Special Marine Warning 112, NWS Philadelphia/Mount Holly

Area Forecast Discussion
National Weather Service Mount Holly NJ
1006 PM EDT Tue Jul 21 2026

.WHAT HAS CHANGED...
The Severe Thunderstorm Watch was allowed to expire at 10 PM and
we've also cancelled the Flood Watch.

&&

.KEY MESSAGES...
1) The threat for severe weather and flash flooding has largely
ended for tonight, however some additional severe storms and flash
flooding will be possible Wednesday. Wednesday's severe weather and
flooding threat is not expected to be as widespread though as it
will be confined mainly to areas south and east of the urban
corridor.

&&

.DISCUSSION...
KEY MESSAGE 1...The threat for severe weather and flash flooding has largely
ended for tonight, however some additional severe storms and flash
flooding will be possible Wednesday. Wednesday's severe weather and
flooding threat is not expected to be as widespread though as it
will be confined mainly to areas south and east of the urban
corridor.

As of  10 PM, the Severe Thunderstorm Watch has been allowed to
expire and we've also cancelled the Flood Watch. That said, the area
still remains in the warm sector ahead of an approaching cold front
and though the instability has significantly decreased, there
is still some remaining. For this reason, still expecting some
showers and a few storms to continue into the overnight as the
cold front approaches from the north and west and weak impulses
aloft move through the upper level flow. Locally heavy downpours
will be possible but any flooding should be largely of the
nuisance variety.

On Wednesday, the cold front will sag farther south and east and
depending on how quickly this clears our area there will be some
showers and thunderstorms, especially as additional shortwaves move
through the flow within the upper-level trough overhead. This looks
to be more concentrated across southern New Jersey to Delmarva but
could extend into the I-95 corridor for a time. There is some severe
weather risk mainly south/east of the I-95 corridor with locally
damaging wind gusts the main threat. The greater instability and
shear looks to reside across Delmarva on southward, where a little
higher severe thunderstorm risk is indicated. Some locally excessive
rainfall is possible with some local flash flood risk, however this
looks to be less compared to today given the shift farther south and
more into the coastal plain. Once the front moves away by later
Wednesday, it turns drier for Thursday/Friday and right into the
weekend.

&&

.AVIATION /02Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Tonight...Still some showers and thunderstorms around this
evening mainly from around Philly southward. In any of these
showers conditions may still drop to MVFR or even IFR...best
chances for this at MIV and ACY. Otherwise, widespread showers
diminish by the overnight period with MVFR cigs likely affecting
most sites by around the 04-07z time frame. Winds generally
southwest 10 to 15 knots but locally strong and variable winds
possible in any storms.

Wednesday...Once morning clouds clear by around 14Z, should
have prevailing VFR conditions. However, temporary MVFR or even
IFR conditions will be possible with showers and storms. The
highest risk of showers and storms is at KACY, but it is
possible the storms will be south of all TAF sites. Southwest
winds around 10 KT with some gusts of 15-20 knots possible.
Moderate confidence.

Outlook...

Thursday through Saturday...VFR.

&&

.MARINE...
Small Craft Advisory conditions for all coastal waters through
Wednesday evening. SCA conditions do subside though overnight
on Delaware Bay. Gusty thunderstorms probable into tonight.

Outlook...

Wednesday...Small Craft Advisory remains in effect for the ocean
zones.

Thursday through Saturday...The conditions are anticipated to be
below Small Craft Advisory criteria.

Rip Currents...

For Wednesday, winds turn more southwesterly but still 10-20
mph. However, breaking wave heights are expected to increase,
with breaking waves in the surf zone as high as 5 feet possible.
Still a 7 second period though which will mitigate the rip
current threat some. However, will continue with a MODERATE risk
for the development of dangerous rip currents at all beaches.

For Thursday, winds come around to the northeast and will generally
be 15 to 20 mph. Breaking waves are expected to be around 2-4 feet
with a 7 second period. With the onshore component of the wind and
multiple swell groups expected, expecting a MODERATE risk for the
development of dangerous rip currents at all beaches.

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

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 6 AM EDT Wednesday for ANZ430-431.
     Small Craft Advisory until 2 AM EDT Thursday for ANZ450>455.

&&

DISCUSSION...Fitzsimmons/Gorse/MJL
AVIATION...Fitzsimmons/Gorse/Johnson
MARINE...Gorse/Hoeflich/MJL

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
429 AM EDT Tue Jul 21 2026

MDZ012-015-019-020-220900-
Kent MD-Queen Annes-Talbot-Caroline-
429 AM EDT Tue Jul 21 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Severe thunderstorms with damaging winds and hail are possible this
afternoon and evening. Localized flash flooding is possible this
afternoon and tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Some severe thunderstorms with damaging winds are possible Wednesday.
Localized flash flooding is possible on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

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Preliminary Local Storm Report
National Weather Service Mount Holly NJ
828 PM EDT Tue Jul 21 2026

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

0355 PM     Tstm Wnd Dmg     2 W Blakeslee           41.09N 75.64W
07/21/2026                   Carbon             PA   911 Call Center

            Tree down on wires in Lake Harmony. Time
            estimated from radar.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
831 PM EDT Tue Jul 21 2026

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

0419 PM     Tstm Wnd Dmg     Price Twp               41.15N 75.22W
07/21/2026                   Monroe             PA   911 Call Center

            Trees down on wires. Time estimated from
            radar.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
910 PM EDT Tue Jul 21 2026

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

0452 PM     Tstm Wnd Dmg     Montgomery Twp          40.46N 74.66W
07/21/2026                   Somerset           NJ   911 Call Center

            Trees and wires down. Time given in report.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
928 PM EDT Tue Jul 21 2026

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

0709 PM     Tstm Wnd Dmg     Stafford Twp            39.70N 74.28W
07/21/2026                   Ocean              NJ   911 Call Center

            Tree down in Stafford Twp. Time estimated
            from radar.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1121 PM EDT Tue Jul 21 2026

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

1104 PM     Flash Flood      1 NNW North Wildwood    39.02N 74.80W
07/21/2026                   Cape May           NJ   Dept of Highways

            Flooding on NJ 147 Both Directions West of W
            Anglesea Dr (Middle Twp), All lanes closed
            eastbound; All lanes closed westbound.

&&

ZC