Alert archive / North Carolina / Snow Advisories in 2008

Snow Advisory 1, NWS Blacksburg, VA

January 18, 20084 counties in Virginia; 6 counties in North Carolina

NWS Blacksburg, VA issued this snow advisory at Jan 18, 2008, 3:00 PM EST for 4 counties in Virginia; 6 counties in North Carolina. It took effect at Jan 19, 2008, 6:00 AM EST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Jan 18, 2008, 3:00 PM EST (20:00 UTC)
In effect from: Jan 19, 2008, 6:00 AM EST
Expired: Jan 19, 2008, 7:40 PM EST
In force: 14 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, Halifax County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 69 km from the middle of the area, began a volume at 19:59 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, 8.0 hours before the alert went out and 49 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: 656 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: -150 m²/s²
0-3 km storm-relative helicity: -58 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 18, 2:58 PM EST, 2 minutes earlier.

Area forecast discussion, Jan 18, 2:58 PM EST, 2 minutes before

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Hazardous weather outlook, Jan 18, 3:52 AM EST, 11 hours 8 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 18, 6:45 AM EST	Dense Fog Advisory	RNK	Carroll, Patrick, City of Galax	3 hr

Nearby

Snow Advisories in North Carolina, 2008 Snow Advisories in Virginia, 2008 Every snow 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.