Alert archive / South Carolina / Mesoscale Discussions in 2009
Mesoscale Discussion 478
The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2009, 11:22 AM EDT for 9 counties in Georgia; 24 counties in North Carolina; 28 counties in South Carolina. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2009, 11:22 AM EDT (15:22 UTC)
- Expired
- Apr 14, 2009, 12:45 PM EDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 61 counties
Bulloch County, GA, Burke County, GA, Columbia County, GA, Effingham County, GA, Jefferson County, GA, Jenkins County, GA, McDuffie County, GA, Richmond County, GA, Screven County, GA, Beaufort County, NC, Bladen County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Edgecombe County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Onslow County, NC, Pender County, NC, Pitt County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wayne County, NC, Wilson County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield 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, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 115 km from the middle of the area, began a volume at 15:24 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, 3.4 hours before the alert went out and 147 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
- 122 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 736 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
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Mesoscale Discussions in South Carolina, 2009Mesoscale Discussions in North Carolina, 2009Mesoscale Discussions in Georgia, 2009Every mesoscale discussion in 2009
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.