We are tracking multiple systems to impact the Northeast and Great Lakes through the weekend. Round 1 will be an arctic front that will blast across the region Wednesday into Thursday. Precipitation will start as rain early Wednesday and then change over to snow Wednesday night into Thursday. Widespread accumulations look likely, with the highest totals expected across the lake-effect snow belts and the higher elevations across New England. Watch this video to see how much snow could fall.

An arctic front is set to bring the coldest air of the season to parts of the Southeast. Scattered showers and storms will be possible Wednesday into Thursday as the front moves in from the northwest. Rain will change over to snow across the higher elevations of the Appalachians in western North Carolina and western Virginia. Watch this video to see how low temperatures go.

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.

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.

During the Apollo missions, NASA put reflectors on the moon. In the five decades since then, scientists have shot laser beams at the reflectors to figure out how long it takes light to come back to Earth. That led to a huge revelation: The Earth and moon are drifting apart. Watch this video to learn how fast that’s happening and what it means for our planet.