At a Glance

  • A strong East Coast storm is forecast to develop late this weekend.
  • This storm will receive a boost of moisture and energy from a tropical disturbance currently in the Caribbean.
  • Damaging winds and flooding rainfall are potential threats in the Northeast Sunday into Monday.

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.

It is possible that this low pressure system could undergo a process called “Bombogenesis” according to the National Weather Service. This process is a rapid deepening of pressures across the area, which rapidly increases winds near the center of the storm.

 

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 Depression Eighteen in the western Caribbean.

Storm Setup

An area of low pressure will intensify near the East Coast while tapping tropical moisture Sunday into Monday. This will result in a powerful storm system that could cause wind damage and flooding rainfall.

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: Tropical moisture from Tropical Depression Eighteen 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.