Alert archive / Virginia / Wind Chill Advisories in 2017

Wind Chill Advisory 1, NWS Baltimore/Washington

January 6, 201715 counties in Virginia; Allegany County, Maryland; 4 counties in West Virginia

NWS Baltimore/Washington issued this wind chill advisory at Jan 6, 2017, 2:12 PM EST for 15 counties in Virginia; Allegany County, Maryland; 4 counties in West Virginia. It took effect at Jan 7, 2017, 5:00 PM EST. It was in force for 35 hr.

The area

The counties it named.

The facts

Issued: Jan 6, 2017, 2:12 PM EST (19:12 UTC)
In effect from: Jan 7, 2017, 5:00 PM EST
Expired: Jan 9, 2017, 3:32 AM EST
In force: 35 hr
Issued by: NWS Baltimore/Washington

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, Greene County, VA, Highland County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Warren County, VA, Grant County, WV, Hardy County, WV, Mineral County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 131 km from the middle of the area, began a volume at 19:10 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 12:00Z, 7.2 hours before the alert went out and 154 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: 721 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 190 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 chill 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 chill advisory went out at Jan 6, 10:21 AM EST, 3 hours 51 minutes earlier.

Area forecast discussion, Jan 6, 10:21 AM EST, 3 hours 51 minutes before

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Hazardous weather outlook, Jan 6, 8:57 AM EST, 5 hours 15 minutes before

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In the hours before

Local storm report, Jan 6, 8:46 AM EST, 5 hours 26 minutes before

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Local storm report, Jan 6, 9:07 AM EST, 5 hours 5 minutes before

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Local storm report, Jan 6, 9:45 AM EST, 4 hours 27 minutes before

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Local storm report, Jan 6, 9:46 AM EST, 4 hours 26 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 6, 5:02 AM EST	Small Craft Advisory	LWX		3 days
Jan 6, 8:48 AM EST	Winter Weather Advisory	LWX	Albemarle, Amherst, Arlington, Augusta, Culpeper, Fairfax and 20 more	30 hr
Jan 6, 7:13 AM EST	Winter Storm Warning	LWX	Calvert, Saint Mary's	34 hr

Nearby

Wind Chill Advisories in Virginia, 2017 Wind Chill Advisories in West Virginia, 2017 Wind Chill Advisories in Maryland, 2017 Every wind chill advisory in 2017

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.