116
FXUS61 KPBZ 242324
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
724 PM EDT Thu Sep 24 2026

.WHAT HAS CHANGED...
Frost Advisory has been issued for eastern Fayette County (PA)
as well as Tucker and Preston Counties (WV) from 05z to 12z.

&&

.KEY MESSAGES...
1) Below-normal temperature lingers thru Friday and moderates
by the weekend. Frost Advisory issued for tonight into Friday
morning.

2) Trends continue away from local precipitation influenced by
coastal low pressure. Next best chance for rain will be
Tuesday/Wednesday of next week.

&&

.DISCUSSION...
KEY MESSAGE 1...

Amid strengthening surface high pressure, dry conditions and below-
normal temperatures will be likely thru the weekend. Tonight,
will feature the coldest temperature with values in the low 40s
to upper 30s. With a light breeze expected to persist overnight,
only protected valleys have a chance to see calm conditions
which could lead to frost development. Many could see isolated
patches of frost, however, the most likely area for frost is in
parts of northern West Virginia and the valleys along the
Appalachian ridge-line. A Frost Advisory was issued for eastern
Fayette County (PA) as well as Tucker and Preston Counties (WV).

As high pressure advances eastward, and flow aloft transitions
toward westerly/southwesterly, temperature trends seem likely to
return toward normal (maxima in the low 70s and minima in the
low 50s).

KEY MESSAGE 2...
Ensembles continue to trend away from weekend precipitation
associated with strengthening coastal low pressure as there is
more confidence with its placement. There is currently more
uncertainty on how quickly the low pressure system will lift out
of the Mid- Atlantic/New England area.

The next potential for rain appears to be in the Tue-Wed
timeframe, when a trough amplifies across the Upper OH Valley.
At this time, buoyancy appears meager, so potential for
hazardous weather appears low despite a stronger wind field.
There is still uncertainty in the strength and speed of this
trough, impacting timing and accumulation of the rain.

&&

.AVIATION /00Z FRIDAY THROUGH TUESDAY/...
VFR conditions will continue through the TAF period as high
pressure continues to dominate. Light east wind through the
night may back slightly to north-northeast by late Friday
morning. Valley fog is expected tomorrow, but there is a low
chance of it impacting any particular port in the morning, most
likely for FKL given the light easterly flow.

Outlook...
A prolonged period of VFR is likely through the middle of next
week, outside of any morning fog chances in river/creek
valleys. Chances of valley fog appear to be highest on
Saturday at this time, but widespread restrictions are not
favored.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
PA...Frost Advisory from 1 AM to 8 AM EDT Friday for PAZ076.
OH...None.
WV...Frost Advisory from 1 AM to 8 AM EDT Friday for WVZ511>514.

&&

$$

DISCUSSION...Lupo
AVIATION...CL