Alert archive / Kentucky / Winter Storm Warnings in 2020

Winter Storm Warning 1, NWS Jackson, KY

December 23, 202024 counties in Kentucky

NWS Jackson, KY issued this winter storm warning at Dec 23, 2020, 1:32 PM EST for 24 counties in Kentucky. It took effect at Dec 24, 2020, 1:00 PM EST. It was in force for 16 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: Dec 23, 2020, 1:32 PM EST (18:32 UTC)
In effect from: Dec 24, 2020, 1:00 PM EST
Expired: Dec 25, 2020, 5:22 AM EST
In force: 16 hr
Issued by: NWS Jackson, KY

All 24 counties

Bell County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY

The radar

The Jackson,KY radar (KJKL), 17 km from the middle of the area, began a volume at 18:32 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, 6.5 hours before the alert went out and 225 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: 2824 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 239 m²/s²
0-3 km storm-relative helicity: 267 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 winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, KY wrote its last area forecast discussion before this winter storm warning went out at Dec 23, 1:11 PM EST, 21 minutes earlier.

Area forecast discussion, Dec 23, 1:11 PM EST, 21 minutes before

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Hazardous weather outlook, Dec 23, 5:29 AM EST, 8 hours 3 minutes before

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The office that day

Everything else NWS Jackson, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 23, 4:51 AM EST	Winter Storm Watch	JKL	Bell, Breathitt, Clay, Elliott, Floyd, Harlan and 13 more	9 hr
Dec 23, 1:32 PM EST	Winter Weather Advisory	JKL	Bath, Bell, Breathitt, Clay, Elliott, Estill and 27 more	50 hr

Nearby

Winter Storm Warnings in Kentucky, 2020 Every winter storm 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.