Forecast discussion: We are still feeling the effects of that low pressure system that brought the large rainfall and strong winds from the east. Logan Airport in Boston officially received 1.63 inches of rain on Sunday, and exposed beaches along the south shore and the Cape and Islands are still dealing with very strong rip tides. Surf heights are still 4-6 feet at the moment, and the Rip Current Statement will continue until 8 p.m. Monday night. With lighter winds, the surf will continue to decrease this evening.
Meanwhile, the frontal boundary to our south continues to keep cloud cover over Boston into Monday afternoon. As we move into this evening, high pressure ridging from the north will slowly dissipate the cloud cover, allowing for mostly sunny conditions for Tuesday. We will begin to see some cloud cover return Tuesday evening, as we await a new cold front to pass through Southern New England. There may be enough upper level dynamics on Wednesday to create some strong or severe thunderstorms. Any thunderstorms will taper off by 7 p.m., as we begin to lose the daytime heating due to sunshine.
The cold front will remain to our south on Thursday, allowing for some sunshine in the morning, but that sunshine may help create more afternoon thunderstorms. The front will slowly move offshore Thursday evening, allowing for mostly sunny skies for Friday. The high pressure ridge at the moment is pretty weak. The computer models are very unsure if the high pressure ridging will be strong enough to keep us with sunshine for Independence Day. There is the chance we will see mostly cloudy skies, with a possible shower by the time firework displays are to begin across eastern Massachusetts. Right now, my confidence in the forecast is low.
We enter early next week with high pressure once again taking firm control of the weather, giving us mostly sunny skies for Sunday. The high will protect us into the end of the forecast period. Since the jet stream remains pretty straight over the region, temperatures will remain pretty uniform. Highs temperatures stay in the middle to upper 70’s, with lows in the lower to middle 60’s.
72 hour forecast:
Tonight: Clear skies with a low of 61.
Tuesday: Mostly sunny through mid-morning, with increasing clouds by the late afternoon. We will see a high of 79 with winds shifting to the southeast at 9-12 mph by 2 p.m.
Tuesday night: Mostly cloudy with showers possible after 4 a.m. We will see a low of 64. Winds will come from the south-southeast at 6-9 mph.
Wednesday: Cloudy with showers and possible strong thunderstorms. We will see a high of 78.
Wednesday night: Showers end by midnight with clearing skies. We will see a low of 65.
Thursday: Mostly sunny in the morning with possible showers by the mid-afternoon. We will see a high of 78.
Thursday night: Showers/thunderstorms end by 3 a.m. with a low of 63.
Friday: Mostly sunny. Highs 76-79, lows 61-64.
Independence Day: Mostly cloudy by the afternoon, with a possible shower by the evening. Highs 76-79, lows 63-66.
Sunday: Partly sunny. Highs 77-80, lows 62-65.
Monday: Partly to mostly sunny. Highs 77-80, lows 62-65.