Alert archive / West Virginia / Frost Advisories in 2018

Frost Advisory 6, NWS Charleston, WV

October 17, 201831 counties in West Virginia; Gallia County, Lawrence County, Meigs County, Ohio; 4 counties in Kentucky

NWS Charleston, WV issued this frost advisory at Oct 17, 2018, 3:18 AM EDT for 31 counties in West Virginia; Gallia County, Lawrence County, Meigs County, Ohio; 4 counties in Kentucky. It took effect at Oct 18, 2018, 1:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Oct 17, 2018, 3:18 AM EDT (07:18 UTC)
In effect from: Oct 18, 2018, 1:00 AM EDT
Expired: Oct 18, 2018, 10:00 AM EDT
In force: 9 hr
Issued by: NWS Charleston, WV

All 38 counties

Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Gallia County, OH, Lawrence County, OH, Meigs County, OH, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Pleasants County, WV, Putnam County, WV, Raleigh County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 36 km from the middle of the area, began a volume at 07:21 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.3 hours before the alert went out and 219 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1444 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, WV wrote its last area forecast discussion before this frost advisory went out at Oct 17, 2:00 AM EDT, 1 hour 18 minutes earlier.

Area forecast discussion, Oct 17, 2:00 AM EDT, 1 hour 18 minutes before

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The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 17, 3:18 AM EDT	Freeze Watch	RLX	Fayette, Jackson, Nicholas, Pleasants, Pocahontas, Raleigh and 6 more	11 hr
Oct 17, 6:34 AM EDT	Freeze Warning	RLX	Nicholas, Pocahontas, Randolph, Webster	27 hr

Nearby

Frost Advisories in West Virginia, 2018 Frost Advisories in Kentucky, 2018 Frost Advisories in Ohio, 2018 Every frost 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.