Alert archive / Virginia / High Wind Warnings in 2010

High Wind Warning 1, NWS Baltimore/Washington

February 25, 201019 counties in Virginia; 11 counties in Maryland; 7 counties in West Virginia

NWS Baltimore/Washington issued this high wind warning at Feb 25, 2010, 3:41 PM EST for 19 counties in Virginia; 11 counties in Maryland; 7 counties in West Virginia. It took effect at Feb 25, 2010, 10:00 PM EST. It was in force for 20 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 25, 2010, 3:41 PM EST (20:41 UTC)
In effect from: Feb 25, 2010, 10:00 PM EST
Expired: Feb 26, 2010, 6:00 PM EST
In force: 20 hr
Issued by: NWS Baltimore/Washington

All 37 counties

Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Madison County, VA, Page County, VA, Rappahannock 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

The radar

The Sterling radar (KLWX), 33 km from the middle of the area, began a volume at 20:39 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, 8.7 hours before the alert went out and 40 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: 852 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: -142 m²/s²
0-3 km storm-relative helicity: -73 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 high wind warning 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 high wind warning went out at Feb 25, 3:35 PM EST, 6 minutes earlier.

Area forecast discussion, Feb 25, 3:35 PM EST, 6 minutes before

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Hazardous weather outlook, Feb 25, 12:26 PM EST, 3 hours 15 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
Feb 25, 9:35 AM EST	High Wind Watch	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more	6 hr
Feb 25, 12:14 PM EST	Blizzard Warning	LWX		33 hr
Feb 25, 3:29 PM EST	Storm Warning	LWX		22 hr
Feb 25, 3:41 PM EST	Wind Advisory	LWX	Arlington, Culpeper, Fairfax, Fauquier, Greene, King George and 11 more	24 hr
Feb 25, 12:14 PM EST	Winter Weather Advisory	LWX	Allegany, Anne Arundel, Baltimore, Carroll, Frederick, Prince George's and 1 more	30 hr

Nearby

High Wind Warnings in Virginia, 2010 High Wind Warnings in Maryland, 2010 High Wind Warnings in West Virginia, 2010 Every high wind warning in 2010

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.