Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

August 18, 2012Bibb County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 18, 2012, 6:34 PM CDT for Bibb County, Alabama. It was in force for 56 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, 6:34 PM CDT (23:34 UTC)
Expired: Aug 18, 2012, 7:30 PM CDT
In force: 56 min
Issued by: NWS Birmingham, AL

County Bibb County, AL

The radar

The Birmingham radar (KBMX), 44 km from the middle of the area, began a volume at 23:35 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.6 hours before the alert went out and 255 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, 3:15 PM CDT, 3 hours 19 minutes earlier.

Area forecast discussion, Aug 18, 3:15 PM CDT, 3 hours 19 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Aug 18, 12:52 PM CDT, 5 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1252 PM CDT SAT AUG 18 2012

ALZ011>015-017>050-191800-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
1252 PM CDT SAT AUG 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED SEVERE STORMS ARE POSSIBLE THROUGH 7 PM FOR AREAS ALONG AND
SOUTH OF A LINE FROM GEIGER...TO MOUNDVILLE...TO SELMA LINE.
DAMAGING WINDS WILL BE THE PRIMARY THREAT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT ACROSS THE
SOUTHWEST PORTIONS OF CENTRAL ALABAMA.

In the hours before

Special weather statement, Aug 18, 4:58 PM CDT, 1 hour 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
458 PM CDT SAT AUG 18 2012

ALZ030-039-182230-
MARENGO AL-SUMTER AL-
458 PM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SUMTER AND
NORTHWESTERN MARENGO COUNTIES UNTIL 530 PM CDT...

AT 453 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR COATOPA...OR 12 MILES WEST OF DEMOPOLIS...MOVING
NORTHEAST AT 10 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  DEMOPOLIS...
  DUG HILL...
  US 80 AND AL 28...
  DEMOPOLIS MUNICIPAL AIRPORT...
  MCDOWELL...

&&

LAT...LON 3260 8802 3263 8793 3262 8786 3261 8784
      3260 8784 3259 8786 3261 8788 3260 8790
      3253 8786 3255 8784 3254 8782 3252 8782
      3252 8773 3249 8773 3233 8804 3247 8817
TIME...MOT...LOC 2158Z 233DEG 10KT 3246 8802

GRANTHAM

Special weather statement, Aug 18, 5:44 PM CDT, 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
544 PM CDT SAT AUG 18 2012

ALZ030-031-039-182330-
GREENE AL-MARENGO AL-SUMTER AL-
544 PM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SUMTER...MARENGO AND
SOUTHEASTERN GREENE COUNTIES UNTIL 630 PM CDT...

AT 540 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM COATOPA TO 6 MILES
NORTHEAST OF MT STERLING TO DIXONS MILL...AND MOVING NORTHEAST AT 30
MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  DEMOPOLIS...
  LINDEN...
  SWEET WATER...
  COATOPA...
  WAYNE...

&&

LAT...LON 3272 8780 3266 8779 3265 8774 3263 8781
      3259 8774 3258 8779 3253 8781 3252 8773
      3248 8772 3248 8759 3237 8758 3231 8748
      3214 8752 3213 8761 3205 8762 3198 8780
      3209 8806 3230 8801 3230 8819 3256 8821
TIME...MOT...LOC 2244Z 246DEG 28KT 3251 8811 3218 8808
          3206 8779

GRANTHAM

Special weather statement, Aug 18, 6:18 PM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
618 PM CDT SAT AUG 18 2012

ALZ032-033-039>041-190015-
AUTAUGA AL-DALLAS AL-HALE AL-MARENGO AL-PERRY AL-
618 PM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN AUTAUGA...PERRY...
NORTHEASTERN MARENGO...SOUTHERN HALE AND DALLAS COUNTIES UNTIL 715 PM
CDT...

AT 612 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM DEMOPOLIS TO 7 MILES
NORTHEAST OF ANNE MARIE...AND MOVING NORTHEAST AT 45 MPH.

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...
  UNIONTOWN...
  GREENSBORO...
  MARION...
  SELMONT-WEST SELMONT...
  SELMA...

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 3252 8784 3255 8784 3254 8782 3252 8782
      3259 8778 3257 8776 3259 8774 3261 8775
      3261 8780 3284 8730 3283 8715 3238 8678
      3215 8729 3226 8745 3226 8751 3214 8752
      3213 8755 3252 8788
TIME...MOT...LOC 2318Z 242DEG 38KT 3253 8774 3217 8744

GRANTHAM

Special weather statement, Aug 18, 6:34 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
634 PM CDT SAT AUG 18 2012

ALZ034-190030-
BIBB AL-
634 PM CDT SAT AUG 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR BIBB COUNTY UNTIL 730 PM CDT...

AT 631 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM MERTZ TO 11 MILES WEST OF
PARNELL...AND MOVING NORTHEAST AT 25 MPH.

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...
  BRENT...
  CENTREVILLE...
  HARRISBURG...
  LOW GAP...
  TALLADEGA NATIONAL FOREST...

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 3301 8736 3301 8732 3305 8732 3313 8722
      3313 8720 3315 8720 3320 8714 3312 8697
      3308 8695 3305 8688 3283 8688 3283 8731
      3287 8732 3288 8742 3296 8742
TIME...MOT...LOC 2335Z 225DEG 21KT 3288 8737 3276 8707

GRANTHAM

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, 8:01 AM CDT	Special Weather Statement	BMX	Autauga, Coosa, Elmore	44 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

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.