Alert archive / Virginia / Wind Chill Advisories in 2008

Wind Chill Advisory 1, NWS Blacksburg, VA

January 2, 200821 counties in Virginia; Alleghany County, North Carolina; Monroe County, West Virginia

NWS Blacksburg, VA issued this wind chill advisory at Jan 2, 2008, 4:15 PM EST for 21 counties in Virginia; Alleghany County, North Carolina; Monroe County, West Virginia. It took effect at Jan 2, 2008, 10:00 PM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jan 2, 2008, 4:15 PM EST (21:15 UTC)
In effect from: Jan 2, 2008, 10:00 PM EST
Expired: Jan 3, 2008, 10:00 AM EST
In force: 12 hr
Issued by: NWS Blacksburg, VA

All 23 counties

Alleghany County, NC, Alleghany County, VA, Bath County, VA, Bland 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, Giles County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Wythe County, VA, Monroe County, WV

The radar

The Roanoke radar (KFCX), 30 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 141 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: 1655 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: 57 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 wind chill 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 wind chill advisory went out at Jan 2, 2:53 PM EST, 1 hour 22 minutes earlier.

Area forecast discussion, Jan 2, 2:53 PM EST, 1 hour 22 minutes before

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Hazardous weather outlook, Jan 2, 4:13 PM EST, 2 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 2, 8:34 AM EST	Red Flag Warning	RNK	Caswell, Rockingham, Stokes, Yadkin	9 hr

Nearby

Wind Chill Advisories in Virginia, 2008 Wind Chill Advisories in North Carolina, 2008 Wind Chill Advisories in West Virginia, 2008 Every wind chill advisory in 2008

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.