Alert archive / New Jersey / Flash Flood Watches in 2016

Flash Flood Watch 4, NWS Philadelphia/Mount Holly

July 31, 20167 counties in Pennsylvania; 8 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 31, 2016, 12:28 PM EDT for 7 counties in Pennsylvania; 8 counties in New Jersey. It was in force for 38 hr.

The area

The counties it named.

The facts

Issued
Jul 31, 2016, 12:28 PM EDT (16:28 UTC)
Expired
Aug 2, 2016, 2:19 AM EDT
In force
38 hr
Issued by
NWS Philadelphia/Mount Holly
Flood severity
None

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 16:30 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, 4.5 hours before the alert went out and 184 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 12:00Z on 2016-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 325 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2016-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.19395878Sfc1 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
325 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
544 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

199 
WGUS61 KPHI 311628
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1228 PM EDT SUN JUL 31 2016


NJZ001-007>010-012-015-010430-
/O.NEW.KPHI.FF.A.0004.160731T1628Z-160802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON
1228 PM EDT SUN JUL 31 2016

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A

* FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL NEW JERSEY... 
  NORTHERN NEW JERSEY AND NORTHWEST NEW JERSEY...INCLUDING THE 
  FOLLOWING AREAS...IN CENTRAL NEW JERSEY...MERCER. IN NORTHERN 
  NEW JERSEY...MIDDLESEX...MORRIS...SOMERSET...SUSSEX AND 
  WARREN. IN NORTHWEST NEW JERSEY...HUNTERDON. 

* THROUGH MONDAY EVENING

* SHOWERS AND THUNDERSTORMS HAVE PRODUCED SEVERAL ROUNDS OF VERY
  HEAVY RAIN ACROSS A GOOD PORTION OF THE WATCH AREA. RAINFALL
  TOTALS LOCALLY OF FOUR TO AROUND SIX INCHES OF RAIN HAVE FALLEN
  OVER THE PAST 24 HOURS. A FEW ADDITIONAL ROUNDS OF SHOWERS AND
  THUNDERSTORMS ARE LIKELY THROUGH TOMORROW EVENING ACROSS THE
  WATCH AREA. ADDITIONAL RAINFALL FROM THUNDERSTORMS COULD LEAD TO
  FLASH FLOODING ESPECIALLY IN AREAS THAT HAVE RECEIVED THE
  HEAVIEST RAINFALL. A LULL IN THE SHOWER AND THUNDERSTORM
  COVERAGE WILL LIKELY OCCUR OVERNIGHT.

* ADDITONAL RAINFALL TOTALS WILL VARY OVER SHORT DISTANCES. THE
  POTENTIAL EXISTS FOR MANY LOCATIONS TO SEE OVER ONE INCH OF NEW
  RAINFALL THROUGH TOMORROW EVENING. LOCALIZED ADDITONAL RAINFALL
  AMOUNTS OF A FEW INCHES CAN NOT BE RULED OUT.

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. 

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A HISTORY
OF BASEMENT FLOODING, MONITOR YOUR SUMP PUMP FOR PROPER OPERATION
AND IF POSSIBLE, DIRECT OUTSIDE WATER FLOW AWAY FROM YOUR HOUSE.


&&

$$

GAINES
5 follow-up statements
590 
WGUS61 KPHI 010013
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
813 PM EDT SUN JUL 31 2016

NJZ013-014-PAZ054-055-060>062-103>106-011200-
/O.EXA.KPHI.FF.A.0004.000000T0000Z-160802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WESTERN MONMOUTH-EASTERN MONMOUTH-CARBON-MONROE-BERKS-LEHIGH-
NORTHAMPTON-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-
LOWER BUCKS-
INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT...
PERKASIE...MORRISVILLE...DOYLESTOWN
813 PM EDT SUN JUL 31 2016

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS EXPANDED THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF CENTRAL NEW JERSEY 
  AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL 
  NEW JERSEY...EASTERN MONMOUTH AND WESTERN MONMOUTH. IN 
  PENNSYLVANIA...BERKS...CARBON...EASTERN MONTGOMERY...LEHIGH... 
  LOWER BUCKS...MONROE...NORTHAMPTON...UPPER BUCKS AND WESTERN 
  MONTGOMERY. 

