A powerful coastal storm with strong winds and heavy rain will impact the East Coast beginning later this weekend, likely resulting in tree damage, power outages and flooding. A significant wind event is possible Sunday or Monday. 

(Bombogenesis: What Happens When Low Pressure Becomes a Weather 'Bomb')

One of the ingredients for this coastal storm is a powerful jet stream disturbance sweeping through the eastern states this weekend that will help induce the formation of a strong low-pressure system near or off the mid-Atlantic and Northeast coastline. This storm system will also receive an injection of moisture and energy from Tropical Storm Philippe, currently located south of Florida.

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The National Weather Service office in Boston noted in its Saturday morning discussion that this is an unusual and truly strong, potentially dangerous storm system for late October.

Here's an overview of the timing and possible impacts for this storm. But keep in mind, given the complicated setup, forecast details still remain uncertain.

Storm Timing

Overall, this East Coast storm will be a quick-mover as it races northward this weekend into Monday.

• Saturday Evening: Tropical moisture from Tropical Storm Philippe will fuel heavy rain in South Florida before being pulled into the developing East Coast storm. Rain will also begin to push into the interior Northeast and Appalachians.
• Sunday: Heavy rain and increasing winds will begin to affect locations from the Outer Banks of North Carolina into the Northeast by Sunday morning.
• Sunday night: Peak impacts from the storm begin to ramp up in the Northeast during this time, including the potential for damaging winds and heavy rainfall.
• Monday: Potentially damaging winds and heavy rain may continue over parts of New England and upstate New York, at least during the first half of the day.

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