Alert archive / North Carolina / Mesoscale Discussions in 2022

Mesoscale Discussion 613

May 1, 202229 counties in North Carolina; 27 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 1, 2022, 6:43 PM EDT for 29 counties in North Carolina; 27 counties in Virginia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 1, 2022, 6:43 PM EDT (22:43 UTC)
Expired: May 1, 2022, 8:15 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 167

All 56 counties

Alamance County, NC, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Caldwell County, NC, Caswell County, NC, Catawba County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Iredell County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Stokes County, NC, Surry County, NC, Vance County, NC, Warren County, NC, Wilkes County, NC, Yadkin County, NC, Amelia County, VA, Brunswick County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Danville, VA, City of Emporia, VA, City of Galax, VA, City of Martinsville, VA, City of Petersburg, VA, Dinwiddie County, VA, Floyd County, VA, Franklin County, VA, Grayson County, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA, Smyth County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 62 km from the middle of the area, began a volume at 22:44 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.7 hours before the alert went out and 53 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: 715 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 14 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.

Issued	Product	Office	Counties	Lasted
May 1, 1:04 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Alleghany, Burke, Cabarrus, Caldwell and 32 more	56 min
May 1, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	Alamance, Alexander, Alleghany, Ashe, Burke, Caldwell and 28 more	7 hr
May 1, 3:33 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Alleghany, Caldwell, Caswell, Catawba and 19 more	57 min

Nearby

Mesoscale Discussions in North Carolina, 2022 Mesoscale Discussions in Virginia, 2022 Every mesoscale discussion in 2022

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.