An anomolous slow moving upper level low pressure system in combination with a weak surface cold front and local seabreezes triggered thunderstorms producing torrential rainfall which led to flash flooding on Long Island and in portions of New York City and the Lower Hudson Valley.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 18:13:00 to 15-AUG-08 18:28:00 (EST-5)
Location: FLEETWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Hutchinson River Pkwy. was closed in both directions near Lincoln Ave. in Pelham due to flooding.

Flash Flood in ROCKLAND, NEW YORK
From 15-AUG-08 16:30:00 to 15-AUG-08 16:56:00 (EST-5)
Location: WEST NYACK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous roads were flooded in Nanuet. The intersection of North Middletown Rd. and Atlantic Ave. in Nanuet was closed at 5:40 EDT due to flooding. Germonds Road in Clarkstown (Rockland Lake) was also closed due to flooding.

Flash Flood in SUFFOLK, NEW YORK
From 15-AUG-08 13:45:00 to 15-AUG-08 14:45:00 (EST-5)
Location: SOUND BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Many streets were flooded on the border of Sound Beach and Rocky Point.

Flash Flood in SUFFOLK, NEW YORK
From 15-AUG-08 14:30:00 to 15-AUG-08 14:45:00 (EST-5)
Location: RONKONKOMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Old Nichols Rd. and Gibbs Pond Rd. in Nesconset were both closed due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 18:13:00 to 15-AUG-08 18:28:00 (EST-5)
Location: DUNWOODIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The southbound Saw Mill River Pkwy. was closed at Cross County Pkwy. in Yonkers due to flooding.

Flash Flood in NASSAU, NEW YORK
From 15-AUG-08 14:00:00 to 15-AUG-08 14:15:00 (EST-5)
Location: SANDS PT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office

Basements were flooded in Port Washington. Route 101 was also flooded.

Flash Flood in SUFFOLK, NEW YORK
From 15-AUG-08 14:30:00 to 15-AUG-08 14:45:00 (EST-5)
Location: LAKE RONKONKOMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The intersection of Hawkins Ave., Smith Rd., and Gatelot Ave., also known as Five Corners, in Lake Ronkonkoma was closed due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 16:43:00 to 15-AUG-08 18:28:00 (EST-5)
Location: DUNWOODIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Saw Mill River Pkwy. near McLean Ave. in Yonkers was closed due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 17:00:00 to 15-AUG-08 18:28:00 (EST-5)
Location: CHAUNCEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Broadway was closed at Five Corners and at Olina Ave. in Hastings-On-Hudson due to flooding.

Flash Flood in NASSAU, NEW YORK
From 15-AUG-08 17:25:00 to 15-AUG-08 17:40:00 (EST-5)
Location: LAFFINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Severe flooding was reported in Locust Valley and Glen Cove by Nassau County Emergency Management.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 17:25:00 to 15-AUG-08 18:28:00 (EST-5)
Location: BRONXVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several entrance ramps were closed on the Hutchinson River Pkwy. and the Cross County Pkwy. in Mount Vernon due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 18:00:00 to 15-AUG-08 18:28:00 (EST-5)
Location: SCARSDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Westchester Office of Emergency Management reported that there was up to 5 feet of standing water on some side streets in New Rochelle.

Flash Flood in NEW YORK, NEW YORK
From 15-AUG-08 18:10:00 to 15-AUG-08 18:56:00 (EST-5)
Location: CENTRAL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

New York City Office of Emergency Management reported that all lanes were flooded on the Henry Hudson Bridge between Manhattan and The Bronx.

Flash Flood in BRONX, NEW YORK
From 15-AUG-08 17:00:00 to 15-AUG-08 17:15:00 (EST-5)
Location: WILLIAMS BRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The Bronx River Pkwy. was closed at E. 233rd St. in Woodlawn due to flooding.

Flash Flood in WESTCHESTER, NEW YORK
From 15-AUG-08 17:00:00 to 15-AUG-08 18:28:00 (EST-5)
Location: MT VERNON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

South 5th Ave., Westchester Ave. and the Bronx River Pkwy. at Oak Street; all in Mount Vernon; were closed due to flooding. There was also several feet of water on Macquesten Pkwy. in Mount Vernon, which ran off onto the Metro North Harlem Line tracks at Fleetwood Station suspending service.

Flash Flood in NASSAU, NEW YORK
From 15-AUG-08 13:30:00 to 15-AUG-08 14:15:00 (EST-5)
Location: JERICHO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Various spots on Jericho Tpke. in Syosset were impassable due to flooding.

Flash Flood in SUFFOLK, NEW YORK
From 15-AUG-08 19:00:00 to 15-AUG-08 19:15:00 (EST-5)
Location: HALESITE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

New York Ave. was closed in Halesite due to flooding.