Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

May 21, 2012Talladega County, Alabama

NWS Birmingham, AL issued this special weather statement at May 21, 2012, 4:36 PM CDT for Talladega County, Alabama. It was in force for 39 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, 4:36 PM CDT (21:36 UTC)
Expired: May 21, 2012, 5:15 PM CDT
In force: 39 min
Issued by: NWS Birmingham, AL

County Talladega County, AL

The radar

The Birmingham radar (KBMX), 43 km from the middle of the area, began a volume at 21:39 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, 9.6 hours before the alert went out and 43 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, 3:16 PM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, May 21, 3:16 PM CDT, 1 hour 20 minutes before

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Hazardous weather outlook, May 21, 11:37 AM CDT, 4 hours 59 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

Special weather statement, May 21, 3:31 PM CDT, 1 hour 5 minutes before

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Special weather statement, May 21, 3:56 PM CDT, 40 minutes before

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Local storm report, May 21, 4:05 PM CDT, 31 minutes before

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Special weather statement, May 21, 4:12 PM CDT, 24 minutes before

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Local storm report, May 21, 4:16 PM CDT, 20 minutes before

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Special weather statement, May 21, 4:36 PM 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
May 21, 11:24 AM CDT	Special Weather Statement	BMX	Autauga	51 min
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, 4:57 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; radar from the NEXRAD Level II archive.