Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 131, NWS Birmingham, AL

April 27, 20114 counties in Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2011, 8:17 PM CDT for 4 counties in Alabama. It was in force for 58 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, 8:17 PM CDT (01:17 UTC)
Expired
Apr 27, 2011, 9:15 PM CDT
In force
58 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon

Counties Dallas County, AL, Hale County, AL, Marengo County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 74 km from the middle of the area, began a volume at 01:17 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

TimeReportWhereRemark
Apr 27, 8:48 PM CDTTORNADO 16 S Marion, ALTHE TORNADO TOUCHED DOWN ABOUT 1 MILE WEST OF HIGHWAY 35 ALONG COUNTY ROAD 38 WHERE IT PRODUCED SOME DAMAGE TO TREES IN A 50 YARD WIDE AREA. THE TORNADO INTENSIFIED TO EF-1 STRENGTH AS IT CROSSED HIGHWAY 45 WHERE IT WIDENED TO NEAR 200 YARDS AND THE WINDS INCR

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.

IssuedProductOfficeLasted
Apr 27, 1:42 PM CDTTornado Watch PDSSPC8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.3 hours before the alert went out and 74 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 00:00Z on 2011-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3065 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 00:00Z on 2011-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 448 square meters per square second.1939587897Sfc1 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
3065 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
448 m²/s²
0-3 km storm-relative helicity
480 m²/s²
Significant tornado parameter
9.6
Supercell composite
33.6

Open this sounding in Storm Lab

The text

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

720 
WFUS54 KBMX 280117
TORBMX
ALC047-065-091-105-280215-
/O.NEW.KBMX.TO.W.0131.110428T0117Z-110428T0215Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN DALLAS COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTH CENTRAL HALE COUNTY IN WEST CENTRAL ALABAMA...
  NORTHEASTERN MARENGO COUNTY IN SOUTHWEST ALABAMA...
  PERRY COUNTY IN CENTRAL ALABAMA...

* UNTIL 915 PM CDT

* AT 814 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR CHICKASAW STATE PARK...OR 7 MILES NORTHEAST OF
  LINDEN...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  UNIONTOWN...MARION...VALLEY GRANDE...SELMA...DAYTON...FAUNSDALE...
  NEWBERN...VALDEN...BOGUE CHITTO AND MARION JUNCTION.

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 3281 8702 3279 8701 3267 8702 3266 8697
      3242 8688 3230 8778 3246 8785
TIME...MOT...LOC 0117Z 253DEG 33KT 3240 8771

$$

17
3 follow-up statements
979 
WWUS54 KBMX 280135
SVSBMX

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

ALC047-065-091-105-280215-
/O.CON.KBMX.TO.W.0131.000000T0000Z-110428T0215Z/
MARENGO AL-DALLAS AL-PERRY AL-HALE AL-
835 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL HALE...
SOUTHERN PERRY...NORTHERN DALLAS AND NORTHEASTERN MARENGO COUNTIES
UNTIL 915 PM CDT...

AT 832 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR UNIONTOWN...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  MARION...SELMA...VALLEY GRANDE...VALDEN...MARION JUNCTION...POTTER
  STATION...PAUL M GRIST STATE PARK...HAMBURG...SUTTLE AND RED FORD.

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

LAT...LON 3281 8702 3280 8701 3267 8702 3266 8697
      3242 8689 3239 8757 3252 8762
TIME...MOT...LOC 0135Z 247DEG 37KT 3250 8749

$$

17
745 
WWUS54 KBMX 280143
SVSBMX

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

ALC065-091-280153-
/O.CAN.KBMX.TO.W.0131.000000T0000Z-110428T0215Z/
MARENGO AL-HALE AL-
843 PM CDT WED APR 27 2011

...THE TORNADO WARNING FOR SOUTH CENTRAL HALE AND NORTHEASTERN
MARENGO 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 3240 8745 3259 8747 3281 8702 3275 8701
      3268 8702 3266 8701 3266 8697 3265 8697
      3242 8689
TIME...MOT...LOC 0143Z 247DEG 37KT 3253 8740

$$

ALC047-105-280215-
/O.CON.KBMX.TO.W.0131.000000T0000Z-110428T0215Z/
DALLAS AL-PERRY AL-
843 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN PERRY AND
NORTHERN DALLAS COUNTIES UNTIL 915 PM CDT...

AT 842 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR VALDEN...OR 8 MILES NORTHEAST OF UNIONTOWN...
MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  MARION...VALLEY GRANDE...VALDEN...MARION JUNCTION...POTTER
  STATION...PAUL M GRIST STATE PARK...HAMBURG...SUTTLE...RED FORD AND
  SPROTT.

