Alert archive / Virginia / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 95
The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2020, 2:03 AM EDT for 43 counties in Virginia; 11 counties in West Virginia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2020, 2:03 AM EDT (06:03 UTC)
- Expired
- Apr 9, 2020, 5:04 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 54 counties
Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, Craig County, VA, Culpeper County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Highland County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Grant County, WV, Greenbrier County, WV, Hardy County, WV, Lewis County, WV, Mercer County, WV, Monroe County, WV, Pendleton County, WV, Pocahontas County, WV, Randolph County, WV, Summers County, WV, Upshur County, WV
The radar
The Roanoke radar (KFCX), 101 km from the middle of the area, began a volume at 06:05 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
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:04 AM EDT | Severe Thunderstorm Warning | RLX | Barbour, Braxton, Clay, Lewis, Nicholas, Pocahontas and 3 more | 56 min |
| Apr 9, 2:42 AM EDT | Severe Thunderstorm Warning | LWX | Highland | 63 min |
| Apr 9, 2:47 AM EDT | Severe Thunderstorm Warning | RNK | Giles | 43 min |
| Apr 9, 2:52 AM EDT | Severe Thunderstorm Warning | LWX | Grant, Hardy | 38 min |
| Apr 9, 3:08 AM EDT | Severe Thunderstorm Warning | RNK | Bath, Rockbridge | 52 min |
| Apr 9, 3:14 AM EDT | Severe Thunderstorm Warning | LWX | Augusta, City of Staunton, City of Waynesboro | 61 min |
| Apr 9, 3:34 AM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Botetourt, Craig | 41 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 00:00Z, 6.1 hours before the alert went out and 87 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
- 1382 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 268 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 |
|---|---|---|---|---|
| Apr 8, 10:14 PM EDT | Mesoscale Discussion | SPC | Buchanan, Dickenson, Wise, City of Norton | 3 hr |
| Apr 8, 10:51 PM EDT | Tornado Watch | SPC | Buchanan, Dickenson | 5 hr |
| Apr 8, 11:16 PM EDT | Severe Thunderstorm Watch | SPC | Lee, Russell, Scott, Washington, Wise, City of Bristol and 1 more | 6 hr |
| Apr 9, 12:50 AM EDT | Mesoscale Discussion | SPC | Alleghany, Bath, Bland, Craig, Giles, Highland and 7 more | 115 min |
| Apr 9, 3:36 AM EDT | Mesoscale Discussion | SPC | Albemarle, Alleghany, Amherst, Augusta, Bath, Bedford and 40 more | 84 min |
| Apr 9, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church | 4 hr |
Nearby
Severe Thunderstorm Watches in Virginia, 2020Severe Thunderstorm Watches in West Virginia, 2020Every severe thunderstorm watch in 2020
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.