Alert archive / Virginia / High Wind Watches in 2009
High Wind Watch 4, NWS Blacksburg, VA
NWS Blacksburg, VA issued this high wind watch at Dec 23, 2009, 3:37 PM EST for Bland County, Smyth County, Tazewell County, Virginia; Mercer County, West Virginia. It took effect at Dec 24, 2009, 6:00 PM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 23, 2009, 3:37 PM EST (20:37 UTC)
- In effect from
- Dec 24, 2009, 6:00 PM EST
- Expired
- Dec 24, 2009, 4:17 AM EST
- In force
- Issued by
- NWS Blacksburg, VA
Counties Bland County, VA, Smyth County, VA, Tazewell County, VA, Mercer County, WV
The radar
The Roanoke radar (KFCX), 95 km from the middle of the area, began a volume at 20:38 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, 8.6 hours before the alert went out and 163 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
- 1148 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this high wind watch 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 high wind watch went out at Dec 23, 3:32 PM EST, 5 minutes earlier.
Area forecast discussion, Dec 23, 3:32 PM EST, 5 minutes before
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Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 3:49 PM EST | Winter Storm Watch | RNK | Alleghany, Amherst, Bath, Bedford, Botetourt, Carroll and 18 more | 24 hr |
Nearby
High Wind Watches in Virginia, 2009High Wind Watches in West Virginia, 2009Every high wind watch in 2009
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.