Alert archive / Virginia / Wind Advisories in 2008

Wind Advisory 14, NWS Baltimore/Washington

December 21, 20087 counties in Virginia; Allegany County, Maryland; Grant County, Mineral County, West Virginia

NWS Baltimore/Washington issued this wind advisory at Dec 21, 2008, 10:00 AM EST for 7 counties in Virginia; Allegany County, Maryland; Grant County, Mineral County, West Virginia. It took effect at Dec 21, 2008, 1:00 PM EST. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued: Dec 21, 2008, 10:00 AM EST (15:00 UTC)
In effect from: Dec 21, 2008, 1:00 PM EST
Expired: Dec 22, 2008, 12:30 PM EST
In force: 24 hr
Issued by: NWS Baltimore/Washington

Counties Allegany County, MD, Culpeper County, VA, King George County, VA, Madison County, VA, Page County, VA, Rappahannock County, VA, Stafford County, VA, Warren County, VA, Grant County, WV, Mineral County, WV

The radar

The Sterling radar (KLWX), 69 km from the middle of the area, began a volume at 15:03 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, 3.0 hours before the alert went out and 208 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: 470 m above ground
0-6 km bulk shear: 111 kt
0-1 km storm-relative helicity: -181 m²/s²
0-3 km storm-relative helicity: 181 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this wind advisory went out at Dec 21, 7:11 AM EST, 2 hours 49 minutes earlier.

Area forecast discussion, Dec 21, 7:11 AM EST, 2 hours 49 minutes before

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Hazardous weather outlook, Dec 21, 5:01 AM EST, 4 hours 59 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 21, 3:17 PM EST	Wind Chill Advisory	LWX	Clarke, Frederick, Shenandoah, Warren, City of Winchester	21 hr
Dec 21, 3:21 PM EST	Wind Advisory	LWX	Arlington, Clarke, Fairfax, Frederick, Rockingham, Shenandoah and 7 more	21 hr
Dec 21, 3:17 PM EST	Winter Weather Advisory	LWX	Grant	21 hr

Nearby

Wind Advisories in Virginia, 2008 Wind Advisories in West Virginia, 2008 Wind Advisories in Maryland, 2008 Every wind 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.