DAYS 1-5 (AUGUST 27-31)
High pressure aloft will dominate the last several days of August, but some changes will be brought about by what goes on at the surface. It starts with 3 hot days through Wednesday with a westerly air flow, the hottest days being Tuesday and Wednesday, then a transition day Thursday as a cold front crosses the region, a little slower timing than was previously expected, so must add some showers and possible thunderstorms to the forecast as the front will have a little more chance to work with daytime heating. Still looking for a more northeasterly flow by Friday and cooler weather. Frontal boundary should be just far enough to the south for dry weather at that time. Forecast details…
TODAY: Hazy sun. More humid. Highs 84-93. Wind W 5-15 MPH.
TONIGHT: Partly cloudy. Humid. Lows 66-73. Wind SW 5-15 MPH.
TUESDAY: Hazy sun. Humid. Highs 90-97 except 80s parts of South Coast and Cape Cod. Wind SW 5-15 MPH, higher gusts.
TUESDAY NIGHT: Clear and hazy. Muggy. Lows 68-76. Wind light SW.
WEDNESDAY: Hazy sun. Humid. Highs 90-97 except 80s parts of South Coast and Cape Cod. Wind SW 5-15 MPH.
THURSDAY: Variably cloudy. Isolated to scattered showers southern NH and northern to central MA late morning through early afternoon. Scattered showers and possible thunderstorms southeastern MA, eastern CT, and RI, afternoon to early evening. Humid. Lows from the upper 60s to middle 70s. Highs in the 80s.
FRIDAY: Partly sunny. Less humid. Lows in the 60s. Highs in the 70s.
DAYS 6-10 (SEPTEMBER 1-5)
In a pattern we’ve seen a few times late this summer, Labor Day Weekend will feature surface high pressure sinking southward to the east of New England and a gradual shift of air flow from easterly to southerly as an old frontal boundary lifts back northward across the region. By Labor Day September 3 a weak front from the west will approach. There may be a few showers during the September 1-2 transition and a few showers/storms around September 3 as the front from the west moves in. September 4-5 look mild to warm with mainly dry weather.
DAYS 11-15 (SEPTEMBER 6-10)
A shot of building heat early through mid period as high pressure aloft strengthens over the region, then a shower/thunderstorm threat with a surface boundary in the region later in the period.