Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 154, NWS Birmingham, AL

November 16, 2011Perry County, Alabama

NWS Birmingham, AL issued this tornado warning at Nov 16, 2011, 8:35 AM CST for Perry County, Alabama. It was in force for 40 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: Nov 16, 2011, 8:35 AM CST (14:35 UTC)
Expired: Nov 16, 2011, 9:15 AM CST
In force: 40 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Perry County, AL

The radar

The Birmingham radar (KBMX), 69 km from the middle of the area, began a volume at 14:38 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
Nov 16, 2:20 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 2.6 hours before the alert went out and 70 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: 990 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

580 
WFUS54 KBMX 161435
TORBMX
ALC105-161515-
/O.NEW.KBMX.TO.W.0154.111116T1435Z-111116T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
835 AM CST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  PERRY COUNTY IN ALABAMA...

* UNTIL 915 AM CST

* AT 835 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR VALDEN...OR 6 MILES SOUTHWEST OF MARION...AND
  MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MARION...HAMBURG...RED FORD AND SPROTT.

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 3283 8714 3267 8703 3264 8705 3260 8704
      3259 8705 3248 8745 3257 8753
TIME...MOT...LOC 1435Z 246DEG 31KT 3258 8739

$$

19

2 follow-up statements

306 
WWUS54 KBMX 161456
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
856 AM CST WED NOV 16 2011

ALC105-161515-
/O.CON.KBMX.TO.W.0154.000000T0000Z-111116T1515Z/
PERRY AL-
856 AM CST WED NOV 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL PERRY COUNTY
UNTIL 915 AM CST...

AT 857 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 7 MILES EAST OF MARION...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN PERRY COUNTY.

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

LAT...LON 3260 8721 3266 8724 3280 8712 3267 8703
      3264 8705 3260 8704 3259 8705
TIME...MOT...LOC 1457Z 251DEG 36KT 3265 8714

$$

19

295 
WWUS54 KBMX 161512
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
912 AM CST WED NOV 16 2011

ALC105-161523-
/O.EXP.KBMX.TO.W.0154.000000T0000Z-111116T1515Z/
PERRY AL-
912 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR EAST CENTRAL PERRY COUNTY WILL EXPIRE AT
915 AM CST...

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

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

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

LAT...LON 3260 8721 3266 8724 3280 8712 3267 8703
      3264 8705 3260 8704 3259 8705
TIME...MOT...LOC 1513Z 251DEG 36KT 3268 8695

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 2:42 AM CST	Special Weather Statement	BMX	Pickens	48 min
Nov 16, 2:59 AM CST	Special Weather Statement	BMX	Fayette	46 min
Nov 16, 3:32 AM CST	Special Weather Statement	BMX	Walker	43 min
Nov 16, 5:44 AM CST	Special Weather Statement	BMX	Sumter	46 min
Nov 16, 6:34 AM CST	Tornado Warning	BMX	Marengo, Sumter	56 min
Nov 16, 7:57 AM CST	Tornado Warning	BMX	Hale, Marengo, Perry	48 min
Nov 16, 9:08 AM CST	Tornado Warning	BMX	Chilton, Dallas, Perry	37 min
Nov 16, 9:31 AM CST	Tornado Warning	BMX	Jefferson, St. Clair, Shelby	29 min
Nov 16, 9:46 AM CST	Tornado Warning	BMX	Chilton, Coosa	44 min
Nov 16, 9:56 AM CST	Tornado Warning	BMX	Calhoun, St. Clair, Talladega	34 min
Nov 16, 10:20 AM CST	Severe Thunderstorm Warning	BMX	Autauga, Dallas, Elmore, Lowndes, Montgomery	40 min
Nov 16, 10:25 AM CST	Tornado Warning	BMX	Calhoun	35 min
Nov 16, 10:36 AM CST	Tornado Warning	BMX	Lowndes, Montgomery	24 min
Nov 16, 10:56 AM CST	Tornado Warning	BMX	Calhoun, Cherokee, Cleburne	34 min
Nov 16, 10:58 AM CST	Tornado Warning	BMX	Lowndes, Montgomery	32 min
Nov 16, 10:59 AM CST	Tornado Warning	BMX	Elmore, Montgomery	31 min
Nov 16, 11:21 AM CST	Tornado Warning	BMX	Elmore, Macon, Montgomery, Tallapoosa	39 min
Nov 16, 11:40 AM CST	Tornado Warning	BMX	Bullock, Macon, Montgomery	23 min
Nov 16, 11:48 AM CST	Tornado Warning	BMX	Chambers, Lee, Macon	42 min
Nov 16, 12:18 PM CST	Tornado Warning	BMX	Chambers, Lee	27 min
Nov 16, 12:25 PM CST	Tornado Warning	BMX	Bullock, Macon, Russell	25 min
Nov 16, 1:34 PM CST	Special Weather Statement	BMX	Barbour	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.