Alert archive / West Virginia / Winter Storm Warnings in 2018

Winter Storm Warning 2, NWS Baltimore/Washington

February 6, 2018Allegany County, Washington County, Maryland; 4 counties in West Virginia

NWS Baltimore/Washington issued this winter storm warning at Feb 6, 2018, 2:00 PM EST for Allegany County, Washington County, Maryland; 4 counties in West Virginia. It took effect at Feb 7, 2018, 3:00 AM EST. It was in force for 13 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 6, 2018, 2:00 PM EST (19:00 UTC)
In effect from: Feb 7, 2018, 3:00 AM EST
Expired: Feb 7, 2018, 3:41 PM EST
In force: 13 hr
Issued by: NWS Baltimore/Washington

Counties Allegany County, MD, Washington County, MD, Berkeley County, WV, Hampshire County, WV, Mineral County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 97 km from the middle of the area, began a volume at 19:07 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

Pittsburgh, PA (KAGC), launched 12:00Z, 7.0 hours before the alert went out and 177 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: 672 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 313 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 winter storm 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 winter storm warning went out at Feb 6, 10:25 AM EST, 3 hours 35 minutes earlier.

Area forecast discussion, Feb 6, 10:25 AM EST, 3 hours 35 minutes before

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Hazardous weather outlook, Feb 6, 5:01 AM EST, 8 hours 59 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, 4:02 AM EST	Winter Weather Advisory	LWX	Albemarle, Amherst, Arlington, Augusta, Clarke, Culpeper and 26 more	38 hr
Feb 6, 2:24 PM EST	Gale Warning	LWX		35 hr
Feb 6, 2:24 PM EST	Small Craft Advisory	LWX		28 hr

Nearby

Winter Storm Warnings in West Virginia, 2018 Winter Storm Warnings in Maryland, 2018 Every winter storm warning in 2018

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.