Alert archive / Virginia / Wind Advisories in 2009

Wind Advisory 10, NWS Wakefield, VA

February 11, 200918 counties in Virginia; 4 counties in Maryland

NWS Wakefield, VA issued this wind advisory at Feb 11, 2009, 3:27 PM EST for 18 counties in Virginia; 4 counties in Maryland. It took effect at Feb 12, 2009, 9:00 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Feb 11, 2009, 3:27 PM EST (20:27 UTC)
In effect from: Feb 12, 2009, 9:00 AM EST
Expired: Feb 12, 2009, 5:00 PM EST
In force: 8 hr
Issued by: NWS Wakefield, VA

All 22 counties

Dorchester County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Accomack County, VA, Caroline County, VA, Charles City County, VA, City of Williamsburg, VA, Cumberland County, VA, Fluvanna County, VA, Gloucester County, VA, Goochland County, VA, James City County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Powhatan County, VA, Richmond County, VA, Westmoreland County, VA

The radar

The Norfolk radar (KAKQ), 88 km from the middle of the area, began a volume at 20:30 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.5 hours before the alert went out and 147 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: 1550 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 175 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 Wakefield, VA wrote its last area forecast discussion before this wind advisory went out at Feb 11, 3:22 PM EST, 5 minutes earlier.

Area forecast discussion, Feb 11, 3:22 PM EST, 5 minutes before

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Hazardous weather outlook, Feb 11, 4:09 AM EST, 11 hours 18 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 Wakefield, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 11, 3:34 AM EST	Gale Warning	AKQ		39 hr
Feb 11, 3:14 PM EST	Fire Weather Watch	AKQ	Accomack, Amelia, Brunswick, Caroline, Charles City, Cumberland and 29 more	14 hr

Nearby

Wind Advisories in Virginia, 2009 Wind Advisories in Maryland, 2009 Every wind advisory 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.