The coastal system that has been sitting off the coast of Cape Cod will continue to do so today before very slowly beginning to move out to sea away from New England. This will cycle a lot of clouds and scattered showers into eastern areas for one more day. The overall weather for Saturday will be very similar to Friday, though showers will likely continue to push farther west than the previous days.
GFS showing potential weather early this afternoon:
An additional tenth of an inch to half an inch will be possible across eastern Massachusetts and Rhode Island today, with the most focused across Cape Cod. Other impacts from this system will be the continued risk for minor coastal flooding across much of the New England coastline. High surf combined with tides near monthly astronomical highs will lead to splash over and ponding near the coast, similar to what occurred yesterday. This will be possible for both the Saturday and Sunday afternoon high tides.
Heading into Sunday, a drying trend will commence for eastern New England as the system continues its very slow departure. The day will remain mainly cloudy, however. The cooler temperatures will also be sticking around as an onshore flow continues. Far western New England will be a notch warmer away from the influence of the chillier ocean air, although they too will be cooler than previous days as high pressure from Canada builds back into New England.
Sunday also marks the first day of astronomical fall. The new season officially begins at 8:44am. It will certainly feel like fall on Sunday with cool temperatures, a cool breeze and mainly cloudy skies.
A very persistent easterly flow combined with Canadian high pressure will keep much of New England cool and cloudier than not through the middle of next week. Widespread 60s will rule high temperatures for most of New England. Again, far western New England will be the warmest during this time frame, though only slightly. The cloudier than not weather should keep overnight lows from bottoming out for most.
After a bout with high pressure early in the week, New England's next chance for rain will come around mid to late next week as a frontal system approaches. The overall synoptic setup for this time frame remains rather uncertain as a large-scale block over eastern Canada may begin to break down during this time. There will also be a southern stream system over the south and the potential for tropical development in the Gulf of Mexico.
Depending on how all of this plays out, the frontal system may sweep through New England in a progressive manner or it could cut off, leading to a more prolonged bout of unsettled weather. Either way, a period of unsettled weather and precipitation will be likely at some point near the middle of next week. How long this unsettled weather will remain to be seen.
Current weather map for Thursday (September 26). How all of this ends up setting up will determine how the weather for New England plays out:
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