Alert archive / Kentucky / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 56, NWS Jackson, KY

June 21, 2020Harlan County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Jun 21, 2020, 5:10 PM EDT for Harlan County, Kentucky. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 2020, 5:10 PM EDT (21:10 UTC)
Expired: Jun 21, 2020, 5:34 PM EDT
In force: 24 min
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Harlan County, KY

The radar

The Knoxville radar (KMRX), 78 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 291 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: 26 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 27 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 severe thunderstorm 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 severe thunderstorm warning went out at Jun 21, 4:03 PM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jun 21, 4:03 PM EDT, 1 hour 7 minutes before

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Hazardous weather outlook, Jun 21, 3:14 PM EDT, 1 hour 56 minutes before

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In the hours before

Special weather statement, Jun 21, 4:34 PM EDT, 36 minutes before

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Special weather statement, Jun 21, 4:46 PM EDT, 24 minutes before

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Local storm report, Jun 21, 4:53 PM EDT, 17 minutes before

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Special weather statement, Jun 21, 4:56 PM EDT, 14 minutes before

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Special weather statement, Jun 21, 4:58 PM EDT, 12 minutes before

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Local storm report, Jun 21, 5:04 PM EDT, 6 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
Jun 21, 1:23 PM EDT	Special Weather Statement	JKL	McCreary, Pulaski	22 min
Jun 21, 2:03 PM EDT	Special Weather Statement	JKL	Pulaski, Rockcastle, Whitley	27 min
Jun 21, 2:38 PM EDT	Special Weather Statement	JKL	Laurel	37 min
Jun 21, 2:43 PM EDT	Severe Thunderstorm Warning	JKL	Jackson, Laurel, Rockcastle, Whitley	47 min
Jun 21, 3:15 PM EDT	Severe Thunderstorm Warning	JKL	Estill, Jackson, Lee, Owsley	45 min
Jun 21, 3:40 PM EDT	Special Weather Statement	JKL	Fleming	35 min
Jun 21, 3:43 PM EDT	Special Weather Statement	JKL	Clay, Owsley	32 min
Jun 21, 3:58 PM EDT	Special Weather Statement	JKL	Lee, Menifee, Powell, Wolfe	32 min
Jun 21, 4:03 PM EDT	Special Weather Statement	JKL	Breathitt	27 min
Jun 21, 4:23 PM EDT	Special Weather Statement	JKL	Menifee, Wolfe	37 min
Jun 21, 4:24 PM EDT	Special Weather Statement	JKL	Bath	36 min
Jun 21, 4:28 PM EDT	Special Weather Statement	JKL	Breathitt	32 min
Jun 21, 4:34 PM EDT	Special Weather Statement	JKL	Breathitt	26 min
Jun 21, 4:46 PM EDT	Special Weather Statement	JKL	Elliott, Morgan	29 min
Jun 21, 4:56 PM EDT	Special Weather Statement	JKL	Johnson, Magoffin	34 min
Jun 21, 4:58 PM EDT	Special Weather Statement	JKL	Rowan	32 min
Jun 21, 5:16 PM EDT	Special Weather Statement	JKL	Elliott, Morgan	29 min
Jun 21, 5:23 PM EDT	Special Weather Statement	JKL	Wayne	37 min
Jun 21, 5:30 PM EDT	Special Weather Statement	JKL	Floyd, Johnson, Magoffin, Martin	30 min
Jun 21, 5:33 PM EDT	Special Weather Statement	JKL	Harlan	27 min
Jun 21, 5:45 PM EDT	Special Weather Statement	JKL	Elliott	30 min
Jun 21, 5:59 PM EDT	Special Weather Statement	JKL	Floyd, Johnson, Letcher	31 min
Jun 21, 6:00 PM EDT	Special Weather Statement	JKL	McCreary, Pulaski	30 min
Jun 21, 6:12 PM EDT	Severe Thunderstorm Warning	JKL	McCreary, Wayne, Whitley	33 min
Jun 21, 6:29 PM EDT	Special Weather Statement	JKL	Floyd, Letcher, Martin, Pike	31 min
Jun 21, 6:30 PM EDT	Special Weather Statement	JKL	McCreary, Pulaski, Rockcastle, Whitley	30 min
Jun 21, 6:45 PM EDT	Severe Thunderstorm Warning	JKL	Knox, Laurel, McCreary, Whitley	30 min
Jun 21, 6:59 PM EDT	Special Weather Statement	JKL	Laurel, Rockcastle	31 min
Jun 21, 7:08 PM EDT	Severe Thunderstorm Warning	JKL	Clay, Jackson, Laurel, Pulaski, Whitley	37 min
Jun 21, 7:28 PM EDT	Special Weather Statement	JKL	Clay, Jackson, Rockcastle	32 min
Jun 21, 7:38 PM EDT	Special Weather Statement	JKL	Knox	37 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2020 Every severe thunderstorm 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.