Alert archive / Virginia / Mesoscale Discussions in 2019

Mesoscale Discussion 347

April 14, 201914 counties in North Carolina; 26 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2019, 4:50 PM EDT for 14 counties in North Carolina; 26 counties in Virginia. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Apr 14, 2019, 4:50 PM EDT (20:50 UTC)
Expired
Apr 14, 2019, 6:15 PM EDT
In force
85 min
Issued by
the Storm Prediction Center
All 40 counties

Alexander County, NC, Caswell County, NC, Catawba County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Guilford County, NC, Iredell County, NC, Rockingham County, NC, Rowan County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Albemarle 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 Manassas, VA, City of Manassas Park, VA, City of Martinsville, VA, Culpeper County, VA, Cumberland County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Halifax County, VA, Henry County, VA, Louisa County, VA, Nelson County, VA, Orange County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA, Prince William County, VA

The radar

The Roanoke radar (KFCX), 46 km from the middle of the area, began a volume at 20:54 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.8 hours before the alert went out and 65 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, Greensboro/Hi Pt, NC at 12:00Z on 2019-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 59 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, Greensboro/Hi Pt, NC at 12:00Z on 2019-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.19395878Sfc1 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
59 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Apr 14, 11:48 AM EDTMesoscale DiscussionSPCAlexander, Cabarrus, Catawba, Cleveland, Davidson, Davie and 16 more117 min
Apr 14, 2:16 PM EDTTornado WatchSPCAlamance, Alexander, Alleghany, Anson, Burke, Cabarrus and 46 more8 hr
Apr 14, 3:00 PM EDTMesoscale DiscussionSPCCherokee, Graham, Swain2 hr
Apr 14, 4:28 PM EDTSevere Thunderstorm WatchSPCAvery, Buncombe, Cherokee, Clay, Graham, Haywood and 8 more6 hr
Apr 14, 5:43 PM EDTMesoscale DiscussionSPCAnson, Bladen, Brunswick, Columbus, Cumberland, Duplin and 11 more2 hr
Apr 14, 6:31 PM EDTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson3 hr
Apr 14, 7:12 PM EDTMesoscale DiscussionSPCAlexander, Alleghany, Ashe, Avery, Buncombe, Burke and 33 more2 hr
Apr 14, 7:21 PM EDTSevere Thunderstorm WatchSPCAshe, Watauga5 hr
Apr 14, 5:49 PM EDTMesoscale DiscussionSPCAlbemarle, Amelia, Amherst, Augusta, Buckingham, Caroline and 48 more26 min
Apr 14, 6:08 PM EDTTornado WatchSPCAlbemarle, Arlington, Augusta, Clarke, Culpeper, Fairfax and 28 more9 hr
Apr 14, 6:30 PM EDTMesoscale DiscussionSPCAlleghany, Bland, Craig, Giles, Montgomery, Pulaski and 6 more90 min
Apr 14, 7:42 PM EDTMesoscale DiscussionSPCArlington, Fairfax, Fauquier, Loudoun, Prince William, City of Alexandria and 4 more63 min

Nearby

Mesoscale Discussions in Virginia, 2019Mesoscale Discussions in North Carolina, 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.