Alert archive / North Carolina / Mesoscale Discussions in 2022

Mesoscale Discussion 935

May 27, 202220 counties in North Carolina; 16 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 27, 2022, 10:44 AM EDT for 20 counties in North Carolina; 16 counties in Virginia. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
May 27, 2022, 10:44 AM EDT (14:44 UTC)
Expired
May 27, 2022, 12:15 PM EDT
In force
91 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
60%
All 36 counties

Beaufort County, NC, Bertie County, NC, Camden County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Duplin County, NC, Gates County, NC, Hertford County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC, City of Chesapeake, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Gloucester County, VA, Isle of Wight County, VA, Mathews County, VA, Southampton County, VA, Surry County, VA, York County, VA

The radar

The Morehead City radar (KMHX), 110 km from the middle of the area, began a volume at 14:45 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

Newport, NC (KMHX), launched 12:00Z, 2.7 hours before the alert went out and 109 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, Newport, NC at 12:00Z on 2022-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 834 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, Newport, NC at 12:00Z on 2022-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 square meters per square second.193958Sfc1 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
834 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.0

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, 10:59 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, 4:26 PM EDTMesoscale DiscussionSPCAlamance, Bladen, Caswell, Chatham, Columbus, Cumberland and 24 more2 hr
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 North Carolina, 2022Mesoscale Discussions in Virginia, 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.