Alert archive / New Jersey / Heat Advisories in 2024

Heat Advisory 3, NWS Philadelphia/Mount Holly

June 28, 20244 states

NWS Philadelphia/Mount Holly issued this heat advisory at Jun 28, 2024, 2:33 PM EDT for 4 states. It took effect at Jun 30, 2024, 10:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jun 28, 2024, 2:33 PM EDT (18:33 UTC)
In effect from
Jun 30, 2024, 10:00 AM EDT
Expired
Jun 30, 2024, 7:00 PM EDT
In force
9 hr
Issued by
NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 18:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.6 hours before the alert went out and 211 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2024-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2024-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1204 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

911 
WWUS71 KPHI 281833
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
233 PM EDT Fri Jun 28 2024

DEZ001-NJZ015-017>020-027-PAZ070-071-102-104-106-291015-
/O.NEW.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of Doylestown, Glassboro, Lansdale,
Morrisville, Trenton, West Chester, Wharton State Forest, Cherry
Hill, Moorestown, Mount Holly, Camden, Norristown, Kennett
Square, Philadelphia, Wilmington, Jackson, and Media
233 PM EDT Fri Jun 28 2024

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 102 expected.

* WHERE...Portions of northern Delaware, central and southern New 
  Jersey, and southeast Pennsylvania.

* WHEN...From 11 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Monitor the latest forecasts and warnings for updates.

&&

$$

MPS
5 follow-up statements
587 
WWUS71 KPHI 290651
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
251 AM EDT Sat Jun 29 2024

NJZ010-012-013-292000-
/O.EXA.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
Somerset-Middlesex-Western Monmouth-
Including the cities of Somerville, New Brunswick, and Freehold
251 AM EDT Sat Jun 29 2024

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 100 expected.

* WHERE...Western Monmouth, Middlesex, and Somerset Counties.

* WHEN...From 11 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

* ADDITIONAL DETAILS...Some showers and thunderstorms especially 
  during Sunday afternoon will provide local relief from the heat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

DEZ001-NJZ015-017>020-027-PAZ070-071-102-104-106-292000-
/O.CON.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of Kennett Square, Trenton, West Chester,
Mount Holly, Doylestown, Cherry Hill, Jackson, Philadelphia,
Camden, Moorestown, Glassboro, Wilmington, Wharton State Forest,
Morrisville, Norristown, Media, and Lansdale
251 AM EDT Sat Jun 29 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 102 expected.

* WHERE...Portions of northern Delaware, central and southern New 
  Jersey, and southeast Pennsylvania.

* WHEN...From 11 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

* ADDITIONAL DETAILS...Some showers and thunderstorms especially 
  during Sunday afternoon will provide local relief from the heat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

Gorse
679 
WWUS71 KPHI 291834
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
234 PM EDT Sat Jun 29 2024

MDZ012-015-019-020-301000-
/O.EXB.KPHI.HT.Y.0003.240630T1400Z-240630T2300Z/
Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Chestertown, Centreville, Easton, and
Denton
234 PM EDT Sat Jun 29 2024

...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 107 expected.

* WHERE...Caroline, Kent MD, Queen Annes, and Talbot Counties.

* WHEN...From 10 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

&&

$$

DEZ001-NJZ015-017>020-027-PAZ070-071-102-104-106-301000-
/O.CON.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of Wilmington, Mount Holly, Wharton State
Forest, Kennett Square, Doylestown, Cherry Hill, Camden, Jackson,
Morrisville, Philadelphia, Trenton, Glassboro, West Chester,
Media, Moorestown, Lansdale, and Norristown
234 PM EDT Sat Jun 29 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 103 expected.

* WHERE...Portions of northern Delaware, central and southern New 
  Jersey, and southeast Pennsylvania.

* WHEN...From 11 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

NJZ010-012-013-301000-
/O.CON.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
Somerset-Middlesex-Western Monmouth-
Including the cities of Somerville, Freehold, and New Brunswick
234 PM EDT Sat Jun 29 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY...

* WHAT...Heat index values up to 102 expected.

* WHERE...Western Monmouth, Middlesex, and Somerset Counties.

* WHEN...From 11 AM to 7 PM EDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

MPS
946 
WWUS71 KPHI 300811
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
411 AM EDT Sun Jun 30 2024

MDZ012-015-019-020-302300-
/O.CON.KPHI.HT.Y.0003.240630T1400Z-240630T2300Z/
Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Centreville, Chestertown, Easton, and
Denton
411 AM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM 
EDT THIS EVENING...

