Alert archive / Virginia / Wind Advisories in 2020

Wind Advisory 6, NWS Baltimore/Washington

February 6, 202019 counties in Virginia; 13 counties in Maryland; Berkeley County, Jefferson County, Morgan County, West Virginia

NWS Baltimore/Washington issued this wind advisory at Feb 6, 2020, 9:30 PM EST for 19 counties in Virginia; 13 counties in Maryland; Berkeley County, Jefferson County, Morgan County, West Virginia. It took effect at Feb 7, 2020, 7:00 AM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Feb 6, 2020, 9:30 PM EST (02:30 UTC)
In effect from: Feb 7, 2020, 7:00 AM EST
Expired: Feb 7, 2020, 5:09 PM EST
In force: 10 hr
Issued by: NWS Baltimore/Washington

All 35 counties

Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Albemarle County, VA, Amherst County, VA, Arlington County, VA, Augusta County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, Fairfax County, VA, Greene County, VA, King George County, VA, Loudoun County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Stafford County, VA, Warren County, VA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 25 km from the middle of the area, began a volume at 02:30 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

Roanoke, VA (KRNK), launched 00:00Z, 2.5 hours before the alert went out and 240 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: 589 m above ground
0-6 km bulk shear: 89 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: -43 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 6, 4:45 PM EST, 4 hours 45 minutes earlier.

Area forecast discussion, Feb 6, 4:45 PM EST, 4 hours 45 minutes before

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Hazardous weather outlook, Feb 6, 6:32 PM EST, 2 hours 58 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 6, 9:31 PM EST	Small Craft Advisory	LWX		32 hr
Feb 7, 4:08 AM EST	Dense Fog Advisory	LWX	Clarke, Fairfax, Fauquier, Loudoun, City of Fairfax	3 hr
Feb 7, 7:26 AM EST	Severe Thunderstorm Warning	LWX	Loudoun	34 min
Feb 7, 8:00 AM EST	Severe Thunderstorm Warning	LWX	Fairfax, Prince William, Stafford	19 min
Feb 7, 8:10 AM EST	Special Marine Warning	LWX		21 min
Feb 7, 8:51 AM EST	Special Marine Warning	LWX		28 min
Feb 7, 8:54 AM EST	Special Marine Warning	LWX		40 min
Feb 7, 9:00 AM EST	Special Marine Warning	LWX		22 min
Feb 7, 9:28 AM EST	Special Marine Warning	LWX		10 min
Feb 7, 7:37 AM EST	Tornado Warning	LWX	Frederick, Howard, Montgomery	23 min
Feb 7, 7:46 AM EST	Tornado Warning	LWX	Carroll, Frederick	29 min
Feb 7, 7:56 AM EST	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard, Montgomery	34 min
Feb 7, 8:13 AM EST	Tornado Warning	LWX	Carroll	17 min
Feb 7, 8:30 AM EST	Severe Thunderstorm Warning	LWX	Prince George's	19 min
Feb 7, 8:48 AM EST	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	27 min
Feb 7, 8:59 AM EST	Severe Thunderstorm Warning	LWX	Anne Arundel	11 min
Feb 7, 9:16 AM EST	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	13 min
Feb 7, 11:22 AM EST	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Harford, Saint Mary's, City of Baltimore	12 hr

Nearby

Wind Advisories in Virginia, 2020 Wind Advisories in Maryland, 2020 Wind Advisories in West Virginia, 2020 Every wind advisory in 2020

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.