671
FXUS61 KCTP 090822
AFDCTP

Area Forecast Discussion
National Weather Service State College PA
422 AM EDT Sun Jun 9 2024

.SYNOPSIS...
Persistent northwest flow aloft with a few embedded upper level
troughs will keep it cooler and generally breezy with
comfortable humidity over the weekend. After a couple chances
for showers on Sunday (one during the morning and the second
occurring mainly over the northern mountains), expect a
reinforcing shot of cool air Monday preceding a warming trend
toward the middle and end of next week.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Surface and satellite observations along with model consensus
continues to indicate a steady increase in a dual layer of
clouds tonight and the next period of showers late tonight into
early Sunday morning as another shortwave trough and cold front
moves through the region.

The showers will be most numerous across the NW part of the
state, where they are progged to begin around midnight. Rain
showers will then move eastward through central PA between
midnight and 8 AM Sunday, gradually diminishing in coverage
across the Middle and Lower Susq Valley. Most locations will see
less than 0.10 inch of rain, with the majority of the measurable
precip falling prior to 8 AM. A few showers will linger into the
mid-morning hours across the Lower Susq.

Skies will be on a clearing trend from mid morning into the
afternoon Sunday, making for another pleasant early June day.
There could be some isolated to scattered showers or thundershowers
in the northern tier during the afternoon and evening (PoPs
less than 40 pct), otherwise the afternoon looks dry with
continued breezy conditions and relative cool temps for this
time of year with highs ranging from the mid 60s in the north to
near 80 in the southern tier.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/...
Monday should be the coolest day of the upcoming 7 days. The
approach of a potent shortwave and surface cold front dropping
SE from the Great Lakes will bring more clouds than sun, along
with some afternoon and evening showers across primarily the
Central and NW 2/3 of the state.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
Upper level troughiness over the northeastern United States
will keep temperatures below normal through Wednesday. After
that, we should see a moderating trend through the mid to late
week with 90s possible in the Lower Susquehanna Valley.

Mainly dry conditions from Tuesday through Thursday as a lack of
moisture will leave central PA in a position where showers will
struggle to develop despite the upper level low and progressive
troughing pattern. There could be some showers and t-storms by
late week, as cold fronts drop southeastward across the area by
Friday afternoon. Low level moisture appears to still be limited
at this point. However, past experience is that such a pattern
provides the potential for isolated strong storms if moisture
gets advected into the area. Given the variance in guidance
that far out moisture trends will need to be monitored as the
week progresses.

&&

.AVIATION /08Z SUNDAY THROUGH THURSDAY/...
Thickening clouds and lowering ceilings will continue to
overspread central PA early this morning, ahead of an
approaching cold front. Rain showers will be most numerous
across northern PA with areas southeast seeing some approach by
daybreak.

Expect a period of LLWS over the western highlands and central
mtns overnight as a 35-40kt southwesterly jet passes overhead,
and this is noted in the TAFs.

Additionally, there is a good chance (~70%) that ceilings over
the western highlands (BFD, JST) will flirt with IFR conds by
daybreak or shortly thereafter. Farther to the east, the central
mtns (AOO, UNV, IPT) could see a period of MVFR cigs, while the
Lower Susq Valley (MDT, LNS) should remain predominantly VFR
through the TAF period.

Clouds will gradually dissipate on Sunday, as the cold front
slips to our southeast and drier air works back into central PA.
We should see VFR conds areawide by Sunday afternoon.

Outlook...

Mon...Spotty showers and MVFR cigs poss, mainly north.

Tue-Thu...Predominantly VFR w/ no sig wx expected.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

SYNOPSIS...Lambert/Colbert
NEAR TERM...Gartner/Colbert
SHORT TERM...Gartner/Colbert
LONG TERM...Lambert/Bowen
AVIATION...Guseman/Evanego