Alert archive / South Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 454
The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2017, 11:34 PM EDT for Elbert County, Lincoln County, Wilkes County, Georgia; 12 counties in South Carolina. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2017, 11:34 PM EDT (03:34 UTC)
- Expired
- Apr 6, 2017, 12:30 AM EDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Elbert County, GA, Lincoln County, GA, Wilkes County, GA, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Spartanburg County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 50 km from the middle of the area, began a volume at 03:35 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.6 hours before the alert went out and 239 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
- 723 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 594 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- 354 m²/s²
- 0-3 km storm-relative helicity
- 356 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 9.8
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 |
|---|---|---|---|---|
| Apr 5, 9:58 PM EDT | Tornado Watch | SPC | Bibb, Butts, Chattahoochee, Clayton, Coweta, Crawford and 27 more | 3 hr |
| Apr 5, 11:15 PM EDT | Mesoscale Discussion | SPC | Charlton, Echols | 2 hr |
| Apr 5, 11:50 PM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Bleckley, Burke, Clarke, Columbia, Elbert and 24 more | 6 hr |
| Apr 6, 12:15 AM EDT | Tornado Watch | SPC | Brantley, Camden, Charlton, Clinch, Echols, Glynn and 1 more | 6 hr |
| Apr 6, 2:54 AM EDT | Mesoscale Discussion | SPC | Burke, Columbia, Dodge, Emanuel, Jefferson, Jenkins and 4 more | 96 min |
| Apr 6, 3:12 AM EDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 12 more | 2 hr |
Nearby
Mesoscale Discussions in South Carolina, 2017Mesoscale Discussions in Georgia, 2017Every mesoscale discussion in 2017
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.