Winter Storm Warning criteria for US revamped by National Weather Service

National Weather Service on Instagram: "If you live in the West, you’re likely to see the words “atmospheric river” pop up in the forecast over the next several days. This is not a new term; in fact it was coined in 1994! But what is an atmospheric river, and what weather hazards can you expect? Meteorologist Haley Thiem explains."

Find out how the National Weather Service prepares for severe weather

National Weather Service to issue new cold weather alerts this winter