Forecast discussion: After a powerful Nor’Easter brought blizzard conditions to the Cape and Islands, and strong winds through Boston, Thursday’s weather was much calmer. High pressure in the Atlantic helped bring sunshine and a few fair weather clouds over the capital city today. However, southwest winds kept temperatures cooler than normal for this time of the year.
Going into early Friday morning, we will begin to see increasing clouds in the skies. This is moisture coming from a low pressure system over Arkansas. The low will begin to slowly progress east, and producing some showers by Friday afternoon. The cold front will pass through Southern New England late Friday night, with showers ending by early Saturday morning.
However, we will see more precipitation through the weekend. A second low pressure system will form over Tennessee, with a warm front extending into Southern New England. This frontal boundary will bring showers at first by Saturday afternoon, but the computer models agree that we will see heavier rainfall within three to five hours. So, heavy rain is expected Saturday night into the middle of Sunday afternoon. We may see between 2 to 3 inches of rain in total, with isolated areas seeing up to 4 inches of rain before the low moves out to sea Monday morning. Also, temperatures may be cold enough Sunday evening that a little sleet mixes in with the rain.
By Monday afternoon, we will have partly sunny conditions. We will keep some sunshine and seasonable temperatures during the daytime hours. A weak low pressure system will pass through Northern New England, giving us the chance of an isolated shower Wednesday afternoon. A new warm front will pass south of New England on Thursday, helping to produce some scattered showers by Thursday morning. Temperatures will remain quite consistent for highs and lows Tuesday through Thursday.
72 hour forecast:
Tonight: Partly to mostly cloudy skies expected and not as cold with a low of 34.
Friday: Mostly cloudy and windy with showers arriving by 3 p.m. We will see a high of 54 with south-southwest winds of 17-22 mph with occasional gusts of 30 mph.
Friday night: Showers ending by 3 a.m. but remaining cloudy with a low of 44. Winds will diminish to 8-12 mph and come from the west-southwest.
Saturday: Cloudy with showers arriving by 3 p.m. Showers turn to moderate rain by 5 p.m. We will see a high of 52.
Saturday night: Moderate to heavy rain with a low of 37.
Sunday: Moderate to heavy rain tapering to showers by the early evening. We will see a high of 41.
Sunday night: Showers may mix with some sleet at times. We will see a low of 33.
Monday: Showers/sleet end by mid-morning, and becoming partly sunny by the afternoon. Highs 44-47, lows 33-36.
Tuesday: Partly to mostly sunny. Highs 47-50, lows 35-38.
Wednesday: Partly sunny with a possible afternoon shower. Highs 48-51, lows 34-37.
Thursday: Cloudy with scattered showers by mid-morning. Highs 47-50, lows 34-37.