Special Marine Warning 39, NWS Philadelphia/Mount Holly

986 
FZUS71 KPHI 071845
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
245 PM EDT Sun Jun 7 2026

ANZ450-480-071930-
/O.CON.KPHI.MA.W.0039.000000T0000Z-260607T1930Z/
245 PM EDT Sun Jun 7 2026

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 330 PM EDT...

For the following areas...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 NM...
Waters from Sandy Hook NJ to Manasquan Inlet NJ from 20 to 40 NM...

At 245 PM EDT, a severe thunderstorm was located near Sandy Hook
Reef, moving southeast at 25 knots.

HAZARD...Wind gusts 34 knots or greater and large hail.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and 
         suddenly higher waves. Large hail could result in 
         structural damage.

The severe thunderstorm will remain over mainly open waters.

LAT...LON 4025 7364 4019 7359 4013 7366 4031 7393
      4035 7394 4036 7393 4038 7393 4038 7392
      4040 7391
TIME...MOT...LOC 1845Z 306DEG 25KT 4036 7386 

HAIL...>.75IN
WIND...>34KTS

$$

RCM

882 
FZUS71 KPHI 071858
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
258 PM EDT Sun Jun 7 2026

ANZ450-480-071908-
/O.CAN.KPHI.MA.W.0039.000000T0000Z-260607T1930Z/
258 PM EDT Sun Jun 7 2026

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were... 
Coastal and outer waters from Sandy Hook to Manasquan Inlet NJ...

The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.

LAT...LON 4025 7364 4019 7359 4013 7366 4031 7393
      4035 7394 4036 7393 4038 7393 4038 7392
      4040 7391
TIME...MOT...LOC 1856Z 306DEG 25KT 4030 7376 

$$

RCM

Area Forecast Discussion
National Weather Service Mount Holly NJ
130 PM EDT Sun Jun 7 2026

.WHAT HAS CHANGED...
Added isolated showers to forecast area for rest of the day
today.

Confidence is increasing in potentially dangerous heat late next
week.

Updated aviation discussion for 18z TAFs.

&&

.KEY MESSAGES...
1. Isolated showers and perhaps even a stray thunderstorm thru
the rest of this afternoon.

2. Mainly dry conditions expected through the middle of the week
with temperatures gradually warming.

3. Dangerous heat will be possible across the region late this week
and into this weekend with a few chances for thunderstorms.

&&

.DISCUSSION...
KEY MESSAGE 1...Isolated showers and perhaps even a stray
thunderstorm thru the rest of this afternoon.

A secondary front and associated upper level shortwave is moving
through late today, ushering in the cooler and drier airmass.
Most areas will stay dry today but spotty showers and even a
stray thunderstorm have developed along and ahead of it, with
best chance of thunder near the coast. Not expecting much in
terms of rainfall or impacts, but anyone expecting a dry and
tranquil day may be somewhat surprised.

KEY MESSAGE 2...Mainly dry conditions expected through the
middle of the week with temperatures gradually warming.

The region will remain embedded within a belt of somewhat
enhanced mid-level flow through Monday as a sharp trough located
over New England dives south into the Western Atlantic.
Thereafter, mid-level ridging will likely begin to take shape
across the region through mid-week. At the surface, high
pressure in the wake of a cold front will shift into the area,
and generally remain in place through Tuesday.

Easterly flow will result in a notable east-west gradient in
temps on Monday, with lower 70s closer to the coast (probably
60s right at the coast) and low to mid 80s well inland.
Temperatures Monday night will fall into the low to mid 50s,
maybe some 40s in the typical cool spots. The cool down does
look to be fairly short lived with high pressure taking shape
across the area. Tuesday will be a bit warmer, with temperatures
generally climbing into the low to mid 80s.

Dry conditions are expected through Tuesday night.

KEY MESSAGE 3..Dangerous heat will be possible across the
region late this week and into this weekend with a few chances
for thunderstorms.

In general, mid-level ridging is expected to remain in place
across the region into this weekend, though a few disturbances
embedded in the flow could clip the area. At the surface, high
pressure will largely dominate, though it is expected to begin
to weaken as it moves more toward the southeastern US.

The pattern in place will begin to support daily chances for
showers and thunderstorms Wednesday through Sunday, primarily in
the form of diurnally driven convection. PoPs through this
period are generally 20-40%. It is worth mentioning though, that
some of the machine learning guidance from CSU is beginning to
highlight Friday as potentially a severe weather day. Still a
lot of details to tune out between now and then, but just
something to monitor at this time.

