A strong storm moving toward the coast from the west will bring damaging winds, heavy rains and flooding later today through late tonight, prompting warnings from the National Weather Service for the region, including eastern Suffolk County.

A high wind warning and a coastal flood warning are in effect this afternoon through the overnight hours. A flood watch for possible flash flooding caused by excessive rainfall is also in effect.

East winds of 25 to 35 mph with gusts up to 60 mph are expected this afternoon and evening. The high wind warning is in effect from 11 a.m. today through 6 a.m. Thursday.

Damaging winds will blow down trees and power lines, the weather service said. Widespread power outages are expected across the region, according to the warning statement. Travel will be difficult, especially for high profile vehicles, the weather service said.

An additional 2 to 2 ½ inches of rainfall is expected this morning through early Thursday, with most of the rain coming this afternoon and evening. Periods of localized heavy rain are possible this evening, with rainfall rates of ½-¾ inch per hour possible and total rainfall of 3 to 3 ½ inches in some places.

Moderate to major coastal flooding is expected during high tide cycles tonight and tomorrow morning— on the Peconic River in Riverhead, high tide is 9 p.m. tonight and 8 a.m. tomorrow. 

Two three feet of inundation above ground level is expected in vulnerable areas near the waterfront and shoreline this afternoon and tonight. Locally inundation of 3 ½ feet is possible.

Widespread flooding of vulnerable areas near the waterfront and shoreline is likely, the weather service said — including roads, parking lots, parks, lawns, and homes and businesses with basements near the waterfront. Numerous road closures are likely, and vehicles parked in vulnerable areas near the waterfront will likely become flooded, according to the weather service. Flooding will also extend inland from the waterfront along tidal rivers and bays.

Along the twin forks, breaking waves of 4 to 8 feet Wednesday evening and Thursday morning, along with elevated water levels, will result in beach erosion with damage to shoreline structures possible, the National Weather Service said. Waves splashing over bulkheads and seawalls will likely exacerbate flooding of shoreline roadways and properties.

Storm warnings are in effect for all local waters.

PSEG-LI advises residents to treat all downed wires as “live” and stay as far away from them as possible. Do not drive over or stand near any downed wire. To report a downed wire, call PSEG Long Island’s 24-hour Electric Service number at 800-490-0075 or call 911.

Report an outage and receive status updates by texting OUT to PSEGLI (773454). You can also report your outage through the PSEG-LI app or on the utility company’s website at psegliny.com/outages.

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