Following a fabulous Friday bonus with temperatures reaching the lower 70s away from the ocean, we end up with a Saturday setback as stronger high pressure pushes southwestward from eastern Canada and northern ME. It is sending a stream of cooler and more moist air in at lower levels of the atmosphere. Aloft, there is some warm air so a rather significant low-level inversion will trap the moist air and resultant layer of low clouds with just a few brief breaks or no sunshine at all once the overcast arrives this morning as it presses west and southwest to the Connecticut River Valley. The tightening pressure gradient and cool air push will ramp up the northeasterly wind to 10-25 mph with the most brisk conditions at exposed coastal locations. The temperatures will sluggishly rise to near or just under 60 by midday then perhaps trickle back slightly as the afternoon progresses. For Game 1 of the ALCS at Fenway Park, the 8pm contest may be visited by a bit of fine mist at times with a northeasterly breeze at 10 mph and a temperature near 55 degrees. Later tonight, the region will be cloudy with perhaps some partial clearing in places with lows in the upper 40s to lower 50s for the most part.
As the zone of high pressure crests over the area tomorrow, it should turn out much sunnier although I cannot rule out some stubborn low cloudiness lingering in spots. A lighter easterly breeze will blow and the overall highs will be in the lower 60s. Low cloudiness and areas of fog may become widespread again tomorrow night with lows in the 40s to lower 50s. On Monday, Columbus Day, areas of low cloudiness and fog should burn off in the morning to reveal some sunshine with a bit of high and mid-level cloudiness above in the afternoon. It will be warmer with highs of 66-70 except lower 60s at the coast. A weakening frontal boundary will shift across NY on Monday with its band of clouds and a few spotty showers. This activity will wane as it moves into VT and northern NH in the afternoon. Expect partly cloudy weather Tuesday and Wednesday with a low risk of any showers mainly up north and highs in the upper 60s to 70 degrees or so. The next bigger weather maker will be in the form of a storm developing over the Rockies on Monday then transiting across the Plains States to the Midwest on Tuesday. The system will cross the Great Lakes on Wednesday and its trailing cold front will sweep eastward and spill a swath of showers over New England Thursday afternoon and evening with clearing to follow by dawn next Friday. Presently, the early outlook calls for mainly sunny weather and 55-60 next Saturday with rain arriving by midday on Sunday.
This is the big weekend for leaf peepers as the fall foliage extravaganza maxes out in much of the area farther north and west of Boston. Keep in mind that it is already past peak over the northern and western mountains. As you travel around the New England region, you will find foliage color varying from muted to vibrant. For more detailed information, logon to leaf peepers.
Have a happy and safe weekend.