Forecast discussion: If you want out and around Boston on Saturday, you would think it was an early day in the month of May. Our high temperature for the day was only 72 degrees, and that was by mid-morning. The temperature then fell to 63 degrees by 4 p.m. Unfortunately, the weather is not going to get much better for Sunday.
What’s causing this cool, wet weather? A low pressure system right off of Long Island is following a frontal boundary to our south. This is allowing moisture to continue staying over Southern New England. For this evening, we will see mostly drizzle, mist, and some areas may even see dense fog. As we get into the morning, sunshine will help create daytime heating, which will warm the atmosphere. This will help create a better risk for some showers and a highly isolated thunderstorm.
The frontal boundary will remain mostly stationary into Monday. So, there is a slight chance for some showers and thunderstorms, especially during the afternoon hours. By Monday night, a weak disturbance will help push the boundary out into the Atlantic. We will see the chance for a shower or thunderstorm on Tuesday, but I am only expecting partly sunny skies. A weak cold front passing through the region may create some showers by Wednesday afternoon. The risk will remain into early Thursday morning.
By Thursday afternoon, high pressure coming down from eastern Canada will finally bring drier air into New England. We will see mostly sunny skies going into next weekend. However, if you are looking for the lazy, hazy, crazy days of summer in August, you will be out of luck. We will remain with slightly below normal temperatures for early August for the next several days.
Meanwhile, Tropical Storm Bertha was centered at 18.9N 69.1W, or about 60 miles east-southeast of Santo Domingo in the Dominican Republic. Maximum sustained winds are only at 45 mph, and is moving west-northwest at 22 mph. Tropical Storm Watches and Warnings are in effect for the eastern Dominican Republic and the Bermuda Islands. By Sunday afternoon, Bertha will pass east of Bermuda, before turning to the north and north-northeast on Monday. Bertha is forecast to become a hurricane on Wednesday, but the system will be pushed out to sea by the frontal boundary currently staying south of Southern New England by the middle of next week.
72 hour forecast:
Tonight: Cloudy with isolated showers and patchy to dense fog with a low of 61.
Sunday: Isolated showers with the risk of a passing thunderstorm, especially in the late morning/early afternoon hours. I’m only expecting a high of 73 with east-northeast winds of 5-8 mph.
Fenway Park Forecast (8:10 p.m. vs. Yankees): Cloudy, isolated showers, 65.
Sunday night: Mostly cloudy with an isolated shower possible. Patchy fog is possible, especially neat the coastline. We will see a low of 63 with northwest winds of 3-6 mph.
Monday: Partly to mostly sunny with the risk for afternoon showers or thunderstorms. We will see a high of 77.
Monday night: Partly cloudy after midnight with a low of 65.
Tuesday: Partly sunny with the chance for some afternoon showers/thunderstorms. We will see a high of 81.
Tuesday night: Mostly cloudy with a low of 66.
Wednesday: Partly sunny with the chance for showers starting in the late morning. Highs 79-82, lows 63-66.
Thursday: Early morning showers become partly to mostly sunny skies. Highs 79-82, lows 61-64.
Friday: Mostly sunny. Highs 79-82, lows 63-66.
Saturday: Mostly sunny. Highs 79-82, lows 63-66.