As millions of Americans hunker down for the winter storm, 17 states and Washington, D.C., have declared states of emergency.

The use of AI models and expanding observational technology are part of the government’s push to fill gaps in forecasting as events like this weekend’s storm underline increasing weather extremes.

Track the winter storm as it's forecasted to bring heavy snow and extremely cold weather to the U.S., reaching millions from the southern U.S. to the Northeast.

How much snow will Delaware get? Check the latest National Weather Service winter storm predictions.

The major storm is set to hit starting on Jan. 23 and will stretch into the weekend, spreading snow and ice from the southern Plains to the Northeast.

More than half of the United States is about to face one of the most sprawling and menacing winter storms in years, one that threatens to deliver a historic blow of snow and ice. The long-lasting storm begins Friday and,