Alert archive / Alabama / Special Weather Statements in 2014

Special Weather Statement, NWS Birmingham, AL

September 7, 2014Coosa County, Alabama

NWS Birmingham, AL issued this special weather statement at Sep 7, 2014, 9:17 PM CDT for Coosa County, Alabama. It was in force for 43 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: Sep 7, 2014, 9:17 PM CDT (02:17 UTC)
Expired: Sep 7, 2014, 10:00 PM CDT
In force: 43 min
Issued by: NWS Birmingham, AL

County Coosa County, AL

The radar

The Birmingham radar (KBMX), 54 km from the middle of the area, began a volume at 02:17 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, 2.3 hours before the alert went out and 170 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: 498 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -123 m²/s²
0-3 km storm-relative helicity: -110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 7:00 PM CDT	Special Weather Statement	BMX	Chambers, Lee, Macon, Tallapoosa	45 min
Sep 7, 7:53 PM CDT	Special Weather Statement	BMX	Chambers, Lee, Macon, Russell, Tallapoosa	52 min
Sep 8, 5:25 PM CDT	Special Weather Statement	BMX	Perry	50 min

Nearby

Special Weather Statements in Alabama, 2014 Every special weather statement in 2014

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.