Alert archive / Virginia / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 130, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 28, 2020, 2:48 PM EDT for 4 counties in Virginia; Caswell County, Rockingham County, North Carolina. It was in force for 57 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 28, 2020, 2:48 PM EDT (18:48 UTC)
- Expired
- Jul 28, 2020, 3:45 PM EDT
- In force
- 57 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caswell County, NC, Rockingham County, NC, City of Danville, VA, Halifax County, VA, Henry County, VA, Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 85 km from the middle of the area, began a volume at 18:49 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.8 hours before the alert went out and 70 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
- 702 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1352 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 23 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 28, 2:33 PM EDT, 15 minutes earlier.
Area forecast discussion, Jul 28, 2:33 PM EDT, 15 minutes before
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</html>Hazardous weather outlook, Jul 28, 9:58 AM EDT, 4 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Blacksburg VA 958 AM EDT Tue Jul 28 2020 VAZ034-035-045>047-059-291400- Bedford-Amherst-Campbell-Appomattox-Buckingham-Charlotte- 958 AM EDT Tue Jul 28 2020 This Hazardous Weather Outlook is for central Virginia and south central Virginia. .DAY ONE...Today and tonight. There is a Marginal Risk for stronger to severe thunderstorms capable of producing damaging wind gusts this afternoon and evening. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ001>006-018>020-VAZ007-009>020-022>024-032-033-043-044-058- WVZ042>044-507-508-291400- Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes- Yadkin-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Grayson- Carroll-Floyd-Craig-Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge- Patrick-Franklin-Henry-Pittsylvania-Halifax-Mercer-Summers-Monroe- Eastern Greenbrier-Western Greenbrier- 958 AM EDT Tue Jul 28 2020 This Hazardous Weather Outlook is for north central North Carolina, northwest North Carolina, south central Virginia, southwest Virginia, west central Virginia and southeast West Virginia. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Jul 28, 1:33 PM EDT, 1 hour 15 minutes before
Special Weather Statement National Weather Service BLACKSBURG VA 133 PM EDT Tue Jul 28 2020 NCZ003-004-VAZ032-281800- Stokes-Surry-Patrick- 133 PM EDT Tue Jul 28 2020 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN SURRY...NORTHWESTERN STOKES AND SOUTH CENTRAL PATRICK COUNTIES... At 131 PM EDT, radar indicated strong thunderstorms were located along a line extending from near Collinstown to near Dobson. Movement was east at 20 mph. Winds in excess of 30 mph and half inch hail are possible with a couple of these storms. As these storms crossed the Mount Airy region, they produced an abundant amount of one-quarter to one-half inch hail. Locations impacted include... Dobson... Pilot Mountain... Francisco... Level Cross... Woodville... White Plains... and Ararat. Torrential rainfall is also occurring with these storms, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. These storms may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 3654 8011 3630 8057 3639 8076 3660 8036 TIME...MOT...LOC 1731Z 282DEG 15KT 3656 8037 3641 8069 DS
Special weather statement, Jul 28, 1:35 PM EDT, 1 hour 13 minutes before
Special Weather Statement National Weather Service BLACKSBURG VA 135 PM EDT Tue Jul 28 2020 VAZ033-281800- Franklin- 135 PM EDT Tue Jul 28 2020 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL FRANKLIN COUNTY... At 135 PM EDT, radar indicated strong thunderstorms were scattered along a line extending from near Rocky Mount to near Ferrum. Movement was east at 10 mph. Winds in excess of 30 mph and half inch hail are possible with these storms. Locations impacted include... Rocky Mount... Sydnorsville... Ferrum... Western Smith Mountain Lake... Union Hall... Sontag... and North Shore. Torrential rainfall is also occurring with these storms, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. These storms may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 3706 7963 3681 7985 3689 8004 3709 7988 TIME...MOT...LOC 1735Z 279DEG 10KT 3704 7983 3689 7998 DS
Special weather statement, Jul 28, 1:44 PM EDT, 1 hour 4 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 28, 12:05 PM EDT | Special Weather Statement | RNK | Floyd, City of Radford | 40 min |
| Jul 28, 12:11 PM EDT | Special Weather Statement | RNK | City of Galax | 49 min |
| Jul 28, 1:35 PM EDT | Special Weather Statement | RNK | Franklin | 25 min |
| Jul 28, 2:00 PM EDT | Special Weather Statement | RNK | Henry, City of Martinsville | 30 min |
| Jul 28, 2:28 PM EDT | Areal Flood Advisory | RNK | Henry, City of Martinsville | 2 hr |
| Jul 28, 2:34 PM EDT | Special Weather Statement | RNK | Henry, Pittsylvania, City of Martinsville | 26 min |
| Jul 28, 3:05 PM EDT | Special Weather Statement | RNK | Campbell, City of Lynchburg | 25 min |
| Jul 28, 3:21 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax, Pittsylvania | 54 min |
| Jul 28, 3:28 PM EDT | Special Weather Statement | RNK | Appomattox, Campbell | 32 min |
| Jul 28, 3:34 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Campbell, Charlotte | 56 min |
| Jul 28, 4:04 PM EDT | Special Weather Statement | RNK | Botetourt | 26 min |
| Jul 28, 4:20 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington | 55 min |
| Jul 28, 4:22 PM EDT | Special Weather Statement | RNK | Alleghany | 23 min |
| Jul 28, 12:41 PM EDT | Special Weather Statement | RNK | Surry | 19 min |
| Jul 28, 1:01 PM EDT | Special Weather Statement | RNK | Surry | 29 min |
| Jul 28, 1:33 PM EDT | Special Weather Statement | RNK | Surry | 27 min |
| Jul 28, 1:44 PM EDT | Special Weather Statement | RNK | Alleghany | 31 min |
| Jul 28, 2:17 PM EDT | Special Weather Statement | RNK | Wilkes | 28 min |
| Jul 28, 3:00 PM EDT | Special Weather Statement | RNK | Surry, Wilkes, Yadkin | 60 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2020Severe Thunderstorm Warnings in North Carolina, 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.