Alert archive / New Jersey / Flash Flood Watches in 2021

Flash Flood Watch 3, NWS Philadelphia/Mount Holly

July 7, 20214 states

NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 7, 2021, 3:32 PM EDT for 4 states. It took effect at Jul 8, 2021, 9:57 AM EDT. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued
Jul 7, 2021, 3:32 PM EDT (19:32 UTC)
In effect from
Jul 8, 2021, 9:57 AM EDT
Expired
Jul 9, 2021, 9:37 AM EDT
In force
24 hr
Issued by
NWS Philadelphia/Mount Holly
Flood severity
None
All 33 counties

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, 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), 67 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 220 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 2021-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 568 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 2021-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939Sfc1 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
568 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
901 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

688 
WGUS61 KPHI 071932
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
332 PM EDT Wed Jul 7 2021

NJZ001-007-PAZ054-055-060>062-080745-
/O.NEW.KPHI.FF.A.0003.210708T1600Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
Including the cities of Jim Thorpe, Allentown, Newton, Washington, 
Bethlehem, Stroudsburg, Reading, and Easton
332 PM EDT Wed Jul 7 2021

...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH 
FRIDAY MORNING...

The National Weather Service in Mount Holly has issued a

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

* From Thursday afternoon through Friday morning.

* Heavy rainfall will develop over portions of eastern PA and NW New 
  Jersey ahead of Tropical Storm Elsa Thursday afternoon. The heavy 
  rains will see 1 to 2 inches with locally higher amounts and then 
  will see another 1 to 2 inches with the heavy rainfall associated 
  with Tropical Storm Elsa Thursday evening through the overnight
  hours.

* Heavy rain in short periods of time will cause the potential for 
  streams and creeks to quickly rise out of their banks as well as 
  the potential for flash flooding in areas of poor drainage.

$$

DEZ001>004-MDZ012-015-019-020-NJZ008>010-012>027-PAZ070-071-101>106-
080745-
/O.NEW.KPHI.FF.A.0003.210708T2100Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-
Talbot-Caroline-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-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Glassboro, Denton, Jackson, Flemington, 
Media, Philadelphia, Doylestown, Chalfont, Morristown, Pennsville, 
Honey Brook, Centreville, Norristown, Georgetown, Mount Holly, Ocean 
City, Cherry Hill, Moorestown, Freehold, Pottstown, Hammonton, Cape 
May Court House, Oxford, Kennett Square, Sandy Hook, Chestertown, 
Morrisville, West Chester, Millville, Wilmington, New Brunswick, 
Dover, Trenton, Lansdale, Wharton State Forest, Atlantic City, 
Collegeville, Long Beach Island, Camden, Easton, Perkasie, Rehoboth 
Beach, and Somerville
332 PM EDT Wed Jul 7 2021

...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH 
FRIDAY MORNING...

The National Weather Service in Mount Holly has issued a

* Flash Flood Watch for portions of Delaware...northeast Maryland...
  New Jersey...and southeast Pennsylvania...including the following 
  areas...in Delaware...Delaware Beaches, Inland Sussex, Kent, and 
  New Castle. In northeast Maryland...Caroline, Kent MD, Queen 
  Annes, and Talbot. In New Jersey...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, and Western Monmouth. In 
  southeast Pennsylvania...Delaware, Eastern Chester, Eastern 
  Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western 
  Chester, and Western Montgomery.

* From Thursday afternoon through Friday morning.

* Tropical Storm Elsa will move across portions of DelMarVa, New 
  Jersey, and eastern PA Thursday night, bringing heavy rainfall to 
  the region. Expected rainfall totals across DelMarVa and New 
  Jersey range from 2 to 3 inches, with locally higher amounts up to 
  5 inches possible. Further west of the I-95 corridor could expect 
  to see 1-2 inches, with locally higher amounts to 3 inches 
  possible.

