Get ready for a weather whiplash! A pattern change will bring a big warmup across much of the country early this week. Monday will be the coldest day along the East Coast before warmer air gradually moves into the region. Areas in the Northern Plains that saw temperatures below zero this past weekend will now see highs soar into the 40s by Tuesday and Wednesday. Expect snow to rapidly melt this week as temperatures remain well above average.

After last week's record river flooding in Washington state, more atmospheric rivers are taking aim at the West Coast this week, set to bring heavy rain, mountain snow to Oregon and California, too.

As bitterly cold temperatures and snow kept many people indoors, a tiny kitten was suffering outside in Melville, New York. The kitten, apparently separated from its mom and siblings, mewed in distress until someone came to the rescue. See how a good Samaritan saved the feline.

Ever wonder how Hallmark Christmas movies transform sun-soaked streets into sparkling winter wonderlands? Producer Andrew Gernhard reveals the mix of old-school techniques, digital effects and on-the-fly weather tricks that make every scene feel cozy, festive and perfectly snowy — no matter the season.

Several cities across the Northeast saw their first measurable snow of the season this weekend.