Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

August 14, 2012Winston County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 14, 2012, 2:33 AM CDT for Winston County, Alabama. It was in force for 42 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 14, 2012, 2:33 AM CDT (07:33 UTC)
Expired: Aug 14, 2012, 3:15 AM CDT
In force: 42 min
Issued by: NWS Birmingham, AL

County Winston County, AL

The radar

The Birmingham radar (KBMX), 93 km from the middle of the area, began a volume at 07:36 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 00:00Z, 7.6 hours before the alert went out and 248 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: 640 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.3

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 14, 12:56 AM CDT, 1 hour 37 minutes earlier.

Area forecast discussion, Aug 14, 12:56 AM CDT, 1 hour 37 minutes before

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Hazardous weather outlook, Aug 14, 1:15 AM CDT, 1 hour 18 minutes before

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In the hours before

Special weather statement, Aug 14, 1:02 AM CDT, 1 hour 31 minutes before

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Special weather statement, Aug 14, 1:11 AM CDT, 1 hour 22 minutes before

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Special weather statement, Aug 14, 1:38 AM CDT, 55 minutes before

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Special weather statement, Aug 14, 1:51 AM CDT, 42 minutes before

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Special weather statement, Aug 14, 2:17 AM CDT, 16 minutes before

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Special weather statement, Aug 14, 2:33 AM 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
Aug 13, 9:06 PM CDT	Flash Flood Warning	BMX	Lamar	3 hr
Aug 13, 9:47 PM CDT	Special Weather Statement	BMX	Winston	43 min
Aug 13, 10:19 PM CDT	Special Weather Statement	BMX	Fayette	41 min
Aug 13, 11:04 PM CDT	Special Weather Statement	BMX	Fayette	56 min
Aug 14, 12:29 AM CDT	Special Weather Statement	BMX	Shelby	46 min
Aug 14, 1:02 AM CDT	Special Weather Statement	BMX	Etowah, St. Clair	43 min
Aug 14, 1:11 AM CDT	Special Weather Statement	BMX	Shelby	49 min
Aug 14, 1:38 AM CDT	Special Weather Statement	BMX	Cherokee	52 min
Aug 14, 1:51 AM CDT	Special Weather Statement	BMX	Bibb	39 min
Aug 14, 2:17 AM CDT	Special Weather Statement	BMX	Calhoun, Cleburne	43 min
Aug 14, 7:35 AM CDT	Special Weather Statement	BMX	Lee	25 min
Aug 14, 1:07 PM CDT	Special Weather Statement	BMX	Pike	23 min
Aug 14, 1:23 PM CDT	Special Weather Statement	BMX	Montgomery	37 min
Aug 14, 1:38 PM CDT	Special Weather Statement	BMX	Pike	37 min
Aug 14, 1:57 PM CDT	Special Weather Statement	BMX	Barbour, Pike	48 min
Aug 14, 2:12 PM CDT	Special Weather Statement	BMX	Bullock	33 min
Aug 14, 3:00 PM CDT	Special Weather Statement	BMX	Barbour	30 min
Aug 14, 3:03 PM CDT	Special Weather Statement	BMX	Russell	42 min
Aug 14, 3:34 PM CDT	Areal Flood Advisory	BMX	Barbour	116 min
Aug 14, 3:36 PM CDT	Special Weather Statement	BMX	Barbour	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.