Severe Thunderstorm Warning 110, NWS Philadelphia/Mount Holly

079 
WWUS51 KPHI 032107
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
507 PM EDT Fri Jul 3 2026

NJC037-032116-
/O.CAN.KPHI.SV.W.0110.000000T0000Z-260703T2130Z/
Sussex NJ-
507 PM EDT Fri Jul 3 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SUSSEX COUNTY IS
CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern New Jersey.

LAT...LON 4090 7462 4104 7450 4105 7450 4105 7448
      4101 7437 4097 7428 4092 7429 4090 7427
      4091 7434 4086 7432 4082 7434 4079 7437
      4076 7438 4075 7436 4073 7438
TIME...MOT...LOC 2106Z 302DEG 15KT 4094 7448 

$$

NJC027-032130-
/O.CON.KPHI.SV.W.0110.000000T0000Z-260703T2130Z/
Morris NJ-
507 PM EDT Fri Jul 3 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN MORRIS COUNTY...

At 506 PM EDT, a severe thunderstorm was located over Lake Telemark,
or 9 miles north of Morristown, moving southeast at 15 mph.

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

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Morristown, Dover, Madison, Florham Park, East Hanover, Lincoln Park,
Kinnelon, Chatham, Boonton, Butler, Wharton, Rockaway, Morris Plains,
Mountain Lakes, Victory Gardens, Parsippany, Pequannock Township,
Lake Telemark, Green Pond, and White Meadow Lake.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 32 and 49.
 Interstate 287 in New Jersey between mile markers 37 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

&&

LAT...LON 4090 7462 4104 7450 4105 7450 4105 7448
      4101 7437 4097 7428 4092 7429 4090 7427
      4091 7434 4086 7432 4082 7434 4079 7437
      4076 7438 4075 7436 4073 7438
TIME...MOT...LOC 2106Z 302DEG 15KT 4094 7448 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

056 
WWUS51 KPHI 032121
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
521 PM EDT Fri Jul 3 2026

NJC027-032131-
/O.EXP.KPHI.SV.W.0110.000000T0000Z-260703T2130Z/
Morris NJ-
521 PM EDT Fri Jul 3 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS COUNTY
WILL EXPIRE AT 530 PM EDT...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern New Jersey.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4090 7462 4104 7450 4105 7450 4105 7448
      4101 7437 4097 7428 4092 7429 4090 7427
      4091 7434 4086 7432 4082 7434 4079 7437
      4076 7438 4075 7436 4073 7438
TIME...MOT...LOC 2121Z 306DEG 20KT 4089 7440 

$$

MPS

Area Forecast Discussion
National Weather Service Mount Holly NJ
342 PM EDT Fri Jul 3 2026

.WHAT HAS CHANGED...
Severe Thunderstorm Watch #448 is now in effect for the
southern Poconos, Lehigh and Delaware Valleys including
Philadelphia, and all but extreme southeast New Jersey until 11
pm.

Confidence has increased in potential flash flooding impacts
across portions of the area on Sunday and Monday. Otherwise, the
forecast remains in track.

&&

.KEY MESSAGES...
1. Dangerous heat and humidity will continue across the region
through Saturday. All time record high temperatures could be
challenged again today with widespread triple digit
temperatures.

2. Daily chances for showers and storms will begin across the
area today and continue into early next week. Some severe storms
are possible each day through Sunday. There is a risk of flash
flooding Sunday and Monday.

&&

.DISCUSSION...
KEY MESSAGE 1...Dangerous heat and humidity will continue
across the region through Saturday. All time record high
temperatures could be challenged again today with widespread
triple digit temperatures.

Strong mid-level ridging across the Mississippi Valley, Great
Lakes, and Ohio Valleys has built eastward into the Northeast
and Mid Atlantic and will persist into the holiday weekend. The
flow is west to northwest today. The ridge will finally start to
break and retreat some starting Saturday, and especially into
Sunday.

