Alert archive / South Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 422
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2017, 4:00 PM EDT for 11 counties in North Carolina; 14 counties in South Carolina. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2017, 4:00 PM EDT (20:00 UTC)
- Expired
- Apr 3, 2017, 5:30 PM EDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 25 counties
Anson County, NC, Chatham County, NC, Cumberland County, NC, Harnett County, NC, Hoke County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Richmond County, NC, Robeson County, NC, Scotland County, NC, Berkeley County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 122 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 145 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1059 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 3, 2:07 PM EDT | Tornado Watch | SPC | Cabarrus, Mecklenburg, Rowan, Union | 6 hr |
| Apr 3, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | Anson, Bladen, Columbus, Cumberland, Harnett, Hoke and 10 more | 4 hr |
| Apr 3, 6:41 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 47 more | 64 min |
| Apr 3, 10:07 AM EDT | Mesoscale Discussion | SPC | Abbeville, Aiken, Allendale, Anderson, Barnwell, Edgefield and 5 more | 83 min |
| Apr 3, 1:42 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Calhoun, Edgefield and 5 more | 63 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.