Alert archive / Virginia / Mesoscale Discussions in 2005

Mesoscale Discussion 1992

August 16, 200514 counties in North Carolina; 49 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2005, 3:09 PM EDT for 14 counties in North Carolina; 49 counties in Virginia. It was in force for 36 min.

The area

The outline as issued.

The facts

Issued
Aug 16, 2005, 3:09 PM EDT (19:09 UTC)
Expired
Aug 16, 2005, 3:45 PM EDT
In force
36 min
Issued by
the Storm Prediction Center
All 63 counties

Bertie County, NC, Camden County, NC, Chowan County, NC, Currituck County, NC, Edgecombe County, NC, Gates County, NC, Halifax County, NC, Hertford County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Warren County, NC, Amelia County, VA, Brunswick County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, 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, Cumberland County, VA, Dinwiddie County, VA, Essex 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 William County, VA, Lancaster County, VA, Louisa County, VA, Lunenburg County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince George County, VA, Richmond County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, Westmoreland County, VA, York County, VA

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, 7.2 hours before the alert went out and 185 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, Roanoke, VA at 12:00Z on 2005-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1568 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, Roanoke, VA at 12:00Z on 2005-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.1939Sfc1 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
1568 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
83 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.

IssuedProductOfficeCountiesLasted
Aug 16, 1:30 PM EDTSevere Thunderstorm WatchSPCAlleghany, Ashe, Caswell, Person, Rockingham, Stokes and 1 more8 hr
Aug 16, 3:55 PM EDTSevere Thunderstorm WatchSPCBertie, Camden, Chowan, Currituck, Gates, Granville and 7 more6 hr
Aug 16, 5:02 PM EDTMesoscale DiscussionSPCAlleghany, Ashe, Caswell, Person, Rockingham, Stokes and 1 more58 min
Aug 16, 7:57 PM EDTMesoscale DiscussionSPCAlamance, Alexander, Bertie, Buncombe, Burke, Caldwell and 34 more93 min
Aug 16, 1:13 PM EDTMesoscale DiscussionSPCAlbemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 38 more62 min
Aug 16, 6:21 PM EDTMesoscale DiscussionSPCAmelia, Brunswick, Caroline, Charles City, Chesterfield, Dinwiddie and 41 more84 min

Nearby

Mesoscale Discussions in Virginia, 2005Mesoscale Discussions in North Carolina, 2005Every mesoscale discussion in 2005

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.