Heavy rain associated with weakening Hurricane Henri caused significant flash flooding in New Jersey on the morning of August 22.  Most of the flood damage was confined to the central part of the state.  Rainfall amounts were as high as 4.0 to 9.5 inches.

Flash Flood in WARREN, NEW JERSEY
From 22-AUG-21 05:30:00 to 22-AUG-21 06:00:00 (EST-5)
Location: BLOOMSBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The Musconetcong River overflowed its banks, flooding a section of NJ Route 173 in Greenwich Township.

Flash Flood in MORRIS, NEW JERSEY
From 22-AUG-21 00:00:00 to 22-AUG-21 01:30:00 (EST-5)
Location: PARSIPPANY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US Route 46 was closed in Parsippany-Troy Hills due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: HELMETTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Widespread and significant flash flooding occurred in Helmetta.  Many residents were evacuated from their homes by boat.  Numerous roads in the town were inundated.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 02:30:00 to 22-AUG-21 08:30:00 (EST-5)
Location: EAST BRUNSWICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Numerous roads were closed and vehicles were stuck in the flood waters in South River.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 05:15:00 to 22-AUG-21 09:30:00 (EST-5)
Location: NORTH BRUNSWICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding occurred along Lawrence Brook on the border between New Brunswick and East Brunswick.

Flash Flood in OCEAN, NEW JERSEY
From 22-AUG-21 01:30:00 to 22-AUG-21 05:00:00 (EST-5)
Location: SURF CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Widespread street flooding on Long Beach Island from Harvey Cedars to Surf City.  Sections of Long Beach Boulevard were closed.

Flash Flood in OCEAN, NEW JERSEY
From 22-AUG-21 02:00:00 to 22-AUG-21 05:00:00 (EST-5)
Location: MANAHAWKIN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Two vehicles were trapped in flood waters near the intersection of Leeward Road and Breakers Drive in Stafford Township, requiring water rescues.

Flash Flood in SOMERSET, NEW JERSEY
From 22-AUG-21 01:50:00 to 22-AUG-21 03:00:00 (EST-5)
Location: GREEN BROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US Route 22 in North Plainfield was closed due to flooding.

Flash Flood in HUNTERDON, NEW JERSEY
From 22-AUG-21 03:45:00 to 22-AUG-21 05:30:00 (EST-5)
Location: FLEMINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

US Route 202 in Raritan Township was under water.

Flash Flood in SOMERSET, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 06:00:00 (EST-5)
Location: CLYDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

South Middlebush Road was closed at Blackwells Mills Road in Franklin Township due to flooding.

Flash Flood in SOMERSET, NEW JERSEY
From 22-AUG-21 05:15:00 to 22-AUG-21 06:30:00 (EST-5)
Location: ROCKY HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Flooding resulted in road closures near the Millstone River in Rocky Hill and Montgomery Township.

Flash Flood in SOMERSET, NEW JERSEY
From 22-AUG-21 06:15:00 to 22-AUG-21 06:45:00 (EST-5)
Location: BLAWENBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Rock Brook overflowed its banks in Montgomery Township, resulting in the closure of Hollow Road to the north of Grandview Road.

Flash Flood in HUNTERDON, NEW JERSEY
From 22-AUG-21 04:10:00 to 22-AUG-21 06:45:00 (EST-5)
Location: REAVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flooding occurred along the Neshanic River in Raritan Township.

Flash Flood in MERCER, NEW JERSEY
From 22-AUG-21 04:15:00 to 22-AUG-21 08:00:00 (EST-5)
Location: MERCERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A water rescue took place on Paxson Avenue in Hamilton Township.

Flash Flood in MERCER, NEW JERSEY
From 22-AUG-21 06:15:00 to 22-AUG-21 08:00:00 (EST-5)
Location: TRENTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Water rescues took place on South Broad Street and on Mercer Street in Trenton.

Flash Flood in MERCER, NEW JERSEY
From 22-AUG-21 03:30:00 to 22-AUG-21 09:00:00 (EST-5)
Location: WINDSOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US Route 130 was closed at Church Street in Robbinsville Township due to flooding.

