Alert archive / Virginia / Winter Storm Warnings in 2010
Winter Storm Warning 11, NWS Blacksburg, VA
NWS Blacksburg, VA issued this winter storm warning at Feb 25, 2010, 12:50 PM EST for Grayson County, Smyth County, Tazewell County, Virginia; Ashe County, Watauga County, North Carolina; Mercer County, Summers County, West Virginia. It took effect at Feb 26, 2010, 7:00 PM EST. It was in force for 44 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 25, 2010, 12:50 PM EST (17:50 UTC)
- In effect from
- Feb 26, 2010, 7:00 PM EST
- Expired
- Feb 28, 2010, 3:02 PM EST
- In force
- 44 hr
- Issued by
- NWS Blacksburg, VA
Counties Ashe County, NC, Watauga County, NC, Grayson County, VA, Smyth County, VA, Tazewell County, VA, Mercer County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 97 km from the middle of the area, began a volume at 17:53 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, 5.8 hours before the alert went out and 159 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
- 948 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 128 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 storm 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 winter storm warning went out at Feb 25, 10:29 AM EST, 2 hours 21 minutes earlier.
Area forecast discussion, Feb 25, 10:29 AM EST, 2 hours 21 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 25, 12:50 PM EST | Blizzard Warning | RNK | Grayson, Smyth, Tazewell | 30 hr |
Nearby
Winter Storm Warnings in Virginia, 2010Winter Storm Warnings in North Carolina, 2010Winter Storm Warnings in West Virginia, 2010Every winter storm warning in 2010
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.