Alert archive / Virginia / Winter Weather Advisories in 2021
Winter Weather Advisory 12, NWS Blacksburg, VA
NWS Blacksburg, VA issued this winter weather advisory at Feb 6, 2021, 4:16 AM EST for 6 counties in Virginia; 6 counties in North Carolina. It took effect at Feb 6, 2021, 7:00 PM EST. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Feb 6, 2021, 4:16 AM EST (09:16 UTC)
- In effect from
- Feb 6, 2021, 7:00 PM EST
- Expired
- Feb 7, 2021, 12:00 PM EST
- In force
- 17 hr
- Issued by
- NWS Blacksburg, VA
Counties Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Charlotte County, VA, City of Danville, VA, City of Martinsville, VA, Halifax County, VA, Henry County, VA, Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 66 km from the middle of the area, began a volume at 09:13 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 00:00Z, 9.3 hours before the alert went out and 52 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
- 2369 m above ground
- 0-6 km bulk shear
- 98 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory 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 winter weather advisory went out at Feb 5, 6:26 PM EST, 9 hours 50 minutes earlier.
Area forecast discussion, Feb 5, 6:26 PM EST, 9 hours 50 minutes before
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</html>Hazardous weather outlook, Feb 5, 4:43 PM EST, 11 hours 33 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 |
|---|---|---|---|---|
| Feb 6, 4:16 AM EST | Winter Storm Warning | RNK | Alleghany, Amherst, Appomattox, Bath, Bedford, Bland and 25 more | 32 hr |
Nearby
Winter Weather Advisories in Virginia, 2021Winter Weather Advisories in North Carolina, 2021Every winter weather advisory in 2021
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.