Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

January 21, 2012Cleburne County, Alabama

NWS Birmingham, AL issued this special weather statement at Jan 21, 2012, 5:08 AM CST for Cleburne County, Alabama. It was in force for 52 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: Jan 21, 2012, 5:08 AM CST (11:08 UTC)
Expired: Jan 21, 2012, 6:00 AM CST
In force: 52 min
Issued by: NWS Birmingham, AL

County Cleburne County, AL

The radar

The Birmingham radar (KBMX), 102 km from the middle of the area, began a volume at 11:09 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 00:00Z, 11.1 hours before the alert went out and 102 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: 709 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 454 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 8.9

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 Jan 21, 4:34 AM CST, 34 minutes earlier.

Area forecast discussion, Jan 21, 4:34 AM CST, 34 minutes before

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Hazardous weather outlook, Jan 20, 11:22 PM CST, 5 hours 46 minutes before

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In the hours before

Special weather statement, Jan 21, 4:42 AM CST, 26 minutes before

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Special weather statement, Jan 21, 5:08 AM CST, 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
Jan 21, 4:42 AM CST	Special Weather Statement	BMX	Marion	48 min
Jan 21, 5:18 AM CST	Areal Flood Advisory	BMX	Calhoun, Cleburne, Talladega	117 min
Jan 21, 5:21 AM CST	Special Weather Statement	BMX	Marion, Winston	39 min
Jan 21, 6:03 AM CST	Special Weather Statement	BMX	Fayette, Lamar, Marion, Winston	42 min
Jan 21, 6:47 AM CST	Special Weather Statement	BMX	Fayette, Lamar, Walker, Winston	43 min
Jan 21, 7:26 AM CST	Special Weather Statement	BMX	Fayette, Pickens, Walker	34 min
Jan 21, 8:04 AM CST	Special Weather Statement	BMX	Pickens	41 min
Jan 21, 8:37 AM CST	Areal Flood Advisory	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	113 min
Jan 21, 8:58 AM CST	Special Weather Statement	BMX	Shelby	32 min
Jan 21, 9:28 AM CST	Special Weather Statement	BMX	Clay, Talladega	32 min
Jan 21, 9:53 AM CST	Special Weather Statement	BMX	Tallapoosa	37 min
Jan 21, 10:09 AM CST	Severe Thunderstorm Warning	BMX	Chambers, Clay, Randolph, Tallapoosa	36 min
Jan 21, 10:16 AM CST	Areal Flood Advisory	BMX	Clay, Talladega	119 min
Jan 21, 10:27 AM CST	Areal Flood Advisory	BMX	Randolph	2 hr
Jan 21, 11:17 AM CST	Areal Flood Advisory	BMX	Chambers	118 min
Jan 21, 11:47 AM CST	Special Weather Statement	BMX	Perry	43 min
Jan 21, 12:55 PM CST	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	50 min
Jan 21, 2:23 PM CST	Severe Thunderstorm Warning	BMX	Barbour, Bullock, Russell	37 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.