Somerset, Kentucky 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

391
FXUS63 KJKL 071356
AFDJKL

AREA FORECAST DISCUSSION
National Weather Service Jackson KY
956 AM EDT Sun Jun 7 2026

.KEY MESSAGES...

- Daily chances for showers and thunderstorms this afternoon to
  far northern Kentucky, then persist across the entire area
  through the new work week.

- The greatest rain chances are on Monday, Tuesday, and Wednesday,
  and the potential for multiple rounds of locally heavy rainfall
  poses a risk for isolated flooding in this time frame.

- Hot and humid conditions escalate through the week, with
  widespread apparent temperatures in the mid to upper 90s likely
  by Thursday and Friday.

&&

.UPDATE...
Issued at 955 AM EDT Sun Jun 7 2026

Area observations were blended into the forecast grids, and the
previous forecast remains on track. A deck of mid-level clouds
remains draped across the central third of the forecast area, with
occasional light returns noted on radar. Based on nearby webcams,
this is likely virga, and rain is not forecast to reach the
ground in most of Eastern KY today. Once diurnal warming yields
highs in the 80s this afternoon, a few showers and storms may
develop north of the Mountain Parkway, with mentionable PoPs
relegated to Fleming County. Northern locales are currently
experiencing less sky cover, thus they are more likely to reach
convective temperatures in the upper 80s. Further to the south,
the sky cover is expected to mix out later this afternoon, and
temperatures should accordingly recover into the mid 80s. If the
cloud cover sticks around though, forecast highs could under-
perform there. Regardless of pop-up convective development,
significant weather impacts are not expected today. This makes
for a warm, but generally pleasant, end to the weekend.

UPDATE Issued at 710 AM EDT SUN JUN 7 2026

No substantive changes were needed with this forecast update.
Patchy mid and high clouds continue to drift across the area while
temperatures have dipped into the upper 50s, colder valleys, to
near 70F, warmest northern ridges.

&&

.SHORT TERM...(Today through Monday)
Issued at 415 AM EDT SUN JUN 7 2026

Placid weather continues across eastern Kentucky early this morning
with temperatures ranging from the lower 60s in the cooler valleys to
around 70F atop thermal belt ridges. Patchy mid and upper level
clouds continue to drift in from northwest to southeast. A glance at
the latest surface analysis shows an ~999 mb surface low over the
St. Lawrence Valley with an associated cold front extending south
along Long Island and then southwest to below the Mason-Dixon
line and then WNW to over Iowa. Looking aloft, a 500 hPa trough
axis extends from Eastern Canada to over the Chesapeake Bay while
ridging extends from the Southeast NNW across the Commonwealth
and into the Upper Midwest and Upper Great Lakes. A notable
shortwave trough (former weak upper low) is found over Kansas and
Oklahoma riding up the western side of the ridge. While PWATs are
currently in the 1.1 to 1.3 inch range over the eastern portions
of Kentucky, deep southerly flow off of the Gulf is feeding a
much juicier air mass up the Mississippi Valley along the western
side of the upper level ridge and eastern side of the shortwave
trough.

As that shortwave trough continues to lift to over the Central
Plains this afternoon, the Northeast CONUS trough will amplify,
briefly allowing the upper level ridge to take on a high amplitude
omega appearance from Kentucky northward into Ontario while the
surface cold front stalls. A bit of weak energy riding through
the ridge could help force some convection this afternoon closer
to the stalled cold front to our north and east. However, any
convection would likely be limited to areas well north of the
Mountain Parkway and in fact is overall favored to most likely
stay northeast of the JKL CWA entirely. The front will retreat
northeast tonight and Monday while the 500 hPa ridge axis shifts
eastward and slowly breaks down as the shortwave trough drifts into
the Lower Ohio Valley. PWATs surge across eastern Kentucky on
Monday ahead of this feature, rising to 1.5 inches (85th
percentile relative to climatology) in the Big Sandy Basin to 1.9
inches near Lake Cumberland (or around the 99th percentile
relative to climatology). CAMs show numerous to widespread deep
convection developing from west to east across the JKL CWA during
the day on Monday as this upper level shortwave trough approaches.
With the deep, moist, and skinny CAPE profiles will come the
threat of torrential downpours, though any substantial hydro
concerns should hold off for most if not all of the area until
after 00z Tuesday (though some concerns cannot be entirely ruled
out in the Lake Cumberland area by the evening hours).

