DAYS 1-5 (JULY 7-11)
The holiday weekend is over (unless you extended it) and we move into the heart of summer now. And today will certainly feel like it with heat and high humidity thanks to high pressure offshore. The increase in moisture, combined with solar heating, can lead to a few pop up showers and/or thunderstorms this afternoon, although most places will not see anything. Any of that activity dissipates this evening, but the clouds will increase overnight with both the approach of the remains of T.S. Chantal from the Southwest and a cold front from the northwest. The former will bring a batch of showers from pre-dawn to mid morning Tuesday, but heaviest and most concentrated activity is likely to occur over Cape Cod and the Islands. The latter will increase the shower and thunderstorm chances from northwest to southeast from midday through afternoon. With some sunshine, it will still be able to heat up and also it will be quite humid. Showers/storms will simmer down and diminish Tuesday night as the front pushes through, then settles to a stop near or off the South Coast Wednesday into late week. A little press of high pressure from the north will keep us mainly dry Wednesday with just a possible shower to the south and west of Boston. A wave of low pressure moving eastward along the front to our south will increase shower chances later Thursday into Friday. Wednesday through Friday will also be noticeably cooler than early week.
TODAY: Partly sunny. Isolated afternoon showers and thunderstorms. Highs 86-93 except 78-85 South Coast. Dew point 70+. Wind SW 5-15 MPH gusts 20-25 MPH.
TONIGHT: Variably cloudy. Any early isolated showers dissipate. Shower/thunderstorm chances increase especially east of I-95 overnight. Lows 71-78. Dew point near 70. Wind SW 5-15 MPH becoming variable up to 10 MPH.
TUESDAY: Variably cloudy. Showers and thunderstorms likely, favoring eastern CT, RI, and southeastern MA early, then redeveloping from northwest to southeast midday through afternoon. Highs 82-89 except 75-82 South Coast. Dew point 70+. Wind variable to SW 5-15 MPH.
TUESDAY NIGHT: Variably cloudy. Patchy fog. A shower or thunderstorm possible early. Lows 66-73. Dew point middle to upper 60s. Wind variable to N up to 10 MPH.
WEDNESDAY: Lots of clouds / partial sun. A shower possible south and west of Boston. Highs 75-82, coolest coast. Dew point 60+. Wind N to E up to 10 MPH.
WEDNESDAY NIGHT: Partly cloudy. Patchy fog. Lows 61-68. Dew point 60+. Wind E up to 10 MPH.
THURSDAY: Mostly cloudy. Showers likely, mainly in the afternoon. Chance of a thunderstorm. Highs 71-78. Dew point in 60s. Wind E 5-15 MPH.
THURSDAY NIGHT: Mostly cloudy. Showers likely. Patchy fog. Lows 61-68. Dew point 60+. Wind E up to 10 MPH.
FRIDAY: Mostly cloudy. Showers likely, mainly morning and midday. Chance of a thunderstorm. Highs 71-78. Dew point in 60s. Wind E 5-15 MPH.
DAYS 6-10 (JULY 12-16)
The July 12-13 weekend will be governed by weak high pressure and mainly dry, though a spot shower or t-storm can’t be ruled out July 12 as an upper disturbance passes by. A modest warm-up but no high heat is expected. Disturbance brings increased shower / thunderstorm chances early next week with a drying trend by midweek.
DAYS 11-15 (JULY 17-21)
Through mid period, moderate humidity and temperatures, mainly fair weather with high pressure to the north dominant, keeping low pressure to the south far enough away to limit shower chances. Later in the period some indications of high pressure building aloft with hotter weather again.