Alert archive / Virginia / Mesoscale Discussions in 2022

Mesoscale Discussion 941

May 27, 202230 counties in North Carolina; Dillon County, Horry County, South Carolina; 38 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 27, 2022, 4:26 PM EDT for 30 counties in North Carolina; Dillon County, Horry County, South Carolina; 38 counties in Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2022, 4:26 PM EDT (20:26 UTC)
Expired
May 27, 2022, 6:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
40%
All 70 counties

Alamance County, NC, Bladen County, NC, Caswell County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Person County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC, Dillon County, SC, Horry County, SC, Albemarle County, VA, Amelia County, VA, Appomattox County, VA, Brunswick County, VA, Buckingham County, VA, Caroline County, VA, Charles City County, VA, Charlotte County, VA, Chesterfield County, VA, City of Charlottesville, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Fredericksburg, VA, City of Hopewell, VA, City of Petersburg, VA, City of Richmond, VA, Cumberland County, VA, Dinwiddie County, VA, Fluvanna County, VA, Goochland County, VA, Greensville County, VA, Halifax County, VA, Hanover County, VA, Henrico County, VA, King William County, VA, Louisa County, VA, Lunenburg County, VA, Mecklenburg County, VA, New Kent County, VA, Nottoway County, VA, Orange County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Southampton County, VA, Spotsylvania County, VA, Surry County, VA, Sussex County, VA

The radar

The Raleigh/Durham radar (KRAX), 18 km from the middle of the area, began a volume at 20:30 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, 8.4 hours before the alert went out and 118 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 2022-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 2022-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 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
3 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-78 m²/s²
0-3 km storm-relative helicity
-4 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
May 26, 8:32 PM EDTMesoscale DiscussionSPCAlexander, Cabarrus, Catawba, Davidson, Davie, Forsyth and 8 more118 min
May 27, 5:00 AM EDTMesoscale DiscussionSPCAnson, Cabarrus, Davidson, Davie, Gaston, Guilford and 11 more2 hr
May 27, 6:01 AM EDTMesoscale DiscussionSPCAlamance, Caswell, Durham, Franklin, Granville, Guilford and 6 more119 min
May 27, 6:24 AM EDTTornado WatchSPCAlamance, Anson, Caswell, Chatham, Davidson, Durham and 25 more8 hr
May 27, 8:13 AM EDTMesoscale DiscussionSPCAlamance, Caswell, Chatham, Durham, Franklin, Granville and 12 more2 hr
May 27, 10:44 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Currituck and 14 more91 min
May 27, 10:59 AM EDTMesoscale DiscussionSPCEdgecombe, Halifax, Nash, Northampton, Warren, Wilson91 min
May 27, 11:50 AM EDTTornado WatchSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 13 more4 hr
May 27, 2:21 PM EDTMesoscale DiscussionSPCBladen, Chatham, Columbus, Cumberland, Duplin, Durham and 20 more84 min
May 27, 3:38 PM EDTMesoscale DiscussionSPCAlleghany, Ashe, Surry97 min
May 27, 5:45 PM EDTSevere Thunderstorm WatchSPCEdgecombe, Franklin, Halifax, Johnston, Nash, Northampton and 4 more4 hr
May 27, 7:22 PM EDTMesoscale DiscussionSPCAlbemarle, Amelia, Appomattox, Arlington, Brunswick, Buckingham and 46 more83 min

Nearby

Mesoscale Discussions in Virginia, 2022Mesoscale Discussions in North Carolina, 2022Mesoscale Discussions in South Carolina, 2022Every 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.