Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

July 4, 2012Clay County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 4, 2012, 5:00 PM CDT for Clay County, Alabama. It was in force for 45 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: Jul 4, 2012, 5:00 PM CDT (22:00 UTC)
Expired: Jul 4, 2012, 5:45 PM CDT
In force: 45 min
Issued by: NWS Birmingham, AL

County Clay County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.0 hours before the alert went out and 93 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: 756 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 43 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 Jul 4, 3:19 PM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jul 4, 3:19 PM CDT, 1 hour 41 minutes before

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Hazardous weather outlook, Jul 4, 10:41 AM CDT, 6 hours 19 minutes before

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In the hours before

Special weather statement, Jul 4, 2:16 PM CDT, 2 hours 44 minutes before

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Special weather statement, Jul 4, 2:17 PM CDT, 2 hours 43 minutes before

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Special weather statement, Jul 4, 2:39 PM CDT, 2 hours 21 minutes before

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Special weather statement, Jul 4, 4:23 PM CDT, 37 minutes before

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Special weather statement, Jul 4, 5:00 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
Jul 3, 7:39 PM CDT	Special Weather Statement	BMX	Macon	51 min
Jul 4, 3:18 AM CDT	Heat Advisory	BMX	Bibb, Dallas, Greene, Hale, Marengo, Perry and 3 more	7 hr
Jul 4, 2:16 PM CDT	Special Weather Statement	BMX	Walker	44 min
Jul 4, 2:17 PM CDT	Special Weather Statement	BMX	Fayette	43 min
Jul 4, 2:39 PM CDT	Special Weather Statement	BMX	Tuscaloosa	51 min
Jul 4, 4:23 PM CDT	Special Weather Statement	BMX	Marion	52 min
Jul 4, 6:51 PM CDT	Special Weather Statement	BMX	Dallas	39 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.