Alert archive / Virginia / Frost Advisories in 2005

Frost Advisory 2, NWS Baltimore/Washington

October 26, 200513 counties in Virginia; 4 counties in Maryland; Berkeley County, Jefferson County, West Virginia

NWS Baltimore/Washington issued this frost advisory at Oct 26, 2005, 5:24 AM EDT for 13 counties in Virginia; 4 counties in Maryland; Berkeley County, Jefferson County, West Virginia. It took effect at Oct 27, 2005, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Oct 26, 2005, 5:24 AM EDT (09:24 UTC)
In effect from
Oct 27, 2005, 2:00 AM EDT
Expired
Oct 27, 2005, 8:00 AM EDT
In force
6 hr
Issued by
NWS Baltimore/Washington

Counties Baltimore County, MD, Carroll County, MD, Frederick County, MD, Washington County, MD, City of Charlottesville, VA, City of Fairfax, VA, City of Fredericksburg, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Greene County, VA, Madison County, VA, Nelson County, VA, Orange County, VA, Rappahannock County, VA, Spotsylvania County, VA, Stafford County, VA, Berkeley County, WV, Jefferson County, WV

The radar

The Sterling radar (KLWX), 36 km from the middle of the area, began a volume at 09:24 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 00:00Z, 9.4 hours before the alert went out and 40 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 00:00Z on 2005-10-26Temperature 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 00:00Z on 2005-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939Sfc1 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
518 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

Nearby

Frost Advisories in Virginia, 2005Frost Advisories in Maryland, 2005Frost Advisories in West Virginia, 2005Every frost advisory in 2005

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.