Severe Thunderstorm Warning 101, NWS Jackson, KY

AREA FORECAST DISCUSSION
National Weather Service Jackson KY
1136 AM EDT Fri Jun 17 2022

.UPDATE...
Issued at 1136 AM EDT FRI JUN 17 2022

Still watching the cluster of storms currently tracking over
central Kentucky this morning as it approaches eastern Kentucky's
door step. There have been multiple storm reports, largely wind,
and multiple measured gusts above 50 mph associated with this
system further upstream. There hasn't been a lot of confidence up
to this point in how this system evolves going forward though,
with a fair amount of disagreement within CAMs. Recently,
convection has not looked as robust as it was earlier in the
morning, but there has some reintensification along the northern
edge closer to the Ohio River. This makes sense given that this
region is encompassed by an area of higher CAPE and marginally
better shear. This might also give a bit more credibility to the
12z NAM3km solution that kept much of the better activity towards
the central and northern portions of the system as it moves over
our area this afternoon. Still anticipate the primary threat to
be damaging wind gusts.

UPDATE Issued at 735 AM EDT FRI JUN 17 2022

The current forecast is on track with storms still gaining steam
to the northwest. Have touched up the grids per the latest CAMs
consensus PoPs and also to include the current obs and trends for
the T/Td/Sky grids. These grids have been sent to the NDFD and web
servers.

&&

.SHORT TERM...(Today through Saturday)
Issued at 530 AM EDT FRI JUN 17 2022

08Z sfc analysis shows high pressure to the south of Kentucky with
an area of low pressure developing to the northwest. The nearby
high has been enough to keep most of the clouds and convection at
bay through the night for eastern Kentucky - watching as earlier
strong to severe storms passed by well to the east - but a few
isolated ones did just recently drift through the far southeast
parts of the state. Similar to the past few nights, muggy
conditions prevailed with just a hint of a ridge to valley
temperature split and river valley fog. Amid light winds,
temperatures are mostly in the mid 70s - slightly higher on the
hills and lower in the sheltered valleys. Dewpoints, meanwhile,
remain elevated in the low 70s.

The models remain in excellent agreement aloft through the
short term portion of the forecast with less agreement in the
mesoscale realm today. They all depict a stout ridge -
responsible for the oppressive heat of the past several days -
retrograding southwest and out of the area. This happens in the
face of a deepening trough diving southeast from central Canada to
New England and the Mid-Atlantic States tonight into Saturday. As
a result, significant height falls work into the JKL CWA today
and tonight with limited shortwave energy. Given the small model
spread aloft favored the blended NBM as the started point for the
grids along with the inclusion of the CAMs consensus for PoPs
today.

Sensible weather will feature one more very warm and humid day
before a much nicer air mass moves into the state. This will
happen fairly quickly as a cold front slips through the area this
evening from the north. Ahead of this, though, a cluster of
storms - in the formation stage over Illinois currently - is
expected to take aim on Kentucky and progress bodily into the JKL
CWA later this morning and into the afternoon. The HRRR is fairly
insistent that this cluster holds together well enough and
develops a cold pool as it moves through. This heightens the
concern for the potential of strong to severe storms at the
leading edge of this cluster. In fact, the HRRR continues to show
some 50+ kt wind gusts moving through the area with these storms.
However, the NAMNest would have this storm cluster fade out much
quicker as it falls apart over the JKL CWA later this morning and
into the afternoon. Forecast soundings from the NAMNest do show
plenty of instability available ahead of the storms with also
fairly high DCAPE in place - the fuel for stronger wind gusts.
Accordingly, have gone with a scenario that allows for the
possibility of stronger storms and will continue to highlight this
in social media and a partner email - in line with the marginal
threat of severe weather outlined by SPC for the area. The storms
move out quickly this afternoon with much drier weather to follow.
A mostly dry cold front will then slip through the area this
evening. A fresh, new air mass follows for Kentucky tonight with
refreshing lows in the upper 50s to low 60s most places amid
clearing skies. Saturday will then be a near perfect day of highs
only in the 70s, for most, and much lower humidity complete with
cool northerly breezes.

