Alert archive / Alabama / Special Weather Statements in 2016

Special Weather Statement, NWS Birmingham, AL

August 13, 2016Shelby County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 13, 2016, 2:49 PM CDT for Shelby County, Alabama. It was in force for 26 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 13, 2016, 2:49 PM CDT (19:49 UTC)
Expired: Aug 13, 2016, 3:15 PM CDT
In force: 26 min
Issued by: NWS Birmingham, AL

County Shelby County, AL

The radar

The Birmingham radar (KBMX), 15 km from the middle of the area, began a volume at 19:51 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 12:00Z, 7.8 hours before the alert went out and 226 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: 178 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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, 2:05 PM CDT	Special Weather Statement	BMX	Chilton	40 min
Aug 13, 3:31 PM CDT	Special Weather Statement	BMX	Shelby	29 min
Aug 13, 3:34 PM CDT	Special Weather Statement	BMX	Elmore	26 min
Aug 13, 3:45 PM CDT	Special Weather Statement	BMX	Jefferson	45 min
Aug 13, 3:48 PM CDT	Special Weather Statement	BMX	Coosa	42 min
Aug 13, 4:00 PM CDT	Special Weather Statement	BMX	Pike	45 min
Aug 13, 4:16 PM CDT	Special Weather Statement	BMX	Blount	44 min
Aug 13, 4:17 PM CDT	Special Weather Statement	BMX	Blount	43 min
Aug 13, 4:19 PM CDT	Special Weather Statement	BMX	Talladega	41 min
Aug 13, 4:26 PM CDT	Special Weather Statement	BMX	Russell	34 min
Aug 13, 4:29 PM CDT	Special Weather Statement	BMX	Pike	31 min
Aug 13, 4:44 PM CDT	Special Weather Statement	BMX	Montgomery	31 min
Aug 13, 4:46 PM CDT	Special Weather Statement	BMX	Russell	29 min
Aug 13, 5:00 PM CDT	Special Weather Statement	BMX	Bullock	30 min
Aug 13, 5:19 PM CDT	Special Weather Statement	BMX	Macon	41 min
Aug 13, 5:27 PM CDT	Special Weather Statement	BMX	Calhoun	48 min
Aug 13, 5:33 PM CDT	Special Weather Statement	BMX	Lee	27 min
Aug 13, 5:55 PM CDT	Special Weather Statement	BMX	Macon	35 min
Aug 13, 6:35 PM CDT	Special Weather Statement	BMX	Chambers	25 min

Nearby

Special Weather Statements in Alabama, 2016 Every special weather statement in 2016

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.