Alert archive / Virginia / Mesoscale Discussions in 2007

Mesoscale Discussion 1094

June 11, 20078 counties in North Carolina; 43 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2007, 1:56 PM EDT for 8 counties in North Carolina; 43 counties in Virginia. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2007, 1:56 PM EDT (17:56 UTC)
Expired: Jun 11, 2007, 3:00 PM EDT
In force: 64 min
Issued by: the Storm Prediction Center

All 51 counties

Caswell County, NC, Forsyth County, NC, Guilford County, NC, Person County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Yadkin County, NC, Albemarle County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Carroll County, VA, Charlotte County, VA, Chesterfield County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Danville, VA, City of Fredericksburg, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Richmond, VA, City of Roanoke, VA, City of Salem, VA, City of Waynesboro, VA, Culpeper County, VA, Cumberland County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, Henry County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mecklenburg County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Spotsylvania County, VA

The radar

The Roanoke radar (KFCX), 121 km from the middle of the area, began a volume at 17:56 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

Roanoke, VA (KRNK), launched 12:00Z, 5.9 hours before the alert went out and 49 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: 64 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 79 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
Jun 11, 12:05 PM EDT	Mesoscale Discussion	SPC	Cleveland	55 min
Jun 11, 1:31 PM EDT	Severe Thunderstorm Watch	SPC	Cabarrus, Mecklenburg, Rowan, Union	10 hr
Jun 11, 7:49 PM EDT	Mesoscale Discussion	SPC	Anson, Cabarrus, Chatham, Davidson, Mecklenburg, Montgomery and 7 more	86 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.