Alert archive / Virginia / Winter Storm Warnings in 2013

Winter Storm Warning 8, NWS Baltimore/Washington

March 23, 201313 counties in Virginia; Allegany County, Washington County, Maryland; 8 counties in West Virginia

NWS Baltimore/Washington issued this winter storm warning at Mar 23, 2013, 8:45 PM EDT for 13 counties in Virginia; Allegany County, Washington County, Maryland; 8 counties in West Virginia. It took effect at Mar 24, 2013, 2:00 PM EDT. It was in force for 22 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
Mar 23, 2013, 8:45 PM EDT (00:45 UTC)
In effect from
Mar 24, 2013, 2:00 PM EDT
Expired
Mar 25, 2013, 11:36 AM EDT
In force
22 hr
Issued by
NWS Baltimore/Washington
All 23 counties

Allegany County, MD, Washington County, MD, City of Charlottesville, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Frederick County, VA, Highland County, VA, Nelson County, VA, Page County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 97 km from the middle of the area, began a volume at 00:50 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, 0.8 hours before the alert went out and 212 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 2013-03-24Temperature 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, Pittsburgh, PA at 00:00Z on 2013-03-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.1939587897117136156Sfc1 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
1370 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
139 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 24, 1:30 AM EDTSmall Craft AdvisoryLWX44 hr
Mar 24, 4:26 AM EDTWinter Weather AdvisoryLWXArlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 19 more38 hr

Nearby

Winter Storm Warnings in Virginia, 2013Winter Storm Warnings in West Virginia, 2013Winter Storm Warnings in Maryland, 2013Every winter storm warning in 2013

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.