Temperatures will begin to abate somewhat on Saturday as the
ridge begins to break and retreat to the southwest. However,
high temperatures will still be in the mid 90s to around 100
degrees, hottest along and southeast of I-95. Another day of
west to northwest flow of similar magnitude should once again
support the immediate coastline warming up considerably before
the sea breeze develops. Elsewhere, a gradually weakening ridge
aloft will result in the slightly cooler temperatures. Dewpoints
should mix out again into the upper 60s to near 70 degrees by
afternoon, which results in 100-108 degree heat indices.

Notably cooler temperatures are expected across the region on
Sunday, with high temperatures generally in the upper 80s across
most of eastern PA and NJ, and low 90s for the urban corridor
as well as Delmarva. With that said, dewpoints will remain in
the upper 60s to low 70s, with heat indices getting into the mid
90s to low 100s from the Philly metro and south. By Monday,
with a frontal boundary draped across the area, much cooler
temperatures are expected. Placement of the front is uncertain,
but north of the front temperatures will likely only be in the
mid 70s, and low to mid 80s to the south. South of the front
where temperatures are still fairly warm, the forecast remains
complicated by the potential for widespread showers and storms.

Significant impacts will continue from the 3 to 4 day excessive
heat and humidity, with heat indices reaching into the 100-110
degree range each day. The Extreme Heat Warning for our entire
forecast area (excluding the New Jersey barrier islands) remains
in effect through 8 PM Saturday. The hottest conditions are
forecast to occur through today south of I-78. While heat
indices may fall just shy of warning criteria by Saturday,
impacts will likely be worsened by the multiple days of heat and
busy outdoor holiday festivities.

KEY MESSAGE 2...Daily chances for showers and storms will begin
across the area today and continue into early next week. Some
severe storms are possible each day through Sunday. There is a
risk of flash flooding Sunday and Monday.

Severe Thunderstorm Watch #448 is now in effect for the
southern Poconos, Lehigh and Delaware Valleys including
Philadelphia, and all but extreme southeast New Jersey until 11
pm.

The mid-level ridge looks to break down and retrograde back to
the south and west starting later today, and this will allow a
mid- level trough to dig southeastward into New England. With
several shortwaves riding over the top of the ridge and into the
local area, this will support increasing coverage of afternoon
and evening showers and thunderstorms starting late this
afternoon, but especially on Saturday and Sunday as a cold front
enters the region and then likely stalls. Currently, PoPs are
around 20-30% this afternoon and evening and generally 30-60% on
Saturday. Activity becomes more widespread on Sunday and
Monday, with PoPs around 60- 90% for most of the area.

SPC has highlighted portions of our area in a Slight Risk
(level 2 out of 5) for severe thunderstorms today, Saturday, and
Sunday. As indicated by the PoP forecast above, coverage of
storms is anticipated to be relatively low today, mainly
isolated to scattered in nature at best. Coverage and
organization of storms should be a bit greater on Saturday
though. Damaging winds will be the main threat with any
thunderstorm development.

While there is still some uncertainty in the details of the
thunderstorm activity Friday and Saturday, it is important to
point out that any holiday weekend festivities could be impacted
by thunderstorms (in addition to the extreme heat).

On Sunday, the severe weather threat is expected to become
confined to mainly the Philly metro and points south, but this
will be dependent on frontal placement. However, widespread
showers and storms are also expected north of the front. The
severe weather threat looks low on Monday, but additional rounds
of showers and storms appear likely through Monday night.

Concern has grown this afternoon that a threat for flash
flooding could evolve Sunday into Monday, given a slow moving or
stationary frontal boundary draped across the area, and tall,
skinny CAPE profiles with deep moisture. In fact, model guidance
is indicating PWATs potentially exceeding 2 inches, which is
above the 90th percentile for this time of year and near the
daily observed maximum. Given these factors, rainfall rates in
storms could exceed 1 to 2 inches per hour. As of now, the WPC
has placed a Slight Risk (2 of 4) for the I-95 corridor and
points west both Sunday and Monday, with a Marginal Risk (1 of
4) for the remainder of the area.

