Alert archive / Kentucky / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 81, NWS Jackson, KY

July 21, 2018Wayne County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Jul 21, 2018, 1:02 AM EDT for Wayne 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: Jul 21, 2018, 1:02 AM EDT (05:02 UTC)
Expired: Jul 21, 2018, 1:26 AM EDT
In force: 24 min
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Wayne County, KY

The radar

The Knoxville radar (KMRX), 146 km from the middle of the area, began a volume at 05:04 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

Nashville Metro, TN (KBNA), launched 00:00Z, 5.0 hours before the alert went out and 175 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: 3305 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1217 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 11.6

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 Jul 21, 12:02 AM EDT, 1 hour earlier.

Area forecast discussion, Jul 21, 12:02 AM EDT, 1 hour before

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Hazardous weather outlook, Jul 20, 11:58 PM EDT, 1 hour 4 minutes before

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In the hours before

Local storm report, Jul 20, 11:34 PM EDT, 1 hour 28 minutes before

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Local storm report, Jul 20, 11:35 PM EDT, 1 hour 27 minutes before

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Local storm report, Jul 20, 11:41 PM EDT, 1 hour 21 minutes before

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Local storm report, Jul 21, 12:04 AM EDT, 58 minutes before

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Special weather statement, Jul 21, 12:13 AM EDT, 49 minutes before

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Special weather statement, Jul 21, 12:54 AM EDT, 8 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
Jul 20, 8:07 PM EDT	Severe Thunderstorm Warning	JKL	Clay, Jackson, Laurel, Rockcastle	23 min
Jul 20, 8:15 PM EDT	Special Weather Statement	JKL	McCreary, Pulaski, Wayne	45 min
Jul 20, 8:19 PM EDT	Special Weather Statement	JKL	Bell, Knox, Whitley	41 min
Jul 20, 8:27 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Knox, Laurel, Whitley	48 min
Jul 20, 8:32 PM EDT	Severe Thunderstorm Warning	JKL	McCreary, Pulaski, Wayne, Whitley	43 min
Jul 20, 8:38 PM EDT	Special Weather Statement	JKL	Harlan	52 min
Jul 20, 8:39 PM EDT	Areal Flood Advisory	JKL	Harlan, Letcher	2 hr
Jul 20, 8:41 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Harlan, Knox	49 min
Jul 20, 8:56 PM EDT	Special Weather Statement	JKL	Harlan	49 min
Jul 20, 9:01 PM EDT	Severe Thunderstorm Warning	JKL	Harlan, Leslie	44 min
Jul 20, 9:05 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Knox, McCreary, Whitley	40 min
Jul 20, 9:12 PM EDT	Special Weather Statement	JKL	Bath, Fleming	48 min
Jul 20, 9:27 PM EDT	Special Weather Statement	JKL	Estill, Montgomery, Powell	48 min
Jul 20, 9:39 PM EDT	Special Weather Statement	JKL	Bell	51 min
Jul 20, 10:12 PM EDT	Special Weather Statement	JKL	Estill, Lee	48 min
Jul 20, 10:51 PM EDT	Special Weather Statement	JKL	Wayne	39 min
Jul 20, 11:53 PM EDT	Areal Flood Advisory	JKL	Laurel, Pulaski, Rockcastle	3 hr
Jul 21, 12:13 AM EDT	Special Weather Statement	JKL	McCreary, Pulaski, Wayne, Whitley	47 min
Jul 21, 12:54 AM EDT	Special Weather Statement	JKL	McCreary, Wayne, Whitley	51 min
Jul 21, 1:22 AM EDT	Special Weather Statement	JKL	Whitley	38 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2018 Every severe thunderstorm warning in 2018

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.