Alert archive / Virginia / Mesoscale Discussions in 2008

Mesoscale Discussion 2389

November 15, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Nov 15, 2008, 11:07 AM EST for 4 states. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Nov 15, 2008, 11:07 AM EST (16:07 UTC)
Expired: Nov 15, 2008, 12:00 PM EST
In force: 53 min
Issued by: the Storm Prediction Center

All 104 counties

Kent County, DE, Sussex County, DE, 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, Bertie County, NC, Chowan County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Halifax County, NC, Hertford County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wilson County, NC, Accomack County, VA, Amelia 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 Virginia Beach, VA, City of Williamsburg, VA, Culpeper County, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Gloucester County, VA, Goochland 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, Louisa County, VA, Lunenburg County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Orange County, VA, Powhatan County, VA, Prince Edward 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), 53 km from the middle of the area, began a volume at 16:07 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 12:00Z, 4.1 hours before the alert went out and 177 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: 13 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 430 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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
Nov 15, 12:22 PM EST	Tornado Watch	SPC	Kent, New Castle, Sussex	7 hr
Nov 15, 6:15 PM EST	Mesoscale Discussion	SPC	Kent, Sussex	2 hr
Nov 14, 10:25 PM EST	Tornado Watch	SPC	Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson	8 hr
Nov 14, 11:53 PM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 33 more	2 hr
Nov 15, 12:24 AM EST	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chatham, Chowan and 41 more	9 hr
Nov 15, 3:10 AM EST	Mesoscale Discussion	SPC	Anson, Beaufort, Bertie, Bladen, Brunswick, Camden and 40 more	95 min
Nov 15, 4:10 AM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 26 more	65 min
Nov 15, 7:09 AM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 14 more	66 min
Nov 15, 12:29 PM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Columbus, Craven and 27 more	61 min
Nov 15, 1:25 PM EST	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 33 more	7 hr

Nearby

Mesoscale Discussions in Virginia, 2008 Mesoscale Discussions in North Carolina, 2008 Mesoscale Discussions in Maryland, 2008 Every mesoscale discussion in 2008

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.