New Jersey, 2023

Flash Flood in New Jersey, July 18, 2023

July 18, 2023 · NWS PHI · 1 event in 1 county or zone

Thunderstorms brought locally heavy rain to Monmouth County on the afternoon of July 18. 5 inches.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PHI wrote it up.

Thunderstorms brought locally heavy rain to Monmouth County on the afternoon of July 18. Rainfall totals were as high as 1.5 to 2.5 inches.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Jul 18, 12:26 PM EST, 24 minutes earlier.

Area forecast discussion, Jul 18, 12:26 PM EST, 24 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
126 PM EDT Tue Jul 18 2023

.SYNOPSIS...
A weak cold front will stall near the area tonight into
Wednesday. This front will move back to the north as a warm
front Thursday before a stronger cold front moves through the
region on Friday. High pressure will build in from the west over
the weekend.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
Convection continues early this afternoon on a trough that runs
north-south along the I-95 corridor. The focus of storms for
the rest of the afternoon should stay in New Jersey and southern
Delaware, moving offshore by this evening. With PW's approaching
2 inches, heavy downpours will be a concern, along with
isolated severe weather.

There may be patchy fog tonight especially in those locations
that had rain during the day. Clouds and additional convection
will redevelop after midnight as another shortwave approaches
and we enter the left exit region of another jet streak.
Convection will taper off Wednesday morning, but additional
showers and thunderstorms will form Wednesday afternoon mainly along
and south of a front that should lie across the I-95 corridor. At
this point the chances for severe weather or flooding appear to
be low. It will be another very warm and humid day but a few
degrees cooler than Tuesday as there should be a bit more cloud
cover.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/...
The overall unsettled pattern we've been in looks to continue
through the short term.

The general trend should be for convection to diminish Wednesday
evening into the overnight due to the loss of heating but still
can't rule out a few isolated storms around. Lows range from the 60s
over most of eastern PA and interior NJ to around 70 over the urban
corridor and most of Delmarva.

For Thursday, the day should begin mainly dry with chances for
showers and storms starting to ramp up beginning in the afternoon as
the next more organized system approaches from the west. This means
showers/storms should initiate over central and western PA before
starting to move into our eastern PA zones by mid to late afternoon.
However the best chances for more organized and widespread
showers/storms looks to come through Thursday night as a low
pressure system tracks across southern Ontario helping to push a
cold front into the region. In fact the deep layer forcing could be
fairly strong with an upper level wave taking on a neutral to
negative tilt as it moves through and SE PA becoming situated near a
left jet exit region. Limiting factor for severe weather may be
timing being mainly at night with marginal deep layer shear values
around 30 knots. Still, think there is at least some potential for
severe storms along with flooding/flash flooding threat as PWATs
will be around 1.8 to 2.0 inches or so. It remains very warm and
humid with highs Thursday mainly in the 80s to around 90 and lows
Thursday night mainly in the 60s to around 70.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
A slow moving cold front will be moving through the area during the
day Friday and this will keep a good chance for showers and
thunderstorms in the forecast. Biggest threat looks to be heavy rain
creating the potential for flooding and/or flash flooding.

The good news is that heading into the weekend the front should
start to clear the area to the east and this means the weekend
should be mainly dry and also cooler and less humid. It is worth
noting though that some of the guidance has trended a bit slower
moving the front off the coast and if this trend were to continue it
could result in some showers continuing into Saturday. For now
though, we keep showers out of the forecast except for the mention
of slight chances over portions of NE PA and northern NJ.

Sunday should feature partly to mostly sunny skies with seasonable
temperatures and relatively comfortable humidity levels to finish
out the weekend. Beyond this time, chances for showers and storms
start to increase once again through early next week as the next
system approaches.

&&

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

Rest of this afternoon...Scattered showers/t-storms especially
along and east of the Delaware River with MVFR or brief IFR
conditions possible. Winds south to southwest 5-10 kts.

Tonight...Any early shower or thundertorm, then additional
scattered showers and thunderstorms after midnight. Otherwise,
mainly VFR. Winds south to west 5-10 kts or less.

