A bitter blast of cold air settles over the D.C. region Tuesday as all eyes turn to a potential weekend winter storm that could deliver significant snowfall.

There are many variables that go into forecasting snow amounts, that apps don't account for.

It's time to bring out all the layers, because some bitter cold is on the way for the DC area this week.

If you’ve noticed snow forecasts changing ahead of this weekend’s winter storm, you’re not alone, but it doesn’t mean forecasters are guessing. It means the atmosphere is still sorting out key details.

WASHINGTON (DC News Now) — It’s the talk of the town, well, the DMV. We’re expecting snow in D.C., Maryland, and Virginia, without knowing just how much. Until that becomes clearer, here’s an overview of how things are looking.

All eyes are on a storm system that could bring the chance for accumulating snow to the area over the Martin Luther King Jr. holiday weekend.

SATURDAY NIGHT: Overcast, Scattered Showers Lows: 42-48 Wind Chill: 30s Winds: Northwest 5-15 mph A cold front moves through which will lower rain chances before tomorrow morning and winds will begin to increase out of the northwest.

Snow could be headed for the DMV for the last weekend in January.