Alert archive / Tennessee / Mesoscale Discussions in 2006

Mesoscale Discussion 18

January 2, 20069 counties in Alabama; Alcorn County, Prentiss County, Tishomingo County, Mississippi; 44 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2006, 11:11 AM CST for 9 counties in Alabama; Alcorn County, Prentiss County, Tishomingo County, Mississippi; 44 counties in Tennessee. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jan 2, 2006, 11:11 AM CST (17:11 UTC)
Expired
Jan 2, 2006, 12:45 PM CST
In force
94 min
Issued by
the Storm Prediction Center
All 56 counties

Colbert County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Morgan County, AL, Alcorn County, MS, Prentiss County, MS, Tishomingo County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardin County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 120 km from the middle of the area, began a volume at 17:13 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 12:00Z, 5.2 hours before the alert went out and 108 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2006-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2006-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 317 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
572 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
317 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
1.2
Supercell composite
4.5

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.

IssuedProductOfficeCountiesLasted
Jan 1, 8:26 PM CSTMesoscale DiscussionSPCBarbour, Butler, Coffee, Conecuh, Covington, Crenshaw and 7 more2 hr
Jan 2, 3:01 AM CSTMesoscale DiscussionSPCColbert, Lauderdale59 min
Jan 2, 6:45 AM CSTMesoscale DiscussionSPCCoffee, Covington, Dale, Geneva, Houston30 min
Jan 2, 7:10 AM CSTTornado WatchSPCBarbour, Butler, Coffee, Conecuh, Covington, Crenshaw and 6 more5 hr
Jan 2, 9:47 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Calhoun, Chambers and 23 more88 min
Jan 2, 3:20 PM CSTMesoscale DiscussionSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, Etowah and 6 more85 min
Jan 1, 10:55 PM CSTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more7 hr
Jan 2, 7:57 AM CSTMesoscale DiscussionSPCBenton, Carroll, Cheatham, Chester, Crockett, Decatur and 29 more93 min
Jan 2, 4:55 PM CSTMesoscale DiscussionSPCCampbell, Claiborne, Grainger, Hamblen, Hancock, Hawkins and 3 more95 min
Jan 2, 5:08 PM CSTSevere Thunderstorm WatchSPCBlount, Claiborne, Cocke, Grainger, Greene, Hamblen and 8 more5 hr

Nearby

Mesoscale Discussions in Tennessee, 2006Mesoscale Discussions in Alabama, 2006Mesoscale Discussions in Mississippi, 2006Every 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.