The main adjustments to the NBM starting point were centered on
the storm potential and timing today - favoring the CONShort. Did
also tamp down highs a bit today owing to the convection
anticipated to be more prevalent than the NBM's version.

.LONG TERM...(Saturday night through Thursday)
Issued at 520 AM EDT FRI JUN 17 2022

The long term will start out with an amplified upper level pattern
across the CONUS and Canada. A trough will sit across the eastern
portion of Canada and the Northeast US and another across the west
coast of Canada and the US. In between the pair of troughs and large
ridge of high pressure will be centered over the Mid Mississippi
Valley and will extend northward into central Canada. At the surface,
an area of high pressure will be centered over the upper Great
Lakes. A breif period of more bearable temperatures will be
supported by northerly flow from the high pressure to the northwest
of the area. Highs Sunday will actually be a degree or two below
normal, topping out in the upper 70s to low 80s, a refreshing break
before temperatures skyrocket by the middle of the next work week.
Saturday night lows will fall into the low 50s with some of the
deeper valleys touching the upper 40s. Sunday night will be a bit
milder with lows in the upper 50s.

The pattern shifts to the east and will put eastern Kentucky more
squarely under the ridge of high pressure. The surface high shifts
to the southeast toward the Mid Atlantic and broadens across the
Ohio Valley and Southeast. This will push highs into the 90s for
several days next week, though dew points will be much lower which
will help keep heat indices at a more bearable level. Dew points
will stay in the low to upper 60s during the warmest days and will
produce heat indices in the mid to upper 90s whereas the previous
heat wave saw dew points in the mid to upper 70s and heat indices
well above 100. Global models show good agreement through the middle
of the week before having issues toward the weekend as the ridge
breaks down and precipitation chances become possible. Have taken
PoPs down below 15 where the NBM tried to throw in a slight chance
for thunderstorms Tuesday. The best chance for precip will be
Wednesday night and Thursday afternoon/evening as a cold front
approaches the area. Have decided to keep only slight chance PoPs
given the model spread and the longer lead time.

&&

.AVIATION...(For the 12Z TAFS through 12Z Saturday morning)
ISSUED AT 745 AM EDT FRI JUN 17 2022

Although VFR conditions are expected to prevail through much of
the period there will be a significant exception. This aviation
concern will be the potential for thunderstorms with gusty winds
of at least 30 to 40 kts for time - mainly during the 16 to 20Z
window. Any location impacted by a storm could experience brief
MVFR or even IFR conditions from the strongest cells. Winds will
becoming southwest to west at near 10 kts after 13Z, before
becoming more northwesterly toward 18Z and after - diminishing to
around 5 kts late.

&&

.JKL WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

UPDATE...HAS
SHORT TERM...GREIF
LONG TERM...BATZ
AVIATION...GREIF

Hazardous Weather Outlook
National Weather Service Jackson KY
1030 AM EDT Fri Jun 17 2022

KYZ044-050>052-058>060-068-069-079-080-083>088-104-106>120-181730-
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
1030 AM EDT Fri Jun 17 2022

...SEVERE THUNDERSTORM WATCH 383 IN EFFECT UNTIL 3 PM EDT THIS
AFTERNOON...

This hazardous weather outlook is for portions of eastern Kentucky.

.DAY ONE...Today and Tonight.

Scattered thunderstorms are expected today ahead of a cold front.
Some of the storms could be strong to severe with damaging winds
as the primary threat.

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

Another heat wave appears increasingly likely starting Tuesday
and continuing for the remainder of next week. Record high
temperatures may be broken during that period, but lower humidity
levels should keep heat indices from peaking above 100.

Thunderstorms will be possible Wednesday night and again Thursday
afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report thunderstorm wind damage today.

GEERTSON/HAS

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>