Winter storm warnings cover different parts of Utah, Oregon, Washington, Wyoming and Idaho, hugely affecting travel.

KSL meteorologist Matt Johnson explained the Christmas storm was too warm for valley snow in some parts of the state, which models indicated could happen. More importantly, it pushed out the high-pressure ridge over the state, opening the door for more precipitation this week.

A snow storm is set to blast the upper Midwest and northern Great Plains late Thursday into Friday. See the forecast.

Vigilance and preparation are important, say forecasters at the NWS, as wintery weather brings hazardous travel conditions.

A winter storm warning for snow accumulations up to 20 inches is forecast for Oregon’s high Cascade Mountain passes into Tuesday.

Will New York City see snow on the first day of winter? Here's what you need to know, including timing, impacts and predictions.

It won't be a White Christmas for the Puget Sound region immediately surrounding Seattle, but the Cascades will see plenty of snow over Wednesday and Thursday. Snow levels drop to 3,000 feet, which could make driving and holiday travel across mountain passes difficult.

The wintry weather comes as a storm moves eastward from the middle Mississippi and Ohio Valleys to the East Coast Thursday, the service reported. The storm has prompted both winter weather warnings and advisories in several Wisconsin counties including Waushara, Manitowoc, Door and Kewaunee.