Here's what we know so far about this developing situation.

Another quick-hitting system will bring more snow to the mid-Atlantic, falling in the same areas that saw snow on Friday. Snow will impact travel along the I-95 corridor Monday afternoon into the evening. The highest snow totals will likely be across western Virginia and West Virginia. Click on this video to see an hour-by-hour forecast.

A clipper system will slide across the Great Lakes to the Northeast midweek, bringing another shot of snow for the region. Widespread snow totals of 3-5 inches are expected with some locations possibly seeing up to a foot. And that’s not all — the system will also usher in another blast of cold, arctic air. Check out the timing here.

Another atmospheric river is set to slam into the Pacific Northwest. While some of these can be beneficial, this one may be largely hazardous for flooding rain. Here's the latest forecast.

A resident of Morris, Minnesota, captured not one, but two stunning phenomena high in the sky over her state. Freezing temperatures and a bright, sunny day combined to create sparkling, colorful halos, one that flanked the sun and one that hovered upside down above it.