* WHAT...Heat index values up to 105 expected.

* WHERE...Caroline, Kent MD, Queen Annes, and Talbot Counties.

* WHEN...From 10 AM this morning to 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

DEZ001-NJZ015-017>020-027-PAZ070-071-102-104-106-302300-
/O.CON.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of Wilmington, Media, Cherry Hill, Mount
Holly, Kennett Square, Lansdale, Moorestown, West Chester,
Wharton State Forest, Trenton, Glassboro, Morrisville,
Doylestown, Philadelphia, Camden, Jackson, and Norristown
411 AM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM 
EDT THIS EVENING...

* WHAT...Heat index values up to 103 expected.

* WHERE...Portions of northern Delaware, central and southern New 
  Jersey, and southeast Pennsylvania.

* WHEN...From 11 AM this morning to 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

NJZ010-012-013-302300-
/O.CON.KPHI.HT.Y.0003.240630T1500Z-240630T2300Z/
Somerset-Middlesex-Western Monmouth-
Including the cities of Freehold, New Brunswick, and Somerville
411 AM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM 
EDT THIS EVENING...

* WHAT...Heat index values up to 102 expected.

* WHERE...Western Monmouth, Middlesex, and Somerset Counties.

* WHEN...From 11 AM this morning to 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

Gorse
814 
WWUS71 KPHI 301916
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
316 PM EDT Sun Jun 30 2024

DEZ001-NJZ015-017>020-027-PAZ070-071-102-104-106-302300-
/O.CON.KPHI.HT.Y.0003.000000T0000Z-240630T2300Z/
New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of Wharton State Forest, Norristown, West
Chester, Mount Holly, Moorestown, Trenton, Cherry Hill, Kennett
Square, Lansdale, Camden, Philadelphia, Doylestown, Glassboro,
Jackson, Morrisville, Wilmington, and Media
316 PM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...

* WHAT...Heat index values up to 97.

* WHERE...Portions of northern Delaware, central and southern New 
  Jersey, and southeast Pennsylvania.

* WHEN...Until 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

MDZ012-015-019-020-302300-
/O.CON.KPHI.HT.Y.0003.000000T0000Z-240630T2300Z/
Kent MD-Queen Annes-Talbot-Caroline-
Including the cities of Easton, Chestertown, Denton, and
Centreville
316 PM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...

* WHAT...Heat index values up to 105.

* WHERE...Caroline, Kent MD, Queen Annes, and Talbot Counties.

* WHEN...Until 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

NJZ010-012-013-302300-
/O.CON.KPHI.HT.Y.0003.000000T0000Z-240630T2300Z/
Somerset-Middlesex-Western Monmouth-
Including the cities of Freehold, Somerville, and New Brunswick
316 PM EDT Sun Jun 30 2024

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...

* WHAT...Heat index values up to 100.

* WHERE...Western Monmouth, Middlesex, and Somerset Counties.

* WHEN...Until 7 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of 
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose 
fitting clothing. Try to limit strenuous activities to early morning 
or evening. Take action when you see symptoms of heat exhaustion and 
heat stroke.

&&

$$

MPS
950 
WWUS71 KPHI 302251
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
651 PM EDT Sun Jun 30 2024

DEZ001-MDZ012-015-019-020-NJZ010-012-013-015-017>020-027-PAZ070-071-
102-104-106-010000-
/O.EXP.KPHI.HT.Y.0003.000000T0000Z-240630T2300Z/
New Castle-Kent MD-Queen Annes-Talbot-Caroline-Somerset-Middlesex-
Western Monmouth-Mercer-Gloucester-Camden-Northwestern Burlington-
Ocean-Southeastern Burlington-Delaware-Philadelphia-Eastern
Chester-Eastern Montgomery-Lower Bucks-
Including the cities of Wharton State Forest, Chestertown,
Easton, Cherry Hill, Doylestown, Denton, Mount Holly, Kennett
Square, Lansdale, Philadelphia, Glassboro, New Brunswick,
Trenton, Camden, Jackson, Wilmington, Freehold, Media,
Centreville, Norristown, West Chester, Moorestown, Morrisville,
and Somerville
651 PM EDT Sun Jun 30 2024

...HEAT ADVISORY WILL EXPIRE AT 7 PM EDT THIS EVENING...

