Alert archive / New Jersey / Flash Flood Watches in 2017

Flash Flood Watch 8, NWS Philadelphia/Mount Holly

October 28, 201716 counties in New Jersey; 8 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood watch at Oct 28, 2017, 3:52 AM EDT for 16 counties in New Jersey; 8 counties in Pennsylvania. It took effect at Oct 29, 2017, 12:00 PM EDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued
Oct 28, 2017, 3:52 AM EDT (07:52 UTC)
In effect from
Oct 29, 2017, 12:00 PM EDT
Expired
Oct 30, 2017, 4:00 AM EDT
In force
16 hr
Issued by
NWS Philadelphia/Mount Holly
Flood severity
None
All 24 counties

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, Bucks County, PA, Carbon 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), 56 km from the middle of the area, began a volume at 07:59 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 00:00Z, 7.9 hours before the alert went out and 190 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, Brookhaven, NY at 00:00Z on 2017-10-28Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2017-10-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
1696 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

129 
WGUS61 KPHI 280752
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
352 AM EDT Sat Oct 28 2017

NJZ001-007-008-PAZ054-055-061-062-281600-
/O.NEW.KPHI.FF.A.0008.171029T1600Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
352 AM EDT Sat Oct 28 2017

...FLASH FLOOD WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

The National Weather Service in Mount Holly has issued a

* Flash Flood Watch for portions of northern New Jersey and
  northeastern Pennsylvania, including the following areas, in 
  northern New Jersey, Morris, Sussex, and Warren. In 
  Pennsylvania, Carbon, Lehigh, Monroe, and Northampton. 

* From Sunday afternoon through late Sunday night.

* Moderate to heavy rainfall is expected develop from south to
  north Sunday afternoon and continue into Sunday night. Rainfall
  amounts of 2 to 4 inches are forecast along and north of
  Interstate 80. Locally higher amounts of 5 inches or greater 
  are possible if thunderstorms develop and move over the same 
  locations. 

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf debris, 
  could exacerbate flooding. Localized roadway flooding is 
  possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove 
debris before the heavy rain arrives.

&&

$$
JRK
7 follow-up statements
055 
WGUS61 KPHI 281332
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
932 AM EDT Sat Oct 28 2017

NJZ001-007-008-PAZ054-055-061-062-282145-
/O.CON.KPHI.FF.A.0008.171029T1600Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
932 AM EDT Sat Oct 28 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH LATE SUNDAY NIGHT...

The Flash Flood Watch continues for

* Portions of northern New Jersey and northeastern Pennsylvania, 
  including the following areas, in northern New Jersey, Morris, 
  Sussex, and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and
  Northampton. 

* From Sunday afternoon through late Sunday night

* Moderate to heavy rainfall is expected develop from south to 
  north Sunday afternoon and continue into Sunday night. 
  Rainfall amounts of 2 to 4 inches are forecast along and north 
  of Interstate 80. Locally higher amounts of 5 inches or 
  greater are possible if thunderstorms develop and move over 
  the same locations. 

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove
debris before the heavy rain arrives.

&&

$$
983 
WGUS61 KPHI 281924
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
324 PM EDT Sat Oct 28 2017

NJZ001-007-008-PAZ054-055-061-062-291000-
/O.CON.KPHI.FF.A.0008.171029T1600Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
324 PM EDT Sat Oct 28 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON 
THROUGH LATE SUNDAY NIGHT...

The Flash Flood Watch continues for

* Portions of northern New Jersey and northeastern Pennsylvania, 
  including the following areas, in northern New Jersey, Morris, 
  Sussex, and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and
  Northampton. 

* From Sunday afternoon through late Sunday night

* Moderate to heavy rainfall is expected develop from south to 
  north Sunday afternoon and continue into Sunday night. 
  Rainfall amounts of 2 to 4 inches are forecast along and north 
  of Interstate 80. Locally higher amounts of 5 inches or 
  greater are possible if thunderstorms develop and move over 
  the same locations. 

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead 
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove 
debris before the heavy rain arrives.

&&

$$
594 
WGUS61 KPHI 290729
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
329 AM EDT Sun Oct 29 2017

NJZ009-010-012>027-PAZ070-071-104>106-291530-
/O.EXB.KPHI.FF.A.0008.171029T1600Z-171030T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-Delaware-
Philadelphia-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Pennsville, Glassboro, Camden, 
Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, 
Hammonton, Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
329 AM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH IN EFFECT FROM NOON EDT TODAY THROUGH THIS
EVENING...

