Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 95, NWS Mobile, AL

December 20, 2012Baldwin County, Clarke County, Monroe County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 20, 2012, 7:36 AM CST for Baldwin County, Clarke County, Monroe County, Alabama. It was in force for 42 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, 7:36 AM CST (13:36 UTC)
Expired
Dec 20, 2012, 8:18 AM CST
In force
42 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Clarke County, AL, Monroe County, AL

The radar

The Mobile radar (KMOB), 104 km from the middle of the area, began a volume at 13:37 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.

IssuedProductOfficeLasted
Dec 20, 4:23 AM CSTTornado WatchSPC9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 1.6 hours before the alert went out and 211 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2012-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 574 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

452 
WFUS54 KMOB 201336
TORMOB
ALC003-025-099-201430-
/O.NEW.KMOB.TO.W.0095.121220T1336Z-121220T1430Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTH CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  SOUTHEASTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 830 AM CST

* AT 733 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 17 MILES NORTH OF BAY MINETTE...OR 12 MILES
  EAST OF CALVERT...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           URIAH...              MONROEVILLE...
  MEGARGEL...           FRISCO CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3168 8708 3123 8757 3124 8762 3119 8762
      3105 8777 3117 8793 3183 8748
TIME...MOT...LOC 1337Z 229DEG 41KT 3116 8777

$$
3 follow-up statements
191 
WWUS54 KMOB 201353
SVSMOB

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

ALC003-025-099-201430-
/O.CON.KMOB.TO.W.0095.000000T0000Z-121220T1430Z/
MONROE AL-CLARKE AL-BALDWIN AL-
753 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 AM CST FOR NORTH
CENTRAL BALDWIN...SOUTHEASTERN CLARKE AND MONROE COUNTIES...

AT 751 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 18 MILES SOUTHWEST OF FRISCO CITY...OR 8 MILES WEST OF
URIAH...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           URIAH...              MONROEVILLE...
  MEGARGEL...           FRISCO CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3168 8708 3123 8757 3124 8762 3119 8762
      3112 8769 3122 8785 3183 8748
TIME...MOT...LOC 1353Z 229DEG 41KT 3128 8761

$$
477 
WWUS54 KMOB 201402
SVSMOB

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

ALC003-025-201411-
/O.CAN.KMOB.TO.W.0095.000000T0000Z-121220T1430Z/
CLARKE AL-BALDWIN AL-
802 AM CST THU DEC 20 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL BALDWIN
AND SOUTHEASTERN CLARKE COUNTIES...

AT 800 AM CST...THE STORM THAT PROMPTED THE WARNING FOR NORTH CENTRAL
BALDWIN AND SOUTHEASTERN CLARKE 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 3168 8708 3123 8757 3132 8769 3143 8765
      3141 8760 3144 8757 3148 8757 3151 8761
      3156 8757 3163 8757 3170 8754 3170 8751
      3173 8752 3183 8748
TIME...MOT...LOC 1401Z 229DEG 41KT 3134 8753

$$

ALC099-201430-
/O.CON.KMOB.TO.W.0095.000000T0000Z-121220T1430Z/
MONROE AL-
802 AM CST THU DEC 20 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 AM CST FOR MONROE
COUNTY...

AT 800 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 11 MILES SOUTHWEST OF FRISCO CITY...OR 3 MILES NORTHWEST
OF URIAH...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           URIAH...              MONROEVILLE...
  MEGARGEL...           FRISCO CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3168 8708 3123 8757 3132 8769 3143 8765
      3141 8760 3144 8757 3148 8757 3151 8761
      3156 8757 3163 8757 3170 8754 3170 8751
      3173 8752 3183 8748
TIME...MOT...LOC 1401Z 229DEG 41KT 3134 8753

$$
827 
WWUS54 KMOB 201418
SVSMOB

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

ALC099-201427-
/O.CAN.KMOB.TO.W.0095.000000T0000Z-121220T1430Z/
MONROE AL-
818 AM CST THU DEC 20 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR MONROE COUNTY...

