Alert archive / Kentucky / Mesoscale Discussions in 2009
Mesoscale Discussion 766
The Storm Prediction Center issued this mesoscale discussion at May 8, 2009, 6:03 PM EDT for 8 states. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- May 8, 2009, 6:03 PM EDT (22:03 UTC)
- Expired
- May 8, 2009, 7:30 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 111 counties
Rabun County, GA, Towns County, GA, Union County, GA, Bell County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clay County, KY, Elliott County, KY, Floyd County, KY, Greenup County, KY, Harlan County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY, Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Wilkes County, NC, Yancey County, NC, Gallia County, OH, Lawrence County, OH, Oconee County, SC, Pickens County, SC, Anderson County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Monroe County, TN, Morgan County, TN, Roane County, TN, Scott County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Bland County, VA, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Grayson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Boone County, WV, Cabell County, WV, Clay County, WV, Fayette County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Putnam County, WV, Raleigh County, WV, Summers County, WV, Wayne County, WV, Wyoming County, WV
The radar
The Knoxville radar (KMRX), 82 km from the middle of the area, began a volume at 22:03 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.1 hours before the alert went out and 293 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
- 44 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1315 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 138 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 8, 11:35 AM EDT | Mesoscale Discussion | SPC | Columbia, Elbert, Lincoln, Wilkes | 85 min |
| May 8, 6:32 PM EDT | Tornado Watch | SPC | Franklin, Habersham, Hart, Rabun, Stephens | 7 hr |
| May 7, 11:17 PM EDT | Severe Thunderstorm Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 8 hr |
| May 8, 12:46 AM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Carlisle, Christian, Crittenden, Henderson and 9 more | 89 min |
| May 8, 4:34 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Ballard, Barren, Butler, Caldwell and 24 more | 56 min |
| May 8, 5:29 AM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Clinton, Cumberland, Logan and 5 more | 3 hr |
| May 8, 9:37 AM EDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Fulton, Graves, Hickman and 4 more | 53 min |
| May 8, 10:21 AM EDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 7 hr |
| May 8, 1:08 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bell, Bourbon and 54 more | 97 min |
| May 8, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 72 more | 6 hr |
| May 8, 3:16 PM EDT | Mesoscale Discussion | SPC | Calloway, Christian, Daviess, Fulton, Graves, Henderson and 8 more | 89 min |
| May 8, 4:42 PM EDT | Tornado Watch | SPC | Adair, Bell, Breathitt, Clay, Clinton, Cumberland and 18 more | 7 hr |
| May 7, 10:18 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Cumberland, Duplin and 19 more | 87 min |
| May 8, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | Anson, Bladen, Brunswick, Carteret, Columbus, Craven and 17 more | 4 hr |
| May 8, 4:24 PM EDT | Mesoscale Discussion | SPC | Bedford, Benton, Bledsoe, Cannon, Carroll, Cheatham and 32 more | 66 min |
Nearby
Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Tennessee, 2009Mesoscale Discussions in North Carolina, 2009Every mesoscale discussion in 2009
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.