The winter solstice takes place at 4:20am Saturday, marking the official start of astronomical winter. Mother Nature is going to be sure you know that winter has arrived this weekend.

An Alberta Clipper moves across the Great Lakes tonight, sending clouds back into the region. That system will head toward the Mid-Atlantic states and then offshore, becoming a rather potent system as it passes south and east of the region later Friday into Saturday. It may be just close enough to bring some rain or snow showers to Cape Cod, but with the counter-clockwise flow around the system, northeast winds blowing over the still relatively mild Atlantic will bring some ocean-effect snow showers to parts of our area later Friday into Friday night. This won’t be a big deal, but it may slow-down the Friday evening commute a little. Right now, it looks like most places will see less than 2 inches of snow from this system. Rain will eventually change to snow across Cape Cod, with 1-2 inches possible there as well.

The storm pulls away on Saturday and high pressure builds in, with northerly winds ushering in some of the coldest air so far this season from later Saturday into Monday. While most of the region will be sunny and cold Sunday, the northerly winds will bring clouds back into the Outer Cape, with some additional snow showers likely that could produce additional accumulations. Monday looks dry and cold, with clouds starting to move back in late in the day ahead of the next storm system.

Thursday night: Becoming mostly cloudy. Low 24-31, little milder across Cape Cod.
Friday: Cloudy and becoming breezy with snow showers developing, except rain showers across southeastern Massachusetts and Cape Cod, changing to snow showers late in the day. High 32-39, a little milder across southeastern Massachusetts and Cape Cod.
Friday night: Mostly cloudy with scattered snow showers, breezy along the coast. Low 21-28, little milder across Cape Cod.
Saturday: More clouds than sunshine, snow showers continue across Cape Cod, but end early elsewhere, breezy. High 28-35.
Saturday night: Becoming clear and cold, except across the Outer Cape where it will remain cloudy with some additional snow showers. Low 9-16, a little milder across the Outer Cape.
Sunday: Partly to mostly cloudy with snow showers across the Outer Cape, mostly sunny, breezy, and cold elsewhere. High 19-26.
Sunday night: Plenty of clouds with a few more snow showers across the Outer Cape, clear elsewhere. Low 6-13, a little milder across the Outer Cape.
Monday: Partly to mostly sunny, clouds start to move in late in the day. High 24-31.