Alert archive / South Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 1611
The Storm Prediction Center issued this mesoscale discussion at Sep 1, 2017, 3:06 PM EDT for 14 counties in Georgia; 24 counties in South Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2017, 3:06 PM EDT (19:06 UTC)
- Expired
- Sep 1, 2017, 5:30 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 38 counties
Appling County, GA, Bacon County, GA, Bryan County, GA, Bulloch County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Liberty County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Wayne County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 45 km from the middle of the area, began a volume at 19:07 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
Charleston AFB, SC (KCHS), launched 12:00Z, 7.1 hours before the alert went out and 81 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
- 1452 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 797 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.8
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 |
|---|---|---|---|---|
| Sep 1, 1:07 PM EDT | Mesoscale Discussion | SPC | Cherokee, Chester, Chesterfield, Fairfield, Lancaster, Spartanburg and 2 more | 113 min |
| Sep 1, 1:49 PM EDT | Tornado Watch | SPC | Cherokee, Chester, Chesterfield, Lancaster, Marlboro, Spartanburg and 2 more | 8 hr |
| Sep 1, 4:44 PM EDT | Mesoscale Discussion | SPC | Chesterfield, Lancaster, Marlboro, York | 91 min |
| Sep 1, 7:23 PM EDT | Mesoscale Discussion | SPC | Cherokee, York | 97 min |
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.