Alert archive / West Virginia / Wind Advisories in 2008

Wind Advisory 18, NWS Baltimore/Washington

December 28, 2008Allegany County, Maryland; Grant County, Mineral County, West Virginia

NWS Baltimore/Washington issued this wind advisory at Dec 28, 2008, 5:56 AM EST for Allegany County, Maryland; Grant County, Mineral County, West Virginia. It took effect at Dec 28, 2008, 7:00 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Dec 28, 2008, 5:56 AM EST (10:56 UTC)
In effect from
Dec 28, 2008, 7:00 AM EST
Expired
Dec 28, 2008, 3:01 PM EST
In force
8 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 10:58 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

Pittsburgh, PA (KPIT), launched 00:00Z, 10.9 hours before the alert went out and 151 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-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2008-12-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2008-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 264 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
4 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1280 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
264 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 28, 9:57 AM ESTGale WarningLWX7 hr
Dec 27, 7:32 PM ESTDense Fog AdvisoryLWXAllegany, Baltimore, Carroll, Frederick, Washington, City of Baltimore8 hr

Nearby

Wind Advisories in West Virginia, 2008Wind Advisories in Maryland, 2008Wind Advisories in Virginia, 2008Every wind advisory in 2008

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.