Alert archive / South Carolina / Mesoscale Discussions in 2022

Mesoscale Discussion 932

May 27, 202217 counties in North Carolina; 22 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 27, 2022, 5:00 AM EDT for 17 counties in North Carolina; 22 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2022, 5:00 AM EDT (09:00 UTC)
Expired
May 27, 2022, 7:00 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch unlikely
Chance of a watch
20%
All 39 counties

Anson County, NC, Cabarrus County, NC, Davidson County, NC, Davie County, NC, Gaston County, NC, Guilford County, NC, Hoke County, NC, Iredell County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Randolph County, NC, Richmond County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Bamberg County, SC, Berkeley County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Fairfield County, SC, Florence County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC, York County, SC

The radar

The Columbia radar (KCAE), 94 km from the middle of the area, began a volume at 09:01 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 00:00Z, 9.0 hours before the alert went out and 205 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 00:00Z on 2022-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 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 00:00Z on 2022-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 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
472 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
815 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.4

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, 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, 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

Nearby

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