Alert archive / Kentucky / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 10, NWS Jackson, KY

March 20, 2020Breathitt County, Knott County, Magoffin County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Mar 20, 2020, 7:09 PM EDT for Breathitt County, Knott County, Magoffin County, Kentucky. It was in force for 51 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: Mar 20, 2020, 7:09 PM EDT (23:09 UTC)
Expired: Mar 20, 2020, 8:00 PM EDT
In force: 51 min
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Breathitt County, KY, Knott County, KY, Magoffin County, KY

The radar

The Jackson,KY radar (KJKL), 19 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 220 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: 106 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 731 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 371 m²/s²
0-3 km storm-relative helicity: 430 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.9

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 Mar 20, 5:50 PM EDT, 1 hour 19 minutes earlier.

Area forecast discussion, Mar 20, 5:50 PM EDT, 1 hour 19 minutes before

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Hazardous weather outlook, Mar 20, 4:15 PM EDT, 2 hours 54 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Jackson KY
415 PM EDT Fri Mar 20 2020

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-212315-
Fleming-Montgomery-Bath-Rowan-Estill-Powell-Menifee-Rockcastle-
Jackson-Pulaski-Laurel-Wayne-McCreary-Whitley-Knox-Bell-Harlan-
Elliott-Morgan-Johnson-Wolfe-Magoffin-Floyd-Lee-Breathitt-Knott-
Owsley-Perry-Clay-Leslie-Letcher-Martin-Pike-
Including the cities of Flemingsburg, Camargo, Jeffersonville,
Mount Sterling, Owingsville, Morehead, Irvine, Ravenna,
Clay City, Stanton, Frenchburg, Brodhead, Mount Vernon, McKee,
Annville, Burnside, Somerset, London, Monticello, Stearns,
Whitley City, Corbin, Williamsburg, Barbourville, Middlesboro,
Pineville, Cumberland, Harlan, Sandy Hook, West Liberty,
Paintsville, Campton, Salyersville, Prestonsburg, Wheelwright,
Beattyville, Jackson, Hindman, Pippa Passes, Booneville, Hazard,
Manchester, Hyden, Jenkins, Whitesburg, Inez, Coal Run,
Elkhorn City, Pikeville, and South Williamson
415 PM EDT Fri Mar 20 2020

This hazardous weather outlook is for portions of eastern Kentucky.

.DAY ONE...Tonight.

Thunderstorms will be possible through early this evening. Some
storms may contain strong winds gusts or even an isolated tornado.
Additionally, locally heavy rainfall will be possible where
multiple storms pass repeatedly across the same areas.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Thunderstorms are possible Tuesday afternoon through Tuesday
night, and again on Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to call in any storm or flood report
through tonight.

GREIF/DJ

In the hours before

Special weather statement, Mar 20, 3:26 PM EDT, 3 hours 43 minutes before

Special Weather Statement
National Weather Service JACKSON KY
326 PM EDT Fri Mar 20 2020

KYZ112-114>117-202030-
Clay-Breathitt-Perry-Owsley-Leslie-
326 PM EDT Fri Mar 20 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN OWSLEY...NORTHWESTERN
LESLIE...NORTHWESTERN PERRY...SOUTHWESTERN BREATHITT AND NORTHERN
CLAY COUNTIES...

At 325 PM EDT, a developing thunderstorm was located over
Chestnutburg, or 10 miles north of Manchester, moving east at 25 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Buckhorn, Blake, Shoal, Southfork, Cowcreek, Treadway, Barcreek,
Beech, Chestnutburg, Shepherdtown, Saul, Sacker Gap, Morris Fork,
Valjean, Toulouse, Taff, Crockettsville, Oneida, Arnett and Conkling.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3728 8389 3731 8388 3733 8383 3733 8379
      3734 8378 3737 8381 3740 8382 3749 8339
      3723 8334 3720 8387
TIME...MOT...LOC 1925Z 260DEG 20KT 3730 8380

GREIF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 19, 11:44 PM EDT	River Flood Advisory	JKL	Lee	45 hr
Mar 19, 11:44 PM EDT	River Flood Advisory	JKL	Estill	23 hr
Mar 20, 6:21 AM EDT	Areal Flood Advisory	JKL	Bath, Estill, Menifee, Montgomery, Powell	114 min
Mar 20, 6:50 AM EDT	Areal Flood Advisory	JKL	Clay, Jackson, Laurel, Pulaski, Rockcastle, Wayne	115 min
Mar 20, 8:10 AM EDT	Areal Flood Advisory	JKL	Estill, Jackson, Laurel, Lee, Owsley, Pulaski and 2 more	110 min
Mar 20, 3:26 PM EDT	Special Weather Statement	JKL	Owsley	64 min
Mar 20, 3:45 PM EDT	Severe Thunderstorm Warning	JKL	Breathitt, Clay, Leslie, Owsley, Perry	45 min
Mar 20, 3:53 PM EDT	Tornado Warning	JKL	Leslie, Owsley, Perry	37 min
Mar 20, 4:23 PM EDT	Severe Thunderstorm Warning	JKL	Knott, Perry	22 min
Mar 20, 7:30 PM EDT	Severe Thunderstorm Warning	JKL	Breathitt, Jackson, Owsley, Perry	33 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.