Alert archive / Virginia / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 105, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 21, 2020, 1:29 PM EDT for Carroll County, Virginia. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2020, 1:29 PM EDT (17:29 UTC)
- Expired
- Jul 21, 2020, 2:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Carroll County, VA
The radar
The Roanoke radar (KFCX), 52 km from the middle of the area, began a volume at 17:32 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.5 hours before the alert went out and 383 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
- 1997 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 1:17 PM EDT, 12 minutes earlier.
Area forecast discussion, Jul 21, 1:17 PM EDT, 12 minutes before
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Hazardous Weather Outlook National Weather Service Blacksburg VA 405 AM EDT Tue Jul 21 2020 NCZ005-006-VAZ044>047-058-059-220900- Rockingham-Caswell-Pittsylvania-Campbell-Appomattox-Buckingham- Halifax-Charlotte- 405 AM EDT Tue Jul 21 2020 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for north central North Carolina, central Virginia and south central Virginia. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. There is also a Marginal Risk for strong to severe thunderstorms this afternoon and evening. The primary threat will be damaging wind gusts. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Heat index values may reach 102 to 108 again on Wednesday. Thunderstorms could be strong to severe Wednesday afternoon and evening, with damaging winds the main threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ003-004-019-020-VAZ022>024-032>035-043-220900- Surry-Stokes-Wilkes-Yadkin-Roanoke-Botetourt-Rockbridge-Patrick- Franklin-Bedford-Amherst-Henry- 405 AM EDT Tue Jul 21 2020 This Hazardous Weather Outlook is for north central North Carolina, northwest North Carolina, central Virginia, south central Virginia, southwest Virginia and west central Virginia. .DAY ONE...Today and tonight. There is a Marginal Risk for strong to severe thunderstorms this afternoon and evening. The primary threat will be damaging wind gusts. Also, heat index values may reach 100-104 this afternoon. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Thunderstorms could be strong to severe Wednesday afternoon and evening, with damaging winds the main threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ001-002-018-VAZ007-009>020-WVZ042>044-507-508-220900- Ashe-Alleghany NC-Watauga-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski- Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-Bath-Mercer- Summers-Monroe-Eastern Greenbrier-Western Greenbrier- 405 AM EDT Tue Jul 21 2020 This Hazardous Weather Outlook is for northwest North Carolina, southwest Virginia, west central Virginia and southeast West Virginia. .DAY ONE...Today and tonight. There is a Marginal Risk for strong to severe thunderstorms this afternoon and evening. The primary threat will be damaging wind gusts. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Thunderstorms could be strong to severe Wednesday afternoon and evening, with damaging winds the main threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Jul 21, 12:19 PM EDT, 1 hour 10 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
1219 PM EDT Tue Jul 21 2020
VAZ015-211645-
Grayson-
1219 PM EDT Tue Jul 21 2020
...A STRONG THUNDERSTORM WILL AFFECT
NORTHEASTERN GRAYSON COUNTY...
At 1219 PM EDT, a strong thunderstorm was located over Spring Valley,
or near Fries, moving east at 5 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Fries...
and Spring Valley.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 3676 8101 3675 8099 3665 8095 3663 8112
3671 8115
TIME...MOT...LOC 1619Z 264DEG 5KT 3669 8107
RRSpecial weather statement, Jul 21, 12:50 PM EDT, 39 minutes before
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</html>The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:38 PM EDT | Heat Advisory | RNK | Appomattox, Buckingham, Campbell, Charlotte, Halifax, Pittsylvania and 2 more | 22 hr |
| Jul 20, 10:08 PM EDT | Special Weather Statement | RNK | Smyth | 37 min |
| Jul 21, 12:19 PM EDT | Special Weather Statement | RNK | City of Galax | 26 min |
| Jul 21, 12:50 PM EDT | Special Weather Statement | RNK | Pulaski | 25 min |
| Jul 21, 1:16 PM EDT | Special Weather Statement | RNK | Pulaski, City of Radford | 29 min |
| Jul 21, 1:39 PM EDT | Special Weather Statement | RNK | City of Salem | 36 min |
| Jul 21, 1:41 PM EDT | Special Weather Statement | RNK | City of Galax | 34 min |
| Jul 21, 1:45 PM EDT | Special Weather Statement | RNK | Montgomery | 30 min |
| Jul 21, 2:15 PM EDT | Special Weather Statement | RNK | Floyd | 30 min |
| Jul 21, 2:43 PM EDT | Special Weather Statement | RNK | Floyd | 32 min |
| Jul 21, 2:49 PM EDT | Severe Thunderstorm Warning | RNK | Floyd | 41 min |
| Jul 21, 2:57 PM EDT | Special Weather Statement | RNK | Craig | 33 min |
| Jul 21, 3:05 PM EDT | Severe Thunderstorm Warning | RNK | Botetourt, Craig | 40 min |
| Jul 21, 3:13 PM EDT | Special Weather Statement | RNK | City of Roanoke | 32 min |
| Jul 21, 3:22 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Botetourt, Franklin, Roanoke, City of Roanoke | 38 min |
| Jul 21, 3:44 PM EDT | Special Weather Statement | RNK | Rockbridge, City of Lexington | 31 min |
| Jul 21, 4:03 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Campbell, City of Lynchburg | 57 min |
| Jul 21, 4:35 PM EDT | Special Weather Statement | RNK | Bath | 25 min |
| Jul 21, 6:34 PM EDT | Special Weather Statement | RNK | Bland | 41 min |
| Jul 21, 7:22 PM EDT | Special Weather Statement | RNK | Halifax | 23 min |
| Jul 21, 3:36 PM EDT | Special Weather Statement | RNK | Alleghany, Ashe, Watauga | 24 min |
| Jul 21, 4:17 PM EDT | Special Weather Statement | RNK | Watauga | 28 min |
| Jul 21, 4:47 PM EDT | Special Weather Statement | RNK | Wilkes | 28 min |
| Jul 21, 5:16 PM EDT | Special Weather Statement | RNK | Wilkes | 29 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2020Every severe thunderstorm warning 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.