A "bomb cyclone" is forecast to bring heavy snow, high winds and life-threatening flooding to the Pacific Northwest in the next few days.

In a world getting used to extreme weather, 2023 is starting out bonkers. Meteorologists are saying it's typical weather weirdness, with a boost from human-caused climate change.

More than 200 million people — about 60% of the U.S. population — were under a winter weather advisory or warning on Friday, the National Weather Service said. Nearly 5,000 flights have been canceled.

Nationwide, thousands of flights were canceled or delayed. In some places, temperatures dropped more than 30 degrees in an hour. Wind chills reached well below zero. Inches of snow fell.

Regions across the U.S. are expected to get record low temperatures, wind chills and heavy snow, which could make for dangerous conditions for travel and simply being outside.

Record snow in parts of the Northeast left thousands without power.

Flooding was reported across the San Francisco Bay Area while the National Weather Service's Sacramento office warned of "potentially historic rain."