Forecast discussion: Boston has been seeing showers during the day, with periods of rain during the afternoon and evening commute. Logan Airport has received a half an inch of rain as of 7 p.m. The low pressure system that has created this rain is now moving offshore and passing over Cape Cod. The rainfall will end around 11 p.m., with some partial clearing during the overnight.
By tomorrow, a weak high pressure ridge will bring sunshine and mild temperatures. However, the ridge will break down, allowing for some extra clouds to move in tomorrow night. At this time, the computer models disagree on how to handle a low developing offshore. The American model keeps it offshore just enough for us to see dry weather. There is the chance of seeing a passing snow shower, but not enough to even create a coating of snowfall.
The models come to an agreement on Thursday, with the offshore low passing off to the northeast and Nova Scotia. The Cape and Islands may see some scattered showers during the overnight. We will see more clouds than sun entering Friday, but a quick moving low may bring a mix of rain and snow showers by Friday evening. The precipitation will eventually turn to rain showers on Saturday, before ending by the evening. As we go through the weekend, there is the chance of some snow showers by Sunday night, as a low pressure system develops over eastern Pennsylvania. However, the precipitation ends by early Monday morning. The holiday looks nice, with sunshine, but temperatures will be slightly below normal. There is the chance of more snow showers on Tuesday, as a low pressure system moves over New England.
72 hour forecast:
Tonight: Rain/showers end around 11 p.m., with mostly cloudy skies. Patchy fog may develop after 2 a.m. We will see a low of 36.
Wednesday: Mostly sunny and a high of 50 with temperatures dropping through the mid-afternoon. Winds will come from the south-southwest at 6-9 mph.
Wednesday night: Mostly cloudy with a passing snow shower and a low of 34. Winds will turn to the northwest at 4-7 mph.
Thursday: Partly to mostly sunny with a high of 43.
Thursday night: Mostly cloudy with possible showers and a low of 32.
Friday: Partly sunny with a high of 46.
Friday night: Mostly cloudy with scattered snow/rain showers a low of 33.
Saturday: Snow/rain showers through the daytime, with mostly cloudy skies by the evening. Highs 37-40, lows 22-25.
Sunday: Mostly cloudy with snow showers possible by the early evening. Highs 32-35, lows 18-21.
Martin Luther King Jr. Day: Snow showers end by 2 a.m. with mostly sunny skies. Highs 32-35, lows 22-25.
Tuesday: Mostly cloudy with possible snow showers. Highs 36-39, lows 24-27.