Alert archive / New Jersey / Flood Watches in 2026
Flood Watch 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Jul 17, 2026, 1:40 PM EDT for 10 counties in Pennsylvania; 13 counties in New Jersey; New Castle County, Delaware. It took effect at Jul 18, 2026, 10:00 AM EDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2026, 1:40 PM EDT (17:40 UTC)
- In effect from
- Jul 18, 2026, 10:00 AM EDT
- Expired
- Jul 18, 2026, 10:53 PM EDT
- In force
- 13 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 24 counties
New Castle County, DE, Burlington County, NJ, Camden 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, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 17:41 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
Brookhaven, NY (KOKX), launched 12:00Z, 5.7 hours before the alert went out and 196 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1592 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
987
WGUS61 KPHI 171740
FFAPHI
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
140 PM EDT Fri Jul 17 2026
DEZ001-NJZ001-007>010-012-013-015>019-PAZ054-055-060>062-070-071-
101>106-180800-
/O.NEW.KPHI.FA.A.0004.260718T1400Z-260719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Mercer-Salem-Gloucester-Camden-Northwestern
Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Morristown, Honey Brook, Mount Holly,
Media, Moorestown, Morrisville, Somerville, Chalfont, Bethlehem,
Pottstown, Flemington, Glassboro, New Brunswick, Cherry Hill,
Washington, Jim Thorpe, Newton, Reading, Lansdale, Trenton,
Perkasie, Wilmington, West Chester, Philadelphia, Norristown,
Pennsville, Kennett Square, Easton, Freehold, Doylestown, Oxford,
Allentown, Collegeville, Stroudsburg, and Camden
140 PM EDT Fri Jul 17 2026
...FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY
NIGHT...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of northern Delaware, including the following
area, New Castle, New Jersey, including the following areas,
Camden, Gloucester, Hunterdon, Mercer, Middlesex, Morris,
Northwestern Burlington, Salem, Somerset, Sussex, Warren and
Western Monmouth, and Pennsylvania, including the following areas,
Berks, Carbon, Delaware, Eastern Chester, Eastern Montgomery,
Lehigh, Lower Bucks, Monroe, Northampton, Philadelphia, Upper
Bucks, Western Chester and Western Montgomery.
* WHEN...From Saturday morning through late Saturday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Multiple rounds of heavy showers and thunderstorms are
expected for Saturday into Saturday night. Storms will be
capable of producing rainfall amounts of 2 to 3 inches within
a period of just one to two hours leading to flash flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Fitzsimmons4 follow-up statements
977
WGUS61 KPHI 180125
FFAPHI
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
925 PM EDT Fri Jul 17 2026
NJZ014-020-026-027-181330-
/O.EXA.KPHI.FA.A.0004.260718T1400Z-260719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eastern Monmouth-Ocean-Coastal Ocean-Southeastern Burlington-
Including the cities of Wharton State Forest, Long Beach Island,
Jackson, and Sandy Hook
925 PM EDT Fri Jul 17 2026
...FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY
NIGHT...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and southern New Jersey, including the
following areas, in central New Jersey, Eastern Monmouth. In
southern New Jersey, Coastal Ocean, Ocean and Southeastern
Burlington.
* WHEN...From Saturday morning through late Saturday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Multiple rounds of heavy showers and thunderstorms are
expected for Saturday into Saturday night. Storms will be
capable of producing rainfall amounts of 2 to 3 inches within
a period of just one to two hours leading to flash flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
DEZ001-NJZ001-007>010-012-013-015>019-PAZ054-055-060>062-070-071-
101>106-181330-
/O.CON.KPHI.FA.A.0004.260718T1400Z-260719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Mercer-Salem-Gloucester-Camden-Northwestern
Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Bethlehem, Lansdale, Perkasie, Honey
Brook, Philadelphia, Kennett Square, Media, Doylestown, Camden,
Newton, Wilmington, Moorestown, Morristown, Reading, Allentown,
Flemington, Somerville, Stroudsburg, Morrisville, Pennsville,
Oxford, Mount Holly, Norristown, Pottstown, New Brunswick,
Freehold, Cherry Hill, Collegeville, West Chester, Chalfont,
Glassboro, Jim Thorpe, Easton, Trenton, and Washington
925 PM EDT Fri Jul 17 2026
...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY MORNING THROUGH LATE
SATURDAY NIGHT...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of northern Delaware, including the following
area, New Castle, New Jersey, including the following areas,
Camden, Gloucester, Hunterdon, Mercer, Middlesex, Morris,
Northwestern Burlington, Salem, Somerset, Sussex, Warren and
Western Monmouth, and Pennsylvania, including the following areas,
Berks, Carbon, Delaware, Eastern Chester, Eastern Montgomery,
Lehigh, Lower Bucks, Monroe, Northampton, Philadelphia, Upper
Bucks, Western Chester and Western Montgomery.
