Alert archive / Virginia / Wind Advisories in 2015

Wind Advisory 11, NWS Baltimore/Washington

April 22, 201521 counties in Virginia; 4 counties in Maryland; 8 counties in West Virginia

NWS Baltimore/Washington issued this wind advisory at Apr 22, 2015, 4:10 AM EDT for 21 counties in Virginia; 4 counties in Maryland; 8 counties in West Virginia. It took effect at Apr 22, 2015, 10:39 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Apr 22, 2015, 4:10 AM EDT (08:10 UTC)
In effect from: Apr 22, 2015, 10:39 AM EDT
Expired: Apr 22, 2015, 7:18 PM EDT
In force: 9 hr
Issued by: NWS Baltimore/Washington

All 33 counties

Allegany County, MD, Carroll County, MD, Frederick County, MD, Washington 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, Clarke County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Loudoun 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, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 90 km from the middle of the area, began a volume at 08:10 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 00:00Z, 8.2 hours before the alert went out and 198 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: 2632 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 70 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 Apr 22, 4:00 AM EDT, 10 minutes earlier.

Area forecast discussion, Apr 22, 4:00 AM EDT, 10 minutes before

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Hazardous weather outlook, Apr 21, 7:20 PM EDT, 8 hours 50 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
Apr 22, 4:52 AM EDT	Small Craft Advisory	LWX		65 hr
Apr 22, 12:19 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	25 min
Apr 22, 7:19 PM EDT	Small Craft Advisory	LWX		25 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.