Alert archive / Tennessee / Mesoscale Discussions in 2008

Mesoscale Discussion 53

January 10, 20085 states

The Storm Prediction Center issued this mesoscale discussion at Jan 10, 2008, 7:29 PM EST for 5 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jan 10, 2008, 7:29 PM EST (00:29 UTC)
Expired: Jan 10, 2008, 8:30 PM EST
In force: 61 min
Issued by: the Storm Prediction Center

All 62 counties

Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Bell County, KY, Breathitt County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Leslie County, KY, Letcher County, KY, Perry County, KY, Pike County, KY, Cherokee County, NC, Clay County, NC, Graham County, NC, Macon County, NC, Swain County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sevier County, TN, Union County, TN, City of Norton, VA, Dickenson County, VA, Lee County, VA, Scott County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 2 km from the middle of the area, began a volume at 00:32 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

Nashville Metro, TN (KBNA), launched 00:00Z, 0.5 hours before the alert went out and 286 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: 449 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 674 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 318 m²/s²
0-3 km storm-relative helicity: 372 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.0

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
Jan 10, 8:52 PM EST	Mesoscale Discussion	SPC	Bartow, Carroll, Catoosa, Chattahoochee, Chattooga, Cherokee and 29 more	53 min
Jan 10, 10:38 PM EST	Mesoscale Discussion	SPC	Chattahoochee, Harris, Meriwether, Muscogee, Stewart, Troup	67 min
Jan 11, 12:18 AM EST	Mesoscale Discussion	SPC	Bibb, Bleckley, Calhoun, Chattahoochee, Clay, Crawford and 23 more	87 min
Jan 11, 12:55 AM EST	Tornado Watch	SPC	Baldwin, Bibb, Bleckley, Chattahoochee, Clay, Crawford and 39 more	6 hr
Jan 11, 2:21 AM EST	Tornado Watch	SPC	Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 16 more	7 hr
Jan 11, 3:05 AM EST	Mesoscale Discussion	SPC	Baldwin, Burke, Columbia, Emanuel, Glascock, Greene and 13 more	85 min
Jan 11, 4:27 AM EST	Mesoscale Discussion	SPC	Bleckley, Calhoun, Clay, Crisp, Dodge, Dooly and 14 more	63 min
Jan 11, 5:30 AM EST	Mesoscale Discussion	SPC	Baker, Berrien, Brooks, Calhoun, Colquitt, Cook and 13 more	90 min
Jan 11, 5:01 AM EST	Mesoscale Discussion	SPC	Anson, Bladen, Columbus, Cumberland, Duplin, Greene and 16 more	59 min

Nearby

Mesoscale Discussions in Tennessee, 2008 Mesoscale Discussions in Georgia, 2008 Mesoscale Discussions in Kentucky, 2008 Every mesoscale discussion in 2008

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.