The threat has ended.

$$

MPS

What forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this heat advisory went out at Jun 28, 1:53 PM EDT, 40 minutes earlier.

Area forecast discussion, Jun 28, 1:53 PM EDT, 40 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
153 PM EDT Fri Jun 28 2024

.SYNOPSIS...
High pressure slides across our area today before sliding offshore
this evening. A warm front lifts north across our region later
Saturday, followed by a cold front later Sunday. High pressure
returns for Monday and Tuesday, then a cold front approaches during
Thursday.

&&

.NEAR TERM /THROUGH TONIGHT/...
Some minor adjustments were made to the hourly grids based on
the latest surface obs. Otherwise, pleasant conditions on tap
today. Only some high clouds are expected in a day that will be
dry and mostly sunny overall. Temperatures will be on the cooler
side for late June, topping out in the upper 70s to low 80s
across most of the region. Winds continue to turn southeast as
high pressure shifts eastward.

Heading into tonight, the high slides further eastward allowing a
surface low pressure system centered over the Great Lakes to begin
to approach the region. This movement will bring increasing clouds,
particularly after midnight. A stray shower can't be completely
ruled out during the pre-dawn hours. However, thanks to dry air
lingering in the low-mid levels, anything substantial looks to be
unlikely. PoPs were reduced to less than 15 percent as a result.
With cloud cover providing some insulation, lows look to be 5-10
degrees warmer tonight than early this morning, falling into the mid-
upper 60s.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...
A central Canadian upper-level trough is forecast to pivot eastward
and amplify southward some, with a stronger shortwave sliding across
the Great Lakes region during Saturday. This will support surface
low pressure tracking well to our north across portions of eastern
Canada, however its cold front will be approaching late Saturday
night. Much of the daytime Saturday looks to be rain-free as the
overall system looks to be slower. As a warm front lifts north
across our area later Saturday, there is some resemblance of a
surface trough developing near or east of the appalachians during
the afternoon. This may support some convection mainly across our
far western zones in the afternoon. Otherwise, the main convective
development looks to occur well to our west. During the day, highs
will be in the mid to upper 80s and with increasing southerly flow,
surface dew points will rise through the 60s and therefore
it becomes more humid.

Some showers and thunderstorms are forecast to be on the increase
during Saturday night as the mid level flow increases and stronger
large scale ascent starts to arrive. This should also be tied to
more organized convection approaching from the west. Despite this
occurring at night, instability should be sufficient for a while to
maintain convection. A ribbon of strong moisture advection is
forecast to increase the precipitable water values into the 2.0-2.5
inch range Saturday night, and this will result in enhanced rainfall
rates with any stronger convection. While convection should be on
the move, heavy rain can lead to some localized flooding. While the
bulk effective shear is forecast to be about 30-40 knots,
instability may be muted some given the nighttime occurrence and
this may limit the severe thunderstorm risk. If the boundary layer
remains very warm ahead of the convection, this would hold onto some
higher downdraft instability (DCAPE) and therefore locally strong
winds cannot be ruled out especially for our western zones. It will
be a very warm and muggy Saturday night with lows generally in the
70s.

As we go through Sunday, some showers and thunder may be ongoing to
start the morning however these should decrease for a time. Cloud
cover should give way to at least some sunshine for a time and
therefore a hot and humid day. High temperatures are expected to be
in the upper 80s to low 90s for much of the region. Surface dew
points are forecast to be in the 70s, however we will have to see if
these can mix out some during peak heating. The combination of the
very warm to hot temperatures and dew points in the 70s will yield
heat indices Sunday afternoon well into the 90s with some areas
around 100 degrees. While low pressure tracks well to our north, an
incoming upper-level trough will push a cold front across our region
later Sunday. Some additional showers and thunderstorms are forecast
to develop, however a pre-frontal trough may be far enough east to
focus most of the convective development along and south/east of the
I-95 corridor. Given the heat and high humidity in place, some
storms could become locally severe with damaging winds the main
hazard, especially as some model forecast soundings show an inverted-
V low-level profile which would increase the downdraft instability
(DCAPE). The precipitable water values may start to lower during the
day although this will depend on the progression of the trough and
cold front, however locally heavy rain will be possible with any
stronger convection. The timing of the cold front will also
determine the convective coverage as the guidance does vary some
with this timing. It will dry out Sunday night in the wake of the
cold front, and dew points will also be on the decrease by daybreak
Monday.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
Summary...Cooler and less humid to start then turning warm/hot and
more humid. Some convection possible, mainly Thursday.

