Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 107, NWS Birmingham, AL

April 27, 2011Pickens County, Tuscaloosa County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2011, 4:31 PM CDT for Pickens County, Tuscaloosa County, Alabama. It was in force for 20 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: Apr 27, 2011, 4:31 PM CDT (21:31 UTC)
Expired: Apr 27, 2011, 4:51 PM CDT
In force: 20 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Pickens County, AL, Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 77 km from the middle of the area, began a volume at 21:33 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
Apr 27, 1:42 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.5 hours before the alert went out and 76 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -359 m²/s²
0-3 km storm-relative helicity: -197 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

903 
WFUS54 KBMX 272131
TORBMX
ALC107-125-272230-
/O.NEW.KBMX.TO.W.0107.110427T2131Z-110427T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
431 PM CDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL PICKENS COUNTY IN WEST CENTRAL ALABAMA...
  NORTHERN TUSCALOOSA COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 530 PM CDT

* AT 428 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A
  CONFIRMED TORNADO NEAR BENEVOLA...OR 10 MILES SOUTHEAST OF
  CARROLLTON. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT
  50 MPH.

* THE TORNADO WILL BE NEAR...
  GORDO AROUND 440 PM CDT.
  LAKE LURLEEN STATE PARK AND COKER AROUND 450 PM CDT.
  LAKE TUSCALOOSA BINION CREEK LANDING AND SAMANTHA AROUND 500 PM
  CDT.
  BANKHEAD LOCK AND DAM AROUND 520 PM CDT.

OTHER LOCATIONS IMPACTED BY THE TORNADO INCLUDE ELROD...BUHL...
ECHOLA...BROWNVILLE...LAKE TUSCALOOSA TIERCE PATTTON BRIDGE...LAKE
TUSCALOOSA HWY 69 BRIDGE...NORTHSIDE...WINDHAM SPRINGS...WILEY AND
WHITSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

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

LAT...LON 3353 8771 3353 8767 3357 8767 3360 8762
      3361 8737 3359 8737 3359 8732 3352 8732
      3351 8725 3349 8728 3350 8732 3347 8734
      3342 8725 3335 8719 3310 8783 3316 8785
      3309 8800 3320 8808
TIME...MOT...LOC 2130Z 232DEG 44KT 3316 8796

$$

27

1 follow-up statement

337 
WWUS54 KBMX 272151
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
451 PM CDT WED APR 27 2011

ALC107-125-272201-
/O.CAN.KBMX.TO.W.0107.000000T0000Z-110427T2230Z/
PICKENS AL-TUSCALOOSA AL-
451 PM CDT WED APR 27 2011

...THE TORNADO WARNING FOR NORTHERN TUSCALOOSA AND EAST CENTRAL
PICKENS 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.

REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN 
TUSCALOOSA COUNTY UNTIL 545 PM CDT.

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

LAT...LON 3353 8771 3353 8767 3357 8767 3360 8762
      3361 8737 3359 8737 3359 8732 3352 8732
      3351 8725 3349 8728 3350 8732 3347 8734
      3342 8725 3335 8719 3310 8783 3316 8785
      3309 8800 3320 8808
TIME...MOT...LOC 2151Z 232DEG 44KT 3332 8772

