Somerset, Kentucky 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

357
FXUS63 KJKL 061936
AFDJKL

AREA FORECAST DISCUSSION
National Weather Service Jackson KY
236 PM EST Fri Mar 6 2026

.KEY MESSAGES...

- Temperatures will soar into the upper 70s and lower 80s on
  Friday and Saturday, threatening daily record highs. Unusually
  warm overnight lows are also expected.

- Widespread showers and scattered storms will accompany a cold
  front Saturday afternoon and evening. A few storms could become
  strong to severe, with damaging winds as the main threat.

- Unsettled, mild weather persists into next week with additional
  chances for rain and thunderstorms Monday through Wednesday.

&&

.UPDATE...
Issued at 1249 PM EST FRI MAR 6 2026

Isolated showers have developed over extreme eastern KY and an
agitated cu field extends further southwest. Have added a 20% POP
for those areas this afternoon. Based on model fcst soundings,
would not rule out some thunder.

UPDATE Issued at 1018 AM EST FRI MAR 6 2026

Have removed remaining POP in our northern counties for today and
blended into latest obs for T/Td and sky cover.

&&

.SHORT TERM...(Today through Saturday)
Issued at 336 AM EST FRI MAR 6 2026

As of the 0600Z surface analysis, the region remains under the
influence of surface high pressure centered off the eastern
seaboard. To the west, a 1000 mb surface low is situated over
eastern Colorado, with a warm front extending eastward across the
Central Plains, through the Ohio Valley and southern Great Lakes,
and into the Mid-Atlantic. Multiple mesoscale low pressure centers
are tracking along this broad zone of baroclinicity. Locally, a line
of showers is moving east-northeast across the northern third of the
CWA, while overnight temperatures have cooled into the upper 50s and
mid 60s.

Through the remainder of the early morning and throughout Friday,
the showers will lift north of the area as rising geopotential
heights aloft promote subsidence on the northwestern periphery of
the ridge. Synoptically, the region will be positioned within the
warm sector of the aforementioned frontal system. Within this air
mass, southerly flow between the offshore high and the approaching
cold front will facilitate robust warm air advection. This warm air
advection is expected to push daytime highs into the upper 70s and
lower 80s, potentially breaking records across the eastern CONUS.
Locally, record highs of 77 degrees at KJKL and 79 degrees at KLOZ
are at risk, as temperatures are forecast to reach the lower 80s at
both sites. While the local area remains quiet, the Colorado low
will track rapidly across the Central Plains toward the Upper
Midwest. Consequently, the warm front will lift through the Ohio
Valley while the trailing cold front gradually approaches from the
west. Temperatures tonight will remain mild, propped up by the warm
sector air mass, with lows in the low to mid 60s.

Beginning Saturday morning, the downward mixing of the low-level jet
will promote breezy conditions, with surface gusts of 25 to 30 mph
expected throughout the day. However, the primary forecast challenge
for Saturday remains the uncertainty surrounding organized
convection, with two distinct scenarios currently under evaluation.
In the first case, a dry morning with clearing skies would
facilitate diurnal destabilization by the afternoon. Forecast
soundings for this outcome indicate MUCAPE values near 1500 J/kg,
effective bulk shear around 35 knots, and surface dew points in the
low to mid 60s. While low-level lapse rates appear favorable,
marginal mid-level lapse rates and the northeastward displacement of
the LLJ core could decouple the strongest kinematics from the peak
thermodynamic environment, limiting the overall severe potential.

Conversely, a second scenario involving pre-frontal showers and
persistent cloud cover would significantly stabilize the boundary
layer, effectively mitigating the severe weather threat. Recent high-
resolution CAMs trend toward this more stable solution, showing
extensive cloud debris and early precipitation. The SPC mentions
this stable solution in their discussion but maintains a Slight Risk
for the northeastern Commonwealth and a Marginal Risk elsewhere,
with damaging wind gusts remaining the primary hazard. Regardless of
how the convection evolves, the cold front is expected to cross the
region Saturday, bringing widespread showers and thunderstorms
through the end of the period.

The forecast period will be characterized by an initial period of
drying and record-breaking warmth, followed by an approaching cold
front that brings the threat of strong to severe storms and
continued anomalous temperatures through Saturday afternoon.

.LONG TERM...(Sunday through Friday)
Issued at 236 PM EST FRI MAR 6 2026

A brief cool down will be underway at the start of the long-term
period as a cold front sags across southeastern Kentucky on
Sunday morning. The front`s parent 500 hPa trough will be
broadening over the Northeastern CONUS with the better forcing
shearing away to the northeast amidst an increasing quasi-zonal
flow pattern. Meanwhile, a southern stream closed low around 555
dam is noted over or just offshore the Baja California.

The aforementioned cold front will continue to sag southward, string
out east-west, and stall to our south over the Tennessee Valley and
Southern Appalachians by Sunday afternoon/evening. Weak surface
high pressure then builds along the spine of the Central and
Southern Appalachians for Sunday night as heights begin to slowly
rise. Heading into the new work week, the southern stream upper low
will begin drifting eastward toward the Gulf States while an
initially low-amplitude trough crosses the Northern Rockies and
gradually amplifies as it propagates eastward across the Northern
CONUS. The stalled front to our south dissipates and is replaced
by a new warm front consolidating north of the Ohio River amidst
increasing southerly return flow. This will send temperatures
rising back to 20 or more degrees above normal from Monday
afternoon through Wednesday.

With that renewed warmth, weak diurnally-modulated instability
and minor disturbances ejecting out of the southern stream low
could support at least weak convection at times beginning Monday
night and persisting until the arrival of a cold front in the
late Wednesday to early Thursday timeframe. Shear will also
increase with time under a strengthening subtropical jet stream.
AI and machine-learning severe convective weather probabilities
suggest the possibility of at least isolated severe weather
hazards on both Tuesday and Wednesday, though instability still
appears to be a significant mitigating factor at this time.
The eventual depth of the northern stream trough as well as any
phasing with the southern stream energy by mid-week varies
significantly in the deterministic guidance from run-to-run and
model-to-model. More phased solutions such as the 12z GDPS/ECMWF
would support the cold front being more potent, surging southeastward
through eastern Kentucky and bringing a brief surge of below
normal temperatures by Thursday. Less phased solutions such as the
00z ECMWF/12z GFS would support a comparably modest cold front
settling across our region mid-week with subsequent near normal
temperatures.

In sensible terms, look for showers to gradually diminish from
northwest to southeast on Sunday with subsequent clearing. It will
still be mild for this time of year, with Sunday`s high
temperatures ranging from the lower 60s north of I-64 to the upper
60s far southeast valleys. A partly cloudy and cool night follows
with lows ranging mainly in the 40s. Warmer temperatures then
return from Monday through Wednesday with highs in the 70s
(perhaps nearing or exceeding 80F in warmer locales). Likely rain
chances return on Tuesday (60 to 70 percent chance) with more
widespread activity (70 to 90 percent chance) probable on
Wednesday into early Thursday. Temperatures return closer to
or even below normal levels for mid-March by Thursday and Friday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
ISSUED AT 223 PM EST FRI MAR 6 2026

Very isolated showers or thunderstorms could briefly bring
sub-VFR conditions this afternoon in extreme eastern and
southeastern KY. Otherwise, generally VFR conditions are expected
through the period, with additional showers/thunderstorms likely
holding off until after 18Z on Saturday. Winds will increase out
of the southwest on Saturday, with gusts of 20-25 kts forecast in
most places by the end of the TAF period.

&&

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

&&

$$

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