Alert archive / Virginia / Mesoscale Discussions in 2019

Mesoscale Discussion 943

June 2, 201951 counties in Virginia; 28 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2019, 12:24 PM EDT for 51 counties in Virginia; 28 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 2, 2019, 12:24 PM EDT (16:24 UTC)
Expired
Jun 2, 2019, 2:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 79 counties

Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Fauquier County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Goochland County, VA, Greene County, VA, Hanover County, VA, Highland County, VA, Louisa County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Powhatan County, VA, Prince Edward County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Warren County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hardy County, WV, Harrison County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Monroe County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV

The radar

The Roanoke radar (KFCX), 132 km from the middle of the area, began a volume at 16:25 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 4.4 hours before the alert went out and 111 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 2019-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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 2019-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.1939587897Sfc1 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
50 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
987 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
86 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 2, 12:53 PM EDTSevere Thunderstorm WatchSPCAlbemarle, Alleghany, Arlington, Augusta, Bath, Botetourt and 36 more7 hr
Jun 2, 3:33 PM EDTMesoscale DiscussionSPCAlbemarle, Alleghany, Amherst, Arlington, Augusta, Bath and 47 more87 min
Jun 2, 5:57 PM EDTMesoscale DiscussionSPCAccomack, Arlington, Caroline, Culpeper, Essex, Fairfax and 26 more93 min
Jun 2, 6:53 PM EDTMesoscale DiscussionSPCAlleghany, Amherst, Augusta, Bath, Botetourt, Craig and 9 more67 min

Nearby

Mesoscale Discussions in Virginia, 2019Mesoscale Discussions in West Virginia, 2019Every mesoscale discussion in 2019

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.