Alert archive / West Virginia / Frost Advisories in 2023

Frost Advisory 3, NWS Charleston, WV

April 18, 202330 counties in West Virginia; 5 counties in Ohio; 4 counties in Kentucky

NWS Charleston, WV issued this frost advisory at Apr 18, 2023, 2:04 PM EDT for 30 counties in West Virginia; 5 counties in Ohio; 4 counties in Kentucky. It took effect at Apr 19, 2023, 12:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Apr 18, 2023, 2:04 PM EDT (18:04 UTC)
In effect from: Apr 19, 2023, 12:00 AM EDT
Expired: Apr 19, 2023, 9:00 AM EDT
In force: 9 hr
Issued by: NWS Charleston, WV

All 39 counties

Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Washington 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, 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), 39 km from the middle of the area, began a volume at 18:09 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 12:00Z, 6.1 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-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: 1091 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 217 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 Apr 18, 1:59 PM EDT, 5 minutes earlier.

Area forecast discussion, Apr 18, 1:59 PM EDT, 5 minutes before

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Hazardous weather outlook, Apr 18, 1:59 PM EDT, 5 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 4:38 AM EDT	Red Flag Warning	RLX	Barbour, Boone, Braxton, Calhoun, Clay, Fayette and 17 more	15 hr
Apr 18, 2:04 PM EDT	Freeze Warning	RLX	Athens, Morgan, Perry, Vinton	19 hr

Nearby

Frost Advisories in West Virginia, 2023 Frost Advisories in Ohio, 2023 Frost Advisories in Kentucky, 2023 Every frost advisory in 2023

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.