The front is expected to finally clear the area Tuesday, with
high pressure at least briefly building back into the region.
However, daily chances for isolated, primarily diurnally driven
convection, could continue through the middle of next week.

&&

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

This evening...VFR. Generally westerly winds around 10 kts with
some gusts up near 20 kts. Very low risk of isolated
thunderstorms after 21Z (about 20-30% chance), but for now kept
it as just VCTS. High confidence overall.

Overnight...VFR. West winds near 5 kts. High confidence.

Saturday...VFR overall. Risk of scattered showers/t-storms after
18Z (about 30-50% chance). Winds generally westerly increasing
to 10 kts with some afternoon gusts up to 20 kts. Moderate
confidence.

Outlook...

Saturday night...Scattered showers and storms will be possible,
especially during the evening showers. Sub-VFR conditions are
likely with any heavier showers or storms.

Sunday through Monday night...Scattered to widespread showers
and thunderstorms with sub-VFR conditions expected at times.

Tuesday through Wednesday...Primarily VFR. Isolated to
scattered showers and storms will be possible, especially in the
afternoon hours each day, which could lead to brief periods of
sub-VFR conditions.

&&

.MARINE...
No marine hazards expected through Saturday. South to southwest
winds 10-15 kts. Seas 1-3 feet. 10-20% chance of a
thunderstorm tonight, 20-40% Saturday afternoon, otherwise fair
weather and hazy.

Outlook...

No marine headlines are currently anticipated through Wednesday
with winds below 25 kt and seas below 5 feet. Showers and
storms are possible each day, with activity being the most
widespread Sunday through Monday night. Visibility restrictions
and strong winds are possible with the strongest storms.

Rip Currents...

For today, winds will start from the northwest at around 10
mph, then will turn to the southwest at 10 to 15 mph with gusts
up to 20 mph in the afternoon. Breaking waves will be 1 to 2
feet. There will be a light southerly swell with a period around
6 seconds. This results in a LOW risk for the development of
dangerous and life threatening rip currents at the Jersey Shore
and at Delaware Beaches.

On Saturday, winds will be from the west to southwest at 10 to
15 mph with gusts up to 20 mph in the afternoon. Breaking waves
will be around 1 foot or less. There will be a light southeast
swell with a period around 6 seconds. This results in a LOW risk
for the development of dangerous and life threatening rip
currents at the Jersey Shore and at Delaware Beaches.

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

&&

.CLIMATE...
Record breaking heat is forecast through Saturday. On Thursday,
July 2nd, daily records were tied or broken at the Atlantic
City Airport, Mount Pocono, Philadelphia, Reading, Trenton,
Wilmington, and Georgetown. Temperature records for our climate
sites are listed below:

All Time Record High Temperatures

Site                  Record / Date
Allentown (ABE)          105 / July 3, 1966
AC Airport (ACY)         106 / June 28, 1969
AC Marina (55N)          104 / August 7, 1918
Georgetown (GED)         104 / July 22 & 23, 2011
Mount Pocono (MPO)       103 / July 3, 1911
Philadelphia (PHL)       106 / August 7, 1918
Reading (RDG)            106 / July 22, 2011
Trenton (TTN)            106 / July 9, 1936 & July 22, 2011
Wilmington (ILG)         107 / August 7, 1918

All Time Record Warmest Low Temperatures

Site                  Record / Date
Allentown (ABE)           79 / July 15, 1995
AC Airport (ACY)          84 / July 23, 2011
AC Marina (55N)           82 / July 21, 2019
Georgetown (GED)          84 / July 23, 2011
Mount Pocono (MPO)        76 / July 12, 1952
Philadelphia (PHL)        83 / July 24, 2010 & July 23, 2011
Reading (RDG)             81 / August 7, 1918
Trenton (TTN)             84 / August 11, 1895
Wilmington (ILG)          84 / August 7, 1918

