Bethlehem, Pennsylvania 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

605
FXUS61 KPHI 102313
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
713 PM EDT Tue Jun 10 2025

.SYNOPSIS...
A cold front is moving through now and will be offshore by
tonight. High pressure builds in for Wednesday, keeping things
quiet and warm for Wednesday and Thursday. A cold front moves in
from the north later on Friday, stalling out near or over the
area for the weekend. Several waves of low pressure ride along
the front bringing unsettled weather for the weekend and start
of next week.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
715 PM update...
Increased POPS this evening given poor handling of NBM POPs
with passing cold front. That said, still expect minimal
coverage of shower activity rest of this evening and should wind
down overnight as front passes east. Didn`t put in any haze into
grids but we should see a push of Canadian smoke back into the
region for the next few days. No other changes of note at this
time.

Afternoon discussion...
Our first boundary continues to inch off
to the east this afternoon. Eventually, a cold front that is
still off to our west will move into our area late afternoon
into the evening and move offshore tonight. We are seeing a bulk
of the clouds and showers associated with the first boundary
continuing to move east. This activity looks to have mainly
ended. Additional isolated showers or thunderstorms look
possible into this evening with the cold front where we still
have the threat for an isolated strong to severe storm. This is
due to strong bulk shear and also models indicating the
potential for the atmosphere to destabilize a bit before the
cold front arrives. Any instability looks limited overall.
Overnight, we see clouds decrease and trend drier behind the
cold front. Lows tonight range from the mid 50s to mid 60s.

A high pressure system builds in for midweek which leads to some
nice weather. We see sunshine return to the area and temperatures
climb into the upper 70s to mid 80s. There will not be too much in
the way of humidity tomorrow thanks to today`s cold front.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/...
High pressure remains in control through the middle of the week,
keeping things dry into Friday morning. We start out with clear
skies and tranquil conditions for Wednesday night with lows
mainly in the low to mid 60s. Warm west/southwesterly flow
strength. Highs around the I-95 corridor as well as interior
southern NJ likely get into the low 90s, and mid to upper 80s
elsewhere. PHL has not recored a 90 degree day yet, which the
first one typically comes in May. NBM probability of highs over
90 for Philadelphia is currently between 60-80%. Humidity won`t
be overly oppressive either and apparent temperatures will only
be a degree or two higher than the actual temperature, with
heat headlines highly unlikely to be needed. A shortwave tries
to dive in on Thursday, which could touch off a few
showers/isolated thunderstorms in the Poconos, but nothing of
significance.

Mostly clear to partly cloudy skies for Thursday night but it
will be mild coming off our likely warmest day of the year.
Overnight lows generally get down into the mid to upper 60s, but
wouldn`t be surprised to see some spots within the urban
corridor fail to fall below 70.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
A cold front sags down from the north on Friday afternoon, stalling
out over the area for the weekend. Several waves of low pressure
will ride along the front, with periods of showers and isolated
thunderstorms expected through the long term. Model guidance tends
to struggle with setups like these, and this case is no different.
Not expecting a weekend washout, but rather periods of rain with a
few thunderstorms mixed in and mostly cloudy skies outside of any
precipitation. Latest NBM seems to target Saturday afternoon and
evening with the highest PoPs (50-70%), which falls in line
with individual deterministic guidance members. PoPs remain in
the grids through the weekend and into next week as the front
lingers. Given the uncertainty of the pattern, would expect
changes as we get closer. However, not expecting any hydro or
severe weather issues as the higher instability will be off to
the south. All in all, just looks like another weekend featuring
rain.

While Friday will be warm with highs in the mid to upper 80s
ahead of the front, temperatures cool off over the weekend.
Things have trended a bit warmer for Saturday as the morning now
looks drier. Highs could get into the low to mid 80s. Sunday
onward looks cooler with highs generally in the 70s.

&&

.AVIATION /23Z TUESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Tonight...VFR. Winds generally out of the west 5-10 knots. High
confidence.

Wednesday...VFR. Winds generally west to southwest at 5-10
knots, but some gusts may approach 20 kts in the afternoon. High
confidence.

Outlook...

Wednesday through Thursday Night...VFR. No significant weather.

Friday...VFR to start but restrictions possible later in the day as
a cold front approaches with scattered showers and isolated
thunderstorms moving in.

Friday Night through Sunday...Restrictions expected (70-80%
confidence) at times with low clouds and showers around. Slight
chance of thunder (15%) during the afternoon both Saturday and
Sunday.

&&

.MARINE...
Tuesday through Wednesday...No marine headlines expected.

Outlook...

Wednesday Night through Saturday...No marine headlines
expected. Showers and isolated thunderstorms possible (40-60%)
on Saturday.

Rip Currents...

For Wednesday...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. As a result, a MODERATE risk for dangerous
rip currents is in place for all area beaches. The Full Moon
phase will occur on Wednesday as well, which may allude to
stronger than normal rip currents.

For Thursday...Southwest winds around 10 mph. Breaking wave
heights of 1-3 feet with a southeast swell of 1-3 feet around
9-10 seconds in length. As a result, a LOW risk for dangerous
rip currents is in place for all area 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...Fitzsimmons/Hoeflich/RCM
NEAR TERM...Guzzo
SHORT TERM...Fitzsimmons/Hoeflich
LONG TERM...Fitzsimmons/Hoeflich
AVIATION...Hoeflich/RCM
MARINE...DeSilva/Guzzo/Hoeflich