This post is being updated with new information.


Driving wind, snow and whiteout conditions will smack the Northeast starting Monday night. It’s the only major winter storm of the season for the I-95 corridor so far, and it’s going to be high-impact.

At least a foot of snow is in the forecast from Philadelphia to Maine, and if the most intense forecast comes to fruition, two feet of snow could fall on New York City as winds gust to 50 mph. On Monday afternoon, the National Weather Service extended blizzard warnings to include nearly all of eastern Pennsylvania, northern New Jersey, New York City and western Long Island and southern Connecticut.

In New York City, winds could gust to around 50 mph as snowfall rates exceed 2 inches:

Impacts

The most severe impacts will be felt along the coast and just inland, where strong wind gusts will combine with snow to create whiteout conditions. It doesn’t take much snow to reduce visibility to zero when the wind is blowing steadily over 35 mph.

Blizzard (whiteout) conditions will make travel extremely dangerous in the areas under a blizzard warning. On top of that, heavy accumulating snow will make roads impassable and may even bring down power lines. Wind gusts will lead to additional power outages.

When a blizzard warning is issued, it means “severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely.” The National Weather Service simply advises not to travel during blizzard conditions, but if you absolutely need to be on the road, take a survival kit and blankets with you. If you are stranded in heavy snow or reduced visibility, do not leave your car.

Coastal flooding is likely from Delaware to Cape Cod. Water levels may reach 2 to 3 feet above normal during Tuesday’s high tide. Shoreline roads will flood and coastal homes may be flooded. Road closures are likely in these areas.

A coastal flood advisory is in effect for the New York City area, most of Long Island and the Connecticut shoreline. A coastal flood warning has been issued for the shorelines of Suffolk and Nassau counties on Long Island, where water levels are expected to be the highest.

Timing

Precipitation — all kinds, including rain, sleet and snow — will push into the Washington, D.C., region Monday evening, probably after rush hour. Light snow will arrive in Philadelphia and New York City by midnight, then Connecticut around 3 a.m.

Once precipitation starts, expect it to continue for the next 18 hours. At times, sleet and even rain will mix in with the snow, though it’s difficult to say exactly when and where that will happen.

A blizzard is predicted to hit the East Coast this week, and cities from Washington D.C. to Boston are prepping for snowy road conditions and travel disruptions (Reuters)

Snow accumulation

Each office of the National Weather Service posts its own forecast map, which you can see below along with the Capital Weather Gang forecast for the D.C.-Baltimore region.

Forecasts for select locations:

  • Portland, Maine — 12-18 inches
  • Boston — 12-18 inches
  • Worcester, Mass. — 18-24 inches
  • Hartford, Conn. — 12-18 inches
  • New York City — 18-24 inches
  • Long Island — 12-18 inches
  • Philadelphia — 8-12 inches
  • Baltimore — 6-12 inches
  • Washington, D.C. — 2-6 inches