North Huntingdon, Pennsylvania 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

031
FXUS61 KPBZ 221809
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
109 PM EST Mon Dec 22 2025

.SYNOPSIS...
A period of snow or wintry mix falls across portions of
northwest Pennsylvania early Tuesday morning. The remainder of
the region sees rain with temperatures slowly rising through
the day. Unseasonably warm conditions and rain chances linger
through the week into the weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
KEY MESSAGES:

- Seasonable temperature amid increasing cloud cover
- Low probability for rain/snow during the afternoon
- Rain chances increase overnight, snow/wintry mix north of
  I-80
-----------------------------------------------------------

SFC high pressure flees eastward today towards the Eastern
Seaboard. Sunny skies prevail early, before a developing upper
shortwave spurs increasing cloud coverage this afternoon and
evening. Weak SFC WAA likely pushes high temperatures across the
region back towards normal values. Ample dry air at and just
off the SFC likely maintain a dry forecast but POPs do increase
this afternoon in warm/moist advection. Not much is expected out
of this activity with many areas remaining dry and only a few
seeing light drizzle or snow.

POPs decrease again this evening but then ramp up closer to 06z
with weak jet ascent combined with a lifting warm front. Much
of the area likely sees rain out of this, but areas north of 422
can likely start out as snow before a turnover to rain. North
of I-80 a couple of hours of freezing rain remain possible in
850mb warm advection over a SFC layer below freezing. This
window is small and likely near/just before sunrise. A light
southerly wind overnight and possible WAA combining with the
self destructive warming process of freezing rain doesn`t lend
itself to much accumulation. A glaze to a few hundredths looks
possible in far northern Venango, Forest and Jefferson Counties
and could lead to icy spots and travel impacts for the morning
commute.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
KEY MESSAGES:

- Cloudy and drizzly on Tuesday with moderating temperatures
- Dry and cloudy Wednesday with slightly cooler, but above normal
  temperatures
----------------------------------------------------------------

Any lingering freezing drizzle threat will quickly wrap up after
sunrise as temperatures rise with continued warm advection in
southwesterly flow. The depth of the moisture will cut off through
the morning as well, though beneath a strong low level warm
advection driven inversion, a well-saturated layer is likely to
persist through the daytime hours ahead of a late afternoon
cold front passage. While forcing will generally be weak at
best, expect that most of the day will be characterized by a
blanket of low cloud cover and spitting drizzle, especially in
the ridges where upslope flow can add to the weak forcing. Wind
will be a bit more present as well around 10 mph; stronger flow
aloft will struggle to mix down in the saturated environment.
Even with lack of sun, warm advection will bump highs into the
low to mid 40s north of Pittsburgh and upper 40s to near 50
south.

Dry conditions return areawide Tuesday night as drier air works in
in the wake of a weak cold front passage and building high pressure
across the Great Lakes. Wednesday will still feature a good bit of
mid-level jet induced upper level cloud coverage with and slightly
cooler temperatures owing to veering northwest flow in the wake of
the FROPA. Lows on Christmas Eve are likely to be above normal under
the increased cloud coverage and light southerly flow.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
KEY MESSAGES:

- Showers on Christmas Day morning with above normal temperatures
- More widespread precip on Friday with increasing forecast
  uncertainty thereafter
-------------------------------------------------------------------

We remain in a deep layer northwest flow setup for Christmas Day as
the first in a series of weak wave slides through the Ohio Valley.
Its surface reflection will be cyclogenesis across IL/IN with the
low quickly diving through our area in the morning hours. How far
north the warm front can reach, and thus how warm area locales get
on Christmas, is still in question as ensembles attempt to resolve
subtle differences in the mid-level height field. An
optimistically warmer solution with a farther north warm front
suggests low 50s reaching as far north as Pittsburgh while a
colder solution sits in the low to mid 40s. Precip-wise, most
will see rain save along I-80 where, if precip occurs
(contingent on warm front placement and available moisture), it
may fall as a mix of rain and snow. Amounts will be light for
most with the fast moving nature, though south of I-70 where
rain is highest confidence, there is a ~40% chance of >0.25".

Ensembles then suggest another, slightly deeper, wave following the
same track on Friday and another surface low traversing the region.
A longer period of north to northwest flow ahead of the low may
allow for colder air to be more strongly entrenched ahead of it and
open the door for more wintry precip types. This will be highly
dependent on the track of the surface low which is uncertain owing
to shortwave amplitude and timing. NBM MaxT for Friday shows a sharp
contour in spread basically from Pittsburgh south and west; what`s
higher confidence at this point is that 1) areawide precip is likely
and 2) locales in SE OH should be safely in the warm sector and see
the upper 50s to even low 60s. Farther north, uncertainty really
becomes evident with a 15-20 degree spread in highs ranging from 30s
on the cold side to upper 50s on the warm side. The latest NBM
has taken a colder turn, but with so much uncertainty being fed
in, expect that bouncing back and forth until steadier solutions
are reached.

A series of continuing shortwaves will provide periodic
precipitation chances into the weekend as ensembles resolve toward
more zonal flow, but much uncertainty arises aside from that and
near to above normal temperatures.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
KEY MESSAGES:

- VFR conditions and light winds tonight through 00Z Tuesday
- Restrictions return after 06Z Tuesday with passing low
  pressure; wintry mix (along/north of I-80) and rain expected
------------------------------------------------------------

High confidence VFR continues through much of the TAF period.
A swath of mid and high clouds has begun filtering through the
region from the Northwest. Weak warm/moist advection is
producing radar returns across Ohio at this time but this is
largely expected to be virga as it swings across the region this
afternoon.

An approaching warm front spurs another shot for precipitation
largely beginning around 04z across the region. With plenty of
dry air in place at the SFC, don`t expect much precip making it
to the ground or lowering of CIGs before about 08z. Precip can
begin as snow and feature a wintry mix for FKL/DUJ. Other ports
begin as Prob30 groups of RASN, where snow is less likely and a
quick turnover or all rain is expected. CIGs and VIS finally
start to lower closer to sunrise as top down moistening occurs.
By 12z MVFR restrictions become increasingly likely as clouds
lower in a light rain/drizzle/mist.

Between about 04-14z a 40kt 850mb jet will slide across the
region. The core of this jet will be near/over MGW but WS has
been included for most ports south of FKL/DUJ.

Outlook...
VFR may return briefly during the day Wednesday before another
system brings precipitation and restriction chances back to the
region Wednesday night into Thursday.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
PA...None.
OH...None.
WV...None.

&&

$$

SYNOPSIS...AK
NEAR TERM...AK
SHORT TERM...MLB
LONG TERM...MLB
AVIATION...AK