 824 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 9 MILES NORTHEAST OF MOLINO...OR 8 MILES SOUTH
  OF PINE LEVEL...MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHITFIELD...          PINE LEVEL...         US 29 AND CR 43...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3072 8716 3080 8726 3127 8683 3124 8677
      3119 8676 3120 8676 3119 8672 3119 8670
      3118 8670 3101 8670 3099 8668 3099 8660
TIME...MOT...LOC 1429Z 232DEG 42KT 3082 8712

$$

2 follow-up statements

172 
WWUS54 KMOB 201451
SVSMOB

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

ALC053-FLC091-113-201515-
/O.CON.KMOB.TO.W.0100.000000T0000Z-121220T1515Z/
ESCAMBIA AL-OKALOOSA FL-SANTA ROSA FL-
851 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 AM CST FOR
NORTHEASTERN SANTA ROSA...NORTHWESTERN OKALOOSA AND EASTERN ESCAMBIA
COUNTIES...

AT 847 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 11 MILES SOUTHEAST OF EAST BREWTON...OR 6 MILES NORTHEAST
OF WHITFIELD...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  US 29 AND CR 43...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3088 8695 3099 8707 3127 8683 3124 8677
      3119 8676 3120 8675 3119 8673 3119 8670
      3100 8670 3099 8668 3099 8660
TIME...MOT...LOC 1451Z 232DEG 42KT 3097 8694

$$

558 
WWUS54 KMOB 201508
SVSMOB

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

FLC091-113-201518-
/O.CAN.KMOB.TO.W.0100.000000T0000Z-121220T1515Z/
OKALOOSA FL-SANTA ROSA FL-
908 AM CST THU DEC 20 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR EXTREME NORTHEASTERN 
SANTA ROSA AND EXTREME NORTHWESTERN OKALOOSA COUNTIES...

AT 905 AM CST...THE STORM THAT PROMPTED THE WARNING FOR NORTHEASTERN 
SANTA ROSA AND NORTHWESTERN OKALOOSA COUNTIES 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 AND SOUTHEAST MISSISSIPPI.

LAT...LON 3107 8671 3103 8680 3100 8683 3107 8690
      3124 8677 3119 8676 3120 8675 3119 8673
      3119 8670
TIME...MOT...LOC 1508Z 232DEG 42KT 3111 8678

$$

ALC053-201515-
/O.CON.KMOB.TO.W.0100.000000T0000Z-121220T1515Z/
ESCAMBIA AL-
908 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 AM CST FOR
SOUTHEASTERN ESCAMBIA COUNTY...

AT 905 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 15 MILES EAST OF EAST BREWTON...OR 5 MILES SOUTH OF US 29
AND CR 43...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  US 29 AND CR 43...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3107 8671 3103 8680 3100 8683 3107 8690
      3124 8677 3119 8676 3120 8675 3119 8673
      3119 8670
TIME...MOT...LOC 1508Z 232DEG 42KT 3111 8678

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 7:52 AM CST	Tornado Warning	MOB	Escambia	53 min
Dec 20, 8:27 AM CST	Tornado Warning	MOB	Escambia, Okaloosa, Santa Rosa	63 min
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, 9:11 AM CST	Tornado Warning	MOB	Okaloosa, Santa Rosa	25 min
Dec 20, 9:25 AM CST	Tornado Warning	MOB	Okaloosa	55 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
Dec 20, 2:19 PM CST	Red Flag Warning	MOB		27 hr
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, 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, 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

Nearby

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