* Heavy rain in short periods of time will cause the potential for 
  streams and creeks to quickly rise out of their banks as well as 
  the potential for flash flooding in urban areas.

$$

Deal
6 follow-up statements
817 
WGUS61 KPHI 080734
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
334 AM EDT Thu Jul 8 2021

NJZ001-007-PAZ054-055-060>062-081945-
/O.CON.KPHI.FF.A.0003.210708T1600Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
Including the cities of Jim Thorpe, Allentown, Newton, Washington, 
Bethlehem, Stroudsburg, Reading, and Easton
334 AM EDT Thu Jul 8 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON EDT TODAY THROUGH 
FRIDAY MORNING...

The Flash Flood Watch continues for

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

* From Noon EDT today through Friday morning.

* Heavy rainfall will develop over portions of eastern Pennsylvania 
  and northwestern New Jersey ahead of Tropical Storm Elsa this 
  afternoon. The area will see 1 to 2 inches of rain with locally 
  higher amounts at that time. Another 1 to 2 inches of rain is 
  expected with Tropical Storm Elsa tonight into early Friday 
  morning.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in areas of poor drainage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

DEZ001>004-MDZ012-015-019-020-NJZ008>010-012>027-PAZ070-071-101>106-
081945-
/O.CON.KPHI.FF.A.0003.210708T2100Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-
Talbot-Caroline-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-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Glassboro, Denton, Jackson, Flemington, 
Media, Philadelphia, Doylestown, Chalfont, Morristown, Pennsville, 
Honey Brook, Centreville, Norristown, Georgetown, Mount Holly, Ocean 
City, Cherry Hill, Moorestown, Freehold, Pottstown, Hammonton, Cape 
May Court House, Oxford, Kennett Square, Sandy Hook, Chestertown, 
Morrisville, West Chester, Millville, Wilmington, New Brunswick, 
Dover, Trenton, Lansdale, Wharton State Forest, Atlantic City, 
Collegeville, Long Beach Island, Camden, Easton, Perkasie, Rehoboth 
Beach, and Somerville
334 AM EDT Thu Jul 8 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS AFTERNOON THROUGH 
FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of Delaware...northeast Maryland...New Jersey...and 
  southeast Pennsylvania...including the following areas...in 
  Delaware...Delaware Beaches, Inland Sussex, Kent, and New Castle. 
  In northeast Maryland...Caroline, Kent MD, Queen Annes, and 
  Talbot. In New Jersey...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, and Western Monmouth. In southeast 
  Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, 
  Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and 
  Western Montgomery.

* From this afternoon through Friday morning.

* Tropical Storm Elsa will bring heavy rain to much of southeastern 
  Pennsylvania, eastern Maryland, Delaware and New Jersey from late 
  today into Friday morning. Rainfall totals of 2 to 4 inches are 
  expected on the coastal plain, with locally higher amounts up to 6 
  inches possible. West of the Interstate 95 Corridor, amounts 
  should range from 1 to 2 inches, with locally higher amounts to 3 
  inches possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in urban areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Iovino
671 
WGUS61 KPHI 081357
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
957 AM EDT Thu Jul 8 2021

NJZ001-007-PAZ054-055-060>062-090200-
/O.EXT.KPHI.FF.A.0003.210708T1357Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
Including the cities of Jim Thorpe, Allentown, Newton, Washington, 
Bethlehem, Stroudsburg, Reading, and Easton
957 AM EDT Thu Jul 8 2021

...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch is now in effect for

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

* Through Friday morning.

