272
FXUS61 KPHI 142046
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
446 PM EDT Fri Aug 14 2026

.WHAT HAS CHANGED...
Updated the rip currents section.

&&

.KEY MESSAGES...
1. Cold front moves away and high pressure builds in for
Saturday.

2. Unsettled weather returns Sunday into Monday.

&&

.DISCUSSION...
KEY MESSAGE 1...Cold front moves away and high pressure builds in
for Saturday.

The front that has been slowly moving across the area the previous
few days is now exiting our CWA across southern Delaware and NE Maryland.
Showers and a few tstms accompany the front, but will diminish this
evening. We`ll continue with the chance or low likely pops for the
next several hours.

High pressure will build in behind the front tonight and remain for
Saturday. Except for some patchy rural fog overnight, fair weather
is expected through Saturday.


KEY MESSAGE 2...Unsettled weather returns Sunday into Monday.

The next storm system arrives Sunday into Monday as a surface low
moves across the Great Lakes, Ohio Valley, and eventually the
Mid-Atlantic, bringing the chance for showers and thunderstorms.

The biggest change with previous guidance is the spread in the
timing of precipitation. There are some models that show
precipitation moving in as early as 06Z to 12Z Sunday Morning.
That being said, there are still a few models not showing rain move
in until the afternoon. The net result of this uncertainty is that
there are PoPs in place from late Saturday night all the way through
Monday. This long period of rain mention is an artifact of the
differences between models in the timing, but we don`t expect rain
to occur for that entire period.

Regardless of the timing, the primary threat at this point is heavy
rain leading to flash flooding. Global guidance shows PWAT values
surging back into the 2" range, increasing the potential for heavy
downpours within any thunderstorms that develop. As a result, WPC
does have much of our area in a Slight Risk (level 2 out of 4) in
the Excessive Rainfall Outlook for Sunday.

Depending on the timing of the storms, some instability may be in
place to support a severe potential. Latest guidance is a bit more
robust with upper-level forcing for ascent as well as shear,
probably linked to some convectively enhanced features of the
incoming trough which are tough to resolve a few days out. At this
point, it remains too early to lock down any specifics for severe
and flash flood, but we will need to monitor the potential over the
next couple days.

&&

.AVIATION /20Z FRIDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of today...VFR. Light and variable winds trending more SW
or W by sunset. High confid except for wind directions.

Tonight...VFR expected. Patchy rural fog possible. Light
variable or calm winds. High confid.

Saturday... VFR expected. Northeast winds 5 to 10 knots
developing. high confid.

Outlook...

Saturday night through Sunday Morning... VFR. No significant
weather. Increasing clouds Sunday.

Sunday Afternoon through Monday...Sub-VFR conditions likely (60-70%)
at times with widespread showers and a few embedded thunderstorms
anticipated.

Tuesday and Wednesday...VFR conditions expected.

&&

.MARINE...
Winds and seas will remain below SCA levels as high pressure
builds in tonight and remain into Saturday. Except for a few
evening TSTMs near the Delaware coastal waters, Fair weather
will be across the waters.

Outlook...

Saturday night and Sunday...No marine headlines expected.

Sunday Night through Monday...SCA conditions possible (30-40%) as
seas near 5 feet and southerly wind gusts near 25 kt.

Tuesday and Wednesday...No marine headlines expected.

Rip Currents...

For Saturday, winds turn from northeast to east through the day
at 5-10 mph. Breaking wave heights will be around 2 feet or
lower. There is an onshore swell with a period of 8-10 seconds.
For these reasons, there is a LOW risk for rip currents at all
beaches.

For Sunday, winds turn from southeast to southerly through the
day while also increasing. Winds out of the south reach 15-20
mph with higher gusts. Breaking wave heights will also be
increasing through the day to 2 to 4 feet. An onshore swell
remains with a period of 8-10 seconds. For these reasons, there
is a MODERATE risk for rip currents at the Jersey Shore and a
LOW risk for rip currents at the Delaware Beaches.

For specific beach forecasts, visit weather.gov/beach/phi

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...None.

&&

$$

DISCUSSION...OHara/Staarmann
AVIATION...OHara/Staarmann
MARINE...Guzzo/OHara/Staarmann