Alert archive / Virginia / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 419
The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2016, 2:08 PM EDT for 35 counties in Virginia; 15 counties in West Virginia. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2016, 2:08 PM EDT (18:08 UTC)
- Expired
- Jul 29, 2016, 12:00 AM EDT
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 50 counties
Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Lexington, 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, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Braxton County, WV, Clay County, WV, Fayette County, WV, Greenbrier County, WV, McDowell County, WV, Mercer County, WV, Monroe County, WV, Nicholas County, WV, Pocahontas County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV
The radar
The Roanoke radar (KFCX), 93 km from the middle of the area, began a volume at 18:10 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
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 28, 3:14 PM EDT | Severe Thunderstorm Warning | RLX | Boone, Fayette, Kanawha, Raleigh | 31 min |
| Jul 28, 3:33 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Floyd, Patrick | 39 min |
| Jul 28, 3:46 PM EDT | Severe Thunderstorm Warning | RLX | Braxton, Clay, Nicholas, Webster | 29 min |
| Jul 28, 5:12 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Botetourt, Craig, Rockbridge | 52 min |
| Jul 28, 5:37 PM EDT | Severe Thunderstorm Warning | RNK | Franklin | 53 min |
| Jul 28, 5:44 PM EDT | Severe Thunderstorm Warning | RNK | Rockbridge, City of Lexington | 43 min |
| Jul 28, 5:52 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Bedford, City of Lynchburg | 53 min |
| Jul 28, 6:17 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Appomattox, Buckingham, Campbell, City of Lynchburg | 58 min |
| Jul 28, 7:10 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Buckingham | 37 min |
| Jul 28, 9:19 PM EDT | Severe Thunderstorm Warning | RNK | Botetourt, Craig, Montgomery, Roanoke, City of Roanoke, City of Salem | 41 min |
| Jul 28, 10:26 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington and 1 more | 64 min |
| Jul 28, 10:55 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Bedford, Campbell, Pittsylvania, City of Lynchburg | 65 min |
| Jul 28, 11:49 PM EDT | Severe Thunderstorm Warning | RNK | Buckingham | 37 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, 6.1 hours before the alert went out and 123 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
- 32 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 1180 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 2:33 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hyde and 4 more | 2 hr |
| Jul 28, 12:58 PM EDT | Mesoscale Discussion | SPC | Albemarle, Arlington, Caroline, Clarke, Culpeper, Essex and 35 more | 2 hr |
| Jul 28, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | Albemarle, Arlington, Augusta, Clarke, Culpeper, Fairfax and 28 more | 11 hr |
| Jul 28, 1:28 PM EDT | Mesoscale Discussion | SPC | Alleghany, Bedford, Bland, Botetourt, Craig, Floyd and 12 more | 3 hr |
| Jul 28, 2:57 PM EDT | Mesoscale Discussion | SPC | Accomack, Amelia, Brunswick, Charles City, Chesterfield, Dinwiddie and 36 more | 3 hr |
| Jul 28, 4:10 PM EDT | Mesoscale Discussion | SPC | Albemarle, Alleghany, Amherst, Arlington, Augusta, Bath and 50 more | 95 min |
| Jul 28, 6:52 PM EDT | Mesoscale Discussion | SPC | Albemarle, Alleghany, Amherst, Appomattox, Arlington, Augusta and 63 more | 83 min |
Nearby
Severe Thunderstorm Watches in Virginia, 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.