Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

August 18, 2012Autauga County, Coosa County, Elmore County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 18, 2012, 8:01 AM CDT for Autauga County, Coosa County, Elmore County, Alabama. It was in force for 44 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 18, 2012, 8:01 AM CDT (13:01 UTC)
Expired: Aug 18, 2012, 8:45 AM CDT
In force: 44 min
Issued by: NWS Birmingham, AL

Counties Autauga County, AL, Coosa County, AL, Elmore County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.0 hours before the alert went out and 190 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: 509 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 770 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Aug 18, 6:42 AM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Aug 18, 6:42 AM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, Aug 18, 6:16 AM CDT, 1 hour 45 minutes before

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In the hours before

Special weather statement, Aug 18, 4:34 AM CDT, 3 hours 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
434 AM CDT SAT AUG 18 2012

ALZ022-181030-
PICKENS AL-
434 AM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR PICKENS COUNTY UNTIL 530 AM
CDT...

AT 434 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM ETHELSVILLE TO 26 MILES
WEST OF PANOLA...AND MOVING EAST AT 35 MPH. AREAS IN NORTHERN
PICKENS COUNTY WILL BE IMPACTED FIRST AND IN THE SOUTH BY 445 AM CDT.

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 THESE STORMS INCLUDE...
  PICKENSVILLE...
  REFORM...
  CARROLLTON...
  ALICEVILLE...
  GARDEN...

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

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 3353 8828 3352 8786 3309 8800 3303 8810
      3304 8814 3300 8817 3299 8834
TIME...MOT...LOC 0933Z 284DEG 29KT 3344 8816 3296 8869

16

Special weather statement, Aug 18, 5:14 AM CDT, 2 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
514 AM CDT SAT AUG 18 2012

ALZ030-031-181100-
GREENE AL-SUMTER AL-
514 AM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SUMTER AND GREENE
COUNTIES UNTIL 600 AM CDT...

AT 511 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES SOUTHEAST OF
ALICEVILLE TO NEW WEST GREENE TO EMELLE...AND MOVING EAST AT 25 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  LIVINGSTON...
  EUTAW...
  WEST GREENE...
  EMELLE...
  BOYD...

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

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 3285 8836 3294 8823 3304 8814 3304 8804
      3315 8784 3302 8783 3302 8773 3299 8771
      3298 8775 3295 8773 3292 8777 3291 8776
      3288 8782 3280 8782 3277 8787 3276 8781
      3272 8783 3268 8778 3253 8787 3258 8840
TIME...MOT...LOC 1015Z 284DEG 23KT 3303 8804 3292 8811
          3277 8834

Local storm report, Aug 18, 6:00 AM CDT, 2 hours 1 minute before

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Local storm report, Aug 18, 7:52 AM CDT, 9 minutes before

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Special weather statement, Aug 18, 8:01 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 4:34 AM CDT	Special Weather Statement	BMX	Pickens	56 min
Aug 18, 5:04 AM CDT	Severe Thunderstorm Warning	BMX	Pickens	26 min
Aug 18, 5:14 AM CDT	Special Weather Statement	BMX	Greene, Sumter	46 min
Aug 18, 5:27 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Pickens, Tuscaloosa	48 min
Aug 18, 6:08 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Tuscaloosa	52 min
Aug 18, 6:48 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Shelby	24 min
Aug 18, 4:58 PM CDT	Special Weather Statement	BMX	Sumter	32 min
Aug 18, 5:44 PM CDT	Special Weather Statement	BMX	Marengo	46 min
Aug 18, 6:07 PM CDT	Areal Flood Advisory	BMX	Winston	4 hr
Aug 18, 6:18 PM CDT	Special Weather Statement	BMX	Dallas, Perry	57 min
Aug 18, 6:34 PM CDT	Special Weather Statement	BMX	Bibb	56 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.