The National Weather Service in Mount Holly has expanded the

* Flash Flood Watch to include portions of New Jersey and 
  southeast Pennsylvania, including the following areas, in New 
  Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, 
  Coastal Atlantic, Coastal Ocean, Cumberland, Eastern Monmouth, 
  Gloucester, Hunterdon, Mercer, Middlesex, Northwestern 
  Burlington, Ocean, Salem, Somerset, Southeastern Burlington, 
  and Western Monmouth. In southeast Pennsylvania, Delaware, 
  Eastern Montgomery, Lower Bucks, Philadelphia, and Upper 
  Bucks. 

* From noon EDT today through this evening

* Rain will overspread the area this morning. The rain will be
  heavy at times this afternoon and at least into the early
  evening. Rainfall amounts will generally be between 1 and 3
  inches. However, a band of locally heavy rain with embedded
  thunderstorms is expected to setup somewhere between the
  Delaware Valley and the New Jersey coast. Locations underneath
  this band could receive 3 to 5 inches of rain.

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove
debris before the heavy rain arrives.

&&

$$

NJZ001-007-008-PAZ054-055-061-062-291530-
/O.CON.KPHI.FF.A.0008.171029T1600Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
329 AM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON EDT TODAY
THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of northern New Jersey and Pennsylvania, including 
  the following areas, in northern New Jersey, Morris, Sussex, 
  and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and 
  Northampton. 

* From noon EDT today through late tonight

* Rain will overspread the area this morning. The rain will be
  heavy at times this afternoon and tonight. Rainfall amounts 
  will generally be between 1 and 3 inches. However, a band of 
  locally heavy rain with embedded thunderstorms is expected to 
  setup either over northeastern Pennsylvania or northern New 
  Jersey. Locations underneath this band could receive 3 to 5 
  inches of rain.

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove
debris before the heavy rain arrives.

&&

$$
JRK
018 
WGUS61 KPHI 291951
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
351 PM EDT Sun Oct 29 2017


NJZ001-007-008-PAZ054-055-061-062-300400-
/O.CON.KPHI.FF.A.0008.000000T0000Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
351 PM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of northern New Jersey and Pennsylvania, including 
  the following areas, in northern New Jersey, Morris, Sussex, 
  and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and 
  Northampton. 

* Through late tonight

* Rain will continue and will be heavy at times tonight. Rainfall
  amounts will generally be between 1 and 3 inches. However, a few
  bands of locally heavy rains could develop expected to setup  
  either over northeastern Pennsylvania or northern New Jersey. 
  Locations underneath this band could receive 3 to 5 inches of 
  rain. 

* Heavy rainfall occurring in short period of time would result in
  rapidly rising water levels along streams and creeks. Poor
  drainage, which is common this time of year due to leaf debris,
  could exacerbate flooding. Localized roadway flooding is 
  possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove
debris before the heavy rain arrives.

&&

$$

NJZ009-010-012>027-PAZ070-071-104>106-300400-
/O.CON.KPHI.FF.A.0008.000000T0000Z-171030T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-Delaware-
Philadelphia-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Pennsville, Glassboro, Camden, 
Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, 
Hammonton, Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
351 PM EDT Sun Oct 29 2017

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

The Flash Flood Watch continues for

* Portions of New Jersey and southeast Pennsylvania, including 
  the following areas, in New Jersey, Atlantic, Atlantic Coastal 
  Cape May, Camden, Cape May, Coastal Atlantic, Coastal Ocean, 
  Cumberland, Eastern Monmouth, Gloucester, Hunterdon, Mercer, 
  Middlesex, Northwestern Burlington, Ocean, Salem, Somerset, 
  Southeastern Burlington, and Western Monmouth. In southeast 
  Pennsylvania, Delaware, Eastern Montgomery, Lower Bucks, 
  Philadelphia, and Upper Bucks. 

* Until midnight EDT tonight

* Rain will continue tonight and it will be heavy at times at
  least into the early evening. Rainfall amounts will generally be
  between 1 and 3 inches. However, bands of locally heavy rain
  with are expected to setup somewhere between the Delaware 
  Valley and the New Jersey coast. Locations underneath this band 
  could receive 3 to 5 inches of rain. 

* Heavy rainfall occurring in short period of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

Check for blocked drainages caused by fallen leaves and remove
debris before the heavy rain arrives.

&&

$$
403 
WGUS61 KPHI 292102
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
502 PM EDT Sun Oct 29 2017

NJZ001-007-008-PAZ054-055-061-062-300400-
/O.CON.KPHI.FF.A.0008.000000T0000Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
502 PM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM EDT MONDAY...

The Flash Flood Watch continues for

* Portions of northern New Jersey and Pennsylvania, including 
  the following areas, in northern New Jersey, Morris, Sussex, 
  and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and 
  Northampton. 