Synoptic Overview...An upper-level trough is forecast to be shifting
to our east Monday, then a mid/upper level ridge arrives Tuesday
into Wednesday. Some influence from a Canadian upper-level trough
will start to glance our area during Thursday. At the surface, high
pressure builds in later Monday and Tuesday before shifting to our
south and east into Wednesday. A warm front lifts northward
Wednesday then a cold front approaches during Thursday.

For Monday and Tuesday...As an upper-level trough departs Monday, a
ridge arrives into Tuesday. A cooler and less humid air mass will be
ushered in under a north to northeast wind as surface high pressure
builds in. High temperatures Monday are forecast to be into the low
80s for many places, then with some warm air advection starting
highs Tuesday will be a few degrees warmer. The surface flow however
turns more southeast Tuesday resulting in some cooling along the
coast. A comfortable air mass both days with dew points in the 50s.

For Wednesday and Thursday...The ridge aloft is forecast to
gradually weaken and shift southward some and this will take surface
high pressure with it. A more south to southwest flow will become
established as a result, and this will also boost the warm air
advection. A warm front should also be lifting on by Wednesday with
a hotter air mass overspreading our region. The influence of a
Canadian upper-level trough will start to approach during Thursday,
however the timing and amplitude of this trough is less certain. As
of now, the main trough is more toward the Midwest and therefore a
cold front may be slow to arrive into our area. There may be a pre-
frontal trough in our vicinity and this may provide enough focus
amid a destabilizing air mass to initiate some convection. Given the
uncertainty at this time range, kept PoPs on the lower side
Thursday. High temperatures are forecast to rise into the low 90s
for many places Thursday and with dew points into the lower 70s,
hot and humid conditions are forecast.

&&

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

Rest of Today...VFR conditions continue. East winds 5-10 knots,
shift to southeast through this afternoon. Occasional gusts
15-20 knots. High confidence.

Tonight...VFR conditions for much of the night. MVFR ceilings
expected to develop late in the night and toward daybreak
Saturday. IFR conditions possible at RDG, ABE, ILG. Southeast
winds 5-10 knots. High confidence.

Saturday...MVFR, or IFR in a few spots, to start the day,
improving to VFR later in the morning into the afternoon.
Southeast winds 5-10 knots, become southerly through the morning
into the afternoon, with gusts 15-20 knots. High confidence
overall, moderate confidence on timing of improving conditions.

Outlook...

Saturday night and Sunday...VFR overall. Some showers and
thunderstorms mainly Saturday night and Sunday can result in
areas of sub-VFR conditions for a time.

Monday and Tuesday...VFR.

&&

.MARINE...
Through Tonight...Conditions are expected to remain below advisory
levels. Prevailing winds shift from the northeast this morning
to the southeast this afternoon. Seas of 2-4 feet throughout the
period.

Outlook...

Saturday and Sunday...Small Craft Advisory conditions possible. Some
thunderstorms Saturday night and especially Sunday may produce
locally strong winds.

Monday...Small Craft Advisory conditions possible, especially early.

Tuesday...The conditions are anticipated to be below Small Craft
Advisory criteria.

Rip Currents...

Today...Northeast winds in the morning becoming east-southeast
winds in the afternoon 10-20 mph. Breaking waves of 2-3 feet
for all beaches. Due to an onshore component of the wind, have
maintained a MODERATE risk for the development of dangerous rip
currents for the New Jersey and Delaware beaches.

Saturday...Southeast winds 10-20 mph with breaking waves of 2-3
feet at all beaches. Due to similar wind and wave conditions
compared to Friday, have opted to continue with a MODERATE risk
for the development of dangerous rip currents for both the New
Jersey and Delaware beaches.

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

&&

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

&&

SYNOPSIS...Gorse/MPS
NEAR TERM...AKL/MPS
SHORT TERM...Gorse
LONG TERM...Gorse
AVIATION...AKL/Gorse/Robertson
MARINE...AKL/DeSilva/Gorse

In the hours before

Local storm report, Jun 28, 11:56 AM EDT, 2 hours 37 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Mount Holly NJ
1156 AM EDT Fri Jun 28 2024

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

0622 PM     Tstm Wnd Dmg     1 NW Hamburg            40.57N 76.00W
06/26/2024                   Berks              PA   Broadcast Media

            Tree down on Port Clinton Ave with power
            lines down.

