Alert archive / Kentucky / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 27, NWS Jackson, KY

April 9, 2020Harlan County, Letcher County, Perry County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Apr 9, 2020, 2:14 AM EDT for Harlan County, Letcher County, Perry County, Kentucky. It was in force for 16 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
Apr 9, 2020, 2:14 AM EDT (06:14 UTC)
Expired
Apr 9, 2020, 2:30 AM EDT
In force
16 min
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Harlan County, KY, Letcher County, KY, Perry County, KY

The radar

The Jackson,KY radar (KJKL), 61 km from the middle of the area, began a volume at 06:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 8, 10:51 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.2 hours before the alert went out and 269 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2020-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2020-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
2413 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
295 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 Apr 9, 2:00 AM EDT, 14 minutes earlier.

Area forecast discussion, Apr 9, 2:00 AM EDT, 14 minutes before
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Hazardous weather outlook, Apr 9, 1:30 AM EDT, 44 minutes before
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In the hours before

Local storm report, Apr 9, 1:03 AM EDT, 1 hour 11 minutes before
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Local storm report, Apr 9, 1:06 AM EDT, 1 hour 8 minutes before
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Local storm report, Apr 9, 1:19 AM EDT, 55 minutes before
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Local storm report, Apr 9, 1:29 AM EDT, 45 minutes before
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Special weather statement, Apr 9, 1:39 AM EDT, 35 minutes before
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Local storm report, Apr 9, 2:11 AM EDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 11:18 PM EDTSevere Thunderstorm WarningJKLBath, Elliott, Fleming, Menifee, Montgomery, Morgan and 1 more57 min
Apr 8, 11:28 PM EDTTornado WarningJKLFleming, Rowan32 min
Apr 9, 12:06 AM EDTSevere Thunderstorm WarningJKLBath, Elliott, Fleming, Menifee, Montgomery, Morgan and 1 more39 min
Apr 9, 12:21 AM EDTSevere Thunderstorm WarningJKLClay, Estill, Jackson, Laurel, Lee, Owsley and 2 more39 min
Apr 9, 12:44 AM EDTSpecial Weather StatementJKLBreathitt, Floyd, Johnson, Magoffin, Martin, Wolfe31 min
Apr 9, 12:56 AM EDTSevere Thunderstorm WarningJKLBreathitt, Clay, Estill, Jackson, Laurel, Lee and 2 more34 min
Apr 9, 12:57 AM EDTAreal Flood AdvisoryJKLEstill, Lee2 hr
Apr 9, 1:18 AM EDTSevere Thunderstorm WarningJKLBreathitt, Floyd, Knott, Letcher, Magoffin, Martin and 2 more42 min
Apr 9, 1:39 AM EDTSpecial Weather StatementJKLClay, Leslie36 min
Apr 9, 1:52 AM EDTSevere Thunderstorm WarningJKLFloyd, Harlan, Knott, Leslie, Letcher, Perry and 1 more23 min
Apr 9, 4:15 PM EDTFreeze WatchJKLBath, Bell, Breathitt, Clay, Elliott, Estill and 27 more12 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2020Every 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.