Alert archive / West Virginia / Winter Storm Warnings in 2009

Winter Storm Warning 3, NWS Baltimore/Washington

February 18, 2009Allegany County, Maryland; Grant County, Mineral County, West Virginia

NWS Baltimore/Washington issued this winter storm warning at Feb 18, 2009, 2:55 PM EST for Allegany County, Maryland; Grant County, Mineral County, West Virginia. It took effect at Feb 19, 2009, 12:00 AM EST. It was in force for 34 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 18, 2009, 2:55 PM EST (19:55 UTC)
In effect from: Feb 19, 2009, 12:00 AM EST
Expired: Feb 20, 2009, 10:29 AM EST
In force: 34 hr
Issued by: NWS Baltimore/Washington

Counties Allegany County, MD, Grant County, WV, Mineral County, WV

The radar

The Sterling radar (KLWX), 134 km from the middle of the area, began a volume at 19:58 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.9 hours before the alert went out and 245 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: 1389 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 282 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 18, 2:45 PM EST, 10 minutes earlier.

Area forecast discussion, Feb 18, 2:45 PM EST, 10 minutes before

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Hazardous weather outlook, Feb 18, 11:58 AM EST, 2 hours 57 minutes before

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In the hours before

Special weather statement, Feb 18, 9:48 AM EST, 5 hours 7 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 17, 10:15 PM EST	Winter Weather Advisory	LWX	Clarke, Frederick, Greene, Nelson, Page, Rockingham and 7 more	14 hr
Feb 18, 2:46 PM EST	Gale Warning	LWX		48 hr
Feb 18, 2:55 PM EST	Winter Weather Advisory	LWX		44 hr
Feb 18, 2:56 PM EST	Wind Advisory	LWX		37 hr

Nearby

Winter Storm Warnings in West Virginia, 2009 Winter Storm Warnings in Maryland, 2009 Every winter storm warning in 2009

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.