Alert archive / North Carolina / Mesoscale Discussions in 2022
Mesoscale Discussion 856
The Storm Prediction Center issued this mesoscale discussion at May 21, 2022, 3:34 PM EDT for 30 counties in North Carolina; Chesterfield County, Lancaster County, Marlboro County, South Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 21, 2022, 3:34 PM EDT (19:34 UTC)
- Expired
- May 21, 2022, 6:00 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 33 counties
Alamance County, NC, Anson County, NC, Cabarrus County, NC, Caswell County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Chesterfield County, SC, Lancaster County, SC, Marlboro County, SC
The radar
The Raleigh/Durham radar (KRAX), 108 km from the middle of the area, began a volume at 19:36 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, 7.6 hours before the alert went out and 79 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.
- Mixed-layer CAPE
- 908 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1340 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -99 m²/s²
- 0-3 km storm-relative helicity
- -94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 12:56 PM EDT | Mesoscale Discussion | SPC | Aiken, Bamberg, Barnwell, Beaufort, Berkeley, Calhoun and 23 more | 2 hr |
Nearby
Mesoscale 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.