Alert archive / Virginia / Snow Advisories in 2007

Snow Advisory 1, NWS Blacksburg, VA

January 8, 20074 counties in Virginia; Ashe County, Watauga County, North Carolina; Mercer County, Summers County, West Virginia

NWS Blacksburg, VA issued this snow advisory at Jan 8, 2007, 2:34 PM EST for 4 counties in Virginia; Ashe County, Watauga County, North Carolina; Mercer County, Summers County, West Virginia. It took effect at Jan 9, 2007, 6:00 AM EST. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Jan 8, 2007, 2:34 PM EST (19:34 UTC)
In effect from: Jan 9, 2007, 6:00 AM EST
Expired: Jan 10, 2007, 9:00 AM EST
In force: 27 hr
Issued by: NWS Blacksburg, VA

Counties Ashe County, NC, Watauga County, NC, Bland County, VA, Grayson County, VA, Smyth County, VA, Tazewell County, VA, Mercer County, WV, Summers County, WV

The radar

The Roanoke radar (KFCX), 94 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 165 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: 579 m above ground
0-6 km bulk shear: 98 kt
0-1 km storm-relative helicity: -167 m²/s²
0-3 km storm-relative helicity: -42 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 snow 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 snow advisory went out at Jan 8, 12:16 PM EST, 2 hours 18 minutes earlier.

Area forecast discussion, Jan 8, 12:16 PM EST, 2 hours 18 minutes before

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Hazardous weather outlook, Jan 8, 10:45 AM EST, 3 hours 49 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
Jan 8, 8:37 AM EST	Wind Advisory	RNK	Alleghany, Bath, Bland, Botetourt, Carroll, Craig and 17 more	7 hr

Nearby

Snow Advisories in Virginia, 2007 Snow Advisories in North Carolina, 2007 Snow Advisories in West Virginia, 2007 Every snow advisory in 2007

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.