Alert archive / West Virginia / Winter Storm Warnings in 2017

Winter Storm Warning 5, NWS Baltimore/Washington

December 30, 2017Grant County, Pendleton County, West Virginia

NWS Baltimore/Washington issued this winter storm warning at Dec 30, 2017, 11:32 AM EST for Grant County, Pendleton County, West Virginia. It was in force for 6 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: Dec 30, 2017, 11:32 AM EST (16:32 UTC)
Expired: Dec 30, 2017, 6:00 PM EST
In force: 6 hr
Issued by: NWS Baltimore/Washington

Counties Grant County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 155 km from the middle of the area, began a volume at 16:32 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, 4.5 hours before the alert went out and 183 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: 693 m above ground
0-6 km bulk shear: 125 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 341 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 Dec 30, 11:00 AM EST, 32 minutes earlier.

Area forecast discussion, Dec 30, 11:00 AM EST, 32 minutes before

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Hazardous weather outlook, Dec 30, 10:54 AM EST, 38 minutes before

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In the hours before

Local storm report, Dec 30, 9:03 AM EST, 2 hours 29 minutes before

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Local storm report, Dec 30, 9:18 AM EST, 2 hours 14 minutes before

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Local storm report, Dec 30, 9:52 AM EST, 1 hour 40 minutes before

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Local storm report, Dec 30, 10:01 AM EST, 1 hour 31 minutes before

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Local storm report, Dec 30, 10:42 AM EST, 50 minutes before

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Local storm report, Dec 30, 11:11 AM EST, 21 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
Dec 30, 2:12 PM EST	Wind Chill Advisory	LWX	Albemarle, Amherst, Augusta, Greene, Highland, Madison and 6 more	69 hr
Dec 30, 1:55 PM EST	Special Weather Statement	LWX	Frederick	35 min

Nearby

Winter Storm Warnings in West Virginia, 2017 Every winter storm warning 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.