Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

July 27, 2012Jefferson County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 27, 2012, 1:46 PM CDT for Jefferson 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: Jul 27, 2012, 1:46 PM CDT (18:46 UTC)
Expired: Jul 27, 2012, 2:30 PM CDT
In force: 44 min
Issued by: NWS Birmingham, AL

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 40 km from the middle of the area, began a volume at 18:50 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 12:00Z, 6.8 hours before the alert went out and 39 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: 1540 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 9 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.

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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 Jul 27, 12:51 PM CDT, 55 minutes earlier.

Area forecast discussion, Jul 27, 12:51 PM CDT, 55 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Jul 27, 12:55 PM CDT, 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1255 PM CDT FRI JUL 27 2012

ALZ011>015-017>050-281800-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
1255 PM CDT FRI JUL 27 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FEW STRONG TO SEVERE THUNDERSTORMS MAY IMPACT CENTRAL ALABAMA
THIS AFTERNOON...BETWEEN 2 PM AND 8 PM...AHEAD OF A SLOW MOVING
COLD FRONT. AREAS MOST LIKELY TO BE IMPACTED WILL BE ALONG AND
NORTH OF A TUSCALOOSA...TO ANNISTON LINE...WITH DAMAGING WINDS AND
LARGE HAIL AS THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE
NEEDED THIS AFTERNOON.

08/MK

In the hours before

Special weather statement, Jul 27, 1:46 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
146 PM CDT FRI JUL 27 2012

ALZ023-024-271930-
JEFFERSON AL-TUSCALOOSA AL-
146 PM CDT FRI JUL 27 2012

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN TUSCALOOSA AND SOUTHERN
JEFFERSON COUNTIES UNTIL 230 PM CDT...

AT 142 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR OAK GROVE...OR 12 MILES WEST OF HUEYTOWN...MOVING
SOUTHEAST AT 15 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  HUEYTOWN...
  FAIRFIELD...
  BESSEMER...
  OAK GROVE...
  SYLVAN SPRINGS...

THIS STORM 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.

&&

LAT...LON 3356 8718 3349 8684 3322 8711 3322 8712
      3324 8712 3323 8714 3345 8733
TIME...MOT...LOC 1846Z 321DEG 13KT 3344 8720

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:45 PM CDT	Special Weather Statement	BMX	Russell	30 min
Jul 27, 2:41 PM CDT	Special Weather Statement	BMX	Etowah	34 min
Jul 27, 3:09 PM CDT	Special Weather Statement	BMX	Shelby	36 min
Jul 27, 3:28 PM CDT	Special Weather Statement	BMX	Bibb	32 min
Jul 27, 3:34 PM CDT	Special Weather Statement	BMX	Greene	26 min
Jul 27, 3:37 PM CDT	Special Weather Statement	BMX	Blount	23 min
Jul 27, 3:48 PM CDT	Special Weather Statement	BMX	Shelby	27 min
Jul 27, 3:55 PM CDT	Special Weather Statement	BMX	Sumter	35 min
Jul 27, 4:02 PM CDT	Areal Flood Advisory	BMX	Blount	58 min
Jul 27, 4:08 PM CDT	Special Weather Statement	BMX	Calhoun	37 min
Jul 27, 4:28 PM CDT	Severe Thunderstorm Warning	BMX	Blount	32 min
Jul 27, 4:32 PM CDT	Special Weather Statement	BMX	Marion	28 min
Jul 27, 4:48 PM CDT	Flash Flood Warning	BMX	Blount	2 hr
Jul 27, 4:58 PM CDT	Areal Flood Advisory	BMX	St. Clair	2 hr
Jul 27, 5:01 PM CDT	Special Weather Statement	BMX	St. Clair	29 min
Jul 27, 5:02 PM CDT	Areal Flood Advisory	BMX	Cherokee	118 min
Jul 27, 5:05 PM CDT	Special Weather Statement	BMX	Marion	40 min
Jul 27, 5:08 PM CDT	Special Weather Statement	BMX	Macon	37 min
Jul 27, 5:19 PM CDT	Areal Flood Advisory	BMX	Marion	116 min
Jul 27, 5:19 PM CDT	Special Weather Statement	BMX	Greene	26 min
Jul 27, 6:25 PM CDT	Special Weather Statement	BMX	Russell	35 min
Jul 27, 6:45 PM CDT	Special Weather Statement	BMX	Lamar	45 min
Jul 27, 6:57 PM CDT	Special Weather Statement	BMX	Russell	33 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.