Alert archive / Tennessee / Mesoscale Discussions in 2008
Mesoscale Discussion 845
The Storm Prediction Center issued this mesoscale discussion at May 9, 2008, 6:18 PM CDT for 6 states. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2008, 6:18 PM CDT (23:18 UTC)
- Expired
- May 9, 2008, 7:15 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 102 counties
Colbert County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Dade County, GA, Bell County, KY, Breathitt County, KY, Clay County, KY, Clinton County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, McCreary County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Alcorn County, MS, Prentiss County, MS, Tishomingo County, MS, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Chester County, TN, Claiborne County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grainger County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hardin County, TN, Hawkins County, TN, Hickman County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN, City of Norton, VA, Dickenson County, VA, Lee County, VA, Scott County, VA, Wise County, VA
The radar
The Nashville radar (KOHX), 76 km from the middle of the area, began a volume at 23:19 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
Nashville Metro, TN (KBNA), launched 12:00Z, 11.3 hours before the alert went out and 78 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
- 526 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 93 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 |
|---|---|---|---|---|
| May 9, 4:56 AM CDT | Mesoscale Discussion | SPC | Bleckley, Bryan, Bulloch, Burke, Candler, Dodge and 18 more | 2 hr |
| May 9, 3:29 PM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, DeSoto, Marshall, Tate, Tunica | 2 hr |
| May 8, 7:38 PM CDT | Tornado Watch | SPC | Amelia, Brunswick, Caroline, Charles City, Chesterfield, Cumberland and 29 more | 6 hr |
| May 8, 8:47 PM CDT | Mesoscale Discussion | SPC | Albemarle, Amelia, Amherst, Appomattox, Arlington, Bedford and 61 more | 58 min |
| May 8, 11:06 PM CDT | Mesoscale Discussion | SPC | Halifax, City of Danville | 54 min |
| May 9, 1:32 AM CDT | Mesoscale Discussion | SPC | Accomack, Amelia, Appomattox, Brunswick, Buckingham, Campbell and 60 more | 88 min |
| May 9, 2:00 AM CDT | Tornado Watch | SPC | Accomack, Amelia, Brunswick, Charles City, Charlotte, Chesterfield and 45 more | 8 hr |
| May 9, 4:04 AM CDT | Mesoscale Discussion | SPC | Accomack, Amelia, Brunswick, Charles City, Charlotte, Chesterfield and 39 more | 56 min |
| May 9, 5:37 AM CDT | Mesoscale Discussion | SPC | Accomack, Brunswick, Charles City, Chesterfield, Dinwiddie, Gloucester and 36 more | 53 min |
| May 9, 7:29 AM CDT | Mesoscale Discussion | SPC | Charles City, Dinwiddie, Gloucester, Greensville, Henrico, Isle of Wight and 25 more | 61 min |
Nearby
Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Alabama, 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.