AT 814 AM CST...A NEW TORNADO WARNING HAS BEEN ISSUED TO REPLACE 
THIS TORNADO WARNING FOR MONROE COUNTY.

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

LAT...LON 3168 8708 3123 8757 3132 8769 3143 8765
      3141 8760 3144 8757 3148 8757 3151 8761
      3156 8757 3163 8757 3170 8754 3170 8751
      3173 8752 3183 8748
TIME...MOT...LOC 1417Z 229DEG 41KT 3146 8737

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 20, 2:51 AM CSTGale WarningMOB30 hr
Dec 20, 2:51 AM CSTSmall Craft AdvisoryMOB33 hr
Dec 20, 4:11 AM CSTTornado WarningMOBMobile64 min
Dec 20, 4:42 AM CSTTornado WarningMOBMobile36 min
Dec 20, 4:49 AM CSTTornado WarningMOBChoctaw30 min
Dec 20, 5:14 AM CSTTornado WarningMOBBaldwin46 min
Dec 20, 5:29 AM CSTTornado WarningMOBWashington46 min
Dec 20, 5:38 AM CSTTornado WarningMOBChoctaw, Clarke, Washington52 min
Dec 20, 5:45 AM CSTTornado WarningMOBBaldwin, Mobile39 min
Dec 20, 6:03 AM CSTTornado WarningMOBClarke28 min
Dec 20, 6:06 AM CSTTornado WarningMOBWashington22 min
Dec 20, 6:08 AM CSTTornado WarningMOBBaldwin21 min
Dec 20, 6:11 AM CSTTornado WarningMOBConecuh, Escambia, Monroe49 min
Dec 20, 6:39 AM CSTTornado WarningMOBConecuh, Monroe35 min
Dec 20, 6:40 AM CSTTornado WarningMOBWashington50 min
Dec 20, 6:56 AM CSTTornado WarningMOBBaldwin, Mobile34 min
Dec 20, 7:02 AM CSTTornado WarningMOBBaldwin, Mobile58 min
Dec 20, 7:06 AM CSTSpecial Marine WarningMOB84 min
Dec 20, 7:18 AM CSTTornado WarningMOBClarke, Washington42 min
Dec 20, 7:19 AM CSTTornado WarningMOBConecuh, Escambia, Monroe56 min
Dec 20, 7:25 AM CSTTornado WarningMOBClarke, Wilcox50 min
Dec 20, 7:52 AM CSTTornado WarningMOBBaldwin53 min
Dec 20, 8:10 AM CSTTornado WarningMOBWilcox32 min
Dec 20, 8:14 AM CSTTornado WarningMOBConecuh, Monroe33 min
Dec 20, 8:15 AM CSTSevere Thunderstorm WarningMOBChoctaw, Clarke17 min
Dec 20, 8:26 AM CSTSpecial Marine WarningMOB94 min
Dec 20, 8:27 AM CSTTornado WarningMOBEscambia63 min
Dec 20, 8:29 AM CSTTornado WarningMOBEscambia46 min
Dec 20, 9:11 AM CSTTornado WarningMOBEscambia25 min
Dec 20, 9:25 AM CSTTornado WarningMOBCovington55 min
Dec 20, 9:28 AM CSTSevere Thunderstorm WarningMOBWilcox15 min
Dec 20, 9:30 AM CSTSpecial Marine WarningMOB60 min
Dec 20, 9:49 AM CSTSevere Thunderstorm WarningMOBWilcox26 min
Dec 20, 9:50 AM CSTTornado WarningMOBCovington, Crenshaw16 min
Dec 20, 10:23 AM CSTSpecial Marine WarningMOB82 min
Dec 20, 11:34 AM CSTSpecial Marine WarningMOB61 min
Dec 20, 2:19 PM CSTFire Weather WatchMOBButler, Conecuh, Covington, Crenshaw, Escambia, Monroe and 1 more16 hr
Dec 20, 2:19 PM CSTRed Flag WarningMOBButler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more27 hr

Nearby

Tornado Warnings in Alabama, 2012Every tornado warning in 2012Tornadoes 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.