Alert archive / South Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 443
The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2017, 2:02 PM EDT for Columbus County, North Carolina; 6 counties in South Carolina. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2017, 2:02 PM EDT (18:02 UTC)
- Expired
- Apr 5, 2017, 3:00 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Columbus County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Lee County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 104 km from the middle of the area, began a volume at 18:04 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, 6.0 hours before the alert went out and 151 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
- 626 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.2
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, 2:45 PM EDT | Tornado Watch | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson | 5 hr |
| Apr 5, 4:23 PM EDT | Mesoscale Discussion | SPC | Bladen, Columbus | 97 min |
| Apr 5, 7:57 PM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham, Swain | 48 min |
| Apr 5, 10:25 AM EDT | Mesoscale Discussion | SPC | Abbeville, Aiken, Allendale, Bamberg, Barnwell, Calhoun and 6 more | 95 min |
| Apr 5, 10:43 AM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Calhoun, Clarendon and 10 more | 2 hr |
| Apr 5, 11:38 AM EDT | Mesoscale Discussion | SPC | Allendale, Hampton | 97 min |
| Apr 5, 12:54 PM EDT | Tornado Watch | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 18 more | 10 hr |
| Apr 5, 3:12 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Barnwell, Edgefield, Lexington, McCormick and 2 more | 93 min |
| Apr 5, 6:29 PM EDT | Mesoscale Discussion | SPC | Beaufort, Berkeley, Colleton, Georgetown, Jasper | 61 min |
Nearby
Mesoscale Discussions in South Carolina, 2017Mesoscale Discussions in North Carolina, 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.