Flood Watch 6, NWS Philadelphia/Mount Holly

Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

542 
WGUS61 KPHI 081831
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
231 PM EDT Tue Jul 8 2025

DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ060>062-070-
071-101>106-090400-
/O.CON.KPHI.FA.A.0006.000000T0000Z-250709T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen
Annes-Talbot-Caroline-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-Western
Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Lansdale, New Brunswick, Camden, Mount
Holly, Cape May Court House, Sandy Hook, Long Beach Island,
Chestertown, Honey Brook, Atlantic City, Allentown, Philadelphia,
Reading, Newton, Washington, Norristown, Jackson, Media, West
Chester, Trenton, Oxford, Morrisville, Georgetown, Flemington,
Freehold, Somerville, Pottstown, Pennsville, Perkasie, Ocean
City, Dover, Denton, Morristown, Kennett Square, Millville,
Wharton State Forest, Bethlehem, Collegeville, Wilmington,
Doylestown, Cherry Hill, Chalfont, Centreville, Easton,
Glassboro, Moorestown, Hammonton, and Rehoboth Beach
231 PM EDT Tue Jul 8 2025

...FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WHAT...Flooding caused by excessive rainfall continues to be 
  possible.

* WHERE...Portions of Delaware, including the following areas, 
  Delaware Beaches, Inland Sussex, Kent and New Castle, northeast 
  Maryland, including the following areas, Caroline, Kent MD, Queen 
  Annes and Talbot, New Jersey, including the following areas, 
  Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal 
  Atlantic, Coastal Ocean, Cumberland, Eastern Monmouth, Gloucester, 
  Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, 
  Ocean, Salem, Somerset, Southeastern Burlington, Sussex, Warren 
  and Western Monmouth, and Pennsylvania, including the following 
  areas, Berks, Delaware, Eastern Chester, Eastern Montgomery, 
  Lehigh, Lower Bucks, Northampton, Philadelphia, Upper Bucks, 
  Western Chester and Western Montgomery.

* WHEN...Until midnight EDT tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - A frontal boundary will collide with a tropical airmass and
    produce widespread showers and thunderstorms this afternoon
    into tonight. Rainfall rates of up to 2 inches per hour or
    more will be possible, leading to flash flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood 
Warnings. Those living in areas prone to flooding should be prepared 
to take action should flooding develop.

&&

$$

DeSilva

989 
WGUS61 KPHI 082352
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
752 PM EDT Tue Jul 8 2025

NJZ001-007>010-012-015-PAZ061-062-105-090100-
/O.CAN.KPHI.FA.A.0006.000000T0000Z-250709T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer-Lehigh-
Northampton-Upper Bucks-
Including the cities of Newton, Bethlehem, Trenton, Morristown,
Flemington, Easton, Chalfont, Allentown, New Brunswick,
Somerville, Perkasie, and Washington
752 PM EDT Tue Jul 8 2025

...FLOOD WATCH IS CANCELLED...

The Flood Watch is cancelled for portions of New Jersey, including 
the following areas, Hunterdon, Mercer, Middlesex, Morris, Somerset, 
Sussex and Warren and Pennsylvania, including the following areas, 
Lehigh, Northampton and Upper Bucks.

The flooding threat has ended. Therefore, the Flood Watch is being 
cancelled.

$$

DEZ001>004-MDZ012-015-019-020-NJZ013-014-016>027-PAZ060-070-071-
101>104-106-090400-
/O.CON.KPHI.FA.A.0006.000000T0000Z-250709T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen
Annes-Talbot-Caroline-Western Monmouth-Eastern Monmouth-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Berks-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-Eastern
Montgomery-Lower Bucks-
Including the cities of West Chester, Atlantic City, Georgetown,
Pottstown, Collegeville, Glassboro, Hammonton, Media, Long Beach
Island, Wharton State Forest, Dover, Ocean City, Doylestown,
Centreville, Millville, Pennsville, Camden, Reading, Moorestown,
Cape May Court House, Chestertown, Mount Holly, Wilmington,
Kennett Square, Lansdale, Cherry Hill, Jackson, Norristown,
Oxford, Denton, Philadelphia, Morrisville, Rehoboth Beach, Sandy
Hook, Easton, Honey Brook, and Freehold
752 PM EDT Tue Jul 8 2025

...FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WHAT...Flooding caused by excessive rainfall continues to be 
  possible.