* Until 4 AM EDT Monday.

* Rain will continue, heavy at times, through tonight. Rainfall
  amounts will generally be 1 to 3 inches, however a few bands of
  locally heavy rain could develop either over northeastern 
  Pennsylvania or northern New Jersey. Locations underneath this 
  band could receive 3 to 5 inches of rain. 

* Heavy rainfall occurring in short periods of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

NJZ009-010-012>027-PAZ070-071-104>106-300400-
/O.CON.KPHI.FF.A.0008.000000T0000Z-171030T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-Delaware-
Philadelphia-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Pennsville, Glassboro, Camden, 
Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, 
Hammonton, Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
502 PM EDT Sun Oct 29 2017

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

The Flash Flood Watch continues for

* Portions of New Jersey and southeast Pennsylvania, including 
  the following areas, in New Jersey, Atlantic, Atlantic Coastal 
  Cape May, Camden, Cape May, Coastal Atlantic, Coastal Ocean, 
  Cumberland, Eastern Monmouth, Gloucester, Hunterdon, Mercer, 
  Middlesex, Northwestern Burlington, Ocean, Salem, Somerset, 
  Southeastern Burlington, and Western Monmouth. In southeast 
  Pennsylvania, Delaware, Eastern Montgomery, Lower Bucks, 
  Philadelphia, and Upper Bucks. 

* Until midnight EDT tonight.

* Rain will continue heavy at times at least through this evening.
  Rainfall amounts will generally be 1 to 3 inches, however bands
  of locally heavy rain are expected to setup somewhere between 
  the Delaware Valley and the New Jersey coast. Locations 
  underneath this band could receive 3 to 5 inches of rain. 

* Heavy rainfall occurring in short periods of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
679 
WGUS61 KPHI 300352
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
1152 PM EDT Sun Oct 29 2017

NJZ009-010-012>027-PAZ070-071-104>106-300500-
/O.EXP.KPHI.FF.A.0008.000000T0000Z-171030T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-Delaware-
Philadelphia-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Flemington, Somerville, New Brunswick, 
Freehold, Sandy Hook, Trenton, Pennsville, Glassboro, Camden, 
Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, 
Hammonton, Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
1152 PM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH WILL EXPIRE AT MIDNIGHT EDT TONIGHT...

The Flash Flood Watch for portions of New Jersey and southeast
Pennsylvania will expire at midnight EDT tonight. Although showers
remain possible overnight, the heaviest rainfall is moving out of
the region. Therefore, the flash flood watch will be allowed to
expire as scheduled.

$$

NJZ001-007-008-PAZ054-055-061-062-300800-
/O.CON.KPHI.FF.A.0008.000000T0000Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
1152 PM EDT Sun Oct 29 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM EDT MONDAY...

The Flash Flood Watch continues for

* Portions of northern New Jersey and Pennsylvania, including 
  the following areas, in northern New Jersey, Morris, Sussex, 
  and Warren. In Pennsylvania, Carbon, Lehigh, Monroe, and 
  Northampton. 

* Until 4 AM EDT Monday

* Rain will continue, heavy at times, through tonight. Additional
  rainfall totals up to an inch are possible. Combined with
  rainfall that occurred throughout this evening, the threat for 
  flash flooding remains through the early morning hours. 

* Heavy rainfall occurring in short periods of time would result 
  in rapidly rising water levels along streams and creeks. Poor 
  drainage, which is common this time of year due to leaf 
  debris, could exacerbate flooding. Localized roadway flooding 
  is possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

CMS
444 
WGUS61 KPHI 300752
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
352 AM EDT Mon Oct 30 2017

NJZ001-007-008-PAZ054-055-061-062-300900-
/O.EXP.KPHI.FF.A.0008.000000T0000Z-171030T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Morris-Carbon-Monroe-Lehigh-Northampton-
Including the cities of Newton, Washington, Morristown, 
Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton
352 AM EDT Mon Oct 30 2017

...FLASH FLOOD WATCH WILL EXPIRE AT 4 AM EDT EARLY THIS MORNING...

The Flash Flood Watch for portions of northern New Jersey and
Pennsylvania will expire at 4 AM EDT early this morning. Although
showers remain possible through the morning hours, the heaviest
rainfall has ended, and flooding is no longer expected to pose a
threat. Therefore, the flash flood watch will be allowed to
expire.

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 28, 4:26 AM EDTGale WatchPHI11 hr
Oct 28, 3:42 PM EDTGale WarningPHI48 hr

Nearby

Flash Flood Watches in New Jersey, 2017Flash Flood Watches in Pennsylvania, 2017Every flash flood watch in 2017

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.