Alert archive / Virginia / High Wind Watches in 2015

High Wind Watch 1, NWS Blacksburg, VA

February 13, 201524 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina

NWS Blacksburg, VA issued this high wind watch at Feb 13, 2015, 4:56 AM EST for 24 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina. It took effect at Feb 14, 2015, 4:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 13, 2015, 4:56 AM EST (09:56 UTC)
In effect from: Feb 14, 2015, 4:00 PM EST
Expired: Feb 13, 2015, 9:13 PM EST
In force
Issued by: NWS Blacksburg, VA

All 27 counties

Alleghany County, NC, Ashe County, NC, Watauga County, NC, Alleghany County, VA, Amherst County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Lexington, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Grayson County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 17 km from the middle of the area, began a volume at 09:54 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 00:00Z, 9.9 hours before the alert went out and 323 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1749 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind watch 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 high wind watch went out at Feb 13, 4:46 AM EST, 10 minutes earlier.

Area forecast discussion, Feb 13, 4:46 AM EST, 10 minutes before

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Hazardous weather outlook, Feb 12, 10:50 PM EST, 6 hours 6 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 13, 4:52 AM EST	Wind Chill Watch	RNK	Alleghany, Amherst, Bath, Bland, Botetourt, Carroll and 18 more	24 hr
Feb 13, 10:08 AM EST	Wind Chill Advisory	RNK	Alleghany, Bath, Botetourt, Craig, Floyd, Roanoke and 6 more	112 min
Feb 13, 2:42 PM EST	Winter Weather Advisory	RNK	Bath, Grayson, Smyth, Tazewell	38 hr

Nearby

High Wind Watches in Virginia, 2015 High Wind Watches in North Carolina, 2015 Every high wind watch in 2015

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.