Alert archive / Virginia / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 18
The Storm Prediction Center issued this severe thunderstorm watch at Jan 11, 2020, 7:37 PM EST for 9 counties in North Carolina; 31 counties in Virginia; Mercer County, West Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 11, 2020, 7:37 PM EST (00:37 UTC)
- Expired
- Jan 12, 2020, 1:00 AM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 65 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, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buckingham 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
The radar
The Roanoke radar (KFCX), 7 km from the middle of the area, began a volume at 00:40 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
- 20%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 8:04 PM EST | Severe Thunderstorm Warning | RNK | Bland, Giles, Tazewell, Wythe | 43 min |
| Jan 11, 8:44 PM EST | Severe Thunderstorm Warning | RNK | Alleghany, Botetourt, Craig, Giles, Montgomery, Pulaski and 3 more | 61 min |
| Jan 11, 8:55 PM EST | Flash Flood Warning | RNK | Alleghany, Ashe, Watauga, Wilkes | 6 hr |
| Jan 11, 9:07 PM EST | Severe Thunderstorm Warning | RNK | Alleghany, Surry, Wilkes, Yadkin | 53 min |
| Jan 11, 9:26 PM EST | Severe Thunderstorm Warning | RNK | Alleghany, Bath, Bedford, Botetourt, Craig, Montgomery and 5 more | 64 min |
| Jan 11, 9:43 PM EST | Severe Thunderstorm Warning | RNK | Rockingham, Stokes, Surry | 62 min |
| Jan 11, 10:33 PM EST | Severe Thunderstorm Warning | RNK | Caswell, Rockingham | 57 min |
| Jan 11, 10:40 PM EST | Severe Thunderstorm Warning | RNK | Rockingham, Stokes | 35 min |
| Jan 11, 11:21 PM EST | Severe Thunderstorm Warning | RNK | Caswell, Rockingham | 54 min |
| Jan 11, 11:27 PM EST | Severe Thunderstorm Warning | RNK | Amherst, Appomattox, Buckingham, Campbell, Charlotte, Halifax and 2 more | 63 min |
| Jan 12, 12:12 AM EST | Severe Thunderstorm Warning | RNK | Halifax | 34 min |
| Jan 12, 12:28 AM EST | Severe Thunderstorm Warning | RNK | Appomattox, Buckingham, Charlotte, Halifax | 32 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 8:40 PM EST | Mesoscale Discussion | SPC | Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 14 more | 95 min |
| Jan 11, 9:35 PM EST | Severe Thunderstorm Watch | SPC | Alamance, Anson, Bladen, Chatham, Cumberland, Davidson and 19 more | 4 hr |
| Jan 11, 10:59 PM EST | Mesoscale Discussion | SPC | Alamance, Anson, Caswell, Chatham, Cumberland, Davidson and 22 more | 91 min |
| Jan 11, 11:25 PM EST | Severe Thunderstorm Watch | SPC | Bertie, Camden, Chowan, Edgecombe, Gates, Greene and 13 more | 4 hr |
| Jan 12, 1:49 AM EST | Mesoscale Discussion | SPC | Beaufort, Bladen, Brunswick, Columbus, Craven, Duplin and 10 more | 86 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2020Severe Thunderstorm Watches in North Carolina, 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; radar from the NEXRAD Level II archive.