Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 75, NWS Mobile, AL

December 10, 2012Clarke County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 10, 2012, 10:58 AM CST for Clarke County, Alabama. It was in force for 41 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 10, 2012, 10:58 AM CST (16:58 UTC)
Expired
Dec 10, 2012, 11:39 AM CST
In force
41 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Clarke County, AL

The radar

The Mobile radar (KMOB), 110 km from the middle of the area, began a volume at 17:02 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 10, 8:51 AM CSTTornado WatchSPC6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.0 hours before the alert went out and 203 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 2012-12-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 385 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-12-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 218 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
385 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
531 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
218 m²/s²
0-3 km storm-relative helicity
254 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

560 
WFUS54 KMOB 101658
TORMOB
ALC025-101800-
/O.NEW.KMOB.TO.W.0075.121210T1658Z-121210T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1058 AM CST MON DEC 10 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL NOON CST

* AT 1053 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 11 MILES NORTHEAST OF CHATOM...OR 8 MILES EAST
  OF MILLRY...MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHATLEY...            GROVE HILL...         FULTON...
  COFFEEVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3159 8759 3153 8794 3154 8799 3157 8804
      3158 8802 3158 8805 3166 8809 3166 8808
      3175 8810 3193 8774
TIME...MOT...LOC 1658Z 255DEG 35KT 3162 8812

$$
2 follow-up statements
746 
WWUS54 KMOB 101724
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1124 AM CST MON DEC 10 2012

ALC025-101800-
/O.CON.KMOB.TO.W.0075.000000T0000Z-121210T1800Z/
CLARKE AL-
1124 AM CST MON DEC 10 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON CST FOR CENTRAL
CLARKE COUNTY...

AT 1120 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
 WAS LOCATED 6 MILES WEST OF GROVE HILL...OR 10 MILES WEST OF
WHATLEY...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  WHATLEY...            THOMASVILLE...        GROVE HILL...
  FULTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3159 8759 3155 8792 3157 8794 3161 8794
      3163 8794 3170 8792 3175 8794 3184 8792
      3193 8774
TIME...MOT...LOC 1724Z 255DEG 35KT 3169 8783

$$
579 
WWUS54 KMOB 101739
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1139 AM CST MON DEC 10 2012

ALC025-101749-
/O.CAN.KMOB.TO.W.0075.000000T0000Z-121210T1800Z/
CLARKE AL-
1139 AM CST MON DEC 10 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR CENTRAL CLARKE
COUNTY...

AT 1138 AM CST...THE STORM THAT PROMPTED THE WARNING FOR CENTRAL
CLARKE COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE TORNADO WARNING
HAS BEEN CANCELLED.

ALTHOUGH THIS WARNING HAS BEEN CANCELLED...ADDITIONAL STORMS MAY
DEVELOP REQUIRING NEW WARNINGS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3159 8759 3155 8792 3157 8794 3161 8794
      3163 8794 3170 8792 3175 8794 3184 8792
      3193 8774
TIME...MOT...LOC 1739Z 255DEG 35KT 3173 8766

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 3:51 AM CSTSmall Craft AdvisoryMOB29 hr
Dec 10, 9:43 AM CSTSpecial Marine WarningMOB2 hr
Dec 10, 9:53 AM CSTSevere Thunderstorm WarningMOBChoctaw52 min
Dec 10, 10:03 AM CSTTornado WarningMOBBaldwin42 min
Dec 10, 10:31 AM CSTSevere Thunderstorm WarningMOBWashington49 min
Dec 10, 10:36 AM CSTTornado WarningMOBChoctaw, Washington40 min
Dec 10, 10:37 AM CSTTornado WarningMOBBaldwin38 min
Dec 10, 11:32 AM CSTSevere Thunderstorm WarningMOBMobile, Washington42 min
Dec 10, 11:36 AM CSTSevere Thunderstorm WarningMOBClarke, Monroe, Wilcox54 min
Dec 10, 12:09 PM CSTSevere Thunderstorm WarningMOBBaldwin, Clarke, Monroe47 min
Dec 10, 12:18 PM CSTSevere Thunderstorm WarningMOBButler, Monroe, Wilcox42 min
Dec 10, 12:30 PM CSTSevere Thunderstorm WarningMOBClarke, Conecuh, Monroe28 min
Dec 10, 12:32 PM CSTSevere Thunderstorm WarningMOBButler, Wilcox29 min
Dec 10, 12:37 PM CSTSpecial Marine WarningMOB92 min

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.