Alert archive / Virginia / Mesoscale Discussions in 2007

Mesoscale Discussion 26

January 6, 200710 counties in North Carolina; 38 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jan 6, 2007, 3:11 AM EST for 10 counties in North Carolina; 38 counties in Virginia. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jan 6, 2007, 3:11 AM EST (08:11 UTC)
Expired: Jan 6, 2007, 4:15 AM EST
In force: 64 min
Issued by: the Storm Prediction Center

All 48 counties

Bertie County, NC, Camden County, NC, Chowan County, NC, Currituck County, NC, Gates County, NC, Hertford County, NC, Martin County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Brunswick 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, Dinwiddie County, VA, Essex 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 William County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 42 km from the middle of the area, began a volume at 08:11 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 00:00Z, 8.2 hours before the alert went out and 163 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: 23 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 559 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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.

Issued	Product	Office	Counties	Lasted
Jan 5, 9:01 PM EST	Mesoscale Discussion	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more	89 min
Jan 5, 10:16 PM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Chowan, Craven, Currituck and 20 more	89 min
Jan 6, 12:58 AM EST	Tornado Watch	SPC	Cumberland, Durham, Edgecombe, Franklin, Granville, Halifax and 12 more	3 hr
Jan 6, 4:15 AM EST	Tornado Watch	SPC	Bertie, Camden, Chowan, Currituck, Gates, Hertford and 2 more	107 min
Jan 6, 5:19 AM EST	Mesoscale Discussion	SPC	Camden, Currituck, Pasquotank, Perquimans	56 min

Nearby

Mesoscale Discussions in Virginia, 2007 Mesoscale Discussions in North Carolina, 2007 Every mesoscale discussion in 2007

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.