Rising Sun-Lebanon, Delaware 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

935
FXUS61 KPHI 110834
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
434 AM EDT Wed Jun 11 2025

.SYNOPSIS...
Cold front will move offshore later this morning. High pressure
builds in from the west today and will settle just south of the
area on Thursday. A weak cold front will approach from the
north late Thursday night as it stalls over the area into Friday
night. The stalled boundary will gradually sink south over the
weekend yielding unsettled weather for the weekend into the
beginning of next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
A cold front continues to progress east through the area this
morning which will be located offshore later this morning.

Benign weather is anticipated through tonight as zonal flow aloft
develops with surface high pressure settling over the Appalachian
region. Light northwest winds this morning will ultimately settle
out of the southwest this afternoon, pumping in the warmer air into
the area. Skies will be sunny, however, there will be another plume
of wildfire smoke aloft passing through the region today. For this
reason, have included haze into the forecast for today. Skies should
become mostly clear tonight.

Highs today will be quite warm, topping out in the low/mid 80s for
most locales, with mid/upper 70s down the shore and in the Poconos.
Lows tonight will remain mild, generally in the low/mid 60s.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY/...
High pressure will largely remain in control through Thursday.
Mostly clear skies are expected for Thursday where temps are likely
to reach their warmest of the week, with highs in the upper 80s to
low 90s. Latest NBM probs continue to show a greater than 60% chance
of temps exceeding 90 degrees within the vicinity of the urban
corridor. A weak impulse aloft will also graze the area as well on
Thursday, which perhaps may spark off a few spotty showers and
thunderstorms in the Poconos, Lehigh Valley and northern New Jersey
in the afternoon. No severe weather is expected.

Any showers and storms will cease into Thursday night with the loss
of diurnal heating, so tranquil weather will hang on into Thursday
night under partly cloudy skies with lows mainly in the 60s to
around 70 degrees. Should remain fairly dry into the start of Friday
too with high pressure remaining nearby, however clouds will be on
the increase throughout the day as a slow-moving "stationary" front
sags south into the area. Temperatures will remain mild in the mid
to upper 80s across the coastal plain (70s N+W and along the coast),
but should be a few degrees cooler than Thursday due to the increase
in cloud cover. A few showers and thunderstorms may develop by
Friday afternoon (20-40%), but largely the unsettled weather should
hold off until Friday night and for the weekend.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
The "stalled" slow-moving frontal boundary will gradually sink south
through the area over the weekend. Several waves of low pressure
will ride along the front, yielding several periods of showers and
isolated thunderstorms over the weekend. Not anticipating a washout
by any means, however, there will be limited to little sunshine over
the weekend. Forecast guidance usually does not handle these types
of patterns/set-ups well so there likely will be changes to the
forecast in the coming days. But for now, the wettest period seems
to be the Saturday afternoon into Saturday night period where PoPs
are in the 60-80% range, with 30-50% PoPs for Sunday into early next
week.

All in all, another wet period is on the horizon with several
opportunities for rainfall. The overall nature of the pattern does
not really support any severe weather, except possibly on Saturday,
but there has been an increase in the concern for potential hydro
issues over the weekend. WPC has introduced a MARINGAL risk (Level
1/4) for excessive rainfall on Saturday and Sunday for the entire
region. Further details/tweaks to come in the coming days.

In terms of temperatures, Saturday will quite seasonable as much of
the area will be on the southern side of the "stalled" boundary.
With the boundary located mainly south of the area on Sunday into
next week, temperatures may range a few degrees below normal.

&&

.AVIATION /09Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Through 12Z...VFR with decreasing clouds. Light southwest winds will
gradually turn northwest winds around 3-5 kt, becoming light and
variable at times. High confidence.

Today...VFR/SKC. Haze likely in the afternoon from wildfire smoke
aloft. Light west-northwest winds in the morning around 5-8 kt will
become west-southwest winds around 8-13 kt this afternoon. High
confidence.

Tonight...VFR/SKC. South-southwest winds around 5 kt or less.
High confidence.

Outlook...

Thursday through Friday...VFR expected. A slight chance for showers
and thunderstorms on Thursday afternoon at KRDG and KABE. Otherwise,
a chance for showers and thunderstorms possible at all terminals on
Friday.

Friday night through Sunday...Sub-VFR conditions probable especially
on Saturday into Saturday night. Periods of rain with isolated
thunderstorms expected.

&&

.MARINE...
No marine headlines are in effect through tonight. Southwest winds
will become northwest winds around 5-10 kt this morning, before
becoming south-southwest around 10-15 kt this afternoon and into
tonight. Seas of 2-4 feet. Fair weather.

Outlook...

Thursday through Sunday...No marine headlines expected. Winds will
largely remain below 20 kt with seas of 2-3 feet. Fair weather
expected through Friday with periods of showers and thunderstorms
expected Friday night through Sunday.

Rip Currents...

For Today, West-northwest winds around 5-10 mph, becoming south-
southwest in the afternoon. Breaking wave heights of 1-3 feet with a
decreasing southeast swell of 2-3 feet around 6-7 seconds in length.
The Full Moon is also today which can make the rip current threat
higher than it otherwise would have been.  As a result, we have a
LOW risk of dangerous rip currents for the beaches in Monmouth
County, NJ and the Delaware beaches with a MODERATE risk from Ocean
County south through Cape May as the angle of the flow in these
areas will be more onshore.

For Thursday, the overall seas and winds won`t be too different from
today but we`ll be starting to get away from the Full Moon so we
have a LOW risk of dangerous rip currents at all beaches.

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

&&

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

&&

$$

SYNOPSIS...DeSilva/Hoeflich
NEAR TERM...DeSilva
SHORT TERM...DeSilva/Hoeflich
LONG TERM...DeSilva/Hoeflich
AVIATION...DeSilva
MARINE...DeSilva/Fitzsimmons