* WHERE...Portions of Delaware, including the following areas, 
  Delaware Beaches, Inland Sussex, Kent and New Castle, northeast 
  Maryland, including the following areas, Caroline, Kent MD, Queen 
  Annes and Talbot, New Jersey, including the following areas, 
  Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal 
  Atlantic, Coastal Ocean, Cumberland, Eastern Monmouth, Gloucester, 
  Northwestern Burlington, Ocean, Salem, Southeastern Burlington and 
  Western Monmouth, and Pennsylvania, including the following areas, 
  Berks, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, 
  Philadelphia, Western Chester and Western Montgomery.

* WHEN...Until midnight EDT tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - A frontal boundary will collide with a tropical airmass and
    produce widespread showers and thunderstorms this afternoon
    into tonight. Rainfall rates of up to 2 inches per hour or
    more will be possible, leading to flash flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood 
Warnings. Those living in areas prone to flooding should be prepared 
to take action should flooding develop.

&&

$$

Hoeflich

612 
WGUS61 KPHI 090146
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
946 PM EDT Tue Jul 8 2025

DEZ001>004-MDZ012-015-019-020-NJZ013-014-016>027-PAZ060-070-071-
101>104-106-090300-
/O.CAN.KPHI.FA.A.0006.000000T0000Z-250709T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen
Annes-Talbot-Caroline-Western Monmouth-Eastern Monmouth-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Berks-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-Eastern
Montgomery-Lower Bucks-
Including the cities of West Chester, Atlantic City, Georgetown,
Pottstown, Collegeville, Glassboro, Hammonton, Media, Long Beach
Island, Wharton State Forest, Dover, Ocean City, Doylestown,
Centreville, Millville, Pennsville, Camden, Reading, Moorestown,
Cape May Court House, Chestertown, Mount Holly, Wilmington,
Kennett Square, Lansdale, Cherry Hill, Jackson, Norristown,
Oxford, Denton, Philadelphia, Morrisville, Rehoboth Beach, Sandy
Hook, Easton, Honey Brook, and Freehold
946 PM EDT Tue Jul 8 2025

...FLOOD WATCH IS CANCELLED...

The Flood Watch is cancelled for portions of Delaware, including the 
following areas, Delaware Beaches, Inland Sussex, Kent and New 
Castle, northeast Maryland, including the following areas, Caroline, 
Kent MD, Queen Annes and Talbot, New Jersey, including the following 
areas, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, 
Coastal Atlantic, Coastal Ocean, Cumberland, Eastern Monmouth, 
Gloucester, Northwestern Burlington, Ocean, Salem, Southeastern 
Burlington and Western Monmouth, and Pennsylvania, including the 
following areas, Berks, Delaware, Eastern Chester, Eastern 
Montgomery, Lower Bucks, Philadelphia, Western Chester and Western 
Montgomery.

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures. A Flood Watch for portions of the area 
may be needed for tomorrow, July 9. Please remain alert for updated 
watches.

$$

Hoeflich

Area Forecast Discussion
National Weather Service Mount Holly NJ
1005 PM EDT Mon Jul 7 2025

.SYNOPSIS...
Bermuda high pressure will remain in place offshore through the
week. Chantal's remnants will pass offshore of Delmarva this evening,
then a few additional weak systems and a slow moving frontal boundary
will impact the region through the remainder of the week.

&&

.NEAR TERM /THROUGH TUESDAY/...
A few scattered showers and thunderstorms associated with a
decaying line of convection from central PA may clip areas of the
Poconos, Lehigh Valley, and Berks County in the next few hours.
Otherwise, overall rain activity will be diminishing tonight. It'll
remain quite muggy outside overnight with lows only in the low
to mid 70s and upper 60s in the Poconos.

