Alert archive / Virginia / Mesoscale Discussions in 2005
Mesoscale Discussion 2120
The Storm Prediction Center issued this mesoscale discussion at Aug 30, 2005, 12:42 PM EDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2005, 12:42 PM EDT (16:42 UTC)
- Expired
- Aug 30, 2005, 2:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 92 counties
Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Davie County, NC, Forsyth County, NC, Iredell County, NC, Lincoln County, NC, Mitchell County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Carter County, TN, Hancock County, TN, Hawkins County, TN, Johnson County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Norton, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, Craig County, VA, Culpeper County, VA, Dickenson County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Henry County, VA, Highland County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Page County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Braxton County, WV, Clay County, WV, Fayette County, WV, Greenbrier County, WV, Lewis County, WV, McDowell County, WV, Mercer County, WV, Monroe County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV
The radar
The Roanoke radar (KFCX), 81 km from the middle of the area, began a volume at 16:45 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
Roanoke, VA (KRNK), launched 12:00Z, 4.7 hours before the alert went out and 146 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
- 278 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 644 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 224 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| Aug 29, 11:05 PM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham | 115 min |
| Aug 30, 4:39 AM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 34 more | 2 hr |
| Aug 30, 5:50 AM EDT | Tornado Watch | SPC | Cherokee, Clay, Graham, Haywood, Jackson, Macon and 2 more | 8 hr |
| Aug 30, 8:35 AM EDT | Tornado Watch | SPC | Alexander, Buncombe, Burke, Cabarrus, Caldwell, Catawba and 16 more | 5 hr |
| Aug 30, 8:47 AM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham, Haywood, Jackson, Macon and 2 more | 118 min |
| Aug 30, 1:25 PM EDT | Tornado Watch | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 30 more | 8 hr |
| Aug 30, 4:37 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Burke, Caldwell and 13 more | 83 min |
| Aug 30, 12:59 AM EDT | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more | 3 hr |
| Aug 30, 1:55 PM EDT | Tornado Watch | SPC | Greene, Hancock, Hawkins, Sullivan, Washington | 7 hr |
| Aug 30, 6:35 PM EDT | Tornado Watch | SPC | Albemarle, Amherst, Appomattox, Arlington, Augusta, Bath and 47 more | 5 hr |
Nearby
Mesoscale Discussions in Virginia, 2005Mesoscale Discussions in North Carolina, 2005Mesoscale Discussions in West Virginia, 2005Every mesoscale discussion in 2005
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.