0626 PM     Tstm Wnd Dmg     Penn Twp                40.47N 76.07W
06/26/2024                   Berks              PA   Broadcast Media

            Wires down on Irish Creek Rd in Penn Twp.

0631 PM     Tstm Wnd Dmg     1 NNW Centre Twp        40.49N 76.03W
06/26/2024                   Berks              PA   Public

            Delayed report. Centre Twp: Shartlesville Rd
            & Trolly Rd - Tree & Wires Down. Time
            estimated.

0635 PM     Tstm Wnd Dmg     Jim Thorpe              40.87N 75.73W
06/26/2024                   Carbon             PA   Trained Spotter

            Delayed report. Numerous trees (some large)
            down throughout Jim Thorpe with road
            closures.

0635 PM     Tstm Wnd Dmg     Lehighton               40.83N 75.71W
06/26/2024                   Carbon             PA   911 Call Center

            Several trees down from Mahoning Township to
            Franklin Township. Time estimated from
            radar.

0640 PM     Tstm Wnd Gst     1 S Reading Regional Ai 40.37N 75.97W
06/26/2024  M45 MPH          Berks              PA   ASOS

            ASOS station KRDG Reading.

0643 PM     Tstm Wnd Dmg     3 NNE Mount Penn        40.36N 75.88W
06/26/2024                   Berks              PA   Broadcast Media

            Tree down near intersection of Angora Rd and
            Warner Rd in Lower Alsace Twp.

0645 PM     Tstm Wnd Dmg     Maiden Creek            40.45N 75.90W
06/26/2024                   Berks              PA   Trained Spotter

            Corrects previous non-tstm wnd dmg report
            from Maiden Creek. Large tree uprooted over
            a driveway.

0647 PM     Tstm Wnd Dmg     1 WSW Lake Harmony      41.05N 75.60W
06/26/2024                   Carbon             PA   NWS Storm Survey

            NWS storm survey conducted on wind damage in
            Kidder Township near Lake Harmony. Path of
            snapped and uprooted trees began on Chalet
            Court. Along Chalet Court and Lupine Drive
            from Chalet to Spring Street snapped and
            uprooted trees caused damage to nearby
            residences including damage to sheds and
            porch railings. Near the intersection of
            Lupine Drive and Spring Street, at least 10
            trees were either uprooted or snapped in a
            wooded lot. Additional trees were uprooted
            along Pineknoll Drive. More sporadic tree
            damage, including large limbs felled, was
            noted along the loop of Skye Drive.

0648 PM     Tstm Wnd Dmg     1 NNW Temple            40.43N 75.93W
06/26/2024                   Berks              PA   Broadcast Media

            Wires down across railroad tracks and on
            roadway near Leesport Ave and Snyder Rd in
            Ontelaunee Twp.

0651 PM     Tstm Wnd Dmg     Pocono Pines            41.12N 75.46W
06/26/2024                   Monroe             PA   Public

            Multiple trees down across roads in Pocono
            Pines. Time estimated.

0653 PM     Tstm Wnd Dmg     3 WSW Oley              40.38N 75.84W
06/26/2024                   Berks              PA   Broadcast Media

            Beckers Rd - Wires Down arching and sparking
            in Alsace Twp.

0658 PM     Tstm Wnd Gst     2 SSW East Allen Twp    40.67N 75.42W
06/26/2024  M58 MPH          Northampton        PA   Trained Spotter

            Trained spotter relays report of 58.1 mph
            wind gust on a calibrated vortex inspeed.

0659 PM     Tstm Wnd Gst     Lehigh Valley Internati 40.65N 75.45W
06/26/2024  M49 MPH          Lehigh             PA   ASOS

            ASOS station KABE Lehigh Valley Intl
            Airport.

0705 PM     Tstm Wnd Gst     Pocono Mountains Munici 41.13N 75.38W
06/26/2024  M52 MPH          Monroe             PA   ASOS

            ASOS station KMPO Mt. Pocono.

0705 PM     Tstm Wnd Dmg     1 NW Hokendauqua        40.67N 75.50W
06/26/2024                   Lehigh             PA   Trained Spotter

            Several large branches snapped off that are
            3-4 inches thick. No damage to structures.