* Heavy rainfall will develop over portions of eastern Pennsylvania 
  and northwestern New Jersey ahead of Tropical Storm Elsa through 
  this afternoon. The area will see 1 to 2 inches of rain with 
  locally higher amounts at that time. Another 1 to 2 inches of rain 
  is expected with Tropical Storm Elsa tonight into early Friday 
  morning.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in areas of poor drainage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

DEZ001>004-MDZ012-015-019-020-NJZ008>010-012>027-PAZ070-071-101>106-
090200-
/O.CON.KPHI.FF.A.0003.210708T2100Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-
Talbot-Caroline-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-Delaware-
Philadelphia-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Glassboro, Denton, Jackson, Flemington, 
Media, Philadelphia, Doylestown, Chalfont, Morristown, Pennsville, 
Honey Brook, Centreville, Norristown, Georgetown, Mount Holly, Ocean 
City, Cherry Hill, Moorestown, Freehold, Pottstown, Hammonton, Cape 
May Court House, Oxford, Kennett Square, Sandy Hook, Chestertown, 
Morrisville, West Chester, Millville, Wilmington, New Brunswick, 
Dover, Trenton, Lansdale, Wharton State Forest, Atlantic City, 
Collegeville, Long Beach Island, Camden, Easton, Perkasie, Rehoboth 
Beach, and Somerville
957 AM EDT Thu Jul 8 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 PM EDT THIS AFTERNOON 
THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of Delaware...northeast Maryland...New Jersey...and 
  southeast Pennsylvania...including the following areas...in 
  Delaware...Delaware Beaches, Inland Sussex, Kent, and New Castle. 
  In northeast Maryland...Caroline, Kent MD, Queen Annes, and 
  Talbot. In New Jersey...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, and Western Monmouth. In southeast 
  Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, 
  Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and 
  Western Montgomery.

* From 5 PM EDT this afternoon through Friday morning.

* Tropical Storm Elsa will bring heavy rain to much of southeastern 
  Pennsylvania, eastern Maryland, Delaware and New Jersey from late 
  today into Friday morning. Rainfall totals of 2 to 4 inches are 
  expected on the coastal plain, with locally higher amounts up to 6 
  inches possible. West of the Interstate 95 Corridor, amounts 
  should range from 1 to 2 inches, with locally higher amounts to 3 
  inches possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in urban areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Robertson
012 
WGUS61 KPHI 090005
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
805 PM EDT Thu Jul 8 2021


DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-070-071-101>106-090815-
/O.CON.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/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-Carbon-Monroe-Berks-Lehigh-
Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Dover, Georgetown, 
Rehoboth Beach, Chestertown, Centreville, Easton, Denton, Newton,
Washington, Morristown, 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, Jim Thorpe, Stroudsburg,
Reading, Allentown, Bethlehem, Media, Philadelphia, Honey Brook, 
Oxford, West Chester, Kennett Square, Collegeville, Pottstown, 
Norristown, Lansdale, Chalfont, Perkasie, Morrisville, 
and Doylestown
805 PM EDT Thu Jul 8 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of Delaware, northeast Maryland, New Jersey, and 
  Pennsylvania, including the following areas, in Delaware, 
  Delaware Beaches, Inland Sussex, Kent, and New Castle. In 
  northeast Maryland, Caroline, Kent MD, Queen Annes, and 
  Talbot. In New Jersey, 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. 
  In Pennsylvania, Berks, Carbon, Delaware, Eastern Chester, 
  Eastern Montgomery, Lehigh, Lower Bucks, Monroe, Northampton, 
  Philadelphia, Upper Bucks, Western Chester, and Western 
  Montgomery. 

* Through Friday morning

* Tropical Storm Elsa will bring heavy rain to much of eastern 
  Pennsylvania, eastern Maryland, Delaware and New Jersey tonight 
  into Friday morning. Rainfall totals of 2 to 4 inches are 
  expected on the coastal plain, with locally higher amounts up to
  6 inches possible. West of the Interstate 95 Corridor, amounts 
  should generally range from 1 to 2 inches, with locally higher 
  amounts to 3 inches possible. 