Wednesday...Chance for a few scattered showers and storms, mainly
near and south of ILG-PHL-EWR. Otherwise VFR. Northwest to west
winds around 5 to 10 knots except winds becoming southerly at
ACY. Moderate confidence.

Outlook...

Thursday and Friday...A cold front may move through with a
period of more widespread showers and thunderstorms...highest
chances look to be late day Thursday through early afternoon
Friday. VFR with times of MVFR and IFR around
showers/thunderstorms. SE-S winds of 5-10kts, shifting to more
westerly behind the front by late day Friday. Moderate
confidence.

Saturday...VFR. Northwest winds around 10 knots. Moderate
confidence.

&&

.MARINE...
Sub-advisory conditions through Wednesday with seas 2-4 ft and
winds south to southwest 10-15 kts. Main concern will be
potential for scattered t-storm potential this
afternoon/evening and again Wednesday.

Outlook...

No marine headlines expected. Winds generally around 10 knots with
seas of 2 to 4 feet. Scattered showers and thunderstorms possible
(20-40% chance) mainly in the afternoon and evening periods
Wednesday night through Friday.

Rip Currents...

A southerly wind increasing to around 10 MPH is anticipated for
today with breaking waves around 2 to 3 feet and a medium
period east to southeast swell. An underlying long period east
to southeast swell will likely be present, resulting in a
MODERATE risk for the development of dangerous rip currents
along the coasts of Delaware and New Jersey.

A light northwest to west wind on Wednesday morning is forecast
to become southerly around 10 MPH in the afternoon. Breaking
waves should be 1 to 2 feet with a medium period east to
southeast swell. There should still be an underlying long period
swell from the east and southeast. However, with breaking wave
heights on the decrease, we will carry a LOW risk for rip
currents on Wednesday.

&&

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

&&

SYNOPSIS...Fitzsimmons/Franklin
NEAR TERM...Franklin/RCM
SHORT TERM...Fitzsimmons
LONG TERM...Fitzsimmons
AVIATION...Fitzsimmons/Franklin/RCM
MARINE...Fitzsimmons/Franklin/RCM
Hazardous weather outlook, Jul 18, 9:23 AM EST, 3 hours 27 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1023 AM EDT Tue Jul 18 2023

DEZ001-191423-
New Castle-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for New Castle County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

DEZ002-191423-
Kent-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Kent County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

DEZ003-191423-
Inland Sussex-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for inland portions of Sussex County
in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

DEZ004-191423-
Delaware Beaches-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Sussex County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ054-191423-
Carbon-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Carbon County in Pennsylvania.

.DAY ONE...Through tonight.

Hot conditions could result in heat exhaustion with prolonged exposure.
Windy conditions may cause isolated instances of tree damage and power outages.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

Several instances of flooding are possible on Thursday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ055-191423-
Monroe-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Monroe County in Pennsylvania.

.DAY ONE...Through tonight.

Hot conditions could result in heat exhaustion with prolonged exposure.
Windy conditions may cause isolated instances of tree damage and power outages.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

Several instances of flooding are possible on Thursday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ060-191423-
Berks-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ061-191423-
Lehigh-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ062-191423-
Northampton-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ070-191423-
Delaware-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Delaware County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ071-191423-
Philadelphia-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ101-191423-
Western Chester-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for western Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ102-191423-
Eastern Chester-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for eastern Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ103-191423-
Western Montgomery-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for western Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ104-191423-
Eastern Montgomery-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for eastern Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ105-191423-
Upper Bucks-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for upper Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ106-191423-
Lower Bucks-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for lower Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ001-191423-
Sussex-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Sussex County in New Jersey.

.DAY ONE...Through tonight.