0705 PM     Tstm Wnd Gst     Whitehall Twp           40.63N 75.47W
06/26/2024  M54 MPH          Lehigh             PA   Trained Spotter

            Trained spotter relays wind gust of 54 mph.

0706 PM     Tstm Wnd Gst     North Catasauqua        40.66N 75.48W
06/26/2024  M50 MPH          Northampton        PA   Trained Spotter

            Trained spotter relays 50 mph wind gust.
            Time estimated.

0709 PM     Tstm Wnd Dmg     2 SSE Lehigh Valley Int 40.63N 75.43W
06/26/2024                   Lehigh             PA   Public

            Large tree uprooted and lying across road on
            N Ulster Street. Time estimated.

0710 PM     Tstm Wnd Dmg     1 S Bethlehem           40.62N 75.38W
06/26/2024                   Northampton        PA   Trained Spotter

            Trees down across the road on Center Street
            in Bethlehem. Time estimated.

0710 PM     Tstm Wnd Dmg     1 ENE Fountain Hill     40.61N 75.38W
06/26/2024                   Northampton        PA   Trained Spotter

            Large tree branches down across Columbia
            Street in Bethlehem. Time estimated.

0710 PM     Tstm Wnd Gst     Forks Twp               40.73N 75.19W
06/26/2024  M59 MPH          Northampton        PA   Trained Spotter

            Trained spotter measures 59 mph wind gust.

0710 PM     Hail             Whitehall Twp           40.63N 75.47W
06/26/2024  M0.75 Inch       Lehigh             PA   Trained Spotter

            Multiple reports of approximately penny size
            hail near Whitehall Twp.

0711 PM     Tstm Wnd Dmg     Hellertown              40.58N 75.34W
06/26/2024                   Northampton        PA   Public

            Power lines and trees down in Hellertown.
            Time estimated.

0713 PM     Tstm Wnd Dmg     1 W Easton              40.69N 75.22W
06/26/2024                   Northampton        PA   Trained Spotter

            Large tree down on top of a garage and
            several cars near 8th and Wood Street. Time
            estimated.

0714 PM     Hail             1 NW Fountain Hill      40.62N 75.41W
06/26/2024  M0.75 Inch       Lehigh             PA   Trained Spotter

            Spotter Network Report of Dime to Penny Size
            hail.

0715 PM     Hail             2 W Bethlehem           40.64N 75.40W
06/26/2024  M0.50 Inch       Lehigh             PA   Public

            Report from mPING: Half-inch (0.50 in.).

0718 PM     Tstm Wnd Gst     Stewartsville           40.69N 75.11W
06/26/2024  M50 MPH          Warren             NJ   Trained Spotter

            Trained spotter relays 50 mph wind gust.
            Time estimated.

0721 PM     Tstm Wnd Dmg     Belvidere               40.83N 75.07W
06/26/2024                   Warren             NJ   Trained Spotter

            Reports of multiple wires down in and around
            Belvidere. Time estimated.

0729 PM     Tstm Wnd Dmg     2 S Liberty Twp         40.84N 74.95W
06/26/2024                   Warren             NJ   Dept of Highways

            NJ DOT - STMC: Downed tree on US 46
            westbound East of Pequest Hatchery (Liberty
            Twp) All lanes closed. Time estimated.

0730 PM     Tstm Wnd Dmg     Tewksbury Twp           40.71N 74.77W
06/26/2024                   Hunterdon          NJ   Trained Spotter

            Multiple trees down across Tewksbury. Time
            estimated from radar.

0735 PM     Tstm Wnd Dmg     Great Meadows           40.87N 74.91W
06/26/2024                   Warren             NJ   Public

            Pictures show several large tree limbs down,
            a few trees down with even one tree snapped.
            Time estimated from radar.

0735 PM     Tstm Wnd Dmg     Hackettstown            40.85N 74.83W
06/26/2024                   Warren             NJ   Trained Spotter

            Several trees down and a measured wind gust
            to 59 mph. Time estimated from radar.

0735 PM     Tstm Wnd Gst     2 S Liberty Twp         40.84N 74.95W
06/26/2024  M48 MPH          Warren             NJ   Mesonet

            NJWXNET Station NJ58 Pequest.

0736 PM     Tstm Wnd Dmg     Lebanon                 40.64N 74.84W
06/26/2024                   Hunterdon          NJ   Public

            Several trees down report around Lebanon.
            Time estimated.

