Alert archive / South Carolina / Mesoscale Discussions in 2021
Mesoscale Discussion 363
The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2021, 5:35 PM EDT for 15 counties in North Carolina; 17 counties in South Carolina. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2021, 5:35 PM EDT (21:35 UTC)
- Expired
- Apr 10, 2021, 7:30 PM EDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 32 counties
Anson County, NC, Cabarrus County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Stanly County, NC, Union County, NC, Abbeville County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC
The radar
The Columbia radar (KCAE), 93 km from the middle of the area, began a volume at 21:37 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, 9.6 hours before the alert went out and 177 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
190
ACUS11 KWNS 102135
SWOMCD
SPC MCD 102135
SCZ000-NCZ000-102330-
Mesoscale Discussion 0363
NWS Storm Prediction Center Norman OK
0435 PM CDT Sat Apr 10 2021
Areas affected...parts of South Carolina into North Carolina
Concerning...Severe potential...Watch unlikely
Valid 102135Z - 102330Z
Probability of Watch Issuance...20 percent
SUMMARY...An uptick in storm coverage and intensity is possible over
the next few hours, but the risk appears too low for watch
consideration.
DISCUSSION...An embedded lead wave is currently moving across
northern GA and into the western Carolinas, with a concentration of
shallow convection along the GA/SC border. Surface analysis shows
temperatures in the 70s F ahead of this feature, with low 60s F
dewpoints resulting in around 500 J/kg SBCAPE. Little lightning has
been noted as of late, due to relatively warm midlevel temperatures
and thus shallow nature of the convection.
Effective SRH near 200 m2/s2 exists over the western Carolinas,
along with 50 kt effective bulk shear. This may support weakly
rotating storms over the next few hours, before the boundary layer
stabilizes.
..Jewell.. 04/10/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...RAH...ILM...CAE...GSP...
LAT...LON 34378009 33968062 33768118 33828169 33998235 34478263
35068241 35578190 35808127 35928063 35778000 35317973
34787992 34378009Nearby
Mesoscale Discussions in South Carolina, 2021Mesoscale Discussions in North Carolina, 2021Every mesoscale discussion in 2021
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.