Alert archive / Virginia / Mesoscale Discussions in 2016
Mesoscale Discussion 1743
The Storm Prediction Center issued this mesoscale discussion at Sep 29, 2016, 1:34 PM EDT for 8 counties in North Carolina; 20 counties in Virginia; 4 counties in West Virginia. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Sep 29, 2016, 1:34 PM EDT (17:34 UTC)
- Expired
- Sep 29, 2016, 3:30 PM EDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 32 counties
Davidson County, NC, Davie County, NC, Forsyth County, NC, Iredell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Yadkin County, NC, Alleghany County, VA, Bland County, VA, Botetourt County, VA, Carroll County, VA, City of Covington, VA, City of Galax, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Wythe County, VA, Greenbrier County, WV, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 28 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 89 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
- 174 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 686 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 28, 9:26 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Alleghany, Ashe, Cabarrus, Caldwell and 32 more | 64 min |
Nearby
Mesoscale Discussions in Virginia, 2016Mesoscale Discussions in North Carolina, 2016Mesoscale Discussions in West Virginia, 2016Every mesoscale discussion in 2016
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.