Record Number of Consecutive 100+ Degree Days

Site                  Record / Date
Allentown (ABE)       3 days / July 9-11, 1936 & July 2-4, 1966
AC Airport (ACY)      3 days / July 2-4, 1966 & July 22-24, 2011
AC Marina (55N)        1 day / Occurred multiple times
Georgetown (GED)      2 days / Most recent June 24-25, 2025
Mount Pocono (MPO)     1 day / July 3, 1911
Philadelphia (PHL)    3 days / July 2-4, 1966 & July 8-10, 1993
Reading (RDG)         3 days / Most recent July 21-23, 2011
Trenton (TTN)         3 days / Most recent July 21-23, 2011
Wilmington (ILG)      3 days / Most recent July 9-11, 1936

Record High Temperatures
                          July 3
Site                  Record / Year
Allentown (ABE)          105 / 1966
AC Airport (ACY)         104 / 1966
AC Marina (55N)           99 / 1919
Georgetown (GED)         101 / 1954
Mount Pocono (MPO)       103 / 1911
Philadelphia (PHL)       104 / 1966
Reading (RDG)            103 / 1898 & 1966
Trenton (TTN)            102 / 1966
Wilmington (ILG)         102 / 1966

Record Warmest Low Temperatures
                          July 3
Site                  Record / Year
Allentown (ABE)           75 / 2018
AC Airport (ACY)          78 / 2018
AC Marina (55N)           76 / 1983, 2002, & 2018
Georgetown (GED)          79 / 1953
Mount Pocono (MPO)        69 / 2013
Philadelphia (PHL)        77 / 1876, 1901, &2002
Reading (RDG)             76 / 2018
Trenton (TTN)             76 / 1901 & 1966
Wilmington (ILG)          76 / 2002

Record High Temperatures
                          July 4
Site                  Record / Year
Allentown (ABE)          102 / 1949
AC Airport (ACY)         102 / 1966
AC Marina (55N)           99 / 1966
Georgetown (GED)         100 / 1966
Mount Pocono (MPO)        99 / 1911
Philadelphia (PHL)       103 / 1966
Reading (RDG)            100 / 1911 & 1966
Trenton (TTN)             99 / 1919, 1999, & 2010
Wilmington (ILG)         102 / 1966

Record Warmest Low Temperatures
                          July 4
Site                  Record / Year
Allentown (ABE)           75 / 1999
AC Airport (ACY)          75 / 1974, 1983, 1999, & 2002
AC Marina (55N)           79 / 2002
Georgetown (GED)          75 / 1999 & 2012
Mount Pocono (MPO)        70 / 2002 & 2013
Philadelphia (PHL)        79 / 1919
Reading (RDG)             78 / 1966
Trenton (TTN)             78 / 1966
Wilmington (ILG)          76 / 1999

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Extreme Heat Warning until 8 PM EDT Saturday for PAZ054-055-
     060>062-070-071-101>106.
NJ...Extreme Heat Warning until 8 PM EDT Saturday for NJZ001-
     007>010-012>023-027.
     Heat Advisory until 8 PM EDT Saturday for NJZ024>026.
DE...Extreme Heat Warning until 8 PM EDT Saturday for DEZ001>004.
MD...Extreme Heat Warning until 8 PM EDT Saturday for MDZ012-015-
     019-020.
MARINE...None.

&&

DISCUSSION...Cooper/MPS/RCM/Staarmann
AVIATION...Cooper/RCM
MARINE...Cooper/MPS/RCM

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
506 AM EDT Fri Jul 3 2026

MDZ012-015-019-020-040915-
Kent MD-Queen Annes-Talbot-Caroline-
506 AM EDT Fri Jul 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM EDT SATURDAY...

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Extreme Heat Warning.

In addition to the extreme heat, isolated severe thunderstorms are
possible after late this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Extreme Heat Warning.

In addition to the extreme heat, scattered severe thunderstorms are
possible Saturday and Sunday.

.SPOTTER INFORMATION STATEMENT...

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

Staarmann