Alert archive / Virginia / Mesoscale Discussions in 2013

Mesoscale Discussion 1024

June 10, 201316 counties in Maryland; 4 counties in North Carolina; 54 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2013, 6:49 PM EDT for 16 counties in Maryland; 4 counties in North Carolina; 54 counties in Virginia. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2013, 6:49 PM EDT (22:49 UTC)
Expired: Jun 10, 2013, 8:15 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center

All 74 counties

Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Charles County, MD, City of Baltimore, MD, Dorchester 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, Wicomico County, MD, Gates County, NC, Halifax County, NC, Hertford County, NC, Northampton County, NC, Accomack County, VA, Arlington County, VA, Brunswick County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Fairfax, VA, City of Falls Church, VA, City of Franklin, VA, City of Fredericksburg, VA, City of Hampton, VA, City of Hopewell, VA, City of Manassas, VA, City of Manassas Park, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Williamsburg, VA, Dinwiddie County, VA, Essex County, VA, Fairfax County, VA, Gloucester County, VA, Greensville County, VA, Hanover County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Prince George County, VA, Prince William County, VA, Richmond County, VA, Southampton County, VA, Spotsylvania County, VA, Stafford County, VA, Surry County, VA, Sussex County, VA, Westmoreland County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 81 km from the middle of the area, began a volume at 22:49 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 nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.8 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: 470 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 63 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
Jun 10, 12:56 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more	2 hr
Jun 10, 2:02 PM EDT	Tornado Watch	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more	10 hr
Jun 10, 4:38 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more	97 min
Jun 10, 11:31 AM EDT	Mesoscale Discussion	SPC	Anson, Cabarrus, Chatham, Cleveland, Cumberland, Davidson and 18 more	119 min
Jun 10, 1:18 PM EDT	Tornado Watch	SPC	Alamance, Alexander, Anson, Bladen, Brunswick, Burke and 47 more	9 hr
Jun 10, 4:03 PM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 20 more	87 min
Jun 10, 5:47 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Brunswick, Chowan, Columbus, Craven and 14 more	58 min
Jun 10, 6:27 PM EDT	Mesoscale Discussion	SPC	Graham	93 min
Jun 10, 7:20 PM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 14 more	85 min
Jun 10, 2:32 PM EDT	Mesoscale Discussion	SPC	Lee	88 min
Jun 10, 3:02 PM EDT	Severe Thunderstorm Watch	SPC	Buchanan, Dickenson, Lee, Russell, Scott, Washington and 3 more	7 hr

Nearby

Mesoscale Discussions in Virginia, 2013 Mesoscale Discussions in Maryland, 2013 Mesoscale Discussions in North Carolina, 2013 Every 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.