Alert archive / Virginia / Wind Advisories in 2018

Wind Advisory 10, NWS Baltimore/Washington

October 28, 201812 counties in Virginia; Grant County, Pendleton County, West Virginia

NWS Baltimore/Washington issued this wind advisory at Oct 28, 2018, 12:05 PM EDT for 12 counties in Virginia; Grant County, Pendleton County, West Virginia. It took effect at Oct 28, 2018, 6:00 PM EDT. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued
Oct 28, 2018, 12:05 PM EDT (16:05 UTC)
In effect from
Oct 28, 2018, 6:00 PM EDT
Expired
Oct 29, 2018, 6:37 AM EDT
In force
13 hr
Issued by
NWS Baltimore/Washington

Counties Albemarle County, VA, Amherst County, VA, Augusta County, VA, Greene County, VA, Highland County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Warren County, VA, Grant County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 136 km from the middle of the area, began a volume at 16:07 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, 4.1 hours before the alert went out and 141 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 2018-10-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Roanoke, VA at 12:00Z on 2018-10-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
700 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
118 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 28, 6:00 AM EDTCoastal Flood AdvisoryLWXArlington, City of Alexandria, City of Falls Church6 hr
Oct 28, 12:01 PM EDTCoastal Flood AdvisoryLWXArlington, City of Alexandria, City of Falls Church90 min
Oct 27, 8:43 PM EDTCoastal Flood AdvisoryLWXSaint Mary's11 hr

Nearby

Wind Advisories in Virginia, 2018Wind Advisories in West Virginia, 2018Every wind advisory in 2018

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.