Of greater concern is that this pattern will also favor
increasing heat and humidity across the region. Temperatures
beginning on Wednesday are likely to be in the mid to upper 80s
across the region, rising into the low to mid 90s on Thursday
and into the weekend. With increasing moisture, heat indices
could potentially reach or exceed 100 degrees in spots beginning
as early as Thursday. There will be limited relief at night,
with lows in the upper 60s to low 70s areawide by late the week
and into the weekend. Trends will continue to be monitored as
this level of heat could ultimately necessitate the need for
heat headlines across parts of the region should it materialize.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of Today...Mainly VFR. Inserted VCSH as well given spotty
showers have devloped across the area, but any impacts should be
minimal and brief. TS could occur east of the terminals, but
not expected at any terminals as of now. West/northwest winds
around 10-15 kt with gusts 20-25 kt. Wind gusts diminish between
23z-02z but go more north/northwesterly around that time.
Moderate confidence.

Tonight...VFR. Winds gradually veering as the night goes on,
starting the night north/northeasterly, with east/northeast
winds expected by sunrise, around 5-10 kt. Moderate confidence.

Monday...VFR. East/northeast winds around 5 to 10 kt. High
confidence.

Outlook...

Monday night through Tuesday night...VFR. No significant weather
expected.

Wednesday though Friday...Prevailing VFR. A few brief periods
of sub- VFR conditions possible with isolated to scattered
afternoon thunderstorms each day.

&&

.MARINE...
Isolated t-storm could result in a special marine warning this
afternoon on the waters, but otherwise should generally be sub-
SCA conditions through Monday. Winds out of the west this
afternoon around 10-15 kt, becoming north/northeasterly tonight
around 10-20 kt, then east Monday 10-20 kt. Seas of 2 to 3 feet
are expected.

Outlook...

Monday night...No marine headlines expected. Winds generally
less 10 kt with seas around 2-4 feet.

Tuesday through Tuesday night...No marine headlines expected.
Winds generally between 10-20 kt with seas around 2-3 feet.

Wednesday through Wednesday night...SCA conditions possible
mainly due to wind gusts around 25 kt. Seas around 2-4 feet,
possibly up to 5 feet.

Thursday through Friday...No marine headlines expected. Winds
generally between 10-20 kt with seas around 2-3 feet.

Rip Currents...

For today, winds will be oriented offshore around 10 MPH with
breaking waves around 2 feet. A medium period 8 second swell is
expected. While there is an easterly swell, elected to go with a
LOW Risk for the development of rip currents due to the offshore
wind direction and only 2 foot breaking waves.

For Monday...winds turn more onshore with a northeasterly swell
taking over. However, with a medium period swell remaining and
breaking waves only around 2 feet again, have elected to go with
a LOW risk for the development of rip currents at all beaches.

Ocean water temperatures are generally near 60 degrees for much
of the Jersey Shore and the low 60s for Delaware beaches. These
chilly water temperatures can quickly cause hypothermia and
physical incapacitation to anyone suddenly immersed in the
water.

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

&&

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

&&

DISCUSSION...DeSilva/RCM
AVIATION...DeSilva/RCM
MARINE...DeSilva/RCM

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
506 AM EDT Sun Jun 7 2026

MDZ012-015-019-020-080915-
Kent MD-Queen Annes-Talbot-Caroline-
506 AM EDT Sun Jun 7 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Hoeflich

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1056 AM EDT Sun Jun 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     Hail             Spring Twp              40.32N 76.01W
06/06/2026  M0.25 Inch       Berks              PA   Trained Spotter

&&

RCM

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1102 AM EDT Sun Jun 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0715 PM     Tstm Wnd Dmg     1 E Ewing               40.27N 74.78W
06/06/2026                   Mercer             NJ   Trained Spotter

            Large limbed broken from one tree, another
            snapped at the roots, in close proximity to
            each other on the College of New Jersey
            campus. Time estimated from radar.

&&

RCM

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1106 AM EDT Sun Jun 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0710 PM     Tstm Wnd Dmg     Montville Twp           40.88N 74.36W
06/06/2026                   Morris             NJ   Trained Spotter

            Several trees uprooted along Cheryl Road.
            Time estimated from radar.

&&

RCM

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1222 PM EDT Sun Jun 7 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0706 PM     Tstm Wnd Dmg     Montville               40.91N 74.38W
06/06/2026                   Morris             NJ   Trained Spotter

            Delayed report... Spotter sent in photos of
            several uprooted trees, one falling onto a
            house in the Montville area. Time estimated.

&&