Alert archive / South Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 776
The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 11:05 PM EDT for 23 counties in South Carolina. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 5, 2003, 11:05 PM EDT (03:05 UTC)
- Expired
- May 6, 2003, 2:00 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Aiken County, SC, Berkeley County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenwood County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 77 km from the middle of the area, began a volume at 03:07 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 00:00Z, 3.1 hours before the alert went out and 107 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
- 2251 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 10.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 1:55 AM EDT | Tornado Watch | SPC | Abbeville, Aiken, Allendale, Bamberg, Barnwell, Calhoun and 24 more | 6 hr |
| May 6, 2:53 AM EDT | Mesoscale Discussion | SPC | Abbeville, Aiken, Barnwell, Calhoun, Chester, Chesterfield and 22 more | 2 hr |
| May 6, 6:23 AM EDT | Mesoscale Discussion | SPC | Aiken, Dillon, Florence, Sumter | 2 hr |
| May 6, 1:30 PM EDT | Tornado Watch | SPC | Abbeville, Anderson, Greenwood, Laurens, McCormick | 7 hr |
| May 6, 2:18 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 27 more | 117 min |
| May 6, 2:40 PM EDT | Tornado Watch | SPC | Aiken, Allendale, Bamberg, Barnwell, Berkeley, Calhoun and 20 more | 5 hr |
| May 6, 4:41 PM EDT | Mesoscale Discussion | SPC | Abbeville, Aiken, Allendale, Anderson, Bamberg, Barnwell and 23 more | 2 hr |
Nearby
Mesoscale Discussions in South Carolina, 2003Every mesoscale discussion in 2003
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.