Alert archive / North Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 1612
The Storm Prediction Center issued this mesoscale discussion at Sep 1, 2017, 4:44 PM EDT for 28 counties in North Carolina; 4 counties in South Carolina. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2017, 4:44 PM EDT (20:44 UTC)
- Expired
- Sep 1, 2017, 6:15 PM EDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 32 counties
Alamance County, NC, Anson County, NC, Cabarrus County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Gaston County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC, Chesterfield County, SC, Lancaster County, SC, Marlboro County, SC, York County, SC
The radar
The Raleigh/Durham radar (KRAX), 119 km from the middle of the area, began a volume at 20:43 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.7 hours before the alert went out and 69 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
- 208 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 |
|---|---|---|---|---|
| Sep 1, 1:07 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Catawba, Chatham, Cleveland and 13 more | 113 min |
| Sep 1, 1:49 PM EDT | Tornado Watch | SPC | Alexander, Anson, Bladen, Burke, Cabarrus, Caldwell and 27 more | 8 hr |
| Sep 1, 7:23 PM EDT | Mesoscale Discussion | SPC | Alexander, Anson, Bladen, Burke, Cabarrus, Caldwell and 25 more | 97 min |
| Sep 1, 3:06 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 18 more | 2 hr |
Nearby
Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in South 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.