Author's note: This Friday, I will be away from my computer. So, there will be no update Friday night for Saturday's forecast. However, I will return on Saturday to provide you with the forecast for the rest of the Memorial Day weekend. I apologize for any inconvenience.
Forecast discussion: After several days of bright sunshine in the morning, Boston finally saw grey skies when they began the day. Unfortunately, the next few days are going to look like a broken record. The grey skies and showers are coming from a low pressure system centered over eastern New York. This low will remain stationary, and will continue to provide eastern Massachusetts with some precipitation. Also, there is the chance of some patchy fog during the overnight hours.
As we head into Friday, we will remain quite cool for this time of the year. A warm front associated with this low will remain to our south and west. So, the front will help bring isolated showers, especially during the afternoon hours. By Friday night, the warm front will begin to move over Southern New England. We will see scattered showers and the possibility of a thunderstorm. As we head into Saturday, a low pressure system coming into eastern Canada will bring a weak disturbance into New England. This disturbance will help create some isolated showers during the morning, but the activity will become more isolated as we head into the evening. Temperatures will also begin to increase, as winds shift from the east to the south and southwest.
By Sunday, we should see some signs of sunshine through the clouds. However, any sunshine may help form some isolated showers or a thunderstorm in the afternoon. However, I would not cancel any outdoor plans, because any precipitation will not last very long. It appears the best day of the weekend will be Memorial Day. High pressure will be far enough east to give us blue skies and seasonable temperatures for Monday. Some areas may reach 80 degrees in the more inland areas.
After the holiday weekend, we will return to work or school with cloudy skies and more showers and light rain Tuesday morning. This will be due to a quick moving cold front. The precipitation will end by midnight, as the cold front moves offshore.
A weak high pressure ridge will bring a mix of sun and clouds on Wednesday, but a quick moving disturbance may help produce a shower or two early Thursday morning. But, the disturbance will move offshore by the end of the morning commute. We will return to mostly sunny skies by next Thursday afternoon. High temperatures will return to the lower to middle 70’s.
72 hour forecast:
Tonight: Overcast with isolated showers, drizzle, and patchy fog. We will see a low of 53.
Friday: Isolated showers through the day with a high of 58. Winds will come from the east-northeast at 7-10 mph.
Friday night: Showers with isolated thunderstorms and some patchy fog. We will see a low of 50 with north-northeast winds of 7-10 mph.
Saturday: Mostly cloudy with showers becoming more isolated through the day. We will see a high of 63.
Saturday night: Drizzle and mist will linger with a low of 52.
Sunday: Partly sunny skies in the morning, with the chance for afternoon showers and an isolated thunderstorm. We will see the high near 70.
Sunday night: Partly cloudy with a low of 56.
Memorial Day: Mostly sunny and warmer. Increasing clouds expected during the evening. Highs 76-79, lows 57-60.
Tuesday: Cloudy skies after midnight, with showers/light rain developing by 9 a.m. Showers end by 11 p.m. Highs 73-76, lows 56-59.
Wednesday: Partly sunny skies. Highs 70-73, lows 53-56.
Thursday: A passing shower during the early morning; otherwise, mostly sunny skies by the afternoon. Highs 73-76, lows 54-57.