This week's nor'easter is expected to be spread across three days, having started on Monday and continuing through Wednesday morning.
It's also expected to bring a wide range of potentially devastating impacts, including over 20 inches of snowfall, high winds that could cause widespread power outages, coastal flooding and potentially even blizzard conditions in some areas.
Here's a detailed look at the timing and potential impacts of this week's big winter storm:
When is it going to snow, and how long will the winter storm last?
Get Boston local news, weather forecasts, lifestyle and entertainment stories to your inbox. Sign up for NBC Boston’s newsletters.