Somerset, Kentucky 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

411
FXUS63 KJKL 300043
AFDJKL

AREA FORECAST DISCUSSION
National Weather Service Jackson KY
843 PM EDT Wed Apr 29 2026

.KEY MESSAGES...

- Cool and mainly dry weather will prevail through the weekend,
  with frost possible around dawn on Sunday.

- The next area wide potential for showers and thunderstorms will
  be Monday through Wednesday.

&&

.UPDATE...
Issued at 843 PM EDT WED APR 29 2026

Skies have largely cleared for the time being and winds have died
off, allowing temperatures to fall a bit faster than was forecast.
Adjustments have been made for these near term trends. An increase
in largely mid level clouds is expected during the night.

UPDATE Issued at 507 PM EDT WED APR 29 2026

Have blended latest observed sky and precip info into the forecast,
raising the POP significantly for a very short time near the VA
border as showers associated with the cold front move through.

&&

.SHORT TERM...(This evening through Thursday night)
Issued at 225 PM EDT WED APR 29 2026

The latest surface analysis depicts a surface low pressure center
migrating into Ohio with a trailing cold front. Showers associated
with the low are traversing the northeastern portions of the CWA. To
the west, a convective line of showers with embedded thunderstorms,
associated with the cold frontal boundary, is progressing across
central Kentucky and is expected to arrive within the next couple of
hours. Temperatures remain suppressed across the region as
widespread stratiform cloud cover has inhibited diabatic heating.

Through the remainder of the day, a localized break in precipitation
behind the initial line of showers may allow for clearing skies. Two
distinct scenarios could drive the forecast through this evening.
The first and most probable scenario is that cloud cover remains
intact, maintaining thermodynamic stability behind the morning
activity. In this case, the cold front will swing through the area
this afternoon and evening with minimal impact, aside from a line of
showers and garden-variety thunderstorms. The second scenario
involves significant cloud thinning and insolation. Should this
occur, the potential for strong to severe thunderstorms would
increase, as the environment remains favorable for damaging wind
gusts and isolated large hail. As noted, the more stable scenario is
favored for this afternoon. Later tonight, the cold front will clear
the area as surface high pressure begins to build into the region.

Thursday will feature dry conditions under the influence of the
building high pressure regime. Temperatures will trend several
degrees below climatological averages, with highs expected in the
low to mid 60s. While the region remains dry initially, a surface
low is forecast to develop Thursday night as a shortwave
perturbation rounds the base of a nearly stationary longwave trough
situated over the Great Lakes. As this feature dives southeast, the
resulting surface wave will track across the Ohio Valley, dragging a
secondary cold front across the area and increasing PoPs through the
end of the period.

In summary, the forecast period remains characterized by a
conditional threat for severe weather, though confidence in
convective initiation remains low. The primary frontal boundary
passes tonight, ushering in a brief period of high pressure for
Thursday before a secondary cold front arrives early Friday
morning.

.LONG TERM...(Friday through Wednesday)
Issued at 244 PM EDT WED APR 29 2026

The start of this period will be characterized by troughing over
the Great Lakes region, with ridging farther south over Mexico.
This weekend into early next week, an upper-level low will track
inward from the Pacific, eventually breaking down the southern
ridge; this will give way to broad troughing over the entire
eastern CONUS until nearly the end of the period. This pattern
will enable multiple impulses to influence our weather; the first
impactful shortwave will support a surface cyclone as it
translates into the Ohio Valley on Friday. A weak and poorly
defined cold front associated with this cyclone will deliver a
glancing blow to the northern portion of the forecast area as this
system passes, although it appears that the majority of
precipitation will stay north of our forecast area at this time.
Farther south, another surface low will be translating across the
southeastern US, with the NBM introducing PoPs to the southeastern
portion of our CWA on Saturday. Compared to yesterday, the track
of this low has trended farther south, and the latest runs of both
the ECMWF and GFS keep this low closer to the Gulf Coast before
it moves into the Atlantic. This track would favor rain narrowly
missing southeastern Kentucky; however, trends will need to be
monitored. Given the uncertainty with the track of this low, I
have opted to keep NBM PoPs for now, but with recent model runs
backing away from a wetter solution, confidence in rain on
Saturday is currently low.

Irrespective of rain, the main story looking into early May will
be below-average temperatures and the return of frost chances. On
Friday night, temperatures may fall into the 30s in some portions
of our area. Overnight cloud cover will be a key factor in
determining how cold it gets on Saturday morning; this itself will
largely depend on the track and timing of the aforementioned
southern and northern systems. As of now, the NBM keeps extensive
cloud cover in our area overnight, a solution that is supported by
indications that moisture will likely linger in our area
overnight; however, should the front clear our area quickly and
the southward trend of the southeastern US low continue, it is
possible that skies clear out enough to allow temperatures to fall
a few degrees cooler than the current forecast. Regardless, high
pressure will begin to build behind this activity on Saturday.
With northerly winds dominating following the frontal passage,
this looks to be the coldest day of the period. Overnight,
clearing skies and diminishing winds will create ideal conditions
for decoupling, which will allow temperatures to plummet in
valleys. Additionally, MOS guidance continues to show a signal
that temperatures in some sheltered valley locations may fall to
near freezing overnight. Thus, frost risk will be high on Saturday
night/Sunday morning, with another day of unseasonably cool
weather expected on Sunday.

Looking ahead, the next chance for rain in eastern Kentucky seems
to be on Monday. The details of next weeks upper-level pattern
remain highly dependent on how the Pacific low interacts with
eastern CONUS troughing; however, it is likely that multiple
impulses associated with this troughing will allow for periods of
precipitation early next week. At the surface, high pressure will
exit our area on Monday, with another low pressure system tracking
over the Great Lakes/Southern Canada region. Ahead of this low,
southwesterly winds will keep temperatures a little warmer for
Monday, with modest moisture return expected. Beyond this general
pattern, there is limited agreement regarding the positioning and
timing of these features next week, so confidence in specific rain
chances on any given day remains low, but an unsettled pattern
will be favored through the end of the period.

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
ISSUED AT 725 PM EDT WED APR 29 2026

Some MVFR ceilings lingered near the Virginia border at TAF
issuance, but should break up this evening. Otherwise, VFR
conditions are expected through the period. There will probably be
some mid level ceilings of 15-20K ft AGL for a time overnight.

&&

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

&&

$$

UPDATE...HAL
SHORT TERM...VORST
LONG TERM...FAGAN/VORST
AVIATION...HAL