Alert archive / West Virginia / Freeze Warnings in 2020

Freeze Warning 5, NWS Blacksburg, VA

May 6, 2020Greenbrier County, West Virginia

NWS Blacksburg, VA issued this freeze warning at May 6, 2020, 3:17 AM EDT for Greenbrier County, West Virginia. It took effect at May 7, 2020, 1:00 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 6, 2020, 3:17 AM EDT (07:17 UTC)
In effect from
May 7, 2020, 1:00 AM EDT
Expired
May 7, 2020, 9:00 AM EDT
In force
8 hr
Issued by
NWS Blacksburg, VA

County Greenbrier County, WV

The radar

The Roanoke radar (KFCX), 104 km from the middle of the area, began a volume at 07:20 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.3 hours before the alert went out and 213 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, Greensboro/Hi Pt, NC at 00:00Z on 2020-05-06Temperature 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, Greensboro/Hi Pt, NC at 00:00Z on 2020-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 443 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
790 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
443 m²/s²
0-3 km storm-relative helicity
556 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 8:18 PM EDTSpecial Weather StatementRNKStokes27 min
May 5, 8:46 PM EDTSpecial Weather StatementRNKRockingham29 min
May 5, 9:14 PM EDTSpecial Weather StatementRNKCaswell, Rockingham46 min
May 5, 10:24 PM EDTSpecial Weather StatementRNKCaswell36 min
May 6, 3:14 PM EDTSpecial Weather StatementRNKCaswell31 min

Nearby

Freeze Warnings in West Virginia, 2020Every freeze warning in 2020

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.