Alert archive / West Virginia / Freeze Warnings in 2016

Freeze Warning 7, NWS Baltimore/Washington

May 15, 2016Highland County, Virginia; Allegany County, Maryland; 5 counties in West Virginia

NWS Baltimore/Washington issued this freeze warning at May 15, 2016, 2:37 PM EDT for Highland County, Virginia; Allegany County, Maryland; 5 counties in West Virginia. It took effect at May 16, 2016, 12:00 AM EDT. It was in force for 8 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
May 15, 2016, 2:37 PM EDT (18:37 UTC)
In effect from
May 16, 2016, 12:00 AM EDT
Expired
May 16, 2016, 8:23 AM EDT
In force
8 hr
Issued by
NWS Baltimore/Washington

Counties Allegany County, MD, Highland County, VA, Grant County, WV, Hampshire County, WV, Hardy County, WV, Mineral County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 134 km from the middle of the area, began a volume at 18:39 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 (KAGC), launched 12:00Z, 6.6 hours before the alert went out and 174 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 12:00Z on 2016-05-15Temperature 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 12:00Z on 2016-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
1137 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
82 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
May 15, 3:35 AM EDTFreeze WatchLWXHighland11 hr
May 15, 4:01 AM EDTGale WarningLWX14 hr
May 15, 4:01 AM EDTSmall Craft AdvisoryLWX39 hr
May 15, 10:37 AM EDTSmall Craft AdvisoryLWX32 hr
May 15, 2:37 PM EDTFrost AdvisoryLWXAlbemarle, Amherst, Augusta, Clarke, Culpeper, Fauquier and 17 more18 hr

Nearby

Freeze Warnings in West Virginia, 2016Freeze Warnings in Virginia, 2016Freeze Warnings in Maryland, 2016Every freeze warning in 2016

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.