A predecessor rainfall event resulted in flash flooding across portions of the area as moisture streaming northward ahead of Tropical Storm Elsa encountered a stationary boundary draped across the area. Rainfall amounts ranged 2-4 inches across portions of Manhattan, the Bronx, and Westchester County, with lesser amounts elsewhere. The ASOS in Central Park reported 2.27 inches of rain from this event, while the New York State Mesonet station in Fordham reported 3.55 inches.

Flash Flood in BRONX, NEW YORK
From 08-JUL-21 15:19:00 to 08-JUL-21 16:45:00 (EST-5)
Location: SPUYTEN DUYVIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All lanes were closed on the Major Deegan Expressway (I-87) southbound in Fordham due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 08-JUL-21 15:06:00 to 08-JUL-21 16:00:00 (EST-5)
Location: GREENBURGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Central Park Avenue in Yonkers was impassable due to flooding near the entrance to the old Modell's. Water was up to car doors with several vehicles stranded.

Flash Flood in WESTCHESTER, NEW YORK
From 08-JUL-21 15:21:00 to 08-JUL-21 16:00:00 (EST-5)
Location: HARTSDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All lanes were closed in both directions on the Sprain Brook Parkway in Ardsley due to flooding.

Flash Flood in NEW YORK, NEW YORK
From 08-JUL-21 14:55:00 to 08-JUL-21 16:45:00 (EST-5)
Location: CENTRAL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water was reported up to the top of a car tire on the corner of Nagle Avenue and Dyckman Street due to flooding in Washington Heights.

Flash Flood in BRONX, NEW YORK
From 08-JUL-21 15:45:00 to 08-JUL-21 16:00:00 (EST-5)
Location: SPUYTEN DUYVIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Over a dozen motorists were rescued by the NYPD on the Major Deegan Expressway at W. 179th Street in Morris Heights due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 08-JUL-21 15:48:00 to 08-JUL-21 16:45:00 (EST-5)
Location: SCARSDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The southbound Hutchinson River Parkway was closed due to flooding at Exit 13 in White Plains.

Flash Flood in NEW YORK, NEW YORK
From 08-JUL-21 16:00:00 to 08-JUL-21 16:45:00 (EST-5)
Location: CENTRAL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Significant flooding inundated the 157th Street subway station in Washington Heights.

Flash Flood in NEW YORK, NEW YORK
From 08-JUL-21 16:55:00 to 08-JUL-21 17:25:00 (EST-5)
Location: CENTRAL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Harlem River Drive was closed southbound in Washington Heights in the area of Exit 23 due to flooding.

Flash Flood in BRONX, NEW YORK
From 08-JUL-21 15:30:00 to 08-JUL-21 16:45:00 (EST-5)
Location: MOTT HAVEN JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several subway stations in the Bronx were inundated with flood waters.

Flash Flood in BRONX, NEW YORK
From 08-JUL-21 16:02:00 to 08-JUL-21 16:45:00 (EST-5)
Location: MOTT HAVEN JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Major Deegan Expressway was flooded near the Cross Bronx Expressway in Morris Heights. All lanes were blocked and vehicles were stranded.

Flash Flood in WESTCHESTER, NEW YORK
From 08-JUL-21 16:13:00 to 08-JUL-21 17:25:00 (EST-5)
Location: DUNWOODIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Saw Mill River Parkway was closed due to flooding southbound at McLean Avenue in Riverdale.