Alert archive / Virginia / Wind Advisories in 2010

Wind Advisory 8, NWS Baltimore/Washington

October 21, 20106 counties in Virginia

NWS Baltimore/Washington issued this wind advisory at Oct 21, 2010, 2:28 PM EDT for 6 counties in Virginia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Oct 21, 2010, 2:28 PM EDT (18:28 UTC)
Expired
Oct 21, 2010, 5:09 PM EDT
In force
3 hr
Issued by
NWS Baltimore/Washington

Counties City of Charlottesville, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, Nelson County, VA, Rockingham County, VA

The radar

The Sterling radar (KLWX), 148 km from the middle of the area, began a volume at 18:27 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

Roanoke, VA (KRNK), launched 12:00Z, 6.5 hours before the alert went out and 122 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, Roanoke, VA at 12:00Z on 2010-10-21Temperature 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, Roanoke, VA at 12:00Z on 2010-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 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
1448 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
307 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
Oct 21, 3:17 AM EDTSmall Craft AdvisoryLWX41 hr
Oct 21, 5:10 AM EDTFreeze WatchLWX9 hr
Oct 21, 9:31 AM EDTRed Flag WarningLWXAugusta, Page, Rockingham, Shenandoah, City of Harrisonburg, City of Staunton10 hr
Oct 21, 2:28 PM EDTFreeze WarningLWX19 hr
Oct 21, 2:52 PM EDTFrost AdvisoryLWXRockingham, City of Harrisonburg, City of Staunton, City of Waynesboro18 hr

Nearby

Wind Advisories in Virginia, 2010Wind Advisories in West Virginia, 2010Every wind advisory in 2010

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.