Glasgow, Delaware 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

696
FXUS61 KPHI 131855
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
255 PM EDT Fri Jun 13 2025

.SYNOPSIS...
A frontal boundary will stalls out across the southern Delmarva
where it will remain through the weekend. Several waves of low
pressure with showers and storms will impact the region along
with below normal temperatures through early next week. Bermuda
high pressure will then begin to take hold toward the middle of
next week with increasing temperatures and daily chances of
showers and storms remaining. A cold front may impact the region
later in the week.

&&

.NEAR TERM /THROUGH SATURDAY/...
A weak frontal boundary remains draped over the Mid-Atlantic. That
boundary extends back to low pressure over the Midwest. That low
will track on that boundary late tonight and will move off the Mid-
Atlantic coast Saturday afternoon. A few weak disturbances will
develop on that boundary ahead of the primary low as shortwave
energy spins off ahead of that low, and this will result in periods
of wet, cool, and showery conditions.

Isolated showers develop this afternoon and evening, with a few
stronger to possible severe storms over southern Delaware and
southern portions of the eastern shores of Maryland as there is a
fair amount of SB CAPE in excess of 1500 J/kg over Delmarva.
However, the bulk of the activity will hold off until closer to
midnight as the first weak low passes south of the region. Showers
with scattered thunderstorms will impact the area late tonight
through Saturday morning. Mid-level instability will be minimal, so
not expecting severe weather. Locally heavy rain showers are
possible from time to time, but the flooding threat is minimal as
well.

There should be a break in the rainfall from around midday or so,
and then another round of showers and scattered thunderstorms will
develop Saturday afternoon and evening with the passage of the
primary low. With PWATs 1.7-2.0 inches, locally heavy rain resulting
is minor flooding is possible, but the flash flood threat will be
minimal.

Lows tonight will be in the 60s, and then highs on Saturday will
range from the upper 60s to low 70s for much of New Jersey and
southeast Pennsylvania, and then in the vicinity of the boundary,
highs will be in the 70s and possibly around 80 in Delmarva.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
The short term period through Monday will remain cloudy, showery,
drizzly, and overall dreary with below normal temperatures. Overall,
nothing of particular interest to note as far as impacts go with the
convective activity in our region. That said, this is be a fairly
low predictability period regarding any details of the timing and
coverage of showers.

Quasi-zonal and relatively weak flow will prevail aloft through
Sunday. A more pronounced shortwave trough looks to approach the
area by Sunday night and Monday morning. At the surface, there does
look to be a weak surface high across New England that may wedge
itself southward Saturday night into Sunday, keeping things a tad
drier for that time period. As the upper level shortwave arrives for
Sunday into Monday, shower chances do increase then.

Temperatures Saturday night will be in the mid 50s to low-60s and
they will not warm up much transitioning into Sunday, only
getting into the mid 60s to around 70. Depending on how far
south the front sinks too, temperatures could be another 5 to 10
degrees cooler than forecast thanks to the onshore flow. We can
expect a near carbon- copy Sunday night and Monday as well.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
Gradually improving conditions through midweek with our weekend
frontal boundary finally moving offshore Tuesday. Another weak
shortwave trough arrives late Tuesday, bringing a low-end chance for
some precip, but overall low confidence. Weak southeast flow will
help temperatures rebound slightly, back into the mid 70s to low
80s. Come Wednesday, we will see more influence from an offshore
Bermuda High bringing southwest flow back into the region. Afternoon
temperatures will jump back up into the 80s area-wide. Thursday will
be even warmer with temperatures reaching the low-90s in spots. A
few afternoon showers and thunderstorms are possible too with an
approaching frontal boundary late Thursday. Behind the front,
drier and seasonably warm Friday.

&&

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

Rest of today...VFR. E winds around 10 kt. High confidence.

Tonight...CIGs lower to IFR at KMIV/KACY before 06Z and all
other terminals after 06Z. LIFR CIGs at KMIV/KACY prior to 12Z.
MVFR or lower VSBYs in RA/BR. A passing TSRA possible, but will
not include in the TAF. E-NE winds 5 to 10 kt. High confidence
overall, low confidence on timing as to when conditions will
deteriorate.

Saturday...IFR CIGs most of the day with improvements to MVFR
possible after 18Z. MVFR VSBYs in SHRA from time to time.
Passing TSRA possible, but will not include in the TAF. E to NE
winds 5 to 10 kt. Moderate confidence.

Outlook...

Saturday night through Monday night...MVFR and IFR conditions
prevailing. Periods of showers and isolated thunderstorms. Easterly
winds. Visibility restrictions likely at times.

Tuesday...Restrictions probable initially, though some
improvement anticipated. Scattered showers or storms possible
late.

Wednesday...VFR likely. Isolated showers and perhaps a storm
remain possible.

&&

.MARINE...
A frontal boundary remains draped over the Mid-Atlantic. Low
pressure rides along that boundary tonight and passes through the
Mid-Atlantic waters on Saturday.

Sub-Small Craft Advisory conditions expected. E-SE winds around 10
kt tonight, then E-NE winds 5 to 10 kt, increasing to 10 to 15 kt
with gusts up to 20 kt in the afternoon. Seas 2 to 3 feet.

VSBY restrictions in fog, and VSBY restrictions in showers and
scattered thunderstorms tonight through Saturday morning, then again
Saturday afternoon.

Outlook...

Saturday night through Monday...Overall, sub-SCA conditions
expected, though there is the potential for SCA conditions Sunday
night through Monday. VSBY restrictions in showers, drizzle, and
isolated to scattered thunderstorms throughout this period. Areas of
fog also possible.

Tuesday and Wednesday...Sub-SCA conditions expected. Chances of
showers/storms remain.

Rip Currents...

For today, east- northeast winds around 5-10 mph turn more
easterly in the afternoon. Breaking wave heights remain around
1-3 feet with a weak southeasterly swell of 1 foot around 9
seconds. There will be a LOW risk for dangerous rip currents at
all beaches.

For Saturday, weak southerly winds in the morning will
transition to northeasterly in the afternoon and increase to
around 10 mph. Breaking wave heights remain around 1-3 feet with
a continued weak southeasterly swell around 1 foot at 9-10
seconds in length. Will maintain a LOW risk for dangerous rip
currents at all beaches.

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

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...Air Quality Alert until 11 PM EDT this evening for NJZ009-010-
     012>021-026-027.
DE...None.
MD...None.
MARINE...None.

&&

$$

SYNOPSIS...MJL
NEAR TERM...MPS
SHORT TERM...MJL/Staarmann
LONG TERM...MJL/Staarmann
AVIATION...MJL/MPS
MARINE...MJL/MPS