Westerville, Ohio 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

504
FXUS61 KILN 141824
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
224 PM EDT Sat Jun 14 2025

.SYNOPSIS...
An upper level disturbance will move slowly east across the Ohio
Valley tonight through Sunday, leading to occasional showers and a
chance for thunderstorms. Temperatures will gradually warm through
mid week, but daily chances for showers and thunderstorms will
continue.

&&

.NEAR TERM /THROUGH TONIGHT/...
A frontal boundary extending from central Indiana into west central
Ohio will continue to sag very slowly southward tonight as a
weakening mid level trough axis shifts slowly east across the mid
Ohio Valley. Scattered showers and embedded thunderstorms will
continue to become more widespread through late afternoon and
continue into this evening as we destabilize a bit more. With PWs up
around 2 inches, training/slow moving storms will be capable of
producing locally heavy rainfall, leading to an increased flood/flash
flood threat. The best chance for this appears to be in the vicinity
of the frontal boundary so have therefore issued a Flood Watch into
this evening for much of the Whitewater and Miami Valleys.

As we begin to lose the diurnal component, expect to see an over
decreasing/weakening trend in coverage as we head through the
overnight. Lows tonight will range from the lower 60s northwest to
the upper 60s in the south.

&&

.SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/...
The frontal boundary will push slowly south Sunday into Sunday night
as the mid level trough axis shifts slowly east across the upper
Ohio Valley. As we slightly destabilize again through the day,
expect scattered showers and embedded thunderstorms to become more
widespread Sunday afternoon into early Sunday evening, with the
highest pops across our southeast. The pcpn should then dissipate
through Sunday night as we lose the instability and the trough axis
moves off to our east. Highs on Sunday will be in the upper 70s
to around 80 degrees with lows Sunday night in the 60s.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
Monday 12Z-? The region remains under a relatively weak flow pattern
aloft at the start of the extended period. A weak shortwave looks to
move through the larger flow Monday, providing a resurgence of deep
moisture (PWATs back to 140% of normal). At the surface, Tds remain
in the upper 60s/low 70s with daytime high temps reaching the
low/mid 80s, so we remain in "the air is soup" mode. As the
shortwave moves through, scattered showers and storms are once again
introduced into the forecast for Monday afternoon and evening,
potentially lingering into Tuesday morning. No real signal for
severe threat- very little forcing/ shear.

By mid-week, we`ll be on the cusp of a broader pattern change thanks
to a few different factors... First, to our north, a low pressure
system scooting by the Hudson Bay will drag a weak surface cold
front all the way down through the Mid-West. This will be the focus
for redevelopment/intensification of a secondary area of low
pressure that will be moving off the leeward side of the Rockies.
This secondary feature will be the next organized weather system to
the region.

Surface flow turns southerly again by Tuesday afternoon, pumping
additional moisture and warmth into the region. Overnight lows
Tuesday night only fall to the upper 60s/low 70s. Thanks to this
continued WAA, Wednesday looks to be the warmest and muggiest day of
the week. Feels like temps have been tickling Advisory criteria in
spots the last few runs, but we`re not quite there yet. As the
system to our west draws closer, we`ll be open warm sectored for a
period (likely on Wednesday) before the trailing cold front swings
through (Wednesday night? Thursday?). Given the ample warm sector
and more potent forcing/shear associated with this system, this does
open up the possibility for a severe weather threat. However, timing
will play a large role in how things evolve and we`re still a bit
far out for details.

After the system pulls off to the east, we should experience a brief
reprieve in moisture and maybe a few peeks of sunshine to end the
work week in the post frontal subsidence regime.

&&

.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
Scattered showers and isolated thunderstorms will continue to become
more widespread through this afternoon and persist into early
evening as a weak low pressure system moves across the Ohio Valley.

MVFR to low end VFR cigs will prevail into this evening. Shower
activity will diminish overnight but lingering low level moisture
will lead to widespread MVFR cigs becoming IFR later tonight into
early Sunday. Some MVFR br development will also be possible
overnight into early Sunday. Cigs will lift back into MVFR later
Sunday morning and then should trend into VFR through the afternoon.

Scattered showers and thunderstorms will again be possible as we
progress through the day on Sunday.

OUTLOOK...Several rounds of storms possible through Wednesday,
causing periods of MVFR to possibly IFR ceilings and visibilities.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Flood Watch until 10 PM EDT this evening for OHZ042>045-051>054-
     060>062-070.
KY...None.
IN...Flood Watch until 10 PM EDT this evening for INZ050-058-059-066.

&&

$$

SYNOPSIS...JGL
NEAR TERM...JGL
SHORT TERM...JGL
LONG TERM...CA
AVIATION...JGL