Hot conditions could result in heat exhaustion with prolonged exposure.
Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.
Windy conditions may cause isolated instances of tree damage and power outages.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

Several instances of flooding are possible on Thursday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ007-191423-
Warren-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Warren County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ008-191423-
Morris-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Morris County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ009-191423-
Hunterdon-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Hunterdon County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ010-191423-
Somerset-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Somerset County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ012-191423-
Middlesex-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Middlesex County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ013-191423-
Western Monmouth-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for western Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ014-191423-
Eastern Monmouth-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for eastern Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ015-191423-
Mercer-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Mercer County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ016-191423-
Salem-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Salem County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ017-191423-
Gloucester-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Gloucester County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ018-191423-
Camden-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Camden County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ019-191423-
Northwestern Burlington-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for northwestern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ020-191423-
Ocean-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for inland portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ021-191423-
Cumberland-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Cumberland County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ022-191423-
Atlantic-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for inland portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ023-191423-
Cape May-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Cape May County excluding the
Atlantic coast in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ024-191423-
Atlantic Coastal Cape May-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Cape May County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ025-191423-
Coastal Atlantic-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for coastal portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ026-191423-
Coastal Ocean-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for coastal portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ027-191423-
Southeastern Burlington-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for southeastern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ012-191423-
Kent MD-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Kent County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ015-191423-
Queen Annes-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Queen Annes County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ019-191423-
Talbot-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Talbot County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ020-191423-
Caroline-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for Caroline County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-191423-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for upper Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ431-191423-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for lower Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ450-191423-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Monmouth County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ451-191423-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Ocean County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ452-191423-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Atlantic County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ453-191423-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Cape May County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ454-191423-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to the mouth of Delaware Bay out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ455-191423-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
1023 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Sussex County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 18, 10:19 AM EST, 2 hours 31 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1119 AM EDT Tue Jul 18 2023

NJZ010-012-181545-
Somerset NJ-Middlesex NJ-
1119 AM EDT Tue Jul 18 2023

...A strong thunderstorm will impact portions of southeastern
Somerset and northeastern Middlesex Counties through 1145 AM EDT...

At 1119 AM EDT, Doppler radar was tracking a strong thunderstorm over
New Brunswick, moving northeast at 20 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
New Brunswick, Somerset, Edison, East Brunswick, Sayreville, North
Brunswick, North Brunswick Township, Society Hill, Woodbridge, South
River, Highland Park, Metuchen, Milltown, Fords and Iselin.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 12.
 Interstate 287 in New Jersey between mile markers 0 and 4.
 Garden State Parkway between mile markers 124 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4050 7428 4047 7427 4041 7449 4045 7455
      4061 7435 4050 7426
TIME...MOT...LOC 1519Z 236DEG 18KT 4046 7445

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

AKL
Special weather statement, Jul 18, 12:28 PM EST, 22 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
128 PM EDT Tue Jul 18 2023

NJZ020-026-181815-
Coastal Ocean NJ-Ocean NJ-
128 PM EDT Tue Jul 18 2023

...A strong thunderstorm will impact portions of east central Ocean
County through 215 PM EDT...

At 128 PM EDT, Doppler radar was tracking a strong thunderstorm over
Beachwood, or 7 miles south of Toms River, moving east at 20 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Toms River, Beachwood, Seaside Heights, Mantoloking, Dover Beaches
North, Holiday City South, Dover Beaches South, Holiday
City-Berkeley, South Toms River, Island Heights, Silver Ridge,
Gilford Park and Holiday Heights.

This includes Garden State Parkway between mile markers 74 and 83.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3983 7426 3994 7431 4011 7393 3984 7381
TIME...MOT...LOC 1728Z 250DEG 17KT 3989 7418

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Iovino

The radar

The Philadelphia radar (KDIX), 61 km away, was scanning. The volume nearest the first event began at 17:47 UTC.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Monmouth

When
July 18, 12:50 PM EST to 2:00 PM EST
Where
Monmouth County, 0.63 mi SSE of Atlantic Highlands to 0.5 mi W of Navesink
Cause
Heavy Rain
Reported by
911 Call Center
Coordinates
40.412, -74.024

Widespread roadway flooding occurred in Atlantic Highlands with some road closures. Hillside Avenue was closed at Brook Avenue in Middletown Township due to flooding.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in New Jersey in 2023Every state in 2023This day in weather historyWarnings in New Jersey, July 2023

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1102415.