Seacoast New Hampshire and southern Maine are bracing for the largest snowfall of 2025 to date, expected Sunday night ahead of an Arctic blast.

While more sunshine is expected today, it will be paired with bitter cold temperatures. Most locations will struggle to reach the mid single digits with wind chills staying well below zero. Improvements are made by the end of the week as the Arctic air recedes.

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to millions.

Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low temperatures as residents along the East Coast contend with a thick blanket of snow — and more snowfall in the forecast.

Presidential inaugurations have been moved indoors several times due to bitter cold. It happened most recently in 1985 as Reagan began his second term.

Winter weather is expected in Maine early next week, followed by frigid temperatures. Forecasters expect snow to accumulate Sunday afternoon into the evening. The Portland area could see anywhere from 4-8 inches,

The NWS has warned of possible snow squalls as Arctic air spreads south and east from the Rockies Friday through next week.

Classes are canceled Wednesday for Maine South High School in Park Ridge, after a sprinkler line water pipe burst before the school day started. Students are being allowed to stay in common areas of the school for the day.

A winter storm prompted a National Weather Service office in Louisiana to issue a first-ever blizzard warning. The storm is causing dangerous conditions from Texas to North Carolina.

Southern California was forecast to face more dangerous winds on Wednesday, but could get some badly needed rain this weekend, which could create new challenges like toxic ash runoff.

Heavy snow is expected to blanket large portions of the Eastern U.S. while much of the country will endure dangerously cold temperatures in the coming days.