Alert archive / Virginia / Mesoscale Discussions in 2014

Mesoscale Discussion 940

June 10, 201433 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2014, 2:39 PM EDT for 33 counties in Virginia. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2014, 2:39 PM EDT (18:39 UTC)
Expired: Jun 10, 2014, 3:45 PM EDT
In force: 66 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 33 counties

Albemarle County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Charlottesville, VA, City of Fredericksburg, VA, City of Lynchburg, VA, City of Waynesboro, VA, Culpeper County, VA, Cumberland County, VA, Fauquier County, VA, Fluvanna County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Rappahannock County, VA, Shenandoah County, VA, Spotsylvania County, VA, Warren County, VA

The radar

The Norfolk radar (KAKQ), 159 km from the middle of the area, began a volume at 18:40 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, 6.7 hours before the alert went out and 106 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: 992 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 64 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 10, 3:24 PM EDT	Severe Thunderstorm Watch	SPC	Lee, Russell, Scott, Washington, Wise, City of Bristol and 1 more	8 hr
Jun 10, 4:57 PM EDT	Mesoscale Discussion	SPC	Lee	63 min
Jun 10, 6:14 PM EDT	Mesoscale Discussion	SPC	Buchanan, Dickenson, Lee, Russell, Scott, Smyth and 5 more	91 min
Jun 10, 7:10 PM EDT	Severe Thunderstorm Watch	SPC	Buchanan, Dickenson	5 hr

Nearby

Mesoscale Discussions in Virginia, 2014 Every mesoscale discussion in 2014

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.