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

LAT...LON 3240 8745 3259 8747 3281 8702 3275 8701
      3268 8702 3266 8701 3266 8697 3265 8697
      3242 8689
TIME...MOT...LOC 0143Z 247DEG 37KT 3253 8740

$$

17
508 
WWUS54 KBMX 280153
SVSBMX

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

ALC047-105-280215-
/O.CON.KBMX.TO.W.0131.000000T0000Z-110428T0215Z/
DALLAS AL-PERRY AL-
853 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL PERRY AND NORTHERN
DALLAS COUNTIES UNTIL 915 PM CDT...

AT 849 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LIKELY PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR VALDEN...OR NEAR MARION...MOVING EAST AT 55
MPH.

LOCATIONS IMPACTED INCLUDE...
  VALLEY GRANDE...PAUL M GRIST STATE PARK...SUTTLE...RED FORD...
  SPROTT...SUMMERFIELD AND BARRETT CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

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

LAT...LON 3247 8734 3262 8740 3281 8702 3273 8701
      3268 8702 3266 8701 3266 8697 3252 8693
TIME...MOT...LOC 0153Z 249DEG 47KT 3258 8725

$$

03

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:07 PM CDTTornado Warning EmergencyBMXBibb, Chilton, Shelby53 min
Apr 27, 7:17 PM CDTSevere Thunderstorm WarningBMXFayette, Marion, Walker, Winston43 min
Apr 27, 7:17 PM CDTTornado Warning EmergencyBMXCalhoun, Cherokee, Etowah43 min
Apr 27, 7:28 PM CDTTornado WarningBMXHale, Marengo, Sumter62 min
Apr 27, 7:31 PM CDTTornado WarningBMXCalhoun, Cleburne, Etowah, St. Clair, Shelby, Talladega59 min
Apr 27, 7:33 PM CDTTornado WarningBMXAutauga, Coosa, Elmore, Tallapoosa57 min
Apr 27, 7:54 PM CDTTornado WarningBMXSt. Clair, Shelby, Talladega51 min
Apr 27, 8:02 PM CDTTornado WarningBMXClay, Cleburne, Coosa, Randolph, Tallapoosa58 min
Apr 27, 8:03 PM CDTTornado WarningBMXBlount15 min
Apr 27, 8:11 PM CDTSevere Thunderstorm WarningBMXGreene, Sumter64 min
Apr 27, 8:18 PM CDTTornado WarningBMXCalhoun, Cherokee, Cleburne42 min
Apr 27, 8:20 PM CDTTornado Warning EmergencyBMXChambers, Elmore, Lee, Tallapoosa55 min
Apr 27, 8:21 PM CDTTornado WarningBMXCalhoun, St. Clair, Talladega21 min
Apr 27, 9:00 PM CDTTornado Warning EmergencyBMXChambers60 min
Apr 27, 9:03 PM CDTSevere Thunderstorm WarningBMXCherokee42 min
Apr 27, 9:03 PM CDTTornado WarningBMXAutauga, Chilton, Dallas, Perry57 min
Apr 27, 9:36 PM CDTSevere Thunderstorm WarningBMXDallas, Hale, Marengo, Perry54 min
Apr 27, 9:37 PM CDTTornado WarningBMXChambers, Lee, Tallapoosa38 min
Apr 27, 9:46 PM CDTTornado WarningBMXChilton, Coosa, Tallapoosa37 min
Apr 27, 9:51 PM CDTSevere Thunderstorm WarningBMXCalhoun, Cherokee, Etowah39 min
Apr 27, 9:55 PM CDTAreal Flood AdvisoryBMXDallas, Marengo, Perry3 hr
Apr 27, 10:18 PM CDTSevere Thunderstorm WarningBMXLee27 min
Apr 27, 10:31 PM CDTTornado WarningBMXLee12 min
Apr 27, 10:39 PM CDTSevere Thunderstorm WarningBMXChambers, Clay, Coosa, Elmore, Randolph, Tallapoosa49 min
Apr 27, 11:15 PM CDTSevere Thunderstorm WarningBMXDallas, Lowndes45 min
Apr 27, 11:31 PM CDTSevere Thunderstorm WarningBMXAutauga, Elmore, Lowndes, Montgomery44 min
Apr 28, 12:01 AM CDTSevere Thunderstorm WarningBMXAutauga, Bullock, Elmore, Lee, Lowndes, Macon and 3 more49 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.