767
FXUS61 KCTP 142355
AFDCTP

Area Forecast Discussion
National Weather Service State College PA
755 PM EDT Fri Aug 14 2026

.WHAT HAS CHANGED...
* SPC Severe wx risk has decreased over SW PA for Sat/night
  while WPC Excessive Rainfall risk has expanded a bit for Sat-
  Sun timeframe.

&&

.KEY MESSAGES...
1) Rain over the SW won`t be enough to cause flooding over the
next 24-36 hrs, but the risk returns Sat night with deep
convection and possible heavy rain. Then the risk expands to
the entire CWA for Sun-Sun night.

2) Fog tonight.

&&

.DISCUSSION...
KEY MESSAGE 1: Rain over the SW won`t be enough to cause
flooding over the next 24-36 hrs, but the risk returns Sat night
with deep convection and passable heavy rain. Then the risk
expands to the entire CWA for Sun-Sun night.

Rain is along a weak boundary and flowing right over the wettest
area of the CWA. Thankfully, it is light and expected to remain
that way as no ltg has been observed upstream and it should stay
as stable as it has been.

There is just a tiny risk of one of the cu out in the rest of
the CWA poking through the cap and making a few raindrops. Have
only spotty PoPs for that possibility, and mainly in the NE.

As moisture increases ahead of a very mature cyclone crossing
the Great Lakes on Sat night, overrunning precip will develop.
The rain will be likely be over the SW where it is already the
wetter place in the CWA. FFGs are currently above 1.25"/hr, and
a mainly dry time Sat should help those rise a little. But, as
we get closer in time, we will have to consider a (flash) flood
watch for Sun. Chose to hold off at this point due to the time
range and uncertainty with how heavy and repetitive the
rain/storms will be later this weekend, and especially how wide
of an area to cover with a watch. ERO from WPC hydro forecasters
has nearly all of the CWA (nrn tier = not yet) in the SLGT risk
category for Day 3 (Sun).

KEY MESSAGE 2: Fog tonight.

As we clear out tonight, some fog is expected as Fri AM. We
aren`t expecting it to be any better or worse than last night.
The valleys will be more likely to have fog, and down in the SW
where there is going to be more ambient moisture.

&&

.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
Precipitation has ended across the state and dry conditions are
anticipated for this TAF package. Have reintroduced some early
morning visibility restrictions at BFD with sufficient cooling
likely to develop fog in northern PA. Whether it is strong
enough cooling to reach BFD remains a failure mode for fog
development, so trends will be watched for the next TAF
package/if any amendments will be needed. High remaining
moisture remaining at JST and valley fog development in the
valleys around UNV may need to be watched for visibility
restrictions but kept VFR for now. Dry, VFR conditions in store
for Saturday with high clouds streaming in the west ahead of the
convective complex responsible for Sunday`s rain.

Outlook...

Sat...AM fog possible, otherwise VFR.

Sun...Restrictions probable in showers/thunderstorms.

Mon-Tue...VFR most of the time. Chance of showers/tstm Monday.

Wed...Afternoon showers possible, restrictions possible, VFR
otherwise.

&&

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

&&

$$

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