* Heavy rain in a short period of time may cause streams and 
  creeks to rise quickly out of their banks and there is the 
  potential for flash flooding in urban areas. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Fitzsimmons
430 
WGUS61 KPHI 090726
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
326 AM EDT Fri Jul 9 2021

DEZ001>004-MDZ012-015-019-020-PAZ054-055-060>062-070-101>103-090830-
/O.CAN.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-
Talbot-Caroline-Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-
Western Chester-Eastern Chester-Western Montgomery-
Including the cities of Media, Georgetown, Denton, Honey Brook, Jim 
Thorpe, Chestertown, Allentown, West Chester, Wilmington, 
Collegeville, Pottstown, Kennett Square, Bethlehem, Stroudsburg, 
Oxford, Rehoboth Beach, Reading, Centreville, Easton, and Dover
326 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch has been cancelled for Delaware and eastern 
Maryland. The Flash Flood Watch has been cancelled for the 
Pennsylvania counties of Berks, Carbon, Chester, Delaware, Lehigh, 
Monroe, upper Montgomery and Northampton.

Flooding is no longer expected to pose a threat.

$$

NJZ001-007-091600-
/O.CON.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Warren-
Including the cities of Newton and Washington
326 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* A portion of northern New Jersey...including the following areas...
  Sussex and Warren.

* Until Noon EDT today.

* Heavy rainfall will continue this morning in parts of southeastern 
  Pennsylvania and New Jersey as Tropical Storm Elsa begins to move 
  out to sea. The area will receive 1 to 3 inches of rain with 
  locally higher amounts possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in areas of poor drainage.

$$

NJZ008>010-012>027-PAZ071-104>106-091600-
/O.CON.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-Philadelphia-Eastern
Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Glassboro, Jackson, Flemington, 
Philadelphia, Doylestown, Morristown, Pennsville, Lansdale, 
Norristown, Mount Holly, Ocean City, Cherry Hill, Moorestown, 
Freehold, Hammonton, Cape May Court House, Sandy Hook, Morrisville, 
Millville, New Brunswick, Trenton, Wharton State Forest, Atlantic 
City, Chalfont, Long Beach Island, Camden, Perkasie, and Somerville
326 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

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, Morris, Northwestern Burlington, Ocean, Salem, 
  Somerset, Southeastern Burlington, and Western Monmouth. In 
  southeast Pennsylvania...Eastern Montgomery, Lower Bucks, 
  Philadelphia, and Upper Bucks.

* Until Noon EDT today.

* Heavy rain will continue this morning in parts of southeastern 
  Pennsylvania and New Jersey as Tropical Storm Elsa begins to move 
  out to sea. The areas will receive 1 to 3 inches of rain with 
  locally higher amounts possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flash flooding in areas of poor drainage.

$$

Iovino
607 
WGUS61 KPHI 091022
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
622 AM EDT Fri Jul 9 2021

NJZ007-009-015>027-PAZ071-104>106-091130-
/O.CAN.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren-Hunterdon-Mercer-Salem-Gloucester-Camden-Northwestern
Burlington-Ocean-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape
May-Coastal Atlantic-Coastal Ocean-Southeastern Burlington-
Philadelphia-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Glassboro, Jackson, Flemington, Atlantic 
City, Philadelphia, Doylestown, Pennsville, Lansdale, Norristown, 
Mount Holly, Ocean City, Cherry Hill, Moorestown, Hammonton, Cape 
May Court House, Morrisville, Millville, Trenton, Wharton State 
Forest, Washington, Chalfont, Long Beach Island, Camden, and Perkasie
622 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch has been cancelled for the New Jersey counties 
of Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester, 
Hunterdon, Mercer, Ocean, Salem and Warren. The Flash Flood Watch 
has been cancelled for the southeastern Pennsylvania counties of 
Bucks, lower Montgomery and Philadelphia.

Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

$$

NJZ001-091600-
/O.CON.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-
Including the cities of Newton
622 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* A portion of northern New Jersey...including the following area...
  Sussex.

* Until Noon EDT today.

