Three systems will push across the northern tier of the country this week, bringing heavy snow to the Great Lakes, Ohio Valley and Northeast.

As Storm Goretti dumped heavy snow on England, something else in the sky captivated residents and millions of people around the world as the video spread online. The sky was awash in a mysterious pink glow. Was it the northern lights or some other celestial phenomenon? Turns out the answer was much closer to home.

After record December storms collapsed roofs and sank boats, Juneau, Alaska, had been racing to dig out from a fresh round of heavy snow before the rain arrived. Two small avalanches have been triggered so far. Here's the latest.

A series of cold fronts will bring frigid arctic air into the U.S. this week into the weekend. Gusty winds will result in wind chills below zero across the Midwest and Great Lakes. The cold air will sink as far south as the Gulf Coast with lows in the 20s and 30s across Florida by the end of the week and into the weekend. Watch this video to see when the coldest air will impact you.

Fresh snow and warmer temperatures have elevated the risk of avalanches in the western part of the country. Over the weekend, slides killed three snowmobilers in Wyoming and Washington State.