Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 39, NWS Birmingham, AL

December 10, 2012Macon County, Alabama

NWS Birmingham, AL issued this tornado warning at Dec 10, 2012, 1:55 PM CST for Macon County, Alabama. It was in force for 22 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Dec 10, 2012, 1:55 PM CST (19:55 UTC)
Expired
Dec 10, 2012, 2:17 PM CST
In force
22 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon

County Macon County, AL

What was reported inside it

TimeReportWhereRemark
Dec 10, 1:56 PM CSTTSTM WND DMG6 Wnw Tuskegee, ALONE TREE DOWN ACROSS HIGHWAY 49 APPROXIMATELY 1 MILE SOUTH OF THE FRANKLIN COMMUNITY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 7.9 hours before the alert went out and 121 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-12-10The 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.

020 
WFUS54 KBMX 101955
TORBMX
ALC087-102030-
/O.NEW.KBMX.TO.W.0039.121210T1955Z-121210T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
155 PM CST MON DEC 10 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN MACON COUNTY IN SOUTHEAST ALABAMA...

* UNTIL 230 PM CST

* AT 152 PM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR FRANKLIN...OR NEAR MILSTEAD...AND MOVING NORTHEAST
  AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TUSKEGEE...NOTASULGA...TUSKEGEE NATIONAL FOREST...UPHAPEE CREEK...
  MOTON FIELD MUNICIPAL AIRPORT AND I 85 REST AREA.

THIS INCLUDES...
INTERSTATE 85 EXIT NUMBERS 32 THROUGH 42...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3239 8587 3245 8589 3248 8587 3250 8585
      3249 8580 3253 8580 3258 8570 3258 8566
      3257 8566 3250 8550
TIME...MOT...LOC 1955Z 243DEG 37KT 3246 8581

$$

GRANTHAM
2 follow-up statements
548 
WWUS54 KBMX 102008
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
208 PM CST MON DEC 10 2012

ALC087-102030-
/O.CON.KBMX.TO.W.0039.000000T0000Z-121210T2030Z/
MACON AL-
208 PM CST MON DEC 10 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL MACON COUNTY
UNTIL 230 PM CST...

AT 208 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR NOTASULGA...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  NOTASULGA...TUSKEGEE NATIONAL FOREST AND I 85 REST AREA.

THIS INCLUDES...
INTERSTATE 85 EXIT NUMBERS 38 THROUGH 42...

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3244 8571 3254 8574 3257 8566 3250 8550
TIME...MOT...LOC 2008Z 243DEG 37KT 3252 8567

$$

GRANTHAM
504 
WWUS54 KBMX 102017
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
217 PM CST MON DEC 10 2012

ALC087-102027-
/O.CAN.KBMX.TO.W.0039.000000T0000Z-121210T2030Z/
MACON AL-
217 PM CST MON DEC 10 2012

...THE TORNADO WARNING FOR NORTH CENTRAL MACON COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MACON 
COUNTY UNTIL 245 PM.

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3244 8571 3254 8574 3257 8566 3250 8550
TIME...MOT...LOC 2017Z 243DEG 37KT 3256 8557

$$

GRANTHAM

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 1:55 AM CSTSpecial Weather StatementBMXFayette, Lamar, Marion, Pickens65 min
Dec 10, 4:38 AM CSTSpecial Weather StatementBMXGreene, Sumter52 min
Dec 10, 5:01 AM CSTSpecial Weather StatementBMXEtowah44 min
Dec 10, 5:42 AM CSTSpecial Weather StatementBMXCalhoun, Cherokee, Etowah48 min
Dec 10, 7:02 AM CSTSpecial Weather StatementBMXTalladega28 min
Dec 10, 8:02 AM CSTSpecial Weather StatementBMXSumter28 min
Dec 10, 8:18 AM CSTSevere Thunderstorm WarningBMXGreene, Hale, Sumter27 min
Dec 10, 8:22 AM CSTAreal Flood AdvisoryBMXGreene, Hale, Sumter3 hr
Dec 10, 8:49 AM CSTSpecial Weather StatementBMXSumter26 min
Dec 10, 9:15 AM CSTSpecial Weather StatementBMXCoosa45 min
Dec 10, 9:54 AM CSTSevere Thunderstorm WarningBMXClay, Cleburne, Randolph66 min
Dec 10, 9:59 AM CSTSpecial Weather StatementBMXDallas31 min
Dec 10, 10:05 AM CSTSevere Thunderstorm WarningBMXDallas25 min
Dec 10, 10:10 AM CSTSevere Thunderstorm WarningBMXAutauga, Lowndes35 min
Dec 10, 10:29 AM CSTSevere Thunderstorm WarningBMXDallas31 min
Dec 10, 10:47 AM CSTSpecial Weather StatementBMXElmore43 min
Dec 10, 11:06 AM CSTSpecial Weather StatementBMXMarengo24 min
Dec 10, 12:16 PM CSTSpecial Weather StatementBMXDallas44 min
Dec 10, 12:28 PM CSTSpecial Weather StatementBMXLowndes47 min
Dec 10, 1:07 PM CSTSpecial Weather StatementBMXElmore, Montgomery53 min
Dec 10, 1:13 PM CSTSevere Thunderstorm WarningBMXElmore, Lowndes, Montgomery47 min
Dec 10, 1:41 PM CSTSevere Thunderstorm WarningBMXBullock, Lee, Macon, Tallapoosa64 min
Dec 10, 2:37 PM CSTSpecial Weather StatementBMXBarbour23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.