Alert archive / Virginia / Mesoscale Discussions in 2006

Mesoscale Discussion 463

April 7, 200632 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2006, 10:21 PM EDT for 32 counties in Virginia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Apr 7, 2006, 10:21 PM EDT (02:21 UTC)
Expired: Apr 7, 2006, 11:15 PM EDT
In force: 54 min
Issued by: the Storm Prediction Center

All 32 counties

Albemarle County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Harrisonburg, VA, City of Lynchburg, VA, City of Staunton, VA, City of Waynesboro, VA, Culpeper County, VA, Cumberland County, VA, Fluvanna County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mecklenburg County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Rockingham County, VA

The radar

The Roanoke radar (KFCX), 159 km from the middle of the area, began a volume at 02:22 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.4 hours before the alert went out and 212 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2865 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 219 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
Apr 8, 12:06 AM EDT	Mesoscale Discussion	SPC	Alleghany, Amherst, Appomattox, Bedford, Bland, Botetourt and 24 more	54 min
Apr 8, 8:30 AM EDT	Mesoscale Discussion	SPC	Amelia, Brunswick, Charles City, Chesterfield, Dinwiddie, Gloucester and 29 more	2 hr

Nearby

Mesoscale Discussions in Virginia, 2006 Every mesoscale discussion in 2006

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.