Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 170, NWS Birmingham, AL

December 22, 20114 counties in Alabama

NWS Birmingham, AL issued this tornado warning at Dec 22, 2011, 11:51 AM CST for 4 counties in Alabama. It was in force for 15 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 22, 2011, 11:51 AM CST (17:51 UTC)
Expired: Dec 22, 2011, 12:06 PM CST
In force: 15 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Greene County, AL, Hale County, AL, Marengo County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 102 km from the middle of the area, began a volume at 17:53 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 22, 10:00 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.9 hours before the alert went out and 102 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

071 
WFUS54 KBMX 221751
TORBMX
ALC063-065-091-105-221830-
/O.NEW.KBMX.TO.W.0170.111222T1751Z-111222T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1151 AM CST THU DEC 22 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN GREENE COUNTY IN WEST CENTRAL ALABAMA...
  SOUTHERN HALE COUNTY IN WEST CENTRAL ALABAMA...
  NORTH CENTRAL MARENGO COUNTY IN SOUTHWEST ALABAMA...
  NORTHERN PERRY COUNTY IN ALABAMA...

* UNTIL 1230 PM CST

* AT 1151 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR DEMOPOLIS...AND MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GREENSBORO...ARCOLA...DUFFYS BEND...GREENSBORO MUNICIPAL AIRPORT...
  NEWBERN...BIRDINE...GALLION...LANEVILLE...CEDARVILLE AND FOLSOM.

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 3252 8791 3252 8784 3253 8786 3259 8790
      3261 8787 3259 8786 3260 8784 3263 8786
      3297 8742 3287 8741 3287 8732 3283 8731
      3283 8714 3274 8711 3238 8785 3249 8795
TIME...MOT...LOC 1751Z 232DEG 44KT 3251 8783

$$

27

2 follow-up statements

623 
WWUS54 KBMX 221801
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1201 PM CST THU DEC 22 2011

ALC091-221811-
/O.CAN.KBMX.TO.W.0170.000000T0000Z-111222T1830Z/
MARENGO AL-
1201 PM CST THU DEC 22 2011

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

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

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

LAT...LON 3261 8788 3260 8785 3263 8786 3297 8742
      3287 8741 3287 8732 3283 8731 3283 8714
      3275 8711 3248 8764 3249 8772 3252 8773
      3252 8779 3259 8789
TIME...MOT...LOC 1801Z 232DEG 44KT 3258 8771

$$

ALC063-065-105-221830-
/O.CON.KBMX.TO.W.0170.000000T0000Z-111222T1830Z/
GREENE AL-HALE AL-PERRY AL-
1201 PM CST THU DEC 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN PERRY...SOUTHERN
HALE AND SOUTHEASTERN GREENE COUNTIES UNTIL 1230 PM CST...

AT 1201 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR ARCOLA...OR 5 MILES NORTHEAST OF DEMOPOLIS...
MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENSBORO...DUFFYS BEND...GREENSBORO MUNICIPAL AIRPORT...
  NEWBERN...LANEVILLE...CEDARVILLE...FOLSOM...MORGAN SPRINGS...
  WATEROAK AND ELLARDS.

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

LAT...LON 3261 8788 3260 8785 3263 8786 3297 8742
      3287 8741 3287 8732 3283 8731 3283 8714
      3275 8711 3248 8764 3249 8772 3252 8773
      3252 8779 3259 8789
TIME...MOT...LOC 1801Z 232DEG 44KT 3258 8771

$$

27

738 
WWUS54 KBMX 221806
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1206 PM CST THU DEC 22 2011

ALC063-065-105-221816-
/O.CAN.KBMX.TO.W.0170.000000T0000Z-111222T1830Z/
GREENE AL-HALE AL-PERRY AL-
1206 PM CST THU DEC 22 2011

...THE TORNADO WARNING FOR NORTHERN PERRY...SOUTHERN HALE AND
SOUTHEASTERN GREENE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 5 PM.

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

LAT...LON 3261 8788 3260 8785 3263 8786 3297 8742
      3287 8741 3287 8732 3283 8731 3283 8714
      3275 8711 3248 8764 3249 8772 3252 8773
      3252 8779 3259 8789
TIME...MOT...LOC 1806Z 232DEG 44KT 3217 8726

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 22, 8:49 AM CST	Flash Flood Watch	BMX	Fayette, Lamar, Marion, Pickens, Walker, Winston	7 hr
Dec 22, 9:52 AM CST	Special Weather Statement	BMX	Fayette	23 min
Dec 22, 10:13 AM CST	Flash Flood Warning	BMX	Lamar	3 hr
Dec 22, 11:47 AM CST	Tornado Warning	BMX	Greene, Hale, Tuscaloosa	25 min
Dec 22, 12:53 PM CST	Tornado Warning	BMX	Bibb, Chilton, Shelby	52 min
Dec 22, 12:59 PM CST	Tornado Warning	BMX	Bibb, Chilton, Perry, Shelby	31 min
Dec 22, 1:08 PM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	19 hr
Dec 22, 1:42 PM CST	Severe Thunderstorm Warning	BMX	Shelby, Talladega	33 min
Dec 22, 1:54 PM CST	Tornado Warning	BMX	St. Clair, Shelby, Talladega	39 min
Dec 22, 1:59 PM CST	Tornado Warning	BMX	Autauga, Coosa, Elmore, Tallapoosa	46 min
Dec 22, 2:39 PM CST	Tornado Warning	BMX	Clay, Coosa, Tallapoosa	15 min
Dec 22, 3:09 PM CST	Areal Flood Advisory	BMX	Etowah	111 min
Dec 22, 3:34 PM CST	Special Weather Statement	BMX	Pike	41 min

Nearby

Tornado Warnings in Alabama, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.