7:08AM
DAYS 1-5 (JULY 17-21)
The big focus today is the thunderstorm threat as a cold front and accompanying vigorous disturbance pushes into a warm/humid air mass. We’ll watch for a couple to several lines and/or clusters of showers and thunderstorms. Any of the storms have the potential to become severe, with the greatest potential for this being north and west of Boston during this afternoon. Drier air arrives during midweek, and humidity then tries to make a comeback later in the week, as first high pressure brings a bit of air from Canada, and then moves offshore and grabs air from over the ocean and south of the region. Forecast details…
TODAY: Partly to mostly cloudy. Areas of fog early. Showers and thunderstorms likely from early afternoon on from west to east. Humid. Highs 76-83 coast, 83-89 interior. Wind SW 5-15 MPH but may be variable and gusty near any storms.
TONIGHT: Mostly cloudy. Showers and thunderstorms likely eastern and southern areas evening. Areas of fog. Humid. Lows 62-69. Wind light variable but may be gusty near any storms early, then N up to 10 MPH overnight.
WEDNESDAY: Mostly cloudy morning with possible showers, especially Cape Cod, then clearing. Less humid. Highs 75-82. Wind N 5-15 MPH.
WEDNESDAY NIGHT: Mostly clear. Lows 55-63. Wind light N.
THURSDAY: Mostly sunny. Highs 78-85. Wind light variable with coastal sea breezes.
FRIDAY: Mostly sunny. Lows in the 60s. Highs in the 80s but cooler some coastal areas.
SATURDAY: Partly cloudy. Lows in the 60s. Highs from the upper 70s to upper 80s, coolest coastal areas.
DAYS 6-10 (JULY 22-26)
Increased shower risk and more humidity July 22-23 with more southerly air flow as high pressure is offshore but fairly far north. During the remainder of the period, a pattern transition to ridge West, trough Midwest / Great Lakes, ridge off East Coast will be underway with higher humidity common, warm to at times hot, but almost daily opportunities for at least isolated showers and thunderstorms.
DAYS 11-15 (JULY 27-31)
The pattern that develops during the days before this likely continues during this period.