Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 155, NWS Birmingham, AL

November 16, 2011Chilton County, Dallas County, Perry County, Alabama

NWS Birmingham, AL issued this tornado warning at Nov 16, 2011, 9:08 AM CST for Chilton County, Dallas County, Perry County, Alabama. It was in force for 37 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, 9:08 AM CST (15:08 UTC)
Expired
Nov 16, 2011, 9:45 AM CST
In force
37 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon

Counties Chilton County, AL, Dallas County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 56 km from the middle of the area, began a volume at 15:10 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.

IssuedProductOfficeLasted
Nov 16, 2:20 AM CSTTornado WatchSPC8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 3.1 hours before the alert went out and 57 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 2011-11-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 990 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-11-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.19395878Sfc1 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
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.

831 
WFUS54 KBMX 161508
TORBMX
ALC021-047-105-161545-
/O.NEW.KBMX.TO.W.0155.111116T1508Z-111116T1545Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CHILTON COUNTY IN ALABAMA...
  EXTREME NORTH CENTRAL DALLAS COUNTY IN SOUTH CENTRAL ALABAMA...
  EAST CENTRAL PERRY COUNTY IN ALABAMA...

* UNTIL 945 AM CST

* AT 908 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED 6 MILES NORTHWEST OF PAUL M GRIST STATE PARK...OR 11
  MILES NORTHWEST OF VALLEY GRANDE...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PARNELL...MAPLESVILLE...PLECHER...PLANTERSVILLE AND STANTON.

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 3271 8710 3283 8682 3267 8672 3266 8684
      3266 8692 3265 8692 3262 8708
TIME...MOT...LOC 1508Z 254DEG 32KT 3267 8704

$$

19
1 follow-up statement
662 
WWUS54 KBMX 161522
SVSBMX

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

ALC047-105-161531-
/O.CAN.KBMX.TO.W.0155.000000T0000Z-111116T1545Z/
DALLAS AL-PERRY AL-
922 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR EAST CENTRAL PERRY AND EXTREME NORTH
CENTRAL DALLAS COUNTIES 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 3269 8693 3277 8697 3283 8682 3272 8675
TIME...MOT...LOC 1521Z 248DEG 32KT 3275 8690

$$

ALC021-161545-
/O.CON.KBMX.TO.W.0155.000000T0000Z-111116T1545Z/
CHILTON AL-
922 AM CST WED NOV 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN CHILTON
COUNTY UNTIL 945 AM CST...

AT 921 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR PARNELL...OR 16 MILES NORTH OF VALLEY
GRANDE...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAPLESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

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

LAT...LON 3269 8693 3277 8697 3283 8682 3272 8675
TIME...MOT...LOC 1521Z 248DEG 32KT 3275 8690

$$

19

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 16, 2:42 AM CSTSpecial Weather StatementBMXPickens48 min
Nov 16, 2:59 AM CSTSpecial Weather StatementBMXFayette46 min
Nov 16, 3:32 AM CSTSpecial Weather StatementBMXWalker43 min
Nov 16, 5:44 AM CSTSpecial Weather StatementBMXSumter46 min
Nov 16, 6:34 AM CSTTornado WarningBMXMarengo, Sumter56 min
Nov 16, 7:57 AM CSTTornado WarningBMXHale, Marengo, Perry48 min
Nov 16, 8:35 AM CSTTornado WarningBMXPerry40 min
Nov 16, 9:31 AM CSTTornado WarningBMXJefferson, St. Clair, Shelby29 min
Nov 16, 9:46 AM CSTTornado WarningBMXChilton, Coosa44 min
Nov 16, 9:56 AM CSTTornado WarningBMXCalhoun, St. Clair, Talladega34 min
Nov 16, 10:20 AM CSTSevere Thunderstorm WarningBMXAutauga, Dallas, Elmore, Lowndes, Montgomery40 min
Nov 16, 10:25 AM CSTTornado WarningBMXCalhoun35 min
Nov 16, 10:36 AM CSTTornado WarningBMXLowndes, Montgomery24 min
Nov 16, 10:56 AM CSTTornado WarningBMXCalhoun, Cherokee, Cleburne34 min
Nov 16, 10:58 AM CSTTornado WarningBMXLowndes, Montgomery32 min
Nov 16, 10:59 AM CSTTornado WarningBMXElmore, Montgomery31 min
Nov 16, 11:21 AM CSTTornado WarningBMXElmore, Macon, Montgomery, Tallapoosa39 min
Nov 16, 11:40 AM CSTTornado WarningBMXBullock, Macon, Montgomery23 min
Nov 16, 11:48 AM CSTTornado WarningBMXChambers, Lee, Macon42 min
Nov 16, 12:18 PM CSTTornado WarningBMXChambers, Lee27 min
Nov 16, 12:25 PM CSTTornado WarningBMXBullock, Macon, Russell25 min
Nov 16, 1:34 PM CSTSpecial Weather StatementBMXBarbour41 min

Nearby

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