Alert archive / Virginia / Mesoscale Discussions in 2005

Mesoscale Discussion 1994

August 16, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2005, 5:02 PM EDT for 4 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Aug 16, 2005, 5:02 PM EDT (21:02 UTC)
Expired: Aug 16, 2005, 6:00 PM EDT
In force: 58 min
Issued by: the Storm Prediction Center

All 66 counties

Alleghany County, NC, Ashe County, NC, Caswell County, NC, Person County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Johnson County, TN, Sullivan County, TN, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Bristol, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, Craig County, VA, Dickenson County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Halifax County, VA, Henry County, VA, Montgomery County, VA, Nelson County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Russell County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wythe County, VA, Fayette County, WV, Greenbrier County, WV, McDowell County, WV, Mercer County, WV, Monroe County, WV, Raleigh County, WV, Summers County, WV, Wyoming County, WV

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.0 hours before the alert went out and 141 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1568 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Aug 16, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	Alleghany, Ashe, Caswell, Person, Rockingham, Stokes and 1 more	8 hr
Aug 16, 3:09 PM EDT	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Edgecombe, Gates and 8 more	36 min
Aug 16, 3:55 PM EDT	Severe Thunderstorm Watch	SPC	Bertie, Camden, Chowan, Currituck, Gates, Granville and 7 more	6 hr
Aug 16, 7:57 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Bertie, Buncombe, Burke, Caldwell and 34 more	93 min
Aug 16, 1:13 PM EDT	Mesoscale Discussion	SPC	Albemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 38 more	62 min
Aug 16, 6:21 PM EDT	Mesoscale Discussion	SPC	Amelia, Brunswick, Caroline, Charles City, Chesterfield, Dinwiddie and 41 more	84 min

Nearby

Mesoscale Discussions in Virginia, 2005 Mesoscale Discussions in West Virginia, 2005 Mesoscale Discussions in North Carolina, 2005 Every 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.