Alert archive / Kentucky / Winter Storm Warnings in 2009

Winter Storm Warning 3, NWS Jackson, KY

December 18, 200930 counties in Kentucky

NWS Jackson, KY issued this winter storm warning at Dec 18, 2009, 4:50 AM EST for 30 counties in Kentucky. It took effect at Dec 18, 2009, 4:00 PM EST. It was in force for 35 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 18, 2009, 4:50 AM EST (09:50 UTC)
In effect from: Dec 18, 2009, 4:00 PM EST
Expired: Dec 20, 2009, 3:04 AM EST
In force: 35 hr
Issued by: NWS Jackson, KY

All 30 counties

Bath County, KY, Bell County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming 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, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY

The radar

The Jackson,KY radar (KJKL), 16 km from the middle of the area, began a volume at 09:48 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, 9.8 hours before the alert went out and 215 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: 1853 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 183 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 18, 3:40 AM EST, 1 hour 10 minutes earlier.

Area forecast discussion, Dec 18, 3:40 AM EST, 1 hour 10 minutes before

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Hazardous weather outlook, Dec 17, 4:32 PM EST, 12 hours 18 minutes before

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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 Jackson, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 18, 4:50 AM EST	Winter Weather Advisory	JKL	Bath, Bell, Breathitt, Elliott, Estill, Fleming and 22 more	53 hr

Nearby

Winter Storm Warnings in Kentucky, 2009 Every winter storm warning in 2009

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.