Alert archive / West Virginia / Wind Advisories in 2009

Wind Advisory 4, NWS Baltimore/Washington

March 8, 20095 counties in Maryland; 6 counties in West Virginia

NWS Baltimore/Washington issued this wind advisory at Mar 8, 2009, 3:04 PM EDT for 5 counties in Maryland; 6 counties in West Virginia. It took effect at Mar 9, 2009, 5:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Mar 8, 2009, 3:04 PM EDT (19:04 UTC)
In effect from
Mar 9, 2009, 5:00 AM EDT
Expired
Mar 9, 2009, 2:00 PM EDT
In force
9 hr
Issued by
NWS Baltimore/Washington

Counties Allegany County, MD, Baltimore County, MD, Carroll County, MD, Frederick County, MD, Washington County, MD, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Mineral County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 74 km from the middle of the area, began a volume at 19:09 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.1 hours before the alert went out and 82 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, Washington/Dulle, VA at 12:00Z on 2009-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2009-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2215 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
57 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
Mar 8, 4:13 AM EDTSmall Craft AdvisoryLWX44 hr

Nearby

Wind Advisories in West Virginia, 2009Wind Advisories in Maryland, 2009Wind Advisories in Virginia, 2009Every wind advisory 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.