Alert archive / Virginia / Frost Advisories in 2008
Frost Advisory 3, NWS Blacksburg, VA
NWS Blacksburg, VA issued this frost advisory at Apr 29, 2008, 4:12 AM EDT for 31 counties in Virginia; 5 counties in North Carolina; Mercer County, Monroe County, Summers County, West Virginia. It took effect at Apr 29, 2008, 2:54 PM EDT. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 2008, 4:12 AM EDT (08:12 UTC)
- In effect from
- Apr 29, 2008, 2:54 PM EDT
- Expired
- Apr 30, 2008, 9:00 AM EDT
- In force
- 18 hr
- Issued by
- NWS Blacksburg, VA
All 39 counties
Alleghany County, NC, Ashe County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Alleghany County, VA, Amherst County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Campbell County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 16 km from the middle of the area, began a volume at 08:16 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 00:00Z, 8.2 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -221 m²/s²
- 0-3 km storm-relative helicity
- -87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 29, 3:28 AM EDT, 44 minutes earlier.
Area forecast discussion, Apr 29, 3:28 AM EDT, 44 minutes before
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Special weather statement, Apr 28, 11:37 PM EDT, 4 hours 35 minutes before
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Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 10:07 PM EDT | Wind Advisory | RNK | Carroll, Grayson, City of Galax | 12 hr |
| Apr 29, 4:12 AM EDT | Freeze Warning | RNK | Alleghany, Bath, Bland, Craig, Floyd, Giles and 8 more | 29 hr |
Nearby
Frost Advisories in Virginia, 2008Frost Advisories in North Carolina, 2008Frost Advisories in West Virginia, 2008Every frost 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.