Alert archive / Virginia / Frost Advisories in 2006

Frost Advisory 3, NWS Blacksburg, VA

October 12, 200615 counties in Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this frost advisory at Oct 12, 2006, 10:20 PM EDT for 15 counties in Virginia; Mercer County, West Virginia. It took effect at Oct 13, 2006, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Oct 12, 2006, 10:20 PM EDT (02:20 UTC)
In effect from: Oct 13, 2006, 2:00 AM EDT
Expired: Oct 13, 2006, 8:00 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA

Counties Bland County, VA, Carroll County, VA, City of Buena Vista, VA, City of Galax, VA, City of Lexington, VA, City of Radford, VA, Craig County, VA, Floyd County, VA, Giles County, VA, Montgomery County, VA, Pulaski County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 34 km from the middle of the area, began a volume at 02:22 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 00:00Z, 2.3 hours before the alert went out and 139 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: 1784 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 344 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 frost 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 frost advisory went out at Oct 12, 10:10 PM EDT, 10 minutes earlier.

Area forecast discussion, Oct 12, 10:10 PM EDT, 10 minutes before

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Hazardous weather outlook, Oct 12, 3:00 PM EDT, 7 hours 20 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
Oct 13, 4:41 AM EDT	Frost Advisory	RNK	Charlotte, Franklin, Halifax, Henry, Patrick, Pittsylvania and 5 more	27 hr
Oct 13, 3:48 PM EDT	Freeze Warning	RNK	Amherst, Appomattox, Bedford, Botetourt, Buckingham, Campbell and 1 more	16 hr

Nearby

Frost Advisories in Virginia, 2006 Frost Advisories in West Virginia, 2006 Every frost advisory in 2006

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.