Waves of arctic air are expected to arrive in South Orange by the middle of next week, according to Accuweather meteorologist Justin Roberti, following pleasant weather this week.

And when it arrives, the cold spell could stay for a while. Roberti writes, "There is some indication that steering-level winds, known as the jet stream, could dip southward over the region for an extended period aside from a few wobbles."

Current forecasts show temperatures in the 20s for late next week, but this could change. According to Chief Meteorologist Elliot Abrams, "Farther north and east (from the northern Plains to the central Great Lakes, New England and the mid-Atlantic), it is possible that the waves of arctic air may have more staying power, perhaps lasting a week or more instead of a few days at time."

Sunshine and warm weather notwithstanding, residents may want to prepare for the coming cold.