* THROUGH MONDAY EVENING

* SHOWERS AND THUNDERSTORMS HAVE PRODUCED SEVERAL ROUNDS OF VERY
  HEAVY RAIN ACROSS MUCH OF THE WATCH AREA. RAINFALL TOTALS
  LOCALLY OF TWO TO FOUR INCHES HAVE FALLEN OVER THE PAST 24 TO 36
  HOURS IN SOME AREAS. ADDITIONAL ROUNDS OF SHOWERS AND
  THUNDERSTORMS ARE LIKELY THROUGH TOMORROW EVENING ACROSS THE
  WATCH AREA. RAINFALL FROM THESE SHOWERS AND THUNDERSTORMS COULD
  LEAD TO FLASH FLOODING ESPECIALLY IN AREAS THAT HAVE RECEIVED
  THE HEAVIEST RAINFALL.

* ADDITONAL RAINFALL TOTALS WILL VARY OVER SHORT DISTANCES. THE
  POTENTIAL EXISTS FOR SOME LOCATIONS TO SEE OVER ONE TO TWO
  INCHES OF NEW RAINFALL IN A SHORT AMOUNT OF TIME THROUGH
  TOMORROW EVENING. LOCALIZED ADDITONAL RAINFALL AMOUNTS OF A FEW
  INCHES CAN NOT BE RULED OUT.

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.

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A
HISTORY OF BASEMENT FLOODING... MONITOR YOUR SUMP PUMP FOR PROPER
OPERATION AND IF POSSIBLE... DIRECT OUTSIDE WATER FLOW AWAY FROM
YOUR HOUSE.

&&

$$

NJZ001-007>010-012-015-011200-
/O.CON.KPHI.FF.A.0004.000000T0000Z-160802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON
813 PM EDT SUN JUL 31 2016

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF CENTRAL NEW JERSEY...NORTHERN NEW JERSEY AND 
  NORTHWEST NEW JERSEY...INCLUDING THE FOLLOWING AREAS...IN 
  CENTRAL NEW JERSEY...MERCER. IN NORTHERN NEW JERSEY... 
  MIDDLESEX...MORRIS...SOMERSET...SUSSEX AND WARREN. IN 
  NORTHWEST NEW JERSEY...HUNTERDON. 

* THROUGH MONDAY EVENING

* SHOWERS AND THUNDERSTORMS HAVE PRODUCED SEVERAL ROUNDS OF VERY
  HEAVY RAIN ACROSS MUCH OF THE WATCH AREA. RAINFALL TOTALS
  LOCALLY OF FOUR TO SIX INCHES HAVE FALLEN OVER THE PAST 24 TO 36
  HOURS IN SOME AREAS. ADDITIONAL ROUNDS OF SHOWERS AND
  THUNDERSTORMS ARE LIKELY THROUGH TOMORROW EVENING ACROSS THE
  WATCH AREA. RAINFALL FROM THESE SHOWERS AND THUNDERSTORMS COULD
  LEAD TO FLASH FLOODING ESPECIALLY IN AREAS THAT HAVE RECEIVED
  THE HEAVIEST RAINFALL.

* ADDITONAL RAINFALL TOTALS WILL VARY OVER SHORT DISTANCES. THE
  POTENTIAL EXISTS FOR SOME LOCATIONS TO SEE OVER ONE TO TWO
  INCHES OF NEW RAINFALL IN A SHORT AMOUNT OF TIME THROUGH
  TOMORROW EVENING. LOCALIZED ADDITONAL RAINFALL AMOUNTS OF A FEW
  INCHES CAN NOT BE RULED OUT.

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.

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A
HISTORY OF BASEMENT FLOODING... MONITOR YOUR SUMP PUMP FOR PROPER
OPERATION AND IF POSSIBLE... DIRECT OUTSIDE WATER FLOW AWAY FROM
YOUR HOUSE.

&&

$$
046 
WGUS61 KPHI 010830
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 AM EDT MON AUG 1 2016

NJZ001-007>010-012>015-PAZ054-055-060>062-103>106-012200-
/O.CON.KPHI.FF.A.0004.000000T0000Z-160802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-WESTERN MONTGOMERY-EASTERN MONTGOMERY-
UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...
TRENTON...JIM THORPE...STROUDSBURG...READING...ALLENTOWN...
BETHLEHEM...EASTON...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
430 AM EDT MON AUG 1 2016

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE 
  FOLLOWING AREAS...IN NEW JERSEY...EASTERN MONMOUTH... 
  HUNTERDON...MERCER...MIDDLESEX...MORRIS...SOMERSET...SUSSEX... 
  WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS... 
  CARBON...EASTERN MONTGOMERY...LEHIGH...LOWER BUCKS...MONROE... 
  NORTHAMPTON...UPPER BUCKS AND WESTERN MONTGOMERY. 