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 3:37 AM CDT	Tornado Warning	BMX	Lamar, Pickens	38 min
Apr 27, 3:45 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	45 min
Apr 27, 3:59 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Lamar, Pickens, Sumter	46 min
Apr 27, 4:13 AM CDT	Tornado Warning	BMX	Pickens	32 min
Apr 27, 4:14 AM CDT	Tornado Warning	BMX	Greene, Pickens, Sumter	31 min
Apr 27, 4:19 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	41 min
Apr 27, 4:26 AM CDT	Tornado Warning	BMX	Marion	34 min
Apr 27, 4:28 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Marengo, Sumter	47 min
Apr 27, 4:33 AM CDT	Tornado Warning	BMX	Fayette, Pickens, Tuscaloosa	27 min
Apr 27, 4:40 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Greene, Hale, Lamar, Pickens, Tuscaloosa	50 min
Apr 27, 4:44 AM CDT	Tornado Warning	BMX	Pickens, Tuscaloosa	31 min
Apr 27, 5:07 AM CDT	Tornado Warning	BMX	Fayette, Walker	38 min
Apr 27, 5:11 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Blount, Fayette, Hale, Jefferson, Shelby and 2 more	49 min
Apr 27, 5:14 AM CDT	Tornado Warning	BMX	Jefferson, Tuscaloosa, Walker	31 min
Apr 27, 5:29 AM CDT	Tornado Warning	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	31 min
Apr 27, 5:44 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Dallas, Perry, Shelby	46 min
Apr 27, 5:52 AM CDT	Severe Thunderstorm Warning	BMX	Blount, Chilton, Etowah, Jefferson, St. Clair, Shelby and 1 more	53 min
Apr 27, 6:02 AM CDT	Special Weather Statement	BMX	Autauga, Chilton, Dallas	43 min
Apr 27, 6:21 AM CDT	Severe Thunderstorm Warning	BMX	Blount, Calhoun, Cherokee, Clay, Cleburne, Coosa and 3 more	39 min
Apr 27, 6:49 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Cleburne, Etowah, Randolph and 1 more	56 min
Apr 27, 8:05 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	25 min
Apr 27, 8:20 AM CDT	Severe Thunderstorm Warning	BMX	Marion	25 min
Apr 27, 10:04 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	41 min
Apr 27, 10:42 AM CDT	Special Weather Statement	BMX	Lamar, Marion, Winston	48 min
Apr 27, 10:51 AM CDT	Areal Flood Advisory	BMX	Marion	54 min
Apr 27, 12:08 PM CDT	Areal Flood Advisory	BMX	Marion, Winston	112 min
Apr 27, 2:09 PM CDT	Tornado Warning	BMX	Walker, Winston	31 min
Apr 27, 2:17 PM CDT	Areal Flood Advisory	BMX	Marion, Winston	118 min
Apr 27, 2:51 PM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	19 hr
Apr 27, 2:51 PM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	6 hr
Apr 27, 2:59 PM CDT	Tornado Warning	BMX	Lamar, Marion	46 min
Apr 27, 3:15 PM CDT	Tornado Warning Emergency	BMX	Pickens, Tuscaloosa	60 min
Apr 27, 3:21 PM CDT	Tornado Warning	BMX	Lamar, Marion	54 min
Apr 27, 3:38 PM CDT	Tornado Warning Emergency	BMX	Greene, Hale, Pickens, Sumter, Tuscaloosa	67 min
Apr 27, 3:56 PM CDT	Tornado Warning	BMX	Marion	34 min
Apr 27, 3:57 PM CDT	Flash Flood Warning	BMX	Marion, Winston	3 hr
Apr 27, 4:00 PM CDT	Tornado Warning Emergency	BMX	Fayette, Pickens, Tuscaloosa, Walker	60 min
Apr 27, 4:44 PM CDT	Tornado Warning	BMX	Fayette, Lamar, Marion	61 min
Apr 27, 4:47 PM CDT	Tornado Warning Emergency	BMX	Greene, Pickens, Tuscaloosa	58 min
Apr 27, 4:50 PM CDT	Tornado Warning	BMX	Greene, Hale, Sumter	55 min
Apr 27, 4:55 PM CDT	Tornado Warning Emergency	BMX	Blount, Jefferson, Walker	65 min
Apr 27, 5:22 PM CDT	Tornado Warning	BMX	Fayette, Lamar	68 min
Apr 27, 5:28 PM CDT	Tornado Warning	BMX	Marion, Winston	30 min
Apr 27, 5:31 PM CDT	Tornado Warning Emergency	BMX	Jefferson, Shelby, Tuscaloosa	59 min
Apr 27, 5:38 PM CDT	Tornado Warning Emergency	BMX	Bibb, Greene, Hale, Perry, Tuscaloosa	67 min
Apr 27, 5:39 PM CDT	Tornado Warning	BMX	Blount	21 min
Apr 27, 6:06 PM CDT	Tornado Warning	BMX	Greene, Marengo, Sumter	16 min
Apr 27, 6:14 PM CDT	Tornado Warning	BMX	Fayette, Marion, Walker, Winston	61 min
Apr 27, 6:17 PM CDT	Areal Flood Advisory	BMX	Jefferson	118 min
Apr 27, 6:18 PM CDT	Tornado Warning	BMX	Blount, Jefferson, St. Clair	57 min
Apr 27, 6:20 PM CDT	Tornado Warning	BMX	Bibb, Chilton, Greene, Hale, Perry	55 min
Apr 27, 6:33 PM CDT	Areal Flood Warning	BMX	Marion, Winston	3 hr
Apr 27, 6:35 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	40 min
Apr 27, 6:39 PM CDT	Flash Flood Warning	BMX	Blount, Jefferson, St. Clair	3 hr
Apr 27, 6:39 PM CDT	Tornado Warning Emergency	BMX	Bibb, Chilton, Shelby, Talladega	66 min
Apr 27, 6:49 PM CDT	Tornado Warning Emergency	BMX	Blount, Calhoun, Etowah, St. Clair	56 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.