Alert archive / Tennessee / Mesoscale Discussions in 2008
Mesoscale Discussion 476
The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2008, 4:54 PM EDT for 6 states. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Mar 19, 2008, 4:54 PM EDT (20:54 UTC)
- Expired
- Mar 19, 2008, 6:00 PM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 84 counties
Bell County, KY, Boyd County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Floyd County, KY, Harlan County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Lawrence County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Whitley County, KY, Cherokee County, NC, Graham County, NC, Gallia County, OH, Lawrence County, OH, 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, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Union County, TN, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Tazewell County, VA, Wise County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wyoming County, WV
The radar
The Jackson,KY radar (KJKL), 62 km from the middle of the area, began a volume at 20:56 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.9 hours before the alert went out and 264 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 464 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 344 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 9:43 PM EDT | Mesoscale Discussion | SPC | Caldwell, Calloway, Christian, Fulton, Graves, Hickman and 3 more | 92 min |
| Mar 19, 2:13 AM EDT | Mesoscale Discussion | SPC | Allen, Barren, Bullitt, Butler, Calloway, Christian and 18 more | 62 min |
| Mar 19, 2:32 PM EDT | Mesoscale Discussion | SPC | Bell, Breathitt, Clay, Floyd, Harlan, Jackson and 19 more | 58 min |
| Mar 19, 3:03 PM EDT | Tornado Watch | SPC | Bell, Breathitt, Clay, Estill, Floyd, Harlan and 19 more | 5 hr |
| Mar 19, 5:43 PM EDT | Severe Thunderstorm Watch | SPC | Cherokee, Clay, Graham, Haywood, Jackson, Macon and 2 more | 4 hr |
| Mar 19, 7:19 PM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham, Haywood, Jackson, Macon and 2 more | 86 min |
| Mar 18, 11:51 PM EDT | Tornado Watch | SPC | Chester, Decatur, Hardeman, Hardin, Henderson, McNairy | 8 hr |
| Mar 19, 12:42 AM EDT | Mesoscale Discussion | SPC | Carroll, Crockett, Fayette, Gibson, Hardeman, Haywood and 6 more | 63 min |
| Mar 19, 5:55 AM EDT | Mesoscale Discussion | SPC | Giles | 2 hr |
| Mar 19, 8:08 AM EDT | Mesoscale Discussion | SPC | Bedford, Franklin, Giles, Hardin, Lawrence, Lewis and 7 more | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in West Virginia, 2008Mesoscale Discussions in Kentucky, 2008Every 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.