Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

August 8, 2012Walker County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 8, 2012, 7:45 PM CDT for Walker County, Alabama. It was in force for 30 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: Aug 8, 2012, 7:45 PM CDT (00:45 UTC)
Expired: Aug 8, 2012, 8:15 PM CDT
In force: 30 min
Issued by: NWS Birmingham, AL

County Walker County, AL

The radar

The Birmingham radar (KBMX), 79 km from the middle of the area, began a volume at 00:48 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 nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.8 hours before the alert went out and 78 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: 1690 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

788 
WWUS84 KBMX 090045
SPSBMX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
745 PM CDT WED AUG 8 2012

ALZ015-090115-
WALKER AL-
745 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR WALKER COUNTY UNTIL 815 PM CDT...

AT 744 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING TWO STRONG 
THUNDERSTORMS IN WALKER COUNTY. THE FIRST STORM WAS LOCATED 6 MILES 
SOUTHEAST OF CARBON HILL...MOVING NORTHEAST AT 5 MPH. THE SECOND 
STORM WAS LOCATED NEAR BARNEY...ALSO MOVING NORTHEAST AT 5 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CARBON HILL...
  JASPER...
  CORDOVA...
  DORA...
  SUMITON...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

&&

LAT...LON 3392 8708 3390 8710 3386 8696 3380 8696
      3377 8703 3369 8704 3363 8710 3362 8717
      3355 8719 3352 8725 3351 8731 3359 8732
      3361 8742 3369 8743 3370 8753 3386 8753
      3387 8764 3400 8764 3399 8720 3401 8717
TIME...MOT...LOC 0044Z 229DEG 6KT 3382 8746

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 9:29 AM CDT	Special Weather Statement	BMX	Tuscaloosa	46 min
Aug 9, 10:17 AM CDT	Areal Flood Advisory	BMX	Fayette, Lamar, Pickens, Tuscaloosa	3 hr
Aug 9, 10:26 AM CDT	Special Weather Statement	BMX	Jefferson	49 min
Aug 9, 10:36 AM CDT	Special Weather Statement	BMX	Cherokee	39 min
Aug 9, 11:07 AM CDT	Special Weather Statement	BMX	Jefferson	38 min
Aug 9, 11:12 AM CDT	Special Weather Statement	BMX	Clay	48 min
Aug 9, 11:21 AM CDT	Areal Flood Advisory	BMX	Blount, Jefferson, St. Clair, Shelby	114 min
Aug 9, 11:37 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Shelby, Talladega	38 min
Aug 9, 11:46 AM CDT	Areal Flood Advisory	BMX	Etowah	119 min
Aug 9, 12:02 PM CDT	Special Weather Statement	BMX	Etowah	43 min
Aug 9, 12:15 PM CDT	Special Weather Statement	BMX	Calhoun, Clay, Cleburne, Talladega	45 min
Aug 9, 12:24 PM CDT	Areal Flood Advisory	BMX	Calhoun, Clay, Talladega	111 min
Aug 9, 1:49 PM CDT	Areal Flood Advisory	BMX	Marengo, Sumter	116 min
Aug 9, 3:43 PM CDT	Special Weather Statement	BMX	Dallas	47 min
Aug 9, 4:33 PM CDT	Areal Flood Advisory	BMX	Elmore, Macon, Montgomery	3 hr
Aug 9, 4:42 PM CDT	Areal Flood Advisory	BMX	Autauga, Lowndes	3 hr
Aug 9, 5:01 PM CDT	Special Weather Statement	BMX	Lee	44 min
Aug 9, 5:13 PM CDT	Areal Flood Advisory	BMX	Lee	2 hr
Aug 9, 5:21 PM CDT	Areal Flood Advisory	BMX	Shelby	114 min
Aug 9, 5:41 PM CDT	Flash Flood Warning	BMX	Shelby	3 hr
Aug 9, 6:39 PM CDT	Special Weather Statement	BMX	Talladega	51 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.