Alert archive / Virginia / Mesoscale Discussions in 2012
Mesoscale Discussion 1311
The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2012, 6:03 PM EDT for 6 states. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 29, 2012, 6:03 PM EDT (22:03 UTC)
- Expired
- Jun 29, 2012, 7:30 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 205 counties
Bath County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming County, KY, Floyd County, KY, Franklin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Johnson County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Pike County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Wolfe County, KY, Allegany County, MD, Charles County, MD, Frederick County, MD, Garrett County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Clermont County, OH, Coshocton County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Fayette County, PA, Greene County, PA, Somerset County, PA, Washington County, PA, Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Charlotte County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Radford, VA, City of Richmond, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, Henrico County, VA, Highland County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Loudoun County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince William County, VA, Pulaski County, VA, Rappahannock County, VA, Richmond County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Barbour County, WV, Berkeley County, WV, Boone County, WV, Braxton County, WV, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Jefferson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Morgan County, WV, Nicholas County, WV, Ohio County, WV, Pendleton County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 75 km from the middle of the area, began a volume at 22:04 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
Pittsburgh, PA (KPIT), launched 12:00Z, 10.1 hours before the alert went out and 197 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
- 2131 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1114 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
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 |
|---|---|---|---|---|
| Jun 29, 2:01 PM EDT | Mesoscale Discussion | SPC | Boone, Campbell, Gallatin, Kenton | 119 min |
| Jun 29, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | Boone, Boyd, Bracken, Campbell, Carter, Gallatin and 7 more | 5 hr |
| Jun 29, 4:22 PM EDT | Mesoscale Discussion | SPC | Boone, Boyd, Bracken, Campbell, Carter, Fleming and 9 more | 83 min |
| Jun 29, 6:34 PM EDT | Severe Thunderstorm Watch | SPC | Lawrence | 6 hr |
| Jun 29, 7:51 PM EDT | Mesoscale Discussion | SPC | Breathitt, Floyd, Johnson, Knott, Magoffin, Martin and 2 more | 114 min |
| Jun 29, 4:34 AM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Harford and 5 more | 3 hr |
| Jun 28, 8:53 PM EDT | Mesoscale Discussion | SPC | Ashtabula, Cuyahoga, Erie, Geauga, Huron, Lake and 5 more | 97 min |
| Jun 29, 10:22 AM EDT | Mesoscale Discussion | SPC | Darke, Mercer | 2 hr |
| Jun 29, 11:49 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Paulding, Putnam, Van Wert | 6 hr |
| Jun 29, 3:07 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Athens, Auglaize, Belmont, Brown and 58 more | 53 min |
| Jun 29, 12:45 AM EDT | Mesoscale Discussion | SPC | Armstrong, Blair, Butler, Cambria, Cameron, Centre and 18 more | 90 min |
| Jun 29, 3:41 AM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Columbia, Cumberland and 19 more | 94 min |
Nearby
Mesoscale Discussions in Virginia, 2012Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Kentucky, 2012Every mesoscale discussion in 2012
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.