Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 2014

September 22, 200613 counties in Alabama; 11 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Sep 22, 2006, 6:15 PM CDT for 13 counties in Alabama; 11 counties in Mississippi. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Sep 22, 2006, 6:15 PM CDT (23:15 UTC)
Expired: Sep 22, 2006, 7:15 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

All 24 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Jefferson County, AL, Lamar County, AL, Lawrence County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Walker County, AL, Winston County, AL, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lee County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS

The radar

The Columbus AFB radar (KGWX), 63 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 160 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 911 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 373 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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
Sep 22, 1:11 PM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 3 more	94 min
Sep 22, 2:10 PM CDT	Tornado Watch	SPC	Blount, Calhoun, Clay, Colbert, Coosa, Cullman and 18 more	5 hr
Sep 22, 4:08 AM CDT	Mesoscale Discussion	SPC	Coahoma, DeSoto, Marshall, Quitman, Tate, Tunica	67 min
Sep 22, 4:39 AM CDT	Tornado Watch	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	5 hr
Sep 22, 8:35 AM CDT	Mesoscale Discussion	SPC	Coahoma, DeSoto, Panola, Quitman, Tate, Tunica	85 min
Sep 22, 9:10 AM CDT	Tornado Watch PDS	SPC	Coahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more	9 hr
Sep 22, 12:15 PM CDT	Mesoscale Discussion	SPC	Benton, Bolivar, Coahoma, DeSoto, Lafayette, Marshall and 7 more	90 min
Sep 22, 3:00 PM CDT	Mesoscale Discussion	SPC	Benton, Bolivar, Coahoma, DeSoto, Lafayette, Marshall and 6 more	90 min

Nearby

Mesoscale Discussions in Alabama, 2006 Mesoscale Discussions in Mississippi, 2006 Every mesoscale discussion in 2006

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.