Severe Thunderstorm Warning 238, NWS Philadelphia/Mount Holly

625 
WWUS51 KPHI 272127
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
527 PM EDT Mon Jul 27 2026

NJC023-272145-
/O.CON.KPHI.SV.W.0238.000000T0000Z-260727T2145Z/
Middlesex NJ-
527 PM EDT Mon Jul 27 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN MIDDLESEX COUNTY...

At 527 PM EDT, a severe thunderstorm was located over Plainfield, and
is nearly stationary.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Colonia, Society Hill, Woodbridge, South Plainfield, Metuchen,
Dunellen, Iselin, and Fords.

This includes the following highways...
 New Jersey Turnpike near exit 12.
 Interstate 287 in New Jersey between mile markers 3 and 8.
 Garden State Parkway between mile markers 130 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4053 7449 4060 7446 4061 7432 4059 7430
      4054 7428
TIME...MOT...LOC 2127Z 179DEG 4KT 4061 7439 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guzzo

Area Forecast Discussion
National Weather Service Mount Holly NJ
255 PM EDT Mon Jul 27 2026

.WHAT HAS CHANGED...
Flood Watch issued.

All groups have been updated.

&&

.KEY MESSAGES...
1. Scattered showers and thunderstorms will continue into the
early overnight period tonight.

2. A Flood Watch has been issued for Tuesday into Wednesday as
an impactful system arrives across the region.

&&

.DISCUSSION...
KEY MESSAGE 1... Scattered showers and thunderstorms will
continue into the early overnight period tonight.

Scattered showers and thunderstorms have developed across the
northern Middle Atlantic region this afternoon as increasing
heat and moisture have arrived along with a few upper short
waves. We are not expecting widespread severe weather, but with
the possibility of strong downpours and some damaging winds
could occur in a few spots, the Marginal risk for severe storms
remains across our area for that reason.

The storms will be slow moving, so localized flooding is possible
through the tonight period as well. A slight risk for excessive
rainfall remains for Delaware tonight. The activity is expected
to decrease after sunset.

KEY MESSAGE 2... A Flood Watch has been issued for Tuesday into
Wednesday as an impactful system arrives across the region.

As the upper heights continue to drop and summertime warmth and
humidity continue...Tuesday looks to feature the more widespread
showers and thunderstorms. The H5 height falls and jet dynamics
aloft will favor convective development nearly all day as
surface low pressure develops just to our west. This will keep a
steady stream of warm, moist air pumping into the area and
keeping the environment conditionally unstable despite cloud
cover. PWats will rise to near 2" by the end of the day. Some
models suggest we could have a stalled or slow moving frontal
boundary across the central or northern portion of the forecast
area, which could act as a focusing mechanism for heavy rainfall.
Heavy rain leading to flash flooding could end up being a bigger
concern and greater impact than the severe thunderstorm threat.

The latest outlooks from WPC show most of our area in a SLIGHT
risk for excessive rainfall, but northern NJ has a MODERATE risk
for excessive. A flash flood watch has been issued for Tuesday
and into Wednesday. As for severe weather, the southern half of
the area including Delmarva, south NJ and metro Philadelphia
have a SLIGHT risk for severe thunderstorms while areas to the
north are in a MARGINAL risk. Damaging winds are the primary
threat with thunderstorms on Tuesday.

The low pressure looks to be offshore to our east by Wednesday.
There is some uncertainty with regards to how fast its effects
diminish across the area. We'll continue with scattered showers
and storms again by afternoon, at least across our NJ and PA
zones, but the severe thunderstorm threat will be lower given
lower instability. Flash flooding is possible Wednesday too.

&&

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

Tonight... Overall VFR, but scattered showers or tstms around
with short periods of IFR if the rains/tstms arrive across a
terminal. Low confid for placement/timing. Patchy fog possible
late for areas that receive rains this evening. Light W/SW
winds.

Tuesday through Tuesday Night...Periods of MVFR/IFR conditions
likely with multiple rounds of showers and thunderstorms expected.

Outlook...

Wednesday through Wednesday Night...Restrictions possible with
lingering showers and low clouds.

Thursday through Saturday...VFR. No significant weather expected.

&&

.MARINE...
Sub-SCA conditions expected through tomorrow morning with southerly
winds around 10-15 kt and seas 2 to 3 feet. Scattered showers
and tstms into the early overnight period tonight.

Outlook...

Tuesday Afternoon through Tuesday Night...A Small Craft Advisory
is in effect for all marine zones as south/southwest winds
around 20-25 kt and seas of 3 to 5 feet are expected. Showers
ans tstms expected.

Wednesday through Wednesday Night...SCA conditions possible (40-50%)
especially on the northern waters as seas near 5 feet.

Thursday through Friday...No marine headlines expected.

Rip Currents...

For the rest of today, an 8 second period and breaking waves 2
feet or less along with shore parallel winds up to 10 MPH will
result in a LOW risk for rip currents at all beaches.

For Tuesday, southerly flow strengthens with winds increasing to
around 15-20 MPH with either a shore parallel or onshore flow
component to a southerly wind. Multiple swell groups and increasing
breaking waves to around 2 to 3 feet as well as the coming full
moon will also add to the rip current threat. As a result, there
is a MODERATE risk for rip currents at all beaches.

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

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flood Watch from Tuesday morning through Wednesday afternoon
     for PAZ054-055-060>062-070-071-101>106.
NJ...Flood Watch from Tuesday morning through Wednesday afternoon
     for NJZ001-007>010-012>020-026-027.
DE...Flood Watch from Tuesday morning through Wednesday afternoon
     for DEZ001.
MD...None.
MARINE...Small Craft Advisory from noon to 8 PM EDT Tuesday for ANZ430-
     431.
     Small Craft Advisory from noon Tuesday to 6 AM EDT Wednesday
     for ANZ450>455.

&&

DISCUSSION...AKL/OHara/Hoeflich
AVIATION...AKL/OHara
MARINE...AKL/OHara

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
506 AM EDT Mon Jul 27 2026

MDZ012-015-019-020-280915-
Kent MD-Queen Annes-Talbot-Caroline-
506 AM EDT Mon Jul 27 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Marginal Risk for severe thunderstorms this afternoon and evening
with damaging winds being the main threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Slight Risk for severe thunderstorms for the Eastern Shore tomorrow.
Damaging wind gusts are the primary threat. Marginal Risk for flash
flooding as well.

.SPOTTER INFORMATION STATEMENT...

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

Hoeflich

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
223 PM EDT Mon Jul 27 2026

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

0210 PM     Hail             Bayville                39.91N 74.15W
07/27/2026  M0.25 Inch       Ocean              NJ   Trained Spotter

&&

Gorse

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
436 PM EDT Mon Jul 27 2026

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

0412 PM     Hail             1 NE Washington Crossin 40.31N 74.85W
07/27/2026  M1.00 Inch       Mercer             NJ   Public

            Report from mPING: Quarter (1.00 in.).

&&

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
447 PM EDT Mon Jul 27 2026

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

0348 PM     Hail             Chestnut Hill           40.08N 75.21W
07/27/2026  M0.50 Inch       Philadelphia       PA   Trained Spotter

            0.25 to 0.50 inch hail reported in Chestnut
            Hill. Winds estimated around 40 mph.

&&