The unsettled, active, and tropical weather pattern will continue
through Tuesday due to a slow-moving cold front which will work its
way toward the area, but won't actually cross through the area until
mid-late week. This boundary will act as the trigger for convection
in both the severe and hydro department on Tuesday. PWATs will
remain in the range of 1.8-2.3 inches; tall, skinny CAPE on the
order of 1500-2500 J/kg; and relatively low unidirectional effective
shear up to 20 kt supports the potential for training convection
where any residual boundaries are in place. There won't be much dry
air to speak of in the DCAPE department, however steep low-level
lapse rates combined with water loaded downdrafts will yield a
localized damaging wind threat with any stronger or more organized
updrafts. As a result, the Storm Prediction Center and Weather
Prediction Center have increased the threat for severe weather and
excessive rainfall on Tuesday afternoon respectively, with both
upgrading most of our forecast area to a SLIGHT risk. Have
considered extending and expanding the current Flood Watch through
tomorrow evening to cover this potential threat, however have opted
to let the current watch run its course with the remnants of
Chantal. We'll continue to monitor this potential threat over the
next 12-24 hours and let future shifts decide when a future Flood
Watch becomes necessary. The main takeaway here is that there is an
increase in additional flash flooding exacerbated by antecedent
conditions and additional heavy rainfall.

As for temperatures, Tuesday will feature mostly sunny skies in the
morning with increasing clouds ahead of the thunderstorm potential
mid-late afternoon. Forecast highs are expected to be in the upper
80s to mid 90s across most of the area with tropical dew points
remaining in the low to mid 70s. As a result, heat indicies are
expected to range between 100-105 degrees across much of the area.
For this reason, have kept current heat headlines in place and have
expanded the Heat Advisory south and east to include the remainder
of our southern New Jersey, Delaware, and Maryland counties
(excluding the immediate coastal strips) through 8 PM Tuesday.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
The remnants of Chantal will be long gone, but the environment will
not change much with plenty of humidity lingering across the Middle
Atlantic region. This humidity will be acted upon by daytime heating
and several shortwaves both Wed/Thu. In addition, a weak front
lingering across the area will focus showers/tstms thru the period.
We'll have likely pops for all areas Thursday but just for Delmarva
Wednesday. Chance pops will round out the other periods. Rainfall
will be heavy at times with instances of flash flooding possible
both days. While widespread severe weather is not likely, there
could be strong gusty winds associated with downpours at times.

Temperatures will be summer-like Wed with highs above normal.
readings will top out in the upper 80s/low 90s most areas. Apparent
temps will be some 5 to 7 degrees higher with all the humidity
about. The highs for Thu will be closer to normal with upper 70s/low
80s for the N and w areas and mid 80s elsewhere.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
The period from this Friday through next Monday continues to look
rather unsettled with summer-like precipitation and rather mild
temperatures, compared to recently. The high temps through the
period are fcst to be at or a little below normal. Normal highs for
early/mid July are mostly in the mid 80s for Philadelphia, Delmarva,
the Lehigh Valley and south NJ while upper 70s/low 80s are normal
for north NJ and the southern Poconos. Normal lows are generally in
the 60s but closer to 70 for KPHL.

Precipitation will be showery, each day, with tstms too mostly
afternoon and early evening hours. Models are not showing strongly
synoptic cues to organize precip, mostly just subtle disturbances in
the flow which are notorious for difficult timing/placement. The
precip fcsts offered by the models will change several times before
the day arrives. The broad-brushed chance pops offered by the NBM
are accepted without change.

&&

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

Tonight...Primarily VFR. A few lingering showers and perhaps a
thunderstorm could bring brief periods of sub-VFR conditions
until we become mostly dry by around 02Z and later. ACY looks to
be the outlier with moments of IFR conditions for the next few
hours thanks to a cluster of scattered showers nearby.
Scattered mid- high clouds with a few low clouds possible.
Southwest winds around 3-5 kt, becoming VRB/calm at times. High
confidence.

Tuesday...VFR expected for much of the day with sub-VFR conditions
possible late in the afternoon as scattered thunderstorms move into
the region after 19Z. Southwest winds around 5-10 kt with gusts up
to 15 kt possible. Moderate confidence.

Outlook...

