A stalled stationary boundary within a very moist airmass provided a focusing mechanism for several rounds of heavy rain that resulted in widespread flash flooding across northeast New Jersey. The Caldwell, NJ ASOS recorded 4.92 inches of rain, and multiple other stations across northeast New Jersey received between 2.5 inches and 4 inches of precipitation. The Little Falls area of Passaic County was particularly hard hit when rising water from the Peckman River swept away numerous cars from the Route 46 Chrysler, Jeep, Dodge dealership.

Flash Flood in UNION, NEW JERSEY
From 11-AUG-18 06:40:00 to 11-AUG-18 08:01:00 (EST-5)
Location: FANWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread flooding reported across the town of Fanwood, including two water rescues from vehicles.

Flash Flood in UNION, NEW JERSEY
From 11-AUG-18 06:40:00 to 11-AUG-18 08:01:00 (EST-5)
Location: SCOTCH PLAINS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread flooding was reported across the town of Scotch Plains, including two water rescues from vehicles.

Flash Flood in HUDSON, NEW JERSEY
From 11-AUG-18 07:31:00 to 11-AUG-18 08:01:00 (EST-5)
Location: EAST NEWARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Frank E. Rogers Boulevard was under water near the PATH station in Harrison.

Flash Flood in BERGEN, NEW JERSEY
From 11-AUG-18 07:50:00 to 11-AUG-18 09:00:00 (EST-5)
Location: FAIRVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Cars were stranded on River Road in Edgewater due to flash flooding.

Flash Flood in HUDSON, NEW JERSEY
From 11-AUG-18 07:51:00 to 11-AUG-18 09:00:00 (EST-5)
Location: JERSEY CITY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Manhole covers were being pushed up resulting in flash flooding on Danforth Avenue in Jersey City.

Flash Flood in HUDSON, NEW JERSEY
From 11-AUG-18 08:00:00 to 11-AUG-18 09:00:00 (EST-5)
Location: HOBOKEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several roads around the city of Hoboken were flooded and impassable.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 15:55:00 to 11-AUG-18 17:00:00 (EST-5)
Location: PACKANACK LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

The intersection of Gina Marie Court and Lake Drive East was flooded and impassable in Packanack Lake.

Flash Flood in ESSEX, NEW JERSEY
From 11-AUG-18 16:00:00 to 11-AUG-18 17:00:00 (EST-5)
Location: CALDWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The intersection of Bloomfield Avenue and Ryerson Avenue in Caldwell was closed due to flooding.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 16:40:00 to 11-AUG-18 17:00:00 (EST-5)
Location: SOUTH PATERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

I-80 flooded in both directions at Exit 59 (Market Street) in Paterson.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 16:44:00 to 11-AUG-18 17:00:00 (EST-5)
Location: CLIFTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding closed all lanes on US 46 westbound at NJ 20 in Clifton.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 17:00:00 to 11-AUG-18 17:00:00 (EST-5)
Location: CLIFTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route 46 flooded in both directions west of Piaget Avenue in Clifton.

Flash Flood in BERGEN, NEW JERSEY
From 11-AUG-18 17:07:00 to 11-AUG-18 17:37:00 (EST-5)
Location: CARLSTADT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All lanes closed due to flooding on NJ 17 southbound at Moonachie Avenue in Wood-Ridge.

Flash Flood in ESSEX, NEW JERSEY
From 11-AUG-18 17:30:00 to 11-AUG-18 18:30:00 (EST-5)
Location: GLEN RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding reported throughout the town of Verona.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 17:42:00 to 11-AUG-18 18:30:00 (EST-5)
Location: TOTOWA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on US 46 closed all lanes in both directions at Union Boulevard (NJ 62) in Totowa.

Flash Flood in BERGEN, NEW JERSEY
From 11-AUG-18 17:45:00 to 11-AUG-18 18:30:00 (EST-5)
Location: ROCHELLE PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding closed the I-80 westbound ramp to the Garden State Parkway (Exit 62) in Saddle Brook.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 17:48:00 to 11-AUG-18 18:30:00 (EST-5)
Location: TOTOWA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All lanes of US 46 closed in both directions due to flooding east of McBride Avenue in Little Falls.

Flash Flood in ESSEX, NEW JERSEY
From 11-AUG-18 15:50:00 to 11-AUG-18 17:50:00 (EST-5)
Location: MONTCLAIR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Peckman River at Verona rose above its flood stage of 3.5 feet at 4:50pm EDT. The river continued to rise above its moderate flood stage of 4.0 feet (4:55pm EDT) and major flood stage of 5.0 feet (5:10pm EDT) before cresting at a height of 6.36 feet at 5:35pm EDT. The river fell back below flood stage at 6:50pm EDT. The crest of 6.36 feet was within about 0.2 feet of the record crest at this location of 6.6 feet.

Flash Flood in ESSEX, NEW JERSEY
From 11-AUG-18 17:40:00 to 11-AUG-18 20:30:00 (EST-5)
Location: BELWOOD PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Third River at Bloomfield rose above its flood stage of 6.0 feet at 6:40pm EDT, crested at a height of 7.15 feet at 7:40pm EDT, then fell back below flood stage at 9:30pm EDT.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 18:00:00 to 11-AUG-18 18:30:00 (EST-5)
Location: GREAT NOTCH
Flood cause: Heavy Rain
Property damage: 3.20M
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding from the Peckman River impacted the Party City and Best Buy shopping centers as well as the Planet Fitness gym in Woodland Park. Cars were underwater in the Best Buy parking lot. Overall, approximately 210 homes, 70 businesses, and 22 parked cars were impacted by flooding in Woodland Park.

Flash Flood in ESSEX, NEW JERSEY
From 11-AUG-18 18:00:00 to 11-AUG-18 18:30:00 (EST-5)
Location: GLEN RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash flooding inundated portions of the Montclair Film Festival at 505 Bloomfield Avenue in Montclair. Both the cinema and education center were damaged when the current forced open doors to the building.

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 16:55:00 to 11-AUG-18 17:00:00 (EST-5)
Location: ALLWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route 3 was closed in both directions at the Garden State Parkway due to flooding in Clifton. In addition, the Garden State Parkway was flooded southbound at NJ 3 (Exit 153).

Flash Flood in PASSAIC, NEW JERSEY
From 11-AUG-18 18:00:00 to 11-AUG-18 18:30:00 (EST-5)
Location: LITTLE FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Multiple cars parked at the Route 46 Chrysler Jeep Dodge dealer along the Peckman River in Little Falls were swept into the river when it flooded.
Media reports later indicated that a total of 42 cars were swept away from the Chrysler Jeep Dodge dealership and that an additional 200 cars were damaged due to the flooding at the McGuire Buick dealership next door. Overall, approximately 190 homes and numerous vehicles were impacted by flood waters in Little Falls, with 32 homes deemed uninhabitable. All of the uninhabitable homes were located in the Jackson Park area.