In sensible weather terms, look for quiet weather again today outside
of an isolated shower or storm threat well north of the Mountain
Parkway. It will be warm and more humid with highs in the mid to
upper 80s. Variable cloud cover follows for tonight with lows
ranging in the 60s. Showers and storms then increase from west to
east during the day on Monday with temperatures ranging from the
lower 80s in the vicinity of Lake Cumberland to the upper 80s over
the Big Sandy River Basin.

.LONG TERM...(Monday night through Saturday)
Issued at 539 AM EDT SUN JUN 7 2026

The long term period will open with an upper level ridge over the
eastern CONUS, with a closed upper level low over the Canadian
Prairie and a relatively defined shortwave just west of the
forecast area. Farther west, a closed upper level low sits off the
coast of British Columbia, with general troughing over the
western CONUS. Although rain chances are expected to wane
overnight Monday with the loss of diurnal heating, height falls
associated with this shortwave will provide enough lift for
additional precipitation chances on Tuesday, particularly as the
upper level ridge translates east and continues to break down. A
moist air mass will already be in place, with LREF mean PWATs
generally ranging from 1.6 to 1.8 inches across most of the
forecast area by Tuesday afternoon; this represents values in at
least the 95th percentile compared to climatology. Instability
will be adequate for some thunderstorms, with LREF mean MUCAPE in
the neighborhood of 500-1000 J/kg. This instability will be driven
largely by excessive moisture (dewpoints in the upper 60s to low
70s); however, lapse rates will generally be poor, and abundant
cloud cover will limit the development of a more robust
thermodynamic environment. Also, given the absence of any upper
level features directly overhead, shear will be pitiful, with
effective shear generally remaining below 10 kts. This will keep
storms fairly weak and disorganized, and thus the main convective
hazard will be locally heavy downpours and potential isolated
instances of flash flooding, particularly in areas that receive
multiple rounds of convection. Once again, rain chances should
decrease somewhat on Tuesday night with the loss of daytime
heating.

By Wednesday, troughing over the western CONUS will progress
eastward, with upper level ridging building over the Mississippi
Valley between this western trough and the aforementioned
shortwave. At this time, there is significant model disagreement
over the exact progression of these features, including the
departure of the initial shortwave and the eastward extent of the
stronger trough to the west. Generally, there is agreement that
height falls are expected through at least early Wednesday, which
should allow for at least some rain chances in the area. Details
remain less clear after that. Some models (such as the GFS) depict
a higher amplitude ridge building more quickly, resulting in
height rises by Wednesday afternoon. This would result in lower
PoPs for the forecast area at this time. In contrast, other
solutions (such as the ECMWF) favor a slower building and lower
amplitude ridge. In this scenario, flow aloft would be closer to
zonal ahead of the trough, resulting in continued height falls and
higher PoPs throughout Wednesday. LREF 24 hour QPF suggests a
0.25 in difference between 25th and 75th percentile values across
most of our area, demonstrating this model spread. Therefore,
although NBM QPF was retained, the forecast remains generally low
confidence at this time.

Looking ahead, troughing continues to progress east towards the
end of the work week. Unfortunately, there is limited model
consensus regarding the southward extent of the trough, which
itself depends on the evolution and strength of the aforementioned
upper level ridge. Regardless, convection appears possible each
day through Saturday given the continued presence of moisture
(dewpoints remain in the upper 60s and low 70s) and the generally
favorable upper level pattern. However, confidence remains low in
the details of rain chances at any particular time.

&&

.AVIATION...(For the 12Z TAFS through 12Z Monday morning)
ISSUED AT 737 AM EDT SUN JUN 7 2026

VFR conditions will generally prevail through the TAF period.
Patchy mid- and high-level clouds will continue to stream in from
the northwest today. However, lower ceilings will develop from
the southwest late tonight and likely impact SME and LOZ toward
the end of the TAF period as moisture increases with an
approaching upper level shortwave trough. Winds will be light and
variable through the period, generally around 5 kts or less.

&&

.JKL WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

UPDATE...MARCUS
SHORT TERM...GEERTSON
LONG TERM...FAGAN
AVIATION...GEERTSON