Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 124, NWS Birmingham, AL

April 27, 2011Calhoun County, Cherokee County, Etowah County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2011, 7:17 PM CDT for Calhoun County, Cherokee County, Etowah County, Alabama. It was in force for 43 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, 7:17 PM CDT (00:17 UTC)
Expired
Apr 27, 2011, 8:00 PM CDT
In force
43 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Emergency
Tornado emergency

Counties Calhoun County, AL, Cherokee County, AL, Etowah County, AL

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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.3 hours before the alert went out and 127 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, Peachtre/Fal Fld, GA at 00:00Z on 2011-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1215 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, Peachtre/Fal Fld, GA at 00:00Z on 2011-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
1215 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1433 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
408 m²/s²
Significant tornado parameter
1.6
Supercell composite
15.2

Open this sounding in Storm Lab

The text

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

480 
WFUS54 KBMX 280017
TORBMX
ALC015-019-055-280100-
/O.NEW.KBMX.TO.W.0124.110428T0017Z-110428T0100Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN CALHOUN COUNTY IN EAST CENTRAL ALABAMA...
  CHEROKEE COUNTY IN NORTHEAST ALABAMA...
  SOUTHEASTERN ETOWAH COUNTY IN NORTHEAST ALABAMA...

* UNTIL 800 PM CDT

* AT 713 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A
  CONFIRMED TORNADO NEAR GLENCOE...OR 6 MILES EAST OF MARKTON.
  DOPPLER RADAR SHOWED THIS TORNADO MOVING EAST AT 60 MPH.

  THIS IS A TORNADO EMERGENCY FOR COBB CITY...REAVES...ELLISVILLE 
AND SPRING GARDEN.  TAKE COVER NOW!

* THE TORNADO WILL BE NEAR...
  PIEDMONT AROUND 730 PM CDT.

OTHER LOCATIONS IMPACTED BY THE TORNADO INCLUDE ELLISVILLE AND SPRING
GARDEN.

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 3410 8541 3398 8539 3387 8579 3422 8585
      3436 8547
TIME...MOT...LOC 0017Z 248DEG 53KT 3392 8583

$$

61
3 follow-up statements
917 
WWUS54 KBMX 280030
SVSBMX

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

ALC015-019-055-280100-
/O.CON.KBMX.TO.W.0124.000000T0000Z-110428T0100Z/
CALHOUN AL-ETOWAH AL-CHEROKEE AL-
730 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CHEROKEE...SOUTHEASTERN
ETOWAH AND NORTHEASTERN CALHOUN COUNTIES UNTIL 800 PM CDT...

...TORNADO EMERGENCY CONTINUES FOR SOUTHERN CHEROKEE COUNTY...


AT 727 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CONFIRMED TORNADO.  THIS TORNADO WAS LOCATED 6 MILES NORTHWEST OF
PIEDMONT...MOVING NORTHEAST AT 60 MPH.

THIS TORNADO WILL AFFECT MAINLY RURAL AREAS OF CHEROKEE...
NORTHEASTERN CALHOUN AND SOUTHEASTERN ETOWAH COUNTIES.

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

LAT...LON 3410 8541 3398 8539 3387 8579 3422 8585
      3436 8547
TIME...MOT...LOC 0030Z 246DEG 51KT 3400 8564

$$

61
300 
WWUS54 KBMX 280037
SVSBMX

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

ALC015-055-280047-
/O.CAN.KBMX.TO.W.0124.000000T0000Z-110428T0100Z/
CALHOUN AL-ETOWAH AL-
737 PM CDT WED APR 27 2011

...THE TORNADO WARNING FOR SOUTHEASTERN ETOWAH AND NORTHEASTERN
CALHOUN 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 3410 8541 3398 8539 3395 8559 3395 8562
      3396 8563 3396 8566 3404 8571 3435 8547
TIME...MOT...LOC 0037Z 246DEG 51KT 3404 8553

$$

ALC019-280100-
/O.CON.KBMX.TO.W.0124.000000T0000Z-110428T0100Z/
CHEROKEE AL-
737 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN CHEROKEE
COUNTY UNTIL 800 PM CDT...

...TORNADO EMERGENCY CONTINUES FOR CHEROKEE COUNTY...

AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR AND STORM
SPOTTERS WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO.  THIS
TORNADO WAS LOCATED 6 MILES NORTH OF PIEDMONT...MOVING NORTHEAST AT
60 MPH.

LOCATIONS IMPACTED INCLUDE...
  HOWELLS CROSSROADS...WATERHOUSE AND FULLERTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS ON THE GROUND. TO PROTECT YOUR LIFE...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 3410 8541 3398 8539 3395 8559 3395 8562
      3396 8563 3396 8566 3404 8571 3435 8547
TIME...MOT...LOC 0037Z 246DEG 51KT 3404 8553

$$

10/ARM
948 
WWUS54 KBMX 280044
SVSBMX

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

ALC019-280100-
/O.CON.KBMX.TO.W.0124.000000T0000Z-110428T0100Z/
CHEROKEE AL-
744 PM CDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL CHEROKEE
COUNTY UNTIL 800 PM CDT...

...TORNADO EMERGENCY CONTINUES FOR SOUTHEASTERN CHEROKEE COUNTY...

AT 741 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CONFIRMED TORNADO.  THIS TORNADO WAS LOCATED 8 MILES EAST OF
MOSHAT...OR 12 MILES SOUTHEAST OF CEDAR BLUFF...MOVING NORTHEAST AT
60 MPH.

LOCATIONS IMPACTED INCLUDE...
  WATERHOUSE AND FULLERTON.

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 3399 8551 3411 8558 3435 8547 3410 8541
      3398 8539
TIME...MOT...LOC 0043Z 246DEG 51KT 3409 8545

$$

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, 7:28 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, 8:17 PM CDTTornado WarningBMXDallas, Hale, Marengo, Perry58 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; the sounding from the Mesonet's radiosonde archive.