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Storm Map: Major Storm May Bring Wet Snow and Heavy Rain

Forecast period: November 9–15, 2026

A potentially significant storm system is developing on the long-range weather maps for later this week, with the greatest impacts expected Friday into Saturday. This system could bring a combination of heavy rainfall, colder temperatures, and accumulating wet snow across portions of the eastern United States and southern Canada.

The setup features colder air pressing southward into the Great Lakes and Northeast while a developing area of low pressure tracks along the Mid-Atlantic coastline. This contrast between the colder air to the north and milder, moisture-rich air farther south could produce a broad area of precipitation, with rain transitioning to wet snow across parts of the interior Northeast.

Great Lakes, Ohio Valley, and Northeast

The primary area to watch for wet snow extends from portions of the Ohio Valley and Great Lakes northeastward through Pennsylvania, New York, northern New England, and southern Canada.

As colder air moves into the region, precipitation could change from rain to a wet snow mixture, particularly across higher elevations and interior locations. Some areas could see accumulating snowfall, with the potential for slushy travel conditions and locally heavier amounts where colder air becomes established.

The current storm map highlights a broad area of potential wet snow. The exact rain-to-snow transition will be especially important because relatively small changes in the storm track and temperature profile could significantly affect snowfall totals.

Mid-Atlantic and Southeast: Heavy Rain Potential

Farther south, the storm is expected to produce primarily rain, with the potential for periods of heavy rainfall across parts of the Mid-Atlantic and Southeast.

Areas from Virginia and the Carolinas northward toward the Washington, D.C., region could experience periods of moderate to heavy rain. Localized flooding may develop, particularly in areas that receive persistent rainfall or where drainage is poor.

The position and strength of the coastal low will determine how much moisture moves inland and where the heaviest precipitation develops.

The Importance of Colder Air

One of the biggest factors with this storm will be the availability of cold air. The map indicates colder conditions developing across the Great Lakes and southern Canada, potentially allowing snow to develop farther south and east than would otherwise be expected.

If the colder air arrives sooner and becomes established, the potential for accumulating wet snow increases across the interior Northeast and portions of the Ohio Valley. If the storm tracks farther inland or colder air is delayed, more locations could experience rain or a rain-and-snow mixture.

What We Are Watching

The forecast remains several days away, so snowfall amounts, precipitation types, and the eventual storm track are still subject to change. The next several model cycles should provide a better indication of how far south the colder air will reach and whether this system develops into a more substantial winter weather event.

The Bottom Line

Friday into Saturday could bring a significant change in weather across the eastern United States. Heavy rain and localized flooding are possible farther south, while wet snow could develop across portions of the Ohio Valley, Great Lakes, interior Northeast, and southern Canada.

This is a storm worth watching closely. The potential exists for a widespread precipitation event with meaningful impacts to travel, particularly if the colder air arrives in time to support accumulating wet snow.