Alert archive / Kentucky / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, KY

May 4, 2021Harlan County, Kentucky

NWS Jackson, KY issued this special weather statement at May 4, 2021, 2:06 AM 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 outline as issued.

The facts

Issued
May 4, 2021, 2:06 AM EDT (06:06 UTC)
Expired
May 4, 2021, 2:30 AM EDT
In force
24 min
Issued by
NWS Jackson, KY

County Harlan County, KY

The radar

The Knoxville radar (KMRX), 66 km from the middle of the area, began a volume at 06:08 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, 6.1 hours before the alert went out and 305 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, Nashville Metro, TN at 00:00Z on 2021-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2263 joules per kilogram.LCLEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 2021-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.19395878Sfc1 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
2263 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.6

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 3, 10:59 PM EDT, 3 hours 7 minutes earlier.

Area forecast discussion, May 3, 10:59 PM EDT, 3 hours 7 minutes before
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Hazardous weather outlook, May 3, 10:31 PM EDT, 3 hours 35 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, May 4, 1:19 AM EDT, 47 minutes before
Special Weather Statement
National Weather Service JACKSON KY
119 AM EDT Tue May 4 2021

KYZ086>088-040545-
Knox-Bell-Harlan-
119 AM EDT Tue May 4 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN HARLAN...EAST
CENTRAL BELL AND SOUTH CENTRAL KNOX COUNTIES...

At 118 AM EDT, a strong thunderstorm was located over Wallsend, or
over Pineville, moving east at 25 mph.

Winds in excess of 30 mph and penny size hail are possible with this
storm.

Locations impacted include...
Pineville, Wallins Creek, East Pineville, Wallsend, Varilla,
Coldiron, Ingram, Ponza, Stony Fork Junction, Black Snake, Kentenia,
Tacky Town, Straight Creek, Blanche, Cary, Cubage, Rella, Fourmile,
Clear Creek Springs and Wasioto.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3673 8382 3682 8384 3689 8338 3669 8336
      3667 8340 3666 8344
TIME...MOT...LOC 0518Z 268DEG 23KT 3677 8373

JMW
Special weather statement, May 4, 2:06 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service JACKSON KY
206 AM EDT Tue May 4 2021

KYZ088-040630-
Harlan-
206 AM EDT Tue May 4 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN HARLAN COUNTY...

At 205 AM EDT, a strong thunderstorm was located over Pathfork, or 7
miles southwest of Harlan, moving east at 25 mph.

Winds in excess of 40 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Bobs Creek, Hensley Store, Mary Alice, Smith, Liggett, Cranks,
Martins Fork Lake, Pathfork, Three Point, Kentenia, Grays Knob,
Peepace Store, Lenarve, Martins Fork and Crummies.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3672 8349 3673 8350 3679 8349 3683 8310
      3680 8310 3678 8313 3676 8313 3674 8314
      3674 8320 3670 8335
TIME...MOT...LOC 0605Z 276DEG 20KT 3675 8341

JMW

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 1:19 AM EDTSpecial Weather StatementJKLBell26 min
May 4, 5:01 AM EDTSpecial Weather StatementJKLWayne29 min
May 4, 6:59 AM EDTAreal Flood AdvisoryJKLMcCreary, Whitley3 hr
May 4, 7:27 AM EDTFlash Flood WarningJKLMcCreary5 hr
May 4, 7:51 AM EDTAreal Flood AdvisoryJKLMcCreary, Pulaski, Wayne, Whitley5 hr
May 4, 8:34 AM EDTFlash Flood WarningJKLWayne3 hr
May 4, 9:04 AM EDTFlash Flood WarningJKLMcCreary, Pulaski, Wayne3 hr
May 4, 10:49 AM EDTAreal Flood AdvisoryJKLKnox, Laurel, Pulaski, Rockcastle, Whitley3 hr

Nearby

Special Weather Statements in Kentucky, 2021Every special weather statement in 2021

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.