DAYS 1-5 (AUGUST 22-26)
This is the one unsettled day of the week and it’s caused by a warm front / cold front combination moving across the region, first the warm front which is currently doing so from southwest to northeast with a fairly widespread area of rain and embedded downpours. Have to watch this area for a relatively short time until late morning in case a stronger thunderstorm as able to get going within it, as this would have the potential for damaging wind. It is a long shot chance. A wedge of very humid air will briefly visit between the 2 fronts, and the cold front will charge eastward across there region bringing a broken to scattered line of showers and thunderstorms. With this line there is a low probability of damaging wind gusts, but again any of that would be isolated. This line will cross Cape Cod later in the day. By evening, it’s gone and in comes a refreshing air mass from Canada. Removing the shower risk for Thursday’s forecast, just some fair weather clouds decorating the sky in an otherwise very nice late summer day. High pressure settles across the region Friday through Sunday which will feature great summer weather but a gradual warming trend and a slight increase in humidity daily. Forecast details…
TODAY: Mainly cloudy through late morning with numerous showers and possible embedded thunderstorms. Partly sunny midday and afternoon with a possible passing shower or thunderstorm west to east, earliest in central MA and eastern CT, then across southern NH, eastern MA, and RI, and lastly Cape Cod. Becoming very humid especially late morning through mid afternoon. Highs 76-84. Wind SE shifting to SW 5-15 MPH then shifting to W later in the day from west to east with higher gusts possible.
TONIGHT: Mostly clear. Drying out. Lows 58-65. Wind NW 5-15 MPH.
THURSDAY: Partly cloudy. Highs 75-82. Wind NW 5-15 MPH.
THURSDAY NIGHT: Mostly clear. Lows 48-53 interior valleys, 54-60 elsewhere. Wind light NW to N.
FRIDAY: Sunny. Highs 76-84, coolest coast. Wind light variable with sea breezes.
SATURDAY: Mostly sunny. Lows from around 50 interior valleys to around 60 urban areas. Highs from the upper 70s to middle 80s, coolest coast.
SUNDAY: Mostly sunny. Slightly more humid. Lows from the upper 50s to middle 60s. Highs in the 80s, some 70s Cape Cod and immediate shores.
DAYS 6-10 (AUGUST 27-31)
High pressure aloft will be in control with more heat during much of this period, including some higher humidity as well. A couple disturbances passing north of the region will be close enough to trigger shower and thunderstorm chances from time to time. At this time of year we also have to keep an eye on sea breeze boundaries for possible storm development focus regions too.
DAYS 11-15 (SEPTEMBER 1-5)
General pattern remains the same but will have to watch for a quick cooler interlude of high pressure moving across Canada noses southward far enough. That may also mean we’ll be close to a surface boundary and may experience a higher risk of some shower and thunderstorm activity at times.