Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 1354

June 12, 200325 counties in Alabama

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 1:34 PM CDT for 25 counties in Alabama. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 1:34 PM CDT (18:34 UTC)
Expired: Jun 12, 2003, 3:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 25 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL

The radar

The Birmingham radar (KBMX), 44 km from the middle of the area, began a volume at 18:34 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 12:00Z, 6.6 hours before the alert went out and 46 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: 253 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Chilton, Coosa, Fayette, Greene, Hale and 10 more	5 hr
Jun 11, 9:18 PM CDT	Mesoscale Discussion	SPC	Bibb, Chilton, Fayette, Greene, Hale, Jefferson and 6 more	87 min
Jun 12, 8:51 AM CDT	Mesoscale Discussion	SPC	Washington	84 min
Jun 12, 9:10 AM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Jun 12, 11:10 AM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Mobile, Washington	95 min
Jun 12, 1:15 PM CDT	Mesoscale Discussion	SPC	Clarke, Mobile, Washington	60 min

Nearby

Mesoscale Discussions in Alabama, 2003 Every mesoscale discussion in 2003

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.