Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 116, NWS Mobile, AL

December 25, 2012Clarke County, Mobile County, Washington County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 25, 2012, 4:17 PM CST for Clarke County, Mobile County, Washington County, Alabama. It was in force for 10 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 25, 2012, 4:17 PM CST (22:17 UTC)
Expired
Dec 25, 2012, 4:27 PM CST
In force
10 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Clarke County, AL, Mobile County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 84 km from the middle of the area, began a volume at 22:17 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 25, 12:58 PM CSTTornado Watch PDSSPC9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.3 hours before the alert went out and 206 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, Slidell Radar S, LA at 12:00Z on 2012-12-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 790 joules per kilogram.LCLLFCEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2012-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.19395878Sfc1 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
790 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
576 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
1.1
Supercell composite
10.0

Open this sounding in Storm Lab

The text

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

174 
WFUS54 KMOB 252217
TORMOB
ALC025-097-129-252315-
/O.NEW.KMOB.TO.W.0116.121225T2217Z-121225T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
417 PM CST TUE DEC 25 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...
  NORTH CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...
  EASTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 515 PM CST

* AT 413 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 9 MILES SOUTH OF CITRONELLE...OR 3 MILES SOUTH
  OF GULFCREST...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOWA CHOCTAW RESERVATION...                 GULFCREST...
  CITRONELLE...         CHUNCHULA...          CALVERT...
  WHATLEY...            JACKSON...            WAGARVILLE...
  SAINT STEPHENS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI. A TORNADO WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM CST TUESDAY EVENING FOR SOUTH
CENTRAL ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3178 8797 3167 8768 3088 8815 3095 8834
TIME...MOT...LOC 2217Z 204DEG 39KT 3100 8820

$$
1 follow-up statement
689 
WWUS54 KMOB 252227
SVSMOB

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

ALC025-097-129-252237-
/O.CAN.KMOB.TO.W.0116.000000T0000Z-121225T2315Z/
WASHINGTON AL-CLARKE AL-MOBILE AL-
427 PM CST TUE DEC 25 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL MOBILE...
CENTRAL CLARKE AND EASTERN WASHINGTON COUNTIES...

AT 422 PM CST...THE STORM THAT PROMPTED THE WARNING FOR NORTH CENTRAL
MOBILE...CENTRAL CLARKE AND EASTERN WASHINGTON COUNTIES HAS WEAKENED
TO BELOW SEVERE LIMITS...THUS THE TORNADO WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI. A TORNADO WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM CST TUESDAY EVENING FOR SOUTH
CENTRAL ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3178 8797 3167 8768 3088 8815 3095 8834
TIME...MOT...LOC 2227Z 204DEG 39KT 3110 8815

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 24, 9:38 PM CSTSmall Craft AdvisoryMOB20 hr
Dec 25, 4:41 AM CSTGale WarningMOB31 hr
Dec 25, 4:41 AM CSTSmall Craft AdvisoryMOB13 hr
Dec 25, 4:41 AM CSTSmall Craft AdvisoryMOB42 hr
Dec 25, 4:41 AM CSTSmall Craft AdvisoryMOB42 hr
Dec 25, 2:01 PM CSTSpecial Marine WarningMOB62 min
Dec 25, 2:43 PM CSTTornado WarningMOBClarke32 min
Dec 25, 2:55 PM CSTTornado WarningMOBClarke, Monroe65 min
Dec 25, 3:14 PM CSTSpecial Marine WarningMOB61 min
Dec 25, 3:35 PM CSTTornado WarningMOBCovington, Crenshaw55 min
Dec 25, 4:07 PM CSTTornado WarningMOBClarke, Monroe, Wilcox68 min
Dec 25, 4:12 PM CSTTornado WarningMOBMobile33 min
Dec 25, 4:13 PM CSTSpecial Marine WarningMOB17 min
Dec 25, 4:24 PM CSTTornado WarningMOBCrenshaw51 min
Dec 25, 4:24 PM CSTTornado WarningMOBChoctaw66 min
Dec 25, 4:28 PM CSTTornado WarningMOBWilcox17 min
Dec 25, 4:39 PM CSTTornado WarningMOBConecuh, Escambia, Monroe51 min
Dec 25, 4:41 PM CSTTornado WarningMOBConecuh, Escambia49 min
Dec 25, 4:44 PM CSTTornado Warning EmergencyMOBBaldwin, Mobile61 min
Dec 25, 4:47 PM CSTSpecial Marine WarningMOB43 min
Dec 25, 4:50 PM CSTSevere Thunderstorm WarningMOBClarke, Mobile, Washington55 min
Dec 25, 4:52 PM CSTTornado WarningMOBChoctaw, Clarke, Washington53 min
Dec 25, 4:52 PM CSTTornado WarningMOBCrenshaw38 min
Dec 25, 5:00 PM CSTTornado WarningMOBMobile, Washington45 min
Dec 25, 5:08 PM CSTTornado WarningMOBCrenshaw45 min
Dec 25, 5:08 PM CSTTornado WarningMOBWilcox52 min
Dec 25, 5:13 PM CSTTornado WarningMOBCovington18 min
Dec 25, 5:16 PM CSTTornado WarningMOBBaldwin, Clarke, Mobile, Monroe44 min
Dec 25, 5:17 PM CSTTornado WarningMOBClarke, Washington58 min
Dec 25, 5:23 PM CSTTornado WarningMOBMonroe, Wilcox23 min
Dec 25, 5:28 PM CSTSevere Thunderstorm WarningMOBChoctaw, Clarke, Mobile, Washington62 min
Dec 25, 5:40 PM CSTSevere Thunderstorm WarningMOBChoctaw, Clarke, Wilcox65 min
Dec 25, 5:44 PM CSTTornado WarningMOBClarke, Wilcox46 min
Dec 25, 5:56 PM CSTTornado WarningMOBClarke, Washington64 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.