Greater Boston, North Shore and Metro West: Last weekend we talked about the trend to colder temperatures this week and that has certainly been the case. However, temperatures have plummeted lower than originally thought with the morning lows down into the low and mid teens across the area this morning. Yesterdays high of 30 in Boston was only the second day this month that temperatures failed to reach a high of 32 degrees, the other day was on the 8th when it reached only 29. We all remember how cold last Winter was and December was no exception with the mercury running about 1.5 degrees below normal and failing to reach the freezing level on 7 days and reaching just 32 on two other days. Despite this month ending on a cold note the month of December 2014 will go into the books with temperatures well above average. Through yesterday the mercury was averaging near 3.8 degrees above normal.
Today will stay cold with high temperatures only climbing to near 30 degrees at best despite a good amount of sunshine. Winds remain light through the morning and stay generally under 15 mph this afternoon from the southwest.
If you are going out tonight and especially if you are staying out for first night festivities you need to bundle up as temperatures fall back through the 20s. Although temperatures should not be as cold as last night, lows will generally bottom out in the mid teens to 20 degrees, winds are going to be brisk through the evening making for wind chill values in the teens to near 10 degrees. Skies remain fair.
We do remain on the edge of a large ridge of high pressure for New Years Day and Friday before low pressure crossing into the Great Lakes brings the area unsettled weather over the second half of the weekend. A coastal low is also expected to develop, although not a strong system, but this will complicate the forecast at the onset of the precipitation later Saturday night before the milder air takes over on Sunday.
Generally fair skies and cold New Years Day and Friday with high temperatures in the low to mid 30s and overnight lows in the low 20s. Winds stay brisk on New Years Day and evening keeping those wind chills about 10 degrees below the actual air temperature.
Moving into this weekend Saturday likely starts out with partial sunshine but clouds increase through the day. Close to normal highs of near 35 degrees. The normal high is about 37 for the beginning of January. But, Saturday night is when things start to get complicated. With cold air in place and the possibility of a coastal low developing we could see several hours of snow inland and a mix along the coast before the change to rain on Sunday. With this event still several days out the computer models have time to come into agreement on the most likely scenario, which in turn will bring about a more detailed forecast.
Until next time I wish you all a very Happy New Year.