The National Weather Service posted winter storm watches or warnings from New England to Montana, with blizzard warnings over the Dakotas and Minnesota. “Presidents Day will be a great day for shoveling snow,” Weather Channel meteorologist Mark Ressler told USA Today.

Meanwhile, in Arizona, cities like Flagstaff — where bicycles could be seen blanketed with more than a foot of snow on the Northern Arizona University campus Sunday— were reported to have received more than a foot of snow over the weekend. Unusually low temperatures blew across the greater Phoenix area, forcing some events to close and people indoors. And to the west, Southern California was drying out after being pelted by two weekend rainstorms that left snow in mountains as low as 2,500 feet.

Central Oregon's forecast calls for a 20 to 30 percent chance of snow each day this week. Get the details.

— From wire reports