Alert archive / Virginia / Wind Advisories in 2010

Wind Advisory 5, NWS Baltimore/Washington

February 25, 201017 counties in Virginia; 9 counties in Maryland

NWS Baltimore/Washington issued this wind advisory at Feb 25, 2010, 3:41 PM EST for 17 counties in Virginia; 9 counties in Maryland. It took effect at Feb 25, 2010, 10:00 PM EST. It was in force for 17 hr.

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, 3:26 PM EST
In force: 17 hr
Issued by: NWS Baltimore/Washington

All 26 counties

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, Arlington County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Greene County, VA, King George County, VA, Madison County, VA, Nelson County, VA, Orange County, VA, Rappahannock County, VA, Spotsylvania County, VA, Stafford County, VA

The radar

The Sterling radar (KLWX), 37 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 33 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 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 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	High Wind Warning	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 13 more	26 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

Wind Advisories in Virginia, 2010 Wind Advisories in Maryland, 2010 Every wind advisory 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.