Alert archive / South Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 863
The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2018, 5:53 PM EDT for 4 states. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2018, 5:53 PM EDT (21:53 UTC)
- Expired
- Jun 24, 2018, 7:30 PM EDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 55 counties
Banks County, GA, Columbia County, GA, Elbert County, GA, Fannin County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Lincoln County, GA, Lumpkin County, GA, Madison County, GA, Rabun County, GA, Richmond County, GA, Stephens County, GA, Towns County, GA, Union County, GA, White County, GA, Wilkes County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Polk County, NC, Swain County, NC, Transylvania County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Blount County, TN, Loudon County, TN, Monroe County, TN
The radar
The Greer radar (KGSP), 37 km from the middle of the area, began a volume at 21:56 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 238 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
- 1582 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 |
|---|---|---|---|---|
| Jun 23, 9:23 PM EDT | Mesoscale Discussion | SPC | Giles, Lawrence, Lincoln, Wayne | 2 hr |
| Jun 24, 3:33 AM EDT | Mesoscale Discussion | SPC | Chester, Fayette, Hardeman, Haywood, Lauderdale, McNairy and 3 more | 87 min |
| Jun 24, 7:39 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Crockett, Dickson, Dyer, Gibson and 13 more | 2 hr |
Nearby
Mesoscale Discussions in South Carolina, 2018Mesoscale Discussions in Georgia, 2018Mesoscale Discussions in North Carolina, 2018Every mesoscale discussion in 2018
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.