Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

May 21, 2012Tallapoosa County, Alabama

NWS Birmingham, AL issued this special weather statement at May 21, 2012, 3:31 PM CDT for Tallapoosa 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
May 21, 2012, 3:31 PM CDT (20:31 UTC)
Expired
May 21, 2012, 4:15 PM CDT
In force
44 min
Issued by
NWS Birmingham, AL

County Tallapoosa County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.5 hours before the alert went out and 106 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, Birmingham, AL at 12:00Z on 2012-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 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, Birmingham, AL at 12:00Z on 2012-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.1939Sfc1 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
468 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1309 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
-8 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 May 21, 3:16 PM CDT, 15 minutes earlier.

Area forecast discussion, May 21, 3:16 PM CDT, 15 minutes before
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Hazardous weather outlook, May 21, 11:37 AM CDT, 3 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1137 AM CDT MON MAY 21 2012

ALZ011>015-017>050-221737-
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-
1137 AM CDT MON MAY 21 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.

08/MNK

In the hours before

Local storm report, May 21, 2:39 PM CDT, 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
239 PM CDT MON MAY 21 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0237 PM     HAIL             OPELIKA                 32.65N 85.38W
05/21/2012  M1.00 INCH       LEE                AL   PUBLIC

            UPWARDS TO 25 CENT HAIL. AT I85 AND SR51.

&&

MBAER
Special weather statement, May 21, 2:51 PM CDT, 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
251 PM CDT MON MAY 21 2012

ALZ047-048-212030-
LEE AL-RUSSELL AL-
251 PM CDT MON MAY 21 2012

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL RUSSELL AND SOUTHERN LEE
COUNTIES UNTIL 330 PM CDT...

AT 248 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR GRIFFEN MILL...OR 11 MILES SOUTHEAST OF OPELIKA...
MOVING SOUTHEAST AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  RUSSELL COUNTY SPORTS COMPLEX...
  SEALE...
  CRAWFORD...
  PARKMANVILLE...
  HATCHECHUBBE...

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 3208 8519 3210 8522 3254 8537 3257 8519
      3224 8499
TIME...MOT...LOC 1951Z 335DEG 24KT 3250 8528

JD/02
Local storm report, May 21, 3:06 PM CDT, 25 minutes before
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Special weather statement, May 21, 3:18 PM CDT, 13 minutes before
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Special weather statement, May 21, 3:29 PM CDT, 2 minutes before
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Special weather statement, May 21, 3:31 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 11:24 AM CDTSpecial Weather StatementBMXAutauga51 min
May 21, 12:16 PM CDTSpecial Weather StatementBMXMontgomery59 min
May 21, 12:57 PM CDTSpecial Weather StatementBMXMacon, Montgomery48 min
May 21, 1:28 PM CDTSpecial Weather StatementBMXAutauga47 min
May 21, 2:13 PM CDTSpecial Weather StatementBMXAutauga, Lowndes47 min
May 21, 2:19 PM CDTSevere Thunderstorm WarningBMXChambers, Lee26 min
May 21, 2:51 PM CDTSpecial Weather StatementBMXRussell39 min
May 21, 2:56 PM CDTSevere Thunderstorm WarningBMXLee, Russell34 min
May 21, 3:18 PM CDTSpecial Weather StatementBMXChambers42 min
May 21, 3:29 PM CDTSpecial Weather StatementBMXWinston46 min
May 21, 3:56 PM CDTSpecial Weather StatementBMXChambers49 min
May 21, 4:12 PM CDTSpecial Weather StatementBMXTallapoosa48 min
May 21, 4:36 PM CDTSpecial Weather StatementBMXTalladega39 min
May 21, 4:57 PM CDTSpecial Weather StatementBMXChambers48 min
May 21, 5:31 PM CDTSpecial Weather StatementBMXJefferson29 min
May 21, 5:42 PM CDTSpecial Weather StatementBMXCherokee48 min
May 21, 5:52 PM CDTSpecial Weather StatementBMXAutauga38 min
May 21, 6:36 PM CDTSpecial Weather StatementBMXEtowah24 min

Nearby

Special Weather Statements in Alabama, 2012Every 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.