Alert archive / South Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 1737
The Storm Prediction Center issued this mesoscale discussion at Oct 23, 2017, 1:07 PM EDT for Burke County, Columbia County, Richmond County, Georgia; 21 counties in North Carolina; 25 counties in South Carolina. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Oct 23, 2017, 1:07 PM EDT (17:07 UTC)
- Expired
- Oct 23, 2017, 3:00 PM EDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 49 counties
Burke County, GA, Columbia County, GA, Richmond County, GA, Alexander County, NC, Anson County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Stanly County, NC, Union County, NC, Wilkes County, NC, Yadkin County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, York County, SC
The radar
The Columbia radar (KCAE), 57 km from the middle of the area, began a volume at 17:07 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 5.1 hours before the alert went out and 213 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
- 252 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Oct 23, 2:00 PM EDT | Tornado Watch | SPC | Burke, Columbia, Jenkins, Lincoln, McDuffie, Richmond and 1 more | 8 hr |
| Oct 23, 4:33 PM EDT | Mesoscale Discussion | SPC | Burke, Jenkins, Richmond | 57 min |
| Oct 23, 5:40 PM EDT | Tornado Watch | SPC | Alamance, Chatham, Cumberland, Durham, Edgecombe, Franklin and 18 more | 8 hr |
| Oct 23, 6:59 PM EDT | Mesoscale Discussion | SPC | Anson, Bladen, Cabarrus, Columbus, Davidson, Davie and 12 more | 91 min |
| Oct 23, 7:34 PM EDT | Mesoscale Discussion | SPC | Alamance, Bladen, Caswell, Chatham, Cumberland, Durham and 19 more | 116 min |
Nearby
Mesoscale Discussions in South Carolina, 2017Mesoscale Discussions in North 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.