488
FXUS61 KPHI 241921
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
221 PM EST Mon Nov 24 2025

.SYNOPSIS...
High pressure will remain in control across the area through
tonight. Low pressure will begin to approach from the west on
Tuesday, bringing the start of unsettled weather. The low and
associated cold front will pass through Wednesday, with a few
reinforcing shots of cold air thereafter. Another high pressure
system will build in to end the week and for the start of the
weekend.

&&

.NEAR TERM /THROUGH TUESDAY/...
High pressure centered just west of the Appalachians will pass
overhead this evening before sliding off the Mid-Atlantic coast
late tonight. Low pressure developing over the Southern Plains
will lift to the north and east tonight through Tuesday morning.
A warm front extending from that low will lift north into the
region Tuesday afternoon.

In terms of sensible weather, generally mostly sunny skies on
tap for the rest of the day, then high clouds will move into the
region tonight. Clouds will thicken and lower throughout the
day Tuesday as that warm front gets closer. Conditions will be
dry for most of the period with some rain moving in from the
west starting around midday Tuesday before spreading east late
Tuesday afternoon.

Northwest winds gusting to 20 mph will back to the west and
diminish to 5 to 10 mph as the afternoon progresses. Winds
become mostly light and variable tonight, then a light southerly
flow develops on Tuesday both behind the departing high and
ahead of the approaching warm front.

Lows tonight will generally range from the low to mid 30s for
most of the area, though lows will be in the mid and upper 30s
in the urban areas, Delmarva, and along the coasts. A mild day
on tap for Tuesday with highs in the low to mid 50s north and
west of the Fall Line and in the upper 50s to low 60s across
southern New Jersey and Delmarva. Depending on how far north
that warm front can get on Tuesday will determine how warm it
gets and how far north that warmth spreads.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/...
A weak warm front will move through Tuesday night with more
stratiform rain moving through the area. This warm front will allow
for warmer air to filter in overnight and into Wednesday. Lows
Tuesday night are in the mid 40s to mid 50s. Highs on Wednesday are
in the 60s for most.

During the day Wednesday, a cold front will be approaching the area
from the west. The coverage of the precip looks more in the form of
rain showers as the general trend has been a bit more convective.
There is also the potential for an isolated thunderstorm with some
instability present. Best potential for a rumble of thunder looks to
be in Delmarva and southern NJ. We trend drier Wednesday night with
just some lingering showers that taper off as the cold front passes
through. Rainfall totals look to be between 0.25-0.50" with
localized higher amounts. Once the cold front passes, we see
strong cold air advection and winds increasing out of the west.
Wind gusts will start to increase to 25-35 mph across the area.
Lows Wednesday night will be in the upper 20s to upper 30s. Wind
chill values will be in the 20s and potentially the teens in
the Poconos.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
Winds continue to increase for Thursday and Friday with cold air
continuing to filter in. For Thanksgiving, the day looks dry but
cold and windy. Highs are in the mid 30s to mid 40s. Gusty winds out
of the west at 30-35 mph. Lows Thursday night are in the 20s. Wind
chills will be in teens when you factor in the windy conditions.

Friday looks to be the windiest day with gusts out of the west-
northwest at 30-40 mph. In this set-up, with all the cold air
filtering in across the region, there will be ongoing lake-effect
snow showers upstream of our area. Due to the wind shift of a more
NW component, we have the potential to see some snow showers in
the Poconos and northern NJ on Friday. Highs on Friday are in
the mid 30s to mid 40s. Lows Friday night are in the 20s. Wind
chill values are in the teens again. Our winds do decrease
Friday night as a surface high builds in and moves overhead into
Saturday. This will keep us dry Friday night into Saturday.

For the weekend, it is a colder start with highs on Saturday in the
mid 30s to low 40s. By Sunday, temperatures start to climb back into
the mid 40s to mid 50s for highs. There is also the signal for
another system to bring increasing precipitation chances on
Sunday.

&&

.AVIATION /19Z MONDAY THROUGH SATURDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of today...VFR. NW winds 10 to 15 kt with gusts to 20 kt
will begin to back to the west and diminish to 5 to 10 kt by 20Z
or so. High confidence.

Tonight...VFR. Light S winds, becoming nearly calm for most
terminals. High confidence.

Tuesday...VFR initially, then MVFR conds in RA starting after
18Z for KRDG/KABE and after 21Z for KTTN/KPNE/KPHL/KILG. S winds
5 to 10 kt. Moderate confidence overall. Low confidence on
timing.

Outlook...

Tuesday night through Wednesday...Periods of sub-VFR conditions are
expected in rain.

Wednesday night through Friday...VFR. Gusty west to northwest winds,
especially Thursday and Friday.

Saturday...VFR. West-northwest winds 5-10 knots.

&&

.MARINE...
Northwest winds 10 to 15 kt will become light and variable
tonight, then S 5 to 10 kt late tonight and Tuesday morning,
increasing to 10 to 15 kt with gusts up to 20 kt late in the
day. Seas 1 to 2 feet, building to 2 to 4 feet late Tuesday.

Outlook...

Tuesday night...A Small Craft Advisory has been issued for all of
the ocean zones for gusts of 25 knots out of the south with seas
near 5 feet.

Wednesday...SCA conditions possible with wind gusts of 20-25 knots
and seas near 5 feet.

Wednesday night through Thursday...SCA conditions are expected with
a west-northwest wind 20-30 kt and seas 4-6 feet.

Thursday night through Friday night. Gales expected with a west-
northwest wind of 35-40 kt and seas of 4-6 feet.

Saturday...SCA conditions possible early but winds and seas quickly
subsided through the day.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory from 6 PM Tuesday to 6 AM EST Wednesday
     for ANZ450>455.

&&

$$

SYNOPSIS...Cooper/Guzzo
NEAR TERM...MPS
SHORT TERM...Guzzo
LONG TERM...Guzzo
AVIATION...Guzzo/MPS
MARINE...Guzzo/MPS