Alert archive / Virginia / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 360
The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2016, 3:53 PM EDT for 9 counties in North Carolina; 29 counties in Virginia; Mercer County, Monroe County, Summers County, West Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2016, 3:53 PM EDT (19:53 UTC)
- Expired
- Jul 8, 2016, 8:35 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Alleghany County, NC, Ashe County, NC, Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Appomattox County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Danville, VA, City of Galax, VA, City of Lynchburg, 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, Grayson County, VA, Halifax County, VA, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 19 km from the middle of the area, began a volume at 19:52 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 4:00 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Giles, Pulaski | 45 min |
| Jul 8, 4:17 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Carroll, Grayson, Wythe, City of Galax | 58 min |
| Jul 8, 4:57 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Bedford, Botetourt, Campbell, Craig, Franklin and 3 more | 63 min |
| Jul 8, 4:58 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Grayson, City of Galax | 62 min |
| Jul 8, 5:05 PM EDT | Severe Thunderstorm Warning | RNK | Floyd, Franklin, Montgomery, Patrick, Pulaski, Roanoke | 55 min |
| Jul 8, 5:37 PM EDT | Severe Thunderstorm Warning | RNK | Henry, Pittsylvania, City of Martinsville | 53 min |
| Jul 8, 5:48 PM EDT | Severe Thunderstorm Warning | RNK | Rockingham, Stokes, Surry | 72 min |
| Jul 8, 6:05 PM EDT | Severe Thunderstorm Warning | RNK | Caswell | 70 min |
| Jul 8, 6:24 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Ashe, Watauga, Wilkes | 66 min |
| Jul 8, 6:34 PM EDT | Severe Thunderstorm Warning | RNK | Caswell | 56 min |
| Jul 8, 6:52 PM EDT | Severe Thunderstorm Warning | RNK | Caswell, Rockingham, Stokes | 38 min |
| Jul 8, 7:06 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Surry, Wilkes, Yadkin | 54 min |
| Jul 8, 7:54 PM EDT | Severe Thunderstorm Warning | RNK | Rockingham, Stokes, Surry, Yadkin | 33 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 7.9 hours before the alert went out and 80 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
- 163 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 3:32 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Burke, Caldwell and 12 more | 88 min |
| Jul 8, 5:48 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Buncombe, Burke, Cabarrus, Caldwell and 49 more | 57 min |
| Jul 8, 6:15 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Anson, Avery, Beaufort, Bertie and 68 more | 6 hr |
| Jul 8, 6:48 PM EDT | Mesoscale Discussion | SPC | Alexander, Avery, Caldwell, Davie, Iredell, Watauga and 2 more | 57 min |
| Jul 8, 7:36 PM EDT | Mesoscale Discussion | SPC | Clay | 24 min |
| Jul 8, 1:01 PM EDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Campbell, Claiborne, Cocke and 31 more | 59 min |
| Jul 8, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 50 more | 7 hr |
| Jul 8, 2:59 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Dyer, Gibson and 10 more | 2 hr |
| Jul 8, 3:26 PM EDT | Severe Thunderstorm Watch | SPC | Chester, Crockett, Dyer, Fayette, Gibson, Hardeman and 9 more | 5 hr |
| Jul 8, 3:49 PM EDT | Mesoscale Discussion | SPC | Anderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 41 more | 56 min |
| Jul 8, 5:42 PM EDT | Mesoscale Discussion | SPC | Carroll, Chester, Crockett, Dyer, Gibson, Haywood and 6 more | 63 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2016Severe Thunderstorm Watches in North Carolina, 2016Severe Thunderstorm Watches in West Virginia, 2016Every severe thunderstorm watch 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.