* THROUGH THIS EVENING

* SHOWERS AND THUNDERSTORMS OVER THE WEEKEND PRODUCED VERY HEAVY
  RAIN AND SERIOUS FLOODING ACROSS PARTS OF THE WATCH AREA. FOUR
  TO SIX INCHES OF RAIN FELL IN SOME LOCATIONS. ADDITIONAL SHOWERS
  AND THUNDERSTORMS ARE LIKELY THROUGH THIS EVENING ACROSS THE
  WATCH AREA. RAINFALL FROM THESE SHOWERS AND THUNDERSTORMS COULD
  LEAD TO MORE FLASH FLOODING ESPECIALLY IN AREAS THAT HAVE
  ALREADY RECEIVED HEAVY RAINFALL.

* THE POTENTIAL EXISTS THROUGH THIS EVENING FOR SOME LOCATIONS TO
  SEE ONE TO TWO INCHES OF NEW RAINFALL IN LESS THAN AN HOUR.
  LOCALIZED ADDITONAL RAINFALL AMOUNTS OF A FEW INCHES CANNOT BE
  RULED OUT.

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.

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A
HISTORY OF BASEMENT FLOODING... MONITOR YOUR SUMP PUMP FOR PROPER
OPERATION AND IF POSSIBLE... DIRECT OUTSIDE WATER FLOW AWAY FROM
YOUR HOUSE.

&&

$$

AMC
099 
WGUS61 KPHI 011921
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
321 PM EDT MON AUG 1 2016

NJZ001-007>010-012>015-PAZ054-055-060>062-103>106-020300-
/O.EXT.KPHI.FF.A.0004.000000T0000Z-160802T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-WESTERN MONTGOMERY-EASTERN MONTGOMERY-
UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...
TRENTON...JIM THORPE...STROUDSBURG...READING...ALLENTOWN...
BETHLEHEM...EASTON...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
321 PM EDT MON AUG 1 2016

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

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE
  FOLLOWING AREAS...IN NEW JERSEY...EASTERN MONMOUTH...
  HUNTERDON...MERCER...MIDDLESEX...MORRIS...SOMERSET...SUSSEX...
  WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS...
  CARBON...EASTERN MONTGOMERY...LEHIGH...LOWER BUCKS...MONROE...
  NORTHAMPTON...UPPER BUCKS AND WESTERN MONTGOMERY.

* THROUGH LATE TONIGHT

* SHOWERS AND THUNDERSTORMS OVER THE WEEKEND PRODUCED VERY HEAVY
  RAIN AND SERIOUS FLOODING ACROSS PARTS OF THE WATCH AREA. FOUR
  TO SIX INCHES OF RAIN FELL IN SOME LOCATIONS. ADDITIONAL SHOWERS
  AND THUNDERSTORMS ARE LIKELY TONIGHT ACROSS THE WATCH AREA.
  RAINFALL FROM THESE SHOWERS AND THUNDERSTORMS COULD LEAD TO MORE
  FLASH FLOODING ESPECIALLY IN AREAS THAT HAVE ALREADY RECEIVED
  HEAVY RAINFALL.

* THE POTENTIAL EXISTS THROUGH TONIGHT FOR SOME LOCATIONS TO SEE
  ONE TO TWO INCHES OF NEW RAINFALL IN LESS THAN AN HOUR. LOCALIZED
  ADDITONAL RAINFALL AMOUNTS OF A FEW INCHES CANNOT BE RULED OUT.

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.

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A HISTORY
OF BASEMENT FLOODING... MONITOR YOUR SUMP PUMP FOR PROPER OPERATION
AND IF POSSIBLE... DIRECT OUTSIDE WATER FLOW AWAY FROM YOUR HOUSE.

&&

$$
797 
WGUS61 KPHI 020106
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
906 PM EDT MON AUG 1 2016

NJZ001-007>010-012>015-PAZ054-055-060>062-103>106-021000-
/O.CON.KPHI.FF.A.0004.000000T0000Z-160802T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-WESTERN MONTGOMERY-EASTERN MONTGOMERY-
UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...
TRENTON...JIM THORPE...STROUDSBURG...READING...ALLENTOWN...
BETHLEHEM...EASTON...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
906 PM EDT MON AUG 1 2016

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM EDT TUESDAY...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE 
  FOLLOWING AREAS...IN NEW JERSEY...EASTERN MONMOUTH... 
  HUNTERDON...MERCER...MIDDLESEX...MORRIS...SOMERSET...SUSSEX... 
  WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS... 
  CARBON...EASTERN MONTGOMERY...LEHIGH...LOWER BUCKS...MONROE... 
  NORTHAMPTON...UPPER BUCKS AND WESTERN MONTGOMERY. 

