Rapidly Intensifying Coastal Storm Could Impact the Region This Weekend

We are closely monitoring a rapidly strengthening coastal storm expected to develop off the East Coast this weekend. While confidence in the exact track and impacts remains low, the system has the potential to bring moderate to significant winter weather impacts to parts of the region, including snow, strong winds, and coastal flooding. Forecast guidance […]

We are closely monitoring a rapidly strengthening coastal storm expected to develop off the East Coast this weekend. While confidence in the exact track and impacts remains low, the system has the potential to bring moderate to significant winter weather impacts to parts of the region, including snow, strong winds, and coastal flooding.

Forecast guidance continues to show low pressure rapidly developing off the southeastern U.S. coast on Saturday before intensifying and moving north and east Saturday night into Sunday. This storm will strengthen as a powerful upper level disturbance rotates around the base of a large-scale trough over the eastern United States and interacts with a strong temperature contrast along the coastline. This setup is favorable for rapid intensification, which could lead to high-impact weather depending on the storm’s eventual track.

One of the reasons forecast confidence remains limited is ongoing difficulty within some weather models in accurately handling the storm’s development. Several models are struggling with an issue known as convective feedback. This occurs when the model generates unrealistic high vertical velocities that are too strong or widespread, which in turn creates artificial areas of low pressure that should not exist. These false low pressure centers can disrupt the overall storm structure, leading to errors in the placement of the main low and causing the precipitation shield to appear displaced or unrealistic compared to what may actually occur.

As a result, small but important details such as where the heaviest snow sets up and how far inland precipitation reaches remain uncertain. This has contributed to notable spread among model solutions, particularly regarding how close the storm tracks to the coast.

If the storm tracks closer to shore, impacts could begin as early as late Saturday, with the most significant conditions occurring Saturday night into Sunday morning. With very cold air firmly in place at both the surface and aloft, any precipitation that reaches the region would almost certainly fall as snow.

Probabilistic snowfall data suggests a moderate risk for accumulating snow. The likelihood of at least 2 inches of snow is around 50 percent near the coast and roughly 40 percent along the I-95 corridor, with lower probabilities farther inland. The chance of 6 inches or more increases closer to the coast, reaching around 40 percent, while remaining near 30 percent around the urban corridor. These probabilities remain subject to change as confidence improves.

Regardless of snowfall totals, increasing winds appear likely. Northerly to northeasterly winds are expected to strengthen Saturday night into Sunday, with gusts of 25 to 35 mph inland and up to 50 mph along the coast. A closer track could result in even stronger winds, raising the risk for power outages, minor structural damage, and hazardous marine conditions. The strong wind field may also contribute to coastal flooding as water is pushed toward the shoreline.

By Sunday evening, the storm is expected to rapidly pull away to the northeast, with quieter but cold conditions settling in for early next week.

This storm remains one to watch closely over the coming days. Forecast details should become clearer as additional data is sampled and models better resolve the system. Residents are encouraged to stay informed and prepared for potential winter weather impacts this weekend.