0739 PM     Tstm Wnd Dmg     2 SW Hackettstown       40.84N 74.85W
06/26/2024                   Warren             NJ   Broadcast Media

            Trees, wires and power poles down on
            Rockport Road near Allen Road. Time
            estimated.

0743 PM     Hail             Flemington              40.51N 74.86W
06/26/2024  M0.75 Inch       Hunterdon          NJ   Public

            Time estimated from radar.

0744 PM     Tstm Wnd Dmg     3 NNE Readington        40.61N 74.72W
06/26/2024                   Somerset           NJ   Public

            Tree down across powerlines and on roadway
            along County Line Rd.

0746 PM     Tstm Wnd Dmg     Andover                 40.99N 74.74W
06/26/2024                   Sussex             NJ   Dept of Highways

            NJ DOT - STMC: Downed tree on US 206 both
            directions CR 517 (Andover Twp) All lanes
            closed. Time estimated.

0746 PM     Tstm Wnd Dmg     Frankford Twp           41.16N 74.74W
06/26/2024                   Sussex             NJ   Public

            Delayed report. Trees and power lines down
            around Frankford Twp. Time estimated.

0748 PM     Tstm Wnd Dmg     3 WSW Lyons             40.64N 74.60W
06/26/2024                   Somerset           NJ   Dept of Highways

            NJ DOT - STMC: Downed tree on I-78 eastbound
            West of Exit 33 - CR 525/Liberty Corner
            Rd/Martinsville (Bernards Twp) 1 Right lane
            of 4 lanes closed. Time estimated.

0751 PM     Tstm Wnd Dmg     Wantage Twp             41.24N 74.62W
06/26/2024                   Sussex             NJ   Dept of Highways

            NJ DOT - STMC: Downed tree and Downed wires
            on NJ 23 both directions North of Wantage
            School Rd (Wantage Twp) All lanes closed.
            Time estimated.

0752 PM     Tstm Wnd Dmg     1 NNW Basking Ridge     40.71N 74.56W
06/26/2024                   Somerset           NJ   Dept of Highways

            NJ DOT - STMC: Downed wires on I-287 both
            directions South of Exit 30 - North Maple
            Ave (Bernards Twp) All lanes closed.

0754 PM     Tstm Wnd Dmg     1 W Manville            40.55N 74.61W
06/26/2024                   Somerset           NJ   Trained Spotter

            Spotter Network: Multiple downed branches in
            yard. Branch diameters around 6-8 inches.
            Time estimated.

0755 PM     Tstm Wnd Dmg     1 ESE Landing           40.90N 74.65W
06/26/2024                   Morris             NJ   Trained Spotter

            Trees down on Maple Path and McGregor Ave in
            Mount Arlington, NJ. Time estimated by
            radar.

0755 PM     Tstm Wnd Dmg     1 NE Dover              40.89N 74.54W
06/26/2024                   Morris             NJ   Trained Spotter

            Trained spotter sent in pictures of large
            trees on the ground. Time estimated from
            radar.

0759 PM     Tstm Wnd Gst     2 WNW Vernon Valley     41.25N 74.52W
06/26/2024  M62 MPH          Sussex             NJ   Public

            Personal Weather Station: Lake Panorama -
            KNJVERNO10 gusted to 62 mph.

0809 PM     Tstm Wnd Gst     1 NW Florham Park       40.80N 74.41W
06/26/2024  M53 MPH          Morris             NJ   AWOS

            AWOS station KMMU Morristown.

0813 PM     Tstm Wnd Dmg     Pompton Plains          40.97N 74.30W
06/26/2024                   Morris             NJ   Public

            Downed trees in Pompton Plains. Wind gust
            estimated to be 60 mph. Time estimated from
            radar.

1045 PM     Tstm Wnd Dmg     1 NE Wyncote            40.10N 75.14W
06/26/2024                   Montgomery         PA   Trained Spotter

            Large tree branch down on wires with other
            large limbs down on Paxson Ave in Glenside.

1046 PM     Tstm Wnd Dmg     1 NNW Jenkintown        40.10N 75.13W
06/26/2024                   Montgomery         PA   Trained Spotter

            Pictures from a trained spotter showed some
            downed trees and wires on Baeder Road,
            Rodman Avenue and Old York Road. A downed
            tree landed onto a house on Rodman Avenue.
            Time estimated from radar.

