7:33AM
DAYS 1-5 (SEPTEMBER 4-8)
The heat and humidity in this latest bout peaked on Monday as you will notice today being a little less hot and also may notice a downward trend in the humidity, but it will be subtle as a fairly inactive back door cold front slips across the region from northeast to southwest. These fronts carry much less impact at this time of year than they do in the spring, but it will be enough to take the edge off the heat/humidity into Wednesday. Any shower activity with this front will be isolated and mainly well west and southwest of Boston this afternoon, otherwise expect no threat of rain through Wednesday, even as the boundary starts a northeastward return. By Wednesday night into Thursday we’re back in the heat and humidity for a short time. A stronger cold front will move through late in the day and evening from northwest to southeast, bringing a greater threat of showers and thunderstorms, then introducing a cooler/drier air mass to the region during Friday and into the weekend. Friday may be somewhat slow to clear as the front will be slowing down as it exits the South Coast, so that day may end up more cloud-dominated than Saturday will likely turn out. Forecast details…
TODAY: Partly cloudy. Slight chance of an isolated shower or thunderstorm mainly mid to late afternoon west and southwest of Boston. Slightly less humid. Highs 77-82 Cape Cod, 83-88 eastern MA and NH Seacoast, 88-93 elsewhere. Wind light variable becoming light NE.
TONIGHT: Partly cloudy. Less humid. Lows 60-67. Wind light NE to E.
WEDNESDAY: Mostly sunny. Moderately humid. Highs 78-86. Wind E up to 10 MPH shifting to S.
WEDNESDAY NIGHT: Partly cloudy. More humid. Lows 66-72. Wind S to SW up to 10 MPH.
THURSDAY: Partly sunny. Scattered afternoon and evening showers/thunderstorms. Humid. Highs 80-86 South Coast, 87-93 elsewhere. Wind SW 10-20 MPH.
FRIDAY: Mostly cloudy. Chance of showers, favoring the South Coast in the morning. Less humid. Lows in the 60s. Highs in the 70s.
SATURDAY: Partly cloudy. Comfortable. Lows from the upper 50s to lower 60s. Highs from the upper 60s to middle 70s.
DAYS 6-10 (SEPTEMBER 9-13)
A rather cool day Sunday September 9 and clouds are expected to increase. It may turn wet before day’s end from the combination of a low pressure area passing through the Great Lakes and moisture that was associated with Gulf of Mexico tropical system Gordon. As that area passes to the north a trailing front will bring additional unsettled weather September 10 before a brief drier/cooler shot September 11 and a quick warm-up following it later next week with mainly dry weather. Odds favor TS or Hurricane Florence making a turn near or east of Bermuda around the middle to end of next week and not impacting the East Coast but will continue to monitor that storm.
DAYS 11-15 (SEPTEMBER 14-18)
High pressure ridging will overtake the weather again with mainly dry weather and above normal temperatures expected. However with this pattern in place and tropical systems potentially off the coast, always something to keep a close eye on.