* Moderate to heavy rainfall will continue this morning in parts of 
  northern and central New Jersey as Tropical Storm Elsa begins to 
  move out to sea. The area will receive 1 to 2 inches of rain with 
  locally higher amounts possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flooding in areas of poor drainage.

$$

NJZ008-010-012>014-091600-
/O.CON.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris-Somerset-Middlesex-Western Monmouth-Eastern Monmouth-
Including the cities of Morristown, Somerville, New Brunswick, Sandy 
Hook, and Freehold
622 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* Portions of central New Jersey...and northern New Jersey...
  including the following areas...in central New Jersey...Eastern 
  Monmouth and Western Monmouth. In northern New Jersey...Middlesex, 
  Morris, and Somerset.

* Until Noon EDT today.

* Moderate to heavy rain will continue this morning in parts of 
  northern and central New Jersey as Tropical Storm Elsa begins to 
  move out to sea. The areas will receive 1 to 2 inches of rain with 
  locally higher amounts possible.

* Heavy rain in a short period of time may cause streams and creeks 
  to rise quickly out of their banks and there is the potential for 
  flooding in areas of poor drainage.

$$

Iovino
412 
WGUS61 KPHI 091337
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
937 AM EDT Fri Jul 9 2021

NJZ001-008-010-012>014-091445-
/O.CAN.KPHI.FF.A.0003.000000T0000Z-210709T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex-Morris-Somerset-Middlesex-Western Monmouth-Eastern Monmouth-
Including the cities of Newton, Freehold, Morristown, Somerville, 
New Brunswick, and Sandy Hook
937 AM EDT Fri Jul 9 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of central New Jersey...and 
northern New Jersey...including the following areas...in central New 
Jersey...Eastern Monmouth and Western Monmouth. In northern New 
Jersey...Middlesex, Morris, Somerset, and Sussex has been cancelled.

The Flood Watch is cancelled. Flooding is no longer expected to pose 
a threat. Please continue to heed remaining road closures.

$$

JEO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 8:16 PM EDTSpecial Weather StatementPHILehigh29 min
Jul 6, 8:29 PM EDTSevere Thunderstorm WarningPHIBucks, Lehigh, Northampton46 min
Jul 6, 8:50 PM EDTSevere Thunderstorm WarningPHIBucks40 min
Jul 6, 9:04 PM EDTSevere Thunderstorm WarningPHIBucks41 min
Jul 6, 9:10 PM EDTAreal Flood AdvisoryPHIBucks2 hr
Jul 6, 9:29 PM EDTSevere Thunderstorm WarningPHIBucks61 min
Jul 6, 9:48 PM EDTSevere Thunderstorm WarningPHIBucks57 min
Jul 6, 10:08 PM EDTSpecial Weather StatementPHIPhiladelphia37 min
Jul 6, 10:21 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery, Philadelphia39 min
Jul 7, 11:19 AM EDTTropical Storm WatchPHISussex18 hr
Jul 6, 8:03 PM EDTSpecial Weather StatementPHIBurlington, Ocean42 min
Jul 6, 8:11 PM EDTSpecial Marine WarningPHI82 min
Jul 6, 8:24 PM EDTSpecial Marine WarningPHI2 hr
Jul 6, 8:37 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Monmouth, Morris, Somerset53 min
Jul 6, 9:37 PM EDTSpecial Marine WarningPHI113 min
Jul 6, 10:50 PM EDTAreal Flood AdvisoryPHIMonmouth, Ocean2 hr
Jul 6, 10:54 PM EDTSpecial Weather StatementPHIBurlington51 min
Jul 6, 11:11 PM EDTSpecial Weather StatementPHIBurlington19 min
Jul 6, 11:30 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean45 min
Jul 6, 11:39 PM EDTSpecial Marine WarningPHI66 min
Jul 6, 11:55 PM EDTSpecial Weather StatementPHIMonmouth50 min
Jul 7, 12:01 AM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth71 min
Jul 7, 12:10 AM EDTSpecial Marine WarningPHI95 min

Nearby

Flash Flood Watches in New Jersey, 2021Flash Flood Watches in Pennsylvania, 2021Flash Flood Watches in Maryland, 2021Every flash flood watch in 2021

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.