* UNTIL 6 AM EDT TUESDAY

* SHOWERS AND THUNDERSTORMS OVER THE WEEKEND PRODUCED VERY HEAVY
  RAIN AND SERIOUS FLOODING ACROSS PARTS OF THE WATCH AREA. FOUR
  TO SIX INCHES OF RAIN FELL IN SOME LOCATIONS. ADDITIONAL SHOWERS
  AND THUNDERSTORMS ARE LIKELY THIS EVENING INTO THE OVERNIGHT
  HOURS ACROSS PORTIONS OF THE WATCH AREA. RAINFALL FROM THESE
  SHOWERS AND THUNDERSTORMS COULD LEAD TO MORE FLASH FLOODING
  ESPECIALLY IN AREAS THAT HAVE ALREADY RECEIVED HEAVY RAINFALL.

* THE POTENTIAL STILL EXISTS THROUGH TONIGHT FOR SOME LOCATIONS
  TO SEE ONE TO TWO INCHES OF NEW RAINFALL IN LESS THAN AN HOUR.
  LOCALIZED ADDITONAL RAINFALL AMOUNTS OF A FEW INCHES CANNOT BE
  RULED OUT.

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.

BASEMENT FLOODING IS POSSIBLE DUE TO HEAVY RAIN FALLING ON SOILS
ALREADY SATURATED FROM PREVIOUS STORMS. IF YOUR HOME HAS A
HISTORY OF BASEMENT FLOODING... MONITOR YOUR SUMP PUMP FOR PROPER
OPERATION AND IF POSSIBLE... DIRECT OUTSIDE WATER FLOW AWAY FROM
YOUR HOUSE.

&&

$$
131 
WGUS61 KPHI 020619
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
219 AM EDT TUE AUG 2 2016

NJZ001-007>010-012>015-PAZ054-055-060>062-103>106-020730-
/O.CAN.KPHI.FF.A.0004.000000T0000Z-160802T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-WESTERN MONTGOMERY-EASTERN MONTGOMERY-
UPPER BUCKS-LOWER BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...
TRENTON...JIM THORPE...STROUDSBURG...READING...ALLENTOWN...
BETHLEHEM...EASTON...COLLEGEVILLE...POTTSTOWN...NORRISTOWN...
LANSDALE...CHALFONT...PERKASIE...MORRISVILLE...DOYLESTOWN
219 AM EDT TUE AUG 2 2016

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND PENNSYLVANIA
HAS BEEN CANCELLED.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 6:31 AM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia44 min
Jul 31, 7:19 AM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia3 hr
Jul 31, 7:22 AM EDTAreal Flood AdvisoryPHIBucks4 hr
Jul 31, 12:34 PM EDTAreal Flood AdvisoryPHIMonroe, Northampton4 hr
Jul 31, 6:35 PM EDTAreal Flood AdvisoryPHIMonroe4 hr
Jul 30, 8:15 PM EDTAreal Flood AdvisoryPHIHunterdon4 hr
Jul 30, 10:19 PM EDTAreal Flood WarningPHIMercer, Middlesex, Somerset7 hr
Jul 30, 10:32 PM EDTAreal Flood WarningPHIHunterdon4 hr
Jul 30, 10:54 PM EDTSpecial Weather StatementPHICumberland, Gloucester, Salem36 min
Jul 31, 6:49 AM EDTRiver Flood WarningPHISomerset25 hr
Jul 31, 7:04 AM EDTFlash Flood WarningPHIBurlington, Ocean4 hr
Jul 31, 7:48 AM EDTAreal Flood AdvisoryPHIBurlington, Ocean4 hr
Jul 31, 8:21 AM EDTFlash Flood WarningPHIHunterdon7 hr
Jul 31, 9:59 AM EDTSpecial Marine WarningPHI61 min
Jul 31, 10:08 AM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland4 hr
Jul 31, 10:17 AM EDTAreal Flood AdvisoryPHIMiddlesex, Morris, Somerset4 hr
Jul 31, 11:04 AM EDTAreal Flood WarningPHIHunterdon, Somerset9 hr
Jul 31, 11:53 AM EDTFlash Flood WarningPHIHunterdon, Somerset4 hr
Jul 31, 12:44 PM EDTAreal Flood AdvisoryPHIMonmouth4 hr
Jul 31, 2:06 PM EDTFlash Flood WarningPHIMonmouth4 hr
Jul 31, 2:41 PM EDTSpecial Weather StatementPHIMercer49 min
Jul 31, 2:53 PM EDTSpecial Weather StatementPHIOcean22 min
Jul 31, 7:34 PM EDTAreal Flood AdvisoryPHIWarren4 hr

Nearby

Flash Flood Watches in New Jersey, 2016Flash Flood Watches in Pennsylvania, 2016Every flash flood watch in 2016

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.