893
FXUS61 KCTP 252250
AFDCTP

Area Forecast Discussion
National Weather Service State College PA
650 PM EDT Sun Oct 25 2026

.WHAT HAS CHANGED...
* No significant changes

&&

.KEY MESSAGES...
1) Rain-free conditions will persist through the end of October

&&

.DISCUSSION...
KEY MESSAGE 1: Rain-free conditions will persist through the end
of October

A large area of high pressure will remain in place over the
Northeast U.S. and Central Appalachians. Expect mainly clear
skies and rain-free conditions right through the upcoming week.

Fog is a tough call for tonight. HREF and REFS probabilities are
highest around LNS and over the NW mtns. However, clouds moving
in from the NW could keep the NW from getting too foggy. The
best bets are the same places as have been the last few nights
(W Br Susq and Susq above Harrisburg, and Lake Raystown). Have
mentioned patchy fog in many places due to the uncertainty, but
kept dense fog mention to IPT/LNS.

Moderate variations will occur in daily and nocturnal
temperatures as at least one weak, dry cold fronts move SE
across the Commonwealth during the upcoming 5-6 days. Wind
direction/speed and cloud cover will also show some minor day-
day variations.

The first of the aforementioned dry cold fronts will slip SE
across the CWA Monday night into early Tuesday, but with only
limited moisture to work with, just some periods of BKN, shallow
strato cu and cirrus will occur with no rainfall expected beyond
a few sprinkles over the Northern Mtns Monday night. Have kept
the PoPs below mentionable for now on Mon night. This front
seems like it may slide in before it makes low clouds in the nrn
tier.

After a brief shot of seasonably cool air Tuesday and Wed
(directed mainly at the NE half of the state), a late
week/Saturday rebound in temps (to well above normal values in
the low-mid 60s across the Mtns and upper 60s to mid 70s in the
Central and Southern Valleys) will follow. A second, weak
frontal boundary could brush by across the Northern tier
counties Friday afternoon and night. New Day8 is wet (40-60
PoPs) as the pattern shifts to a more-zonal flow for the east.
GFS is still dry, though. Models/members are not in as good of
agreement from then onward.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Bright moonlight skies and light winds will prevail overnight,
as high pressure remains over the area. A few high clouds,
mainly at BFD.

As was the case last night, a very strong inversion could
result in some fog and lower clouds late, even with the very dry
air. Overall I did not change much from the 18Z TAF package for
overnight.

More detail below.

The greatest chances for fog and lower CIGS are at IPT, MDT,
and LNS, given weaker flow down there, closer to the high
center.

Outlook...

Mon-Fri...VFR prevailing conditions.

&&

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

&&

$$

WHAT HAS CHANGED...Dangelo
KEY MESSAGES...Lambert/Dangelo
DISCUSSION...Lambert/Dangelo
AVIATION...Martin/Lambrech