Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 120, NWS Birmingham, AL

April 27, 20115 counties in Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2011, 6:20 PM CDT for 5 counties in Alabama. It was in force for 55 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: Apr 27, 2011, 6:20 PM CDT (23:20 UTC)
Expired: Apr 27, 2011, 7:15 PM CDT
In force: 55 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Bibb County, AL, Chilton County, AL, Greene County, AL, Hale County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 89 km from the middle of the area, began a volume at 23:23 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.

What was reported inside it

Time	Report	Where	Remark
Apr 27, 6:50 PM CDT	TORNADO 1	2 Wsw Wateroak, AL	AN EF-1 TORNADO TOUCHED DOWN 2 MILES SOUTHWEST OF WATEROAK IN HALE COUNTY AND PROCEEDED NORTHEAST INTO THE TALLADEGA NATIONAL FOREST ENDING IN SOUTHWEST BIBB COUNTY 2 MILES SOUTHWEST OF MERTZ. 1 MOBILE HOME AND 1 BUSINESS WERE DAMAGED OR DESTROYED ALONG WITH N

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.

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, 11.3 hours before the alert went out and 89 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.

572 
WFUS54 KBMX 272320
TORBMX
ALC007-021-063-065-105-280015-
/O.NEW.KBMX.TO.W.0120.110427T2320Z-110428T0015Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  BIBB COUNTY IN CENTRAL ALABAMA...
  WEST CENTRAL CHILTON COUNTY IN CENTRAL ALABAMA...
  SOUTHEASTERN GREENE COUNTY IN WEST CENTRAL ALABAMA...
  CENTRAL HALE COUNTY IN WEST CENTRAL ALABAMA...
  NORTHERN PERRY COUNTY IN CENTRAL ALABAMA...

* UNTIL 715 PM CDT

* AT 618 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR FORKLAND...OR 11 MILES NORTH OF DEMOPOLIS...AND
  MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GREENSBORO...BRENT...CENTREVILLE...SAWYERVILLE...GREENSBORO
  MUNICIPAL AIRPORT...MERTZ...LOW GAP...HARRISBURG...EOLINE AND WEST
  CENTREVILLE.

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 3301 8738 3301 8732 3305 8731 3316 8713
      3277 8687 3254 8787 3260 8789 3261 8787
      3259 8785 3260 8784 3262 8785 3263 8792
      3268 8796
TIME...MOT...LOC 2320Z 239DEG 42KT 3268 8779

$$

17

2 follow-up statements

281 
WWUS54 KBMX 272334
SVSBMX

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

ALC063-272344-
/O.CAN.KBMX.TO.W.0120.000000T0000Z-110428T0015Z/
GREENE AL-
634 PM CDT WED APR 27 2011

...THE TORNADO WARNING FOR SOUTHEASTERN GREENE 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 3301 8738 3301 8732 3306 8730 3316 8713
      3277 8687 3258 8768 3267 8776 3277 8781
TIME...MOT...LOC 2334Z 233DEG 49KT 3275 8768

$$

ALC007-021-065-105-280015-
/O.CON.KBMX.TO.W.0120.000000T0000Z-110428T0015Z/
PERRY AL-HALE AL-CHILTON AL-BIBB AL-
634 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR BIBB...WEST CENTRAL
CHILTON...CENTRAL HALE AND NORTHERN PERRY COUNTIES UNTIL 715 PM
CDT...

AT 632 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR SAWYERVILLE...OR 7 MILES WEST OF GREENSBORO...
MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  GREENSBORO...BRENT...CENTREVILLE...MERTZ...LOW GAP...HARRISBURG...
  EOLINE...WEST CENTREVILLE...TALLADEGA NATIONAL FOREST AND WEST
  BLOCTON.

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

LAT...LON 3301 8738 3301 8732 3306 8730 3316 8713
      3277 8687 3258 8768 3267 8776 3277 8781
TIME...MOT...LOC 2334Z 233DEG 49KT 3275 8768

$$

17

233 
WWUS54 KBMX 272354
SVSBMX

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

ALC007-021-065-105-280015-
/O.CON.KBMX.TO.W.0120.000000T0000Z-110428T0015Z/
PERRY AL-HALE AL-CHILTON AL-BIBB AL-
654 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR BIBB...WEST CENTRAL
CHILTON...EAST CENTRAL HALE AND NORTHERN PERRY COUNTIES UNTIL 715 PM
CDT...

AT 650 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 9 MILES SOUTHWEST OF MERTZ...OR 11 MILES NORTHEAST
OF GREENSBORO...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  BRENT...CENTREVILLE...MERTZ...LOW GAP...HARRISBURG...EOLINE...WEST
  CENTREVILLE...WEST BLOCTON...TALLADEGA NATIONAL FOREST AND LAWLEY.

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

LAT...LON 3290 8758 3301 8738 3301 8732 3306 8730
      3316 8713 3277 8687 3274 8747 3277 8760
TIME...MOT...LOC 2354Z 240DEG 42KT 3286 8746

$$

17

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, 4:31 PM CDT	Tornado Warning	BMX	Pickens, Tuscaloosa	20 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, 6:33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.