DAYS 1-5 (OCTOBER 20-24)
The high pressure north, storm at sea pattern continues for a few more days. The initial expected push of the offshore low north enough to throw a cloud shield across the sky later yesterday was weaker than forecast, and the cloud deck’s progress was weak and thwarted further by dry air. As a result, a mostly clear night resulted in a colder start this morning and also means more sunshine will be around today. Even tonight into Wednesday the cloud deck will struggle to push north and west initially, but will finally do so in a more notable way later Wednesday through early Thursday, when the storm makes its closest pass to New England, clouds enough to bring the chance of some light rainfall to Nantucket, Martha’s Vineyard, and Cape Cod, and perhaps a few sprinkles as far north and west as the MA South Shore to South Coast (west of the Cape Cod Canal). By later Thursday, the storm actively moves north northeast and its cloud deck departs. As the storm heads for Atlantic Canada late this week, an upper low’s western periphery will skirt our region on Friday with a cloud / sun mix but it looks like any convective precipitation associated with it will be up over Maine then track into the waters east of our region. Saturday’s weather should feature full sunshine as high pressure builds in for a nice start to the final full weekend of October.
TODAY: Limited sun Cape Cod / Islands, brighter sun filtered by high clouds at times elsewhere. Highs 56-63. Wind NE 5-15 MPH except 15-25 MPH Cape / Islands.
TONIGHT: Partly cloudy – most clouds Cape / Islands. Lows 38-45. Wind NE 5-15 MPH, except higher gusts Cape / Islands.
WEDNESDAY: Slow increase in high to middle clouds southeast to northwest, further limiting sunshine. Highs 55-62. Wind NE 5-15 MPH except 15-25 MPH Cape / Islands.
WEDNESDAY NIGHT: Mostly cloudy. Periods of rain possible Cape / Islands and slight chance of rain MA South Shore to South Coast west of Cape Cod Canal. Lows 41-48. Wind NE 5-15 MPH except 15-25 MPH MA South Shore to South Coast including Cape / Islands.
THURSDAY: Increasing sun west to east. Highs 53-60. Wind NE to N 10-20 MPH.
THURSDAY NIGHT: Mostly clear. Lows 33-40. Wind N 5-15 MPH, higher gusts.
FRIDAY: Partly sunny. Highs 51-58. Wind N 10-20 MPH, higher gusts.
FRIDAY NIGHT: Mostly clear. Lows 31-38. Wind N to NW diminishing to under 10 MPH.
SATURDAY: Sunny. Highs 52-59. Wind NW up to 10 MPH.
DAYS 6-10 (OCTOBER 25-29)
High pressure provides fair weather with a milder trend as it sinks to the south of the region early period. Watch for a cold frontal passage with maybe a rain shower sometime October 27-28 and a shot of cooler air to follow it in a generally zonal flow pattern.
DAYS 11-15 (OCTOBER 30 – NOVEMBER 3)
A little uncertain as to the pattern details end of October and start of November but for our sensible weather is currently looks dry to end the month, and maybe a brief interruption of unsettled weather somewhere in the first couple days of November as the westerly flow pattern is most dominant here. Temperatures would be up-and-down, but not extreme in either direction.