Alert archive / Virginia / Wind Advisories in 2015

Wind Advisory 1, NWS Baltimore/Washington

January 4, 201518 counties in Virginia; Allegany County, Maryland; 7 counties in West Virginia

NWS Baltimore/Washington issued this wind advisory at Jan 4, 2015, 12:26 PM EST for 18 counties in Virginia; Allegany County, Maryland; 7 counties in West Virginia. It took effect at Jan 4, 2015, 6:00 PM EST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jan 4, 2015, 12:26 PM EST (17:26 UTC)
In effect from: Jan 4, 2015, 6:00 PM EST
Expired: Jan 5, 2015, 9:00 AM EST
In force: 15 hr
Issued by: NWS Baltimore/Washington

All 26 counties

Allegany County, MD, Albemarle County, VA, Amherst County, VA, Augusta County, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 113 km from the middle of the area, began a volume at 17:26 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, 5.4 hours before the alert went out and 176 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: 898 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 85 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 Jan 3, 3:22 PM EST, 21 hours 4 minutes earlier.

Area forecast discussion, Jan 3, 3:22 PM EST, 21 hours 4 minutes before

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Hazardous weather outlook, Jan 3, 3:37 PM EST, 20 hours 49 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 4, 6:48 AM EST	Small Craft Advisory	LWX		16 hr

Nearby

Wind Advisories in Virginia, 2015 Wind Advisories in West Virginia, 2015 Wind Advisories in Maryland, 2015 Every wind advisory in 2015

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.