Flash Flood in MONMOUTH, NEW JERSEY
From 22-AUG-21 01:40:00 to 22-AUG-21 03:00:00 (EST-5)
Location: NAVESINK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

NJ Route 36 was closed in part of Middletown Township and Highlands due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 02:30:00 to 22-AUG-21 08:30:00 (EST-5)
Location: EAST BRUNSWICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

NJ Route 18 was closed at Cranbury Road in East Brunswick Township due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 02:30:00 to 22-AUG-21 05:30:00 (EST-5)
Location: EDISON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US Route 1 in Edison Township was closed due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:15:00 to 22-AUG-21 06:30:00 (EST-5)
Location: NEW BRUNSWICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Jersey Avenue in New Brunswick and North Brunswick Township was closed due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: SPOTSWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Widespread and significant flash flooding occurred in Spotswood.  Many roads were closed including Old Stage Road at Summerhill Road.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 02:30:00 to 22-AUG-21 05:30:00 (EST-5)
Location: SAYREVILLE JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding occurred on the Garden State Parkway southbound, north of Interchange 123 in Sayreville.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 06:00:00 (EST-5)
Location: MILLTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Widespread and significant flash flooding occurred in Milltown.  Numerous roads were closed.  Vehicles were submerged in the flood waters.  A business and several houses were damaged.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:30:00 to 22-AUG-21 09:00:00 (EST-5)
Location: PLAINSBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A vehicle was trapped in flood waters on Woodland Drive in Plainsboro Township, requiring a water rescue.  Another water rescue took place on Dey Road.  Plainsboro Pond overflowed, closing Maple Avenue.

Flash Flood in MONMOUTH, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: ENGLISHTOWN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Widespread and significant flash flooding occurred in Manalapan Township and in Englishtown.  Numerous roads in Manalapan Township were closed including Spotswood-Englishtown Road, Wilson Avenue, Sobechko Road, Union Hill Road and Conmack Lane.  Main Street in Englishtown was closed due to flooding.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: PROSPECT PLAINS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Widespread and significant flash flooding occurred in Cranbury Township.  Numerous roadways were inundated and there were several water rescues.  Brainerd Lake overflowed its banks, closing Main Street.  A water rescue took place on Old Trenton Road.

Flash Flood in MERCER, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: EDINBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Widespread and significant flash flooding occurred in East Windsor Township and in Hightstown.  Numerous roads were closed due to flooding.  Water rescues took place along Hankins Road near Woodland Drive, and at the intersection of Mercer Street and Airport Road in East Windsor Township.  US Route 130 was closed to the south of Princeton-Hightstown Road in East Windsor Township.  Franklin Street was closed to the east of North Main Street in Hightstown.

Flash Flood in MERCER, NEW JERSEY
From 22-AUG-21 05:15:00 to 22-AUG-21 08:00:00 (EST-5)
Location: GROVERS MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The Millstone River overflowed its banks in West Windsor Township, inundating several roads.  Grovers Mill Pond overflowed its banks in West Windsor Township, flooding several roads and damaging nearby buildings.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: JAMESBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Widespread and significant flash flooding occurred in Jamesburg.  Homes and businesses were severely damaged by the flood waters.  Many roads were inundated and numerous water rescues took place.  Some of the worst of the flooding occurred along Forsgate Drive in the area of Railroad Avenue.  Homes near Manalapan Brook were evacuated.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:15:00 to 22-AUG-21 09:00:00 (EST-5)
Location: DEANS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Widespread flash flooding occurred in South Brunswick Township.  US Route 130 was closed between Georges Road and Deans Rhode Hall Road.  A water rescue took place on Ridge Road.  US Route 1 was closed at Raymond Road.  Herrod Boulevard was closed with vehicles stranded in the flood waters, requiring several water rescues.

Flash Flood in MIDDLESEX, NEW JERSEY
From 22-AUG-21 03:00:00 to 22-AUG-21 09:00:00 (EST-5)
Location: PROSPECT PLAINS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Widespread and significant flash flooding occurred in Monroe Township.  About 95 houses in the Rossmoor development were impacted by the flood waters, with many of the structures sustaining quite a bit of damage.  Numerous roads in the township were closed and many vehicles were stranded in the flood waters.  A section of NJ Route 33 to the east of Applegarth Road was closed.