* WHEN...From Saturday morning through late Saturday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Multiple rounds of heavy showers and thunderstorms are
expected for Saturday into Saturday night. Storms will be
capable of producing rainfall amounts of 2 to 3 inches within
a period of just one to two hours leading to flash flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Hoeflich153
WGUS61 KPHI 180135
FFAPHI
Flood Watch
National Weather Service Mount Holly NJ
935 PM EDT Fri Jul 17 2026
DEZ001-NJZ001-007>010-012>020-026-027-PAZ054-055-060>062-070-071-
101>106-181345-
/O.CON.KPHI.FA.A.0004.260718T1400Z-260719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Coastal Ocean-Southeastern
Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Bethlehem, Lansdale, Perkasie, Honey
Brook, Philadelphia, Kennett Square, Media, Jackson, Doylestown,
Camden, Newton, Wilmington, Moorestown, Morristown, Reading,
Allentown, Flemington, Somerville, Stroudsburg, Wharton State
Forest, Morrisville, Pennsville, Oxford, Mount Holly, Norristown,
Pottstown, New Brunswick, Freehold, Sandy Hook, Cherry Hill,
Collegeville, West Chester, Chalfont, Glassboro, Jim Thorpe,
Easton, Trenton, Washington, and Long Beach Island
935 PM EDT Fri Jul 17 2026
...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY MORNING THROUGH LATE
SATURDAY NIGHT...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of northern Delaware, including the following
area, New Castle, New Jersey, including the following areas,
Camden, Coastal Ocean, 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,
Carbon, Delaware, Eastern Chester, Eastern Montgomery, Lehigh,
Lower Bucks, Monroe, Northampton, Philadelphia, Upper Bucks,
Western Chester and Western Montgomery.
* WHEN...From Saturday morning through late Saturday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Multiple rounds of heavy showers and thunderstorms are
expected for Saturday into Saturday night. Storms will be
capable of producing rainfall amounts of 2 to 3 inches within
a period of just one to two hours leading to flash flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Hoeflich662
WGUS61 KPHI 180613
FFAPHI
Flood Watch
National Weather Service Mount Holly NJ
213 AM EDT Sat Jul 18 2026
DEZ001-NJZ001-007>010-012>020-026-027-PAZ054-055-060>062-070-071-
101>106-190600-
/O.CON.KPHI.FA.A.0004.260718T1400Z-260719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Coastal Ocean-Southeastern
Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Lansdale, Honey Brook, Long Beach Island,
Morristown, Cherry Hill, Morrisville, Pennsville, Newton, Oxford,
Norristown, Perkasie, Trenton, Pottstown, Glassboro, Somerville,
Mount Holly, Sandy Hook, West Chester, New Brunswick, Kennett
Square, Moorestown, Wharton State Forest, Collegeville,
Doylestown, Camden, Washington, Flemington, Jim Thorpe, Easton,
Jackson, Stroudsburg, Media, Philadelphia, Wilmington, Reading,
Allentown, Chalfont, Freehold, and Bethlehem
213 AM EDT Sat Jul 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of northern Delaware, including the following
area, New Castle, New Jersey, including the following areas,
Camden, Coastal Ocean, 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,
Carbon, Delaware, Eastern Chester, Eastern Montgomery, Lehigh,
Lower Bucks, Monroe, Northampton, Philadelphia, Upper Bucks,
Western Chester and Western Montgomery.
* WHEN...From 10 AM EDT this morning through late tonight.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- Multiple rounds of heavy showers and thunderstorms are
expected for Saturday into Saturday night. Storms will be
capable of producing rainfall amounts of 2 to 3 inches within
a period of just one to two hours leading to flash flooding.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
RCM391 WGUS61 KPHI 190253 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1053 PM EDT Sat Jul 18 2026 DEZ001-NJZ001-007>010-012>020-026-027-PAZ054-055-060>062-070-071- 101>106-190400- /O.CAN.KPHI.FA.A.0004.000000T0000Z-260719T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Coastal Ocean-Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware- Philadelphia-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Honey Brook, Camden, Philadelphia, Somerville, Newton, Easton, Moorestown, Jackson, Wilmington, Trenton, Jim Thorpe, Kennett Square, Long Beach Island, Stroudsburg, Mount Holly, Flemington, Pottstown, Chalfont, Norristown, Morrisville, Perkasie, Glassboro, Cherry Hill, Wharton State Forest, Reading, West Chester, Oxford, Freehold, New Brunswick, Pennsville, Media, Bethlehem, Allentown, Sandy Hook, Doylestown, Lansdale, Morristown, Washington, and Collegeville 1053 PM EDT Sat Jul 18 2026 ...FLOOD WATCH IS CANCELLED... The Flash Flood Watch is cancelled for portions of northern Delaware, including the following area, New Castle, New Jersey, including the following areas, Camden, Coastal Ocean, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Ocean, Salem, Somerset, Southeastern Burlington, Sussex, Warren and Western Monmouth, and Pennsylvania, including the following areas, Berks, Carbon, Delaware, Eastern Chester, Eastern Montgomery, Lehigh, Lower Bucks, Monroe, Northampton, Philadelphia, Upper Bucks, Western Chester and Western Montgomery. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Hoeflich
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 8:02 PM EDT | Tornado Warning | PHI | Burlington, Ocean | 28 min |
| Jul 16, 8:25 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 48 min |
| Jul 16, 8:37 PM EDT | Special Marine Warning | PHI | 72 min | |
| Jul 16, 9:08 PM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 16, 9:24 PM EDT | Special Marine Warning | PHI | 25 min | |
| Jul 16, 9:51 PM EDT | Special Marine Warning | PHI | 84 min | |
| Jul 17, 1:49 PM EDT | Small Craft Advisory | PHI | 40 hr |
Nearby
Flood Watches in New Jersey, 2026Flood Watches in Pennsylvania, 2026Flood Watches in Delaware, 2026Every flood watch in 2026
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.