How about a little mystery to add to your wintertime drama?

For most of the week, weather forecasters have been talking about a coming storm in doubtful tones. It would likely be just a dusting; maybe just a smidge more than that.

By Thursday, doubt was vanishing fast.

“Increasing confidence for a potential major snowstorm for all of New Hampshire and southern and western Maine Saturday night through Sunday,” The National Weather Service declared at about 3 p.m.

In short: Here we go again.

Predictions call for another foot of snow — and possibly up to 20 inches — in most areas. To add to that fun, temperatures are expected to drop to below zero on Friday, with frigid conditions expected to linger into next week.

But wait, there’s more. Predictions also call for drifting snow and high winds that will likely cause blizzard conditions. A storm watch was in effect for most parts of southern and central Maine starting Saturday night.

It’s forecast to get underway in the early evening on Saturday. By Sunday morning, after a full night of snowing and blowing, snow and winds are expected to grow heavier, creating white-out conditions.

The Weather Service in Gray has declared the recent pummeling as the third-snowiest two-week period since 1979, with slightly more than 48 inches falling on most parts of the region after a string of storms battered the area starting in late January.

In 1979, 49.8 inches fell over a two-week span beginning Jan. 13. In 1970, the region saw 49.9 inches during the two weeks leading to Christmas.