Alert archive / Virginia / Mesoscale Discussions in 2013

Mesoscale Discussion 1055

June 13, 20137 states

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2013, 2:40 AM EDT for 7 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 13, 2013, 2:40 AM EDT (06:40 UTC)
Expired
Jun 13, 2013, 4:45 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 214 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Frederick County, MD, Garrett County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Washington County, MD, Wicomico County, MD, Worcester County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ, Athens County, OH, Belmont County, OH, Butler County, OH, Carroll County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Fayette County, OH, Gallia County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Ross County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Adams County, PA, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Centre County, PA, Chester County, PA, Clarion County, PA, Clearfield County, PA, Crawford County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lancaster County, PA, Lawrence County, PA, Lebanon County, PA, Mercer County, PA, Mifflin County, PA, Montgomery County, PA, Perry County, PA, Philadelphia County, PA, Snyder County, PA, Somerset County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, York County, PA, Accomack County, VA, Albemarle County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Hampton, VA, City of Harrisonburg, VA, City of Hopewell, VA, City of Manassas, VA, City of Manassas Park, VA, City of Newport News, VA, City of Poquoson, VA, City of Richmond, VA, City of Staunton, VA, City of Waynesboro, VA, City of Williamsburg, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Frederick County, VA, Gloucester County, VA, Goochland County, VA, Greene County, VA, Hanover County, VA, Henrico County, VA, Highland County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Loudoun County, VA, Louisa County, VA, Madison County, VA, Mathews County, VA, Middlesex County, VA, Nelson County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Orange County, VA, Page County, VA, Powhatan County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, York County, VA, Barbour County, WV, Berkeley County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hancock County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Jefferson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Nicholas County, WV, Ohio County, WV, Pendleton County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Sterling radar (KLWX), 105 km from the middle of the area, began a volume at 06:42 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 6.7 hours before the alert went out and 113 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2013-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 699 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2013-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
699 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1879 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.5

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.

IssuedProductOfficeCountiesLasted
Jun 13, 5:27 AM EDTMesoscale DiscussionSPCKent, New Castle, Sussex2 hr
Jun 13, 7:30 AM EDTSevere Thunderstorm WatchSPCKent, New Castle, Sussex4 hr
Jun 13, 8:10 AM EDTMesoscale DiscussionSPCKent, New Castle, Sussex95 min
Jun 13, 11:38 AM EDTMesoscale DiscussionSPCSussex67 min
Jun 13, 12:19 PM EDTSevere Thunderstorm WatchSPCKent, Sussex7 hr
Jun 13, 4:22 PM EDTMesoscale DiscussionSPCSussex53 min
Jun 12, 11:22 PM EDTMesoscale DiscussionSPCAllegany, Garrett53 min
Jun 12, 11:53 PM EDTSevere Thunderstorm Watch PDSSPCGarrett7 hr
Jun 13, 3:58 AM EDTSevere Thunderstorm WatchSPCAllegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 7 more7 hr
Jun 13, 11:59 AM EDTMesoscale DiscussionSPCGarrett61 min
Jun 13, 2:08 PM EDTSevere Thunderstorm Watch PDSSPCDorchester, Somerset, Wicomico, Worcester8 hr
Jun 13, 2:20 PM EDTMesoscale DiscussionSPCAnne Arundel, Howard, Kent, Montgomery, Prince George's, City of Baltimore55 min
Jun 12, 8:05 PM EDTMesoscale DiscussionSPCAshland, Belmont, Carroll, Coshocton, Crawford, Delaware and 15 more55 min
Jun 12, 9:47 PM EDTMesoscale DiscussionSPCAllen, Ashland, Auglaize, Butler, Champaign, Clark and 39 more88 min
Jun 13, 12:50 AM EDTMesoscale DiscussionSPCAllen, Ashland, Auglaize, Champaign, Clark, Crawford and 32 more85 min
Jun 13, 8:32 AM EDTMesoscale DiscussionSPCAdams, Brown, Butler, Clermont, Clinton, Fayette and 11 more58 min
Jun 13, 9:08 AM EDTSevere Thunderstorm WatchSPCAdams, Athens, Brown, Clermont, Fayette, Gallia and 11 more5 hr
Jun 13, 1:53 PM EDTMesoscale DiscussionSPCAmelia, Brunswick, Charles City, Charlotte, Chesterfield, Cumberland and 42 more97 min

Nearby

Mesoscale Discussions in Virginia, 2013Mesoscale Discussions in Pennsylvania, 2013Mesoscale Discussions in West Virginia, 2013Every mesoscale discussion in 2013

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.