Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

May 21, 2012Autauga County, Alabama

NWS Birmingham, AL issued this special weather statement at May 21, 2012, 11:24 AM CDT for Autauga County, Alabama. It was in force for 51 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, 11:24 AM CDT (16:24 UTC)
Expired: May 21, 2012, 12:15 PM CDT
In force: 51 min
Issued by: NWS Birmingham, AL

County Autauga County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.4 hours before the alert went out and 68 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: 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, 6:45 AM CDT, 4 hours 39 minutes earlier.

Area forecast discussion, May 21, 6:45 AM CDT, 4 hours 39 minutes before

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Hazardous weather outlook, May 21, 5:43 AM CDT, 5 hours 41 minutes before

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In the hours before

Local storm report, May 21, 8:35 AM CDT, 2 hours 49 minutes before

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Local storm report, May 21, 8:39 AM CDT, 2 hours 45 minutes before

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Local storm report, May 21, 8:42 AM CDT, 2 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BIRMINGHAM AL
842 AM CDT MON MAY 21 2012

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

0525 PM     TSTM WND DMG     3 E DETROIT             34.03N 88.12W
05/20/2012                   LAMAR              AL   EMERGENCY MNGR

            NUMEROUS TREES DOWN ALONG COUNTY ROAD 16 FROM HENSON
            SPRINGS TO DETROIT. CORRECTED FOR LOCATION.

0543 PM     TSTM WND DMG     2 WSW DETROIT           34.02N 88.20W
05/20/2012                   LAMAR              AL   EMERGENCY MNGR

            ONE TREE DOWN ALONG HATLEY-DETROIT ROAD...AND ANOTHER
            TREE DOWN NEAR THE FIRE DEPT ON HWY 17. NUMEROUS POWER
            OUTAGES IN AND AROUND DETROIT...INCLUDING AREAS WEST AND
            SOUTHWEST OF THE CITY.

0555 PM     HAIL             1 S BEXAR               34.17N 88.15W
05/20/2012  E1.00 INCH       MARION             AL   AMATEUR RADIO

            QUARTER SIZED HAIL REPORTED ALONG COUNTY ROAD 13,
            SOUTHWEST OF INTERSTATE 22, EXIT 3.

&&

TGOGGINS

Special weather statement, May 21, 11:24 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1124 AM CDT MON MAY 21 2012

ALZ035-041-043-211715-
AUTAUGA AL-CHILTON AL-ELMORE AL-
1124 AM CDT MON MAY 21 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN AUTAUGA...WESTERN
ELMORE AND SOUTHEASTERN CHILTON COUNTIES UNTIL 1215 PM CDT...

AT 1120 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM 5 MILES WEST OF MARBURY...OR 11 MILES SOUTHEAST OF
CLANTON...MOVING EAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  VERBENA...
  MARBURY...
  DEATSVILLE...
  TITUS...
  WEOKA MILLS...

&&

LAT...LON 3260 8666 3278 8665 3277 8640 3275 8638
      3276 8633 3275 8632 3275 8621 3247 8629
      3249 8631 3246 8631
TIME...MOT...LOC 1623Z 274DEG 10KT 3269 8655

08/MNK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 12:16 PM CDT	Special Weather Statement	BMX	Montgomery	59 min
May 21, 12:57 PM CDT	Special Weather Statement	BMX	Macon, Montgomery	48 min
May 21, 1:28 PM CDT	Special Weather Statement	BMX	Autauga	47 min
May 21, 2:13 PM CDT	Special Weather Statement	BMX	Autauga, Lowndes	47 min
May 21, 2:19 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	26 min
May 21, 2:51 PM CDT	Special Weather Statement	BMX	Russell	39 min
May 21, 2:56 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	34 min
May 21, 3:18 PM CDT	Special Weather Statement	BMX	Chambers	42 min
May 21, 3:29 PM CDT	Special Weather Statement	BMX	Winston	46 min
May 21, 3:31 PM CDT	Special Weather Statement	BMX	Tallapoosa	44 min
May 21, 3:56 PM CDT	Special Weather Statement	BMX	Chambers	49 min
May 21, 4:12 PM CDT	Special Weather Statement	BMX	Tallapoosa	48 min
May 21, 4:36 PM CDT	Special Weather Statement	BMX	Talladega	39 min
May 21, 4:57 PM CDT	Special Weather Statement	BMX	Chambers	48 min
May 21, 5:31 PM CDT	Special Weather Statement	BMX	Jefferson	29 min
May 21, 5:42 PM CDT	Special Weather Statement	BMX	Cherokee	48 min
May 21, 5:52 PM CDT	Special Weather Statement	BMX	Autauga	38 min
May 21, 6:36 PM CDT	Special Weather Statement	BMX	Etowah	24 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.