Alert archive / Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 1731

July 9, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2003, 10:28 AM EDT for 5 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 9, 2003, 10:28 AM EDT (14:28 UTC)
Expired: Jul 9, 2003, 12:00 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 121 counties

Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Washington County, MD, Alamance County, NC, Alexander County, NC, Alleghany County, NC, Caldwell County, NC, Caswell County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Guilford County, NC, Iredell County, NC, Orange County, NC, Person County, NC, Rockingham County, NC, Rowan County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Adams County, PA, Franklin County, PA, York 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, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Carroll 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 Danville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Martinsville, 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, Fairfax County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, Henry County, VA, Highland County, VA, King George County, VA, Loudoun County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mecklenburg County, VA, Montgomery County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince William County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Berkeley County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Morgan County, WV, Pendleton County, WV

The radar

The Roanoke radar (KFCX), 112 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 44 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: 1142 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 72 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
Jul 8, 8:12 PM EDT	Mesoscale Discussion	SPC	Allegany, Carroll, Frederick, Garrett, Howard, Montgomery and 1 more	93 min
Jul 8, 8:30 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Frederick, Garrett, Washington	4 hr
Jul 8, 11:16 PM EDT	Mesoscale Discussion	SPC	Allegany	119 min
Jul 9, 11:50 AM EDT	Severe Thunderstorm Watch	SPC	Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 7 more	6 hr
Jul 9, 12:09 PM EDT	Mesoscale Discussion	SPC	Calvert, Caroline, Charles, Dorchester, Kent, Queen Anne's and 5 more	96 min
Jul 9, 1:15 PM EDT	Severe Thunderstorm Watch	SPC	Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 8 more	8 hr
Jul 9, 2:47 PM EDT	Mesoscale Discussion	SPC	Allegany, Baltimore, Carroll, Frederick, Garrett, Harford and 4 more	88 min
Jul 9, 3:48 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Calvert, Caroline, Charles, Dorchester, Kent and 7 more	117 min
Jul 9, 7:36 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Calvert, Caroline, Cecil, Charles, Dorchester and 8 more	114 min
Jul 9, 12:34 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Alleghany, Ashe, Avery, Buncombe and 34 more	116 min
Jul 9, 5:38 PM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Camden, Chatham, Chowan and 26 more	97 min
Jul 9, 6:00 PM EDT	Severe Thunderstorm Watch	SPC	Alamance, Beaufort, Bertie, Camden, Chatham, Chowan and 30 more	4 hr
Jul 9, 12:55 PM EDT	Mesoscale Discussion	SPC	Wise	3 hr

Nearby

Mesoscale Discussions in Virginia, 2003 Mesoscale Discussions in North Carolina, 2003 Mesoscale Discussions in Maryland, 2003 Every mesoscale discussion in 2003

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.