Tuesday night through Saturday...VFR should generally prevail
during the daytime periods with daily chances for thunderstorms,
especially in the afternoon and evening hours. Areas of fog and
low clouds with restrictions more probable at night.

&&

.MARINE...
Small Craft Advisories have been issued for the Atlantic coastal
waters from Fenwick Island to Cape May until 12 AM Tuesday and from
Cape May to Manasquan Inlet until 5 AM Tuesday due to seas around 5
feet.

South-southwest winds around 10-15 kt expected through Tuesday, with
occasional gusts up to 20 kt possible. Seas up to 5 feet expected
tonight with seas around 2-4 feet expected on Tuesday. Several
rounds of showers and thunderstorms expected.

Outlook...

Tuesday night through Friday...Winds and seas are forecast to remain
below advisory criteria. Daily chances of showers and thunderstorms.
Some areas of fog possible at times.

Rip Currents...

For today, southerly winds will increase to 10-15 mph. Breaking
wave heights increase to 3-4 feet with a primary SE swell
around 1-3 feet and an 8 second period increasing to around
12-14 seconds during the afternoon. With the winds looking more
onshore, have opted to increase the rip current risk to HIGH for
dangerous rip currents from Cape May to LBI. Will maintain
MODERATE for the easterly facing beaches across Delaware and
Monmouth in NJ.

For Tuesday, winds shift southwesterly becoming more alongshore
flow around 5-10 mph in the morning increasing to 10-15mph in
the afternoon. Breaking wave heights should be in the 2-4 foot
range depending on beach orientation with a primary SE swell
increasing to 4 feet at a 6-8 second period. Given the tides
will be around low tide in the morning with the increase in
swell, will maintain a HIGH risk for rip currents for the
easterly facing beaches and MODERATE elsewhere.

Rip currents occur often in the vicinities of jetties and piers
and the speed of the currents are generally maximized at low
tides.

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

&&

.HYDROLOGY...
The Flood Watch remains in effect through 10 PM this evening. A
tropical airmass with precipitable waters in excess of 2 inches will
persist over the region today. Weak steering flow and the abundance
of tropical moisture will lead to highly efficient rainfall rates
across the region. Basin wide rainfall totals are anticipated to be
in the 1 to 2 inch range with the potential for up to 5 inches in
heavier thunderstorms. Main stem river flooding is not anticipated
but flash flooding of smaller streams/creeks and areas of poor
drainage will be possible. Please heed any road closures and law
enforcement instructions in case of flooding.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Heat Advisory from 10 AM to 8 PM EDT Tuesday for PAZ070-071-
     101>106.
NJ...Heat Advisory from 10 AM to 8 PM EDT Tuesday for NJZ009-010-
     012>023-027.
     High Risk for Rip Currents through Tuesday evening for NJZ024>026.
DE...Heat Advisory from 10 AM to 8 PM EDT Tuesday for DEZ001>003.
MD...Heat Advisory from 10 AM to 8 PM EDT Tuesday for MDZ012-015-
     019-020.
MARINE...Small Craft Advisory until 6 AM EDT Tuesday for ANZ451>453.
     Small Craft Advisory until midnight EDT tonight for ANZ454-455.

&&

SYNOPSIS...Staarmann
NEAR TERM...Deal/DeSilva/MJL/Staarmann
SHORT TERM...OHara
LONG TERM...OHara
AVIATION...MJL/OHara
MARINE...DeSilva/OHara
HYDROLOGY...

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
437 AM EDT Mon Jul 7 2025

MDZ012-015-019-020-080845-
Kent MD-Queen Annes-Talbot-Caroline-
437 AM EDT Mon Jul 7 2025

...FLOOD WATCH IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH THIS
EVENING...

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.

   Flood Watch.

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

Scattered severe thunderstorms will be capable of producing
locally damaging winds and instances of flash flooding Tuesday
afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
501 PM EDT Mon Jul 7 2025

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

0400 PM     Flash Flood      1 SSW Lincoln Universit 39.78N 75.94W
07/07/2025                   Chester            PA   Trained Spotter

            Pictures of flooding of West Branch Big Elk
            Creek overflowing and spilling over to Old
            Creek Road and Oxford Road. Time given in
            report.

&&

Hoeflich