1109 PM     Tstm Wnd Dmg     5 ENE Delmar            38.48N 75.48W
06/26/2024                   Sussex             DE   Broadcast Media

            Tree partially on house along Pepperbox
            Road.

1109 PM     Tstm Wnd Dmg     4 WNW Gumboro           38.50N 75.43W
06/26/2024                   Sussex             DE   Broadcast Media

            Roof blown off a pole barn and trees blown
            down near Careys Camp Road and Little Hill
            Road.

1115 PM     Hail             1 NNE Rancocas          40.03N 74.86W
06/26/2024  M0.50 Inch       Burlington         NJ   Public

            Multiple reports of half-inch hail in
            Rolling Hills section of Westampton.

1122 PM     Hail             Mount Holly WFO         40.01N 74.82W
06/26/2024  M0.50 Inch       Burlington         NJ   Official NWS Obs

1135 PM     Tstm Wnd Gst     Columbus NJWxNet        40.03N 74.73W
06/26/2024  M52 MPH          Burlington         NJ   Mesonet

            NJWXNET: Columbus gusted to 52 mph.

1142 PM     Marine Tstm Wind 6 ESE Woodland Beach    39.30N 75.38W
06/26/2024  E45 MPH          ANZ430             DE   Mesonet

            Ship John Shoal, NJ (NOS-PORTS) gusted to 45
            mph.

1145 PM     Marine Tstm Wind Lower Alloways Creek    39.48N 75.54W
06/26/2024  M55 MPH          Salem              NJ   Mesonet

            NJWXNET Site: Lower Alloways Creek gusted to
            55 mph.

1148 PM     Tstm Wnd Gst     2 E Fort Dix            40.02N 74.58W
06/26/2024  M51 MPH          Burlington         NJ   AWOS

            AWOS station KWRI McGuire AFB.

1150 PM     Marine Tstm Wind Fortescue               39.24N 75.18W
06/26/2024  M43 MPH          Cumberland         NJ   Mesonet

            NJWXNET Station NJ67 Fortescue.

1155 PM     Tstm Wnd Gst     1 NE Midvale            39.67N 75.60W
06/26/2024  M46 MPH          New Castle         DE   ASOS

            ASOS station KILG Wilmington.

1156 PM     Marine Tstm Wind Indian Beach            38.68N 75.08W
06/26/2024  M39 MPH          Sussex             DE   Mesonet

            WeatherFlow site Dewey Beach - XDEW.

1200 AM     Tstm Wnd Dmg     1 WNW Jackson           40.13N 74.30W
06/27/2024                   Ocean              NJ   Utility Company

            Some downed trees resulted in power outages.
            Time estimated from radar.

1200 AM     Marine Tstm Wind 9 WNW Cape May Point    38.99N 75.11W
06/27/2024  M44 MPH          ANZ431             NJ   Other Federal

            A 44 mph, 38 knots, thunderstorm wind gust
            at Brandywine Shoal Light. A peak wind gust
            to 46 mph, 40 knots, occurred at 12:06 AM.

1202 AM     Tstm Wnd Dmg     2 N Lakehurst           40.05N 74.30W
06/27/2024                   Ocean              NJ   Utility Company

            Tree damage resulted in power outages. Time
            estimated from radar.

1218 AM     Tstm Wnd Dmg     Ramtown                 40.13N 74.14W
06/27/2024                   Monmouth           NJ   Utility Company

            Downed trees resulted in power outages. Time
            estimated from radar.

1230 AM     Marine Tstm Wind 1 ESE Manasquan         40.12N 74.03W
06/27/2024  M49 MPH          Monmouth           NJ   Mesonet

            NJWxNet site at Sea Girt.

1230 AM     Marine Tstm Wind 1 NNW Sea Isle City     39.17N 74.70W
06/27/2024  M39 MPH          ANZ453             NJ   Mesonet

            WeatherFlow site at Ludlam Bay - XLUD.

0114 AM     Marine Tstm Wind 2 E Waretown            39.79N 74.17W
06/27/2024  M42 MPH          ANZ451             NJ   Mesonet

            WeatherFlow site at Kite Island - XKIT.

&&

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 2:44 PM EDTSmall Craft AdvisoryPHI49 hr
Jun 28, 4:37 PM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean27 hr

Nearby

Heat Advisories in New Jersey, 2024Heat Advisories in Pennsylvania, 2024Heat Advisories in Maryland, 2024Every heat advisory in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.