Alert archive / West Virginia / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 171, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 27, 2020, 4:34 PM EDT for Greenbrier County, West Virginia. It was in force for 56 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
- Aug 27, 2020, 4:34 PM EDT (20:34 UTC)
- Expired
- Aug 27, 2020, 5:30 PM EDT
- In force
- 56 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Greenbrier County, WV
The radar
The Roanoke radar (KFCX), 104 km from the middle of the area, began a volume at 20:36 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
Roanoke, VA (KRNK), launched 12:00Z, 8.6 hours before the alert went out and 118 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
- 162 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 951 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 5 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 Aug 26, 7:50 PM EDT, 20 hours 44 minutes earlier.
Area forecast discussion, Aug 26, 7:50 PM EDT, 20 hours 44 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 |
|---|---|---|---|---|
| Aug 27, 4:23 PM EDT | Special Weather Statement | RNK | Appomattox | 37 min |
| Aug 27, 5:23 PM EDT | Special Weather Statement | RNK | Patrick | 37 min |
| Aug 27, 5:29 PM EDT | Special Weather Statement | RNK | Alleghany | 31 min |
| Aug 27, 6:17 PM EDT | Special Weather Statement | RNK | City of Buena Vista | 43 min |
| Aug 27, 7:00 PM EDT | Special Weather Statement | RNK | City of Lynchburg | 30 min |
| Aug 27, 5:52 PM EDT | Special Weather Statement | RNK | Stokes | 23 min |
| Aug 27, 6:27 PM EDT | Special Weather Statement | RNK | Rockingham | 33 min |
| Aug 27, 5:47 PM EDT | Areal Flood Advisory | RNK | Greenbrier | 3 hr |
| Aug 27, 6:33 PM EDT | Special Weather Statement | RNK | Greenbrier | 42 min |
Nearby
Severe Thunderstorm Warnings in West 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.