A stationary front near the area forced torrential thunderstorms in a tropical airmass resulting in widespread flash flooding in NY. The first round of thunderstorms occurred early in the morning on July 16th. Another round of thunderstorms occurred later in the afternoon. The tropical airmass had CAPE values 1500 - 2000 J/kg with PWATs 2.2-2.4 inches. The torrential thunderstorms produced rainfall rates as much as 3 inches an hour. Rainfall amounts totaled a widespread 2-4 inches across Long Island with localized spots seeing as much as 5 inches of rain.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 08:03:00 to 16-JUL-23 08:33:00 (EST-5)
Location: ISLIP TERRACE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on Southern State Parkway westbound at Exit 44W with all lanes closed.

Flash Flood in ORANGE, NEW YORK
From 16-JUL-23 05:45:00 to 16-JUL-23 06:15:00 (EST-5)
Location: MONROE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portion of Gilbert Street in the village of Monroe closed due to flooding.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 15:58:00 to 16-JUL-23 16:28:00 (EST-5)
Location: SCUTTLEHOLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several feet of water in basement on Meadow Court.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 16:27:00 to 16-JUL-23 16:57:00 (EST-5)
Location: EAST HAMPTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

N Main Street closed due to flooding between Collins Ave and Cedar Street.

Flash Flood in QUEENS, NEW YORK
From 16-JUL-23 12:06:00 to 16-JUL-23 12:36:00 (EST-5)
Location: LITTLE NECK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portion of the Cross island Parkway near Northern Blvd closed due to flooding.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 08:44:00 to 16-JUL-23 09:14:00 (EST-5)
Location: NORTH BABYLON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on NY 231 Northbound between Garnet Street, Ryder Avenue, and Weeks Road with all lanes closed.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 07:54:00 to 16-JUL-23 08:24:00 (EST-5)
Location: ISLIP TERRACE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on NY 27 in both directions at Exit 46 from Carleton Ave to Connetquot Ave with all lanes closed.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 08:03:00 to 16-JUL-23 08:33:00 (EST-5)
Location: EAST ISLIP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Road closure with major flooding on Sunrise Highway between West of Route 111 to and through Heckshire State Parkway with multiple reports of persons stranded in vehicles with several local fire departments performing water rescues. 5.23 inches of rain in 2 hours.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 15:42:00 to 16-JUL-23 16:12:00 (EST-5)
Location: EAST HAMPTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Disabled vehicle trapped in flood waters in East Hampton.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 15:50:00 to 16-JUL-23 16:20:00 (EST-5)
Location: HAMPTON PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Widespread road closures in Southampton due to flooding.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 15:30:00 to 16-JUL-23 16:00:00 (EST-5)
Location: EAST QUOGUE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Video shows impassible roadway due to flooding in East Quogue.

Flash Flood in SUFFOLK, NEW YORK
From 16-JUL-23 15:45:00 to 16-JUL-23 16:15:00 (EST-5)
Location: EAST HAMPTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Intersection of Collins Ave and N Main Street in East Hampton is underwater and impassible.

Flash Flood in WESTCHESTER, NEW YORK
From 16-JUL-23 07:15:00 to 16-JUL-23 07:45:00 (EST-5)
Location: NORTH SALEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

DOT reports flooding and road closure on NY 116 in both directions between North Road and Hunt Lane with all lanes closed.