Ridley, Pennsylvania 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

912
FXUS61 KPHI 271105
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
705 AM EDT Sun Jul 27 2025

.SYNOPSIS...
The front situated off to our south and west will lift back
north as a warm front today, ahead of a weak cold front that
will pass through Sunday night. High pressure returns for Monday
and Tuesday, before another cold front passes through Wednesday
into Thursday. High pressure returns for Friday into next
weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
The daytime hours today will certainly not be the ideal weekend
day with low pressure passing well to the north which will
eventually drag a cold front across the area later on tonight.
Ahead of the cold front, plenty of clouds are expected across
the area today in the wake of the warm front passing through
this morning. Some chances for showers for much of the area this
morning as a result of the frontal passage as well. The
exception may be across southern Delaware and the central
Eastern Shore of Maryland where some clearing may occur late
this morning as the warm front pushes north. As a result,
temperatures look to warm a bit more across this portion of the
region to right around 90 and with dew points surging into the
upper 70s, heat indicies this afternoon will make it into the
100-107 degree range. As a result, a Heat Advisory has been
issued for Talbot and Caroline counties in Maryland and Inland
Sussex County in Delaware. High temperatures elsewhere stay in
the mid-upper 80s.

As we get into the afternoon, increasing instability across the area
with daytime heating will result in showers and thunderstorms
developing through much of the remainder of the day. Likely and
categorical pops will continue in the forecast. These showers and
storms will be very efficient rain producers resulting in the
potential for heavy rainfall. Storm motions look to be fast enough
to keep the threat for flooding localized but if storms repetitively
train over an area, the threat for flash flooding will be higher.
WPC has a SLIGHT risk for much of the area with a MARGINAL risk for
the southeastern portion of the region where the threat for training
thunderstorms is slightly less. SPC maintains a MARGINAL risk for
severe thunderstorms too with damaging winds as the primary threat.

Convection looks to diminish later on this evening with the loss of
daytime heating and as the cold front pushes through the region.
Unfortunately, the cold front won`t decrease temperatures too much.
Lows tonight fall back into the low-mid 70s for most locations again
tonight.

&&

.SHORT TERM /MONDAY THROUGH TUESDAY/...
Monday and Tuesday will feature dry conditions with a mostly sunny
sky both days as broad high pressure builds into the region from the
south. The more notable part of the forecast will again be the
heat. Highs on Monday will mainly be in the upper 80s to mid 90s
with highs on Tuesday in the 90s. Dewpoints will also be in the
70s both days, so it will be very humid. This will result in
heat indicies around the region in the 90-102 degree range on
Monday and Tuesday. Right now, there is borderline Heat Advisory
criteria for parts of the area and there is not enough
confidence currently to issue any headlines for the beginning of
the week regarding the heat.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
On Wednesday, we see another day of the heat and very humid
conditions. Wednesday looks to be the day with the highest heat
indicies in this stretch of the heat and humidity. Temperatures will
mainly be in the mid 90s with dewpoints in the 70s which will lead
to heat index values in the 95-105 degree range. Most of the day
Wednesday will be dry with clouds increasing. A cold front moves in
late Wednesday or even Wednesday night bringing some showers and
thunderstorm potential to the area. There are some signs for the
potential for severe weather on Wednesday but there is still a great
deal of uncertainty. One big part of the uncertainty is the timing
of the front that has been pushed back later which would lead to
less favorable conditions for severe weather. The threat for
localized flash flooding during this timeframe will also need to
be watched with moisture increasing and PWATs at times reaching
over 2 inches.

The current progression of the front keeps it slower which has it
not moving through the area until midday Thursday and continuing to
be located close to the area for the remainder of Thursday which
keeps the potential for showers and thunderstorms through the day.
Behind the cold front, a high pressure system builds into the Great
Lakes which leads to drier conditions on Friday and Saturday with
temperatures being as much as 5-10 degrees below average through
next weekend.

&&

.AVIATION /11Z SUNDAY THROUGH THURSDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Today...Low clouds and lower vsbys in showers and fog look to
prevail across the region for the early part of daytime Sunday.
We`ll go along with the guidance which suggests that high-end
IFR or low- end MVFR conditions will be across the region. Low
confidence in when/if improvements will take place, but even if
prevailing conditions improve, convection this afternoon may
result in further restrictions. For now have mostly placed VCTS
during 19-23Z period most terminals. South winds mostly around
10 knots. Low confidence.

Tonight...Conditions improving to VFR after the departure of showers
and thunderstorms later in the evening. West-northwest winds around
5 knots or less. Moderate confidence.

Outlook...

Monday through Wednesday...VFR. No significant weather expected.

Wednesday night through Thursday...Sub-VFR conditions possible with
a chance of showers and thunderstorms.

&&

.MARINE...
No marine headlines expected through tonight. Winds will become
mainly southerly for the daytime hours today, around 10-15 knots.
Following the passage of a front tonight, winds will turn to the
west-northwest. Seas of 2-3 feet throughout the period. Ahead of the
front, there will be showers and a few tstms across the waters early
this morning and then again this afternoon and evening. Higher winds
and seas near tstms are expected.

Outlook...

Monday through Thursday...No marine headlines expected as winds
will largely remain below 20 kt and seas around 2 feet or less.
Fair weather expected for Monday through Wednesday. Another
chance of showers and storms are possible for Wednesday night
into Thursday.

Rip Currents...

For Sunday, winds be southerly around 5 to 10 MPH. Breakers of
around 1 to 2 feet are expected. Period will be 5 to 8 seconds.
As a result, a LOW risk for rip currents is in place at all
beaches.

For Monday, winds turn northerly and then easterly around 5 to
10 MPH. Breakers remain around 1-2 feet. Period will remain 5
to 8 seconds. As a result, a LOW risk for rip currents is in
place at all beaches.

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

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...Heat Advisory from 11 AM this morning to 8 PM EDT this evening
     for DEZ003.
MD...Heat Advisory from 11 AM this morning to 8 PM EDT this evening
     for MDZ019-020.
MARINE...None.

&&

$$

SYNOPSIS...DeSilva/Guzzo
NEAR TERM...AKL
SHORT TERM...Guzzo
LONG TERM...Guzzo
AVIATION...AKL/Guzzo
MARINE...AKL/Guzzo