Event Summary

Widespread rain developed just north of a warm front that remained nearly stationary just south of the area. Scattered thunderstorms produced torrential rain that caused significant and serious urban flash flooding across New York, Bronx, and Southern Westchester Counties. Less serious flooding occurred across Northwest Queens and Rockland Counties. Flash flooding crippled mass transit at the height of the morning rush hour in the New York Metro area. During the afternoon, torrential rain caused urban flash flooding across parts of Western and Central Suffolk County. Around 2 feet of water covered Main Street in Northport and up to 4 feet of water flooded many roads across Central Suffolk County , mainly in a band from Shirley north across Manorville to Wading River, where the heaviest rain fell. In New York County, parts of many roads such as FDR Drive, Harlem River Drive,Henry Hudson Parkway, 12th Ave. and West Side Highway were forced to close. Subway service was severely disrupted as 3 to 5 feet of water collected at subway station locations. Fifty-two inches of water was measured at the 6 line station at Cypress Ave. A 10 to 20 foot section of the northbound platform on the 6 line at 28th street crumbled and washed away. In Bronx County, in addition to many road closures, the Metro-North Railroad system was forced to close in Mott Haven, South Bronx, which went under water. Ten trains carrying thousands of passengers were stranded. In Southern Westchester County, parts of many roads such as Bronx River Parkway, Hutchinson River Parkway, and Saw Mill River Parkway were forced to close. Here are selected rainfall amounts for: Queens County: 2.64 inches of rain was measured at LaGuardia Airport. Some less serious flooding of roads and subway stations occurred across parts of Northwest Queens. Westchester County: 2.30 inches was measured at White Plains. Rockland County: from 3.16 inches at Nanuet to 3.31 inches at New City. Suffolk County: 6.10 inches at Manorville, 4.03 inches at South Setauket, 3.76 inches at the NWS Office in Upton and 3.48 inches in Riverhead.