The National Weather Service has released an updated map of the estimated snowfall totals expected across the U.S. this weekend.

More than a foot of snow is possible in several states, including Connecticut, Massachusetts, New York and Pennsylvania.

Major East Coast cities, including Boston, New York City and Washington, D.C., are also expected to see at least 12 inches of snow.

More than 3,000 flights have been delayed or canceled so far today.

More than 2,500 flights within, into or out of the U.S. have been delayed so far on Friday, while more than 540 have been canceled, according to FlightAware.

Further travel delays are expected as the winter storm moves across the U.S.

The National Weather Service has released an updated map of the winter weather watches, warnings and advisories in effect across the U.S.

The ASPCA has released a series of tips on how to protect animals during this weekend’s severe winter storm.

Residents who see pets outside without proper shelter should contact their local law enforcement, the organization said.

Dog owners should also consider jackets or sweaters for short-haired pets. Paw booties can also help protect them from salt and antifreeze products on sidewalks.

Freezing rain across the U.S. could knock out power to millions of people this weekend.

Here’s how it works — and why officials are urging residents to prepare themselves:

This weekend’s major winter storm has forced several college basketball teams to reschedule their matches this weekend.

The National Weather Service has released an updated map forecasting temperatures across the U.S.

Several states could see high temperatures in the negatives today. Wind chills could bring temperatures down as low as -50 degrees Fahrenheit (-45 degrees Celsius) in some states this weekend.

“Widespread aviation hazards” are expected this afternoon as a damaging winter storm barrels across the U.S., according to the National Weather Service.

Many airports are expected to be impacted, and travelers are already experiencing delays and cancelations.

More than 1,800 flights into, out of or within the U.S. have been delayed so far on Friday, while nearly 500 flights have been canceled, according to FlightAware.

President Donald Trump appeared to question the ongoing climate crisis in a Truth Social post shared Friday ahead of this weekend’s severe winter storm.

“Record Cold Wave expected to hit 40 States. Rarely seen anything like it before. Could the Environmental Insurrectionists please explain — WHATEVER HAPPENED TO GLOBAL WARMING???” Trump wrote.

Experts say climate change can actually contribute to higher snow levels. This is because a warming atmosphere can lead to more water evaporation, and warm air can hold more moisture, according to the Environmental Defense Fund.

“That lays the foundation for more snow: When there’s more moisture in the air, that moisture can fall as snow when conditions are right, making snowstorms more intense,” the non-profit writes on its website.

Washington, D.C., has declared a state of emergency as the nation’s capital braces for the upcoming winter storm.

Some areas of D.C. could see up to a foot of snow this weekend. Nearby areas, including western Maryland and northern Virginia, could see up to 18 inches of snow.