Somerset, Kentucky 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

863
FXUS63 KJKL 290600 AAA
AFDJKL

AREA FORECAST DISCUSSION...UPDATED
National Weather Service Jackson KY
200 AM EDT Wed Apr 29 2026

.KEY MESSAGES...

- A more active weather pattern is now upon us, with multiple
  chances for widespread showers and storms through this evening.

- This convection will bring some more highly beneficial rainfall
  to the region.

- Once the frontal boundary finally clears the area late this
  week, cooler than normal temperatures are favored along with a
  chance for frost over the weekend.

&&

.UPDATE...
Issued at 130 AM EDT WED APR 29 2026

Retooled the PoP and thunder grids per the current radar and CAMs
guidance through dawn as the more robust showers/storms are
lifting northeast and out of the area while more stratiform rain
is developing and moving north from the Cumberland Valley. Will
have to watch this later batch for strengthening and training for
possible minor high water issues. With this updated did also
include the latest obs and trends for the T/Td grids. All these
adjustments have been sent to the NDFD and web servers along with
a freshening of the SAFs and zones.

UPDATE Issued at 1145 PM EDT TUE APR 28 2026

The forecast largely remains on track as showers and storms are
moving into the forecast area from the southwest. Updated the
diurnal curve with the latest observational data.

UPDATE Issued at 746 PM EDT TUE APR 28 2026

The forecast was updated with the latest observational data. Also
updated the weather grids to introduce verbiage for Severe
Thunderstorm Watch 176 in the Southwest counties. Otherwise the
forecast remains on track.

&&

.SHORT TERM...(This evening through Wednesday night)
Issued at 337 PM EDT TUE APR 28 2026

Synoptically, not much has changed in the overall pattern.
Yesterdays surface low has moved from the Mid-Mississippi Valley
into the northern Great Lakes. The associated cold front extends
south through the Ohio Valley and remains west of the CWA,
terminating near a weak surface perturbation. To the east, surface
high pressure remains firmly entrenched along the Atlantic Seaboard.
Locally, the area is sandwiched between the approaching cold front
and the offshore high. Widespread cloud cover has limited diurnally
driven warming, keeping high temperatures in the low to mid-70s.

Through the remainder of the afternoon, the front will continue its
slow approach, bringing increasing chances for showers and
thunderstorms. However, persistent cloud cover has hampered
insolation and subsequent destabilization, thereby minimizing the
risk of severe weather. Nonetheless, the combination of frontal
forcing, the approaching surface perturbation, and an intensifying
nocturnal LLJ could trigger a few stronger storms overnight as a
weak boundary lifts through the region. Showers and isolated to
scattered thunderstorms will remain possible through the early
morning hours on Wednesday.

Wednesday will feature similar meteorological threats. As the
surface low tracks northeast into Ohio, the cold front is progged to
cross the area during the afternoon. The threat of strong to severe
convection remains conditional, dependent entirely on the degree of
atmospheric recovery and clearing behind the morning rain. HiRes
CAMs suggest that the timing of peak instability and frontal forcing
may not align, keeping the severe threat marginal. The region will
finally see a respite from convective activity beginning Wednesday
night as post-frontal high pressure builds into the area. Lows
Wednesday night are forecast to fall into the mid-40s, with slightly
cooler values expected in areas that experience rapid clearing.

Overall, the period is defined by daily chances for precipitation.
Due to widespread cloud cover and limited SBCAPE, storm severity
will be isolated. The arrival of post-frontal high pressure on
Wednesday night will usher in a period of below-average temperatures.

.LONG TERM...(Thursday through Tuesday)
Issued at 406 PM EDT TUE APR 28 2026

The long term period will be generally characterized by
persistent upper level troughing over the northeastern CONUS.
Further south, ridging will gradually break down over the south
central US into Mexico as a potent upper level low moves into the
southwestern US this weekend. For eastern Kentucky, this synoptic
pattern indicates high confidence in below average temperatures
through at least Saturday. Precipitation associated with
Wednesdays cold front will exit our area by Thursday afternoon,
giving way to clearing skies in the afternoon; however, given
northwesterly postfrontal winds, highs will still remain ~10
degrees below normal. Overnight, temperatures may approach the
upper 30s in the northernmost part of the forecast area; however,
the wild card in this forecast is overnight cloud cover,
particularly as a secondary cold front will sag south into
Kentucky on Friday. Thus, cloud cover will likely be too thick to
allow for full decoupling, keeping lows in the low to mid 40s
across most of the forecast area.

On Friday, a broad surface low initially located over the Central
Mississippi Valley will translate generally east across the
southeastern US. The exact track of this low remains uncertain,
but there is broad model agreement that this will allow for a weak
cold front to drop into our area, bringing a slight chance for
showers. Any precipitation that does fall is expected to be light,
and the exact timing of this remains uncertain at this time;
therefore, confidence is low enough that I have opted to keep NBM
PoPs for now. Regardless of precipitation, the primary impact of
this secondary front will be another reinforcing shot of cold air,
which will allow temperatures to fall into the 30s and low 40s
overnight. Given lingering moisture, cloud cover could prevent our
valleys from getting too cold; however, in the event of a quicker
frontal passage or weaker front, drier conditions could set in.
In this scenario, skies could clear out overnight, which would
allow for cooler low temperatures and therefore increase the risk
for patchy frost in sheltered valleys. Thus, these cloud cover
trends bear monitoring, and agricultural interests are advised to
remain aware of forecast changes.

Saturday will be our coolest day of the forecast period. With the
secondary cold front through our area, northwesterly flow will
dominate, keeping high temperatures below average in eastern
Kentucky yet again. Over the course of the day, building high
pressure will also allow for skies to clear out gradually
throughout the day. These clear skies and light winds will allow
overnight temperatures to plummet in our valleys, with 12Z MOS
guidance even showing subfreezing lows for some sheltered areas.
Given these conditions, frost formation will be most likely on
Saturday night into Sunday morning. Looking ahead, high pressure
will continue to dominate through Sunday until the next system
will approach our area around the start of next week, although
details remain unclear at this time. Regardless, below average
temperatures will remain favored through at least the first week
of May per CPC outlooks.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
ISSUED AT 200 AM EDT WED APR 29 2026

Temporary VFR conditions are prevailing across all TAF sites at
06Z issuance time. Shower and storm chances will then increase
for the entire forecast area; especially after 08Z and then
diminish again, at most TAF sites, toward 18Z. Sites will likely
fall to categorical MVFR and IFR before gradually improving back
to MVFR and VFR after 18Z. Winds will be light and variable
through mid morning - with higher gusts near any storms. Look for
winds to then pick up during the afternoon as they shift from the
southwest to northwest with some gusts up to 20 kts possible.

&&

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

&&

$$

UPDATE...GREIF
SHORT TERM...VORST
LONG TERM...FAGAN/VORST
AVIATION...GINNICK/GREIF