further development of thunderstorms. Ahead of these storms, surface heating from days of above-average temperatures (exceeding ) and a moist air mass provided significant instability, another factor favoring thunderstorm formation. Over the following hours, an isolated thunderstorm developed just outside the watch area and intensified. At 2:46 p.m. EDT, the National Weather Service (NWS) office in Upton, New York issued a severe thunderstorm warning for much of the Tri-State Region. The storm was noted as having winds in excess of 60 mph (95 km/h) as it tracked east at 30 mph (45 km/h). Beginning in Bergen County, New Jersey, a line of wind damage took shape due to the storm as it moved ever closer to New York City. The storm continued to produce damage north of the city but the core entered the Bronx just before 3:00 p.m. EDT. At 2:55 p.m. EDT, a tornado touched down around 5901 Palisades Avenue along the east bank of the Hudson River. According to a resident who lived near where the tornado began, the funnel cloud preceding the tornado developed over the river. Tracking southeast, the tornado impacted a few structures, shattering windows and damaging roofs. The scale of damage to these structures was consistent with an EF1 tornado with winds around 100 mph (155 km/h) on the Enhanced Fujita Scale. The system continued through the Bronx for roughly five minutes before it lifted near the intersection of Riverdale Avenue and 254th Street, about from where it began. Continuing across southern New York, the thunderstorm continued to produce wind damage through Suffolk County before moving offshore around 4:05 p.m. EDT. Impact and aftermath The thunderstorm that spawned the tornado left a trail of wind damage from northeastern New Jersey through Long Island along its nearly two-hour existence. Strong wind gusts, reaching 65 mph (100 km/h) in some areas, downed numerous trees and power lines across Bergen County. Several roads were also blocked after large trees toppled onto them. In Pedricktown, a large tree fell on a home and broke through the roof, allowing heavy rain to fall inside the structure. Similar damage took place in the Bronx where trees fell on cars, streets and power lines. Along the northern edge of the storm, strong winds in Yonkers also downed trees and power lines. In Nassau and Suffolk Counties, winds reached 60 mph (95 km/h) before the storm finally moved offshore. The tornado