Alert archive / Virginia / Mesoscale Discussions in 2016

Mesoscale Discussion 1278

July 14, 201627 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2016, 4:03 PM EDT for 27 counties in Virginia. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2016, 4:03 PM EDT (20:03 UTC)
Expired
Jul 14, 2016, 5:00 PM EDT
In force
57 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 27 counties

Albemarle County, VA, Amelia County, VA, Appomattox County, VA, Bedford County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Charlottesville, VA, City of Danville, VA, City of Lynchburg, VA, City of Martinsville, VA, Cumberland County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Halifax County, VA, Hanover County, VA, Henry County, VA, Louisa County, VA, Lunenburg County, VA, Nelson County, VA, Nottoway County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Spotsylvania County, VA

The radar

The Roanoke radar (KFCX), 113 km from the middle of the area, began a volume at 20:06 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, 8.1 hours before the alert went out and 44 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 2016-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 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 2016-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
448 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1009 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Virginia, 2016Every mesoscale discussion in 2016

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.