Somerset, Kentucky 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

057
FXUS63 KJKL 280426
AFDJKL

AREA FORECAST DISCUSSION
National Weather Service Jackson KY
1226 AM EDT Sun Jun 28 2026

.KEY MESSAGES...

- Showers and thunderstorms will be prevalent through early
  Sunday, followed by much lower probabilities during most of the
  work week. Heavy rain may lead to flash flooding.

- Heat and humidity will become oppressive during the new week.

&&

.UPDATE...
Issued at 1226 AM EDT SUN JUN 28 2026

The previously mentioned area of showers and thunderstorms has
passed progressively over the forecast area while also weakening.
The progressive nature of the rainfall as well as the more
southerly placement of the heavier elements (compared to earlier
yesterday) has limited any additional hydro issues thus far.
CAM guidance still favors a corridor of NW-SE training convection
setting up over the next couple of hours from the Louisville, KY
vicinity through the Lake Cumberland area and into northeast
Tennessee. Those with interests vulnerable to flooding in the Lake
Cumberland area are encouraged to monitor for potential flood
products overnight.

UPDATE Issued at 900 PM EDT SAT JUN 27 2026

The next area of showers and thunderstorms, associated with an
MCV, is approaching from Central Kentucky. The primary concern
with this activity will be the threat for flash flooding from
training thunderstorms, especially in the Moderate Risk ERO (Level
3 of 4) area near Lake Cumberland, as the atmospheric profile
remains primed for intense rainfall rates. With time the
convection may tend to sink into Tennessee but the temporal
details are uncertain due to CAM discrepancies. Of additional
concern will be the low end threat for isolated severe
thunderstorms, primarily in the Lake Cumberland vicinity where
convection is most favored to be surface-based with the greatest
instability. The main severe hazard would be strong to damaging
wind gusts; however, a brief isolated spinup tornado is not
completely outside the realm of possibility near Lake Cumberland.

&&

.SHORT TERM...(This evening through Sunday night)
Issued at 615 PM EDT SAT JUN 27 2026

Convection which caused so much trouble during the day is long
gone and we are in a lull. However, the synoptic setup is still
similar to last night. There is modest zonal flow aloft with minor
ripples in it. We have a very moist air mass in place with PWs
near 2" and no meaningful cap. Although features are weak, that`s
all it`s taking to get convection going. However, weak features
which are somewhat mesoscale in nature are difficult for models to
handle. The end result is that there are models generating
training convection with heavy rainfall again tonight, but
without consistency for when/where. The general consensus is the
the part of the JKL forecast area most at risk is in the south.
That being the case, the Flood Watch is still set to expire this
evening in the north, but runs through the night in the south.
Depending on the model, there is some potential for heavy rainfall
to run into Sunday morning. Trends will need to be monitored to
see if another watch extension might be needed for some counties.

By Sunday morning upper level ridging will be building over the
Mississippi Valley and ending convection upstream. This ridging
builds east during the day and any lingering precip will taper off
in our area during the day and into the evening. Dry weather then
lasts through the rest of Sunday night, with the very strong upper
high anchored over KY by dawn on Monday.

.LONG TERM...(Monday through Saturday)
Issued at 353 PM EDT SAT JUN 27 2026

The extended period opens Monday morning with the area transitioning
from a fairly active pattern, into a quiet yet hot one through next
week. Analyzing modeled 500-mb heights, high pressure is positioned
over the Tennessee Valley, with the ridge axis extending further
north, through the Upper Great Lakes and into Southern Ontario.
Farther upstream to the west, a large scale trough positioned over
the Great Basin, features upper level disturbance over the Northern
Rockies.

Across Eastern Kentucky, isolated to scattered storm activity may
last through Monday afternoon, as a stationary front just north of
the forecast area, retrogrades back west as a cold front from being
on the lee side of the ridge axis. These generally remain under a
25% of occurrence, located in the Upper Cumberland or southern
portions of the Kentucky River Basins. With high pressure near or
over Kentucky, storm chances remain very isolated Tuesday and
Wednesday. Scattered storm chances return towards the end of the
week (Thursday and beyond), with a shortwave modeled to eject out of
the western trough towards the Ohio Valley. The result will be the
ridge flattening, leaving Eastern Kentucky more susceptible to
additional storm activity. The return of active weather looks
plausible heading into the nations 250th anniversary of independence.

With abundant clearing, light winds, and little forcing across the
area, patchy areas of river valley fog is expected to develop Monday
evening.

Temperatures will generally warm into the low to mid 90s during the
afternoons and cool into the upper 60s to lower 70s at night through
the extended period. Models depict dewpoints remaining elevated in
the upper 60s to mid 70s next week, leading to hot and muggy
conditions. Heat indices of 100-105F remain possible Monday trough
Friday next week.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
ISSUED AT 753 PM EDT SAT JUN 27 2026

While VFR conditions are ongoing at the start of the TAF period, a
large cluster of showers and thunderstorms is approaching from
Central Kentucky and expected to bring MVFR or worse conditions
through much of the overnight, especially at terminals south of
the Mountain Parkway. Gradual improvement in the conditions are
expected during the day on Sunday, though shower and thunderstorm
chances will linger, especially closer to the KY/TN border and
KY/VA border.

&&

.JKL WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 8 AM EDT this morning for KYZ058-068-069-079-
080-083>088-107>120.

&&

$$

UPDATE...GEERTSON
SHORT TERM...HAL
LONG TERM...GINNICK
AVIATION...GEERTSON