DAYS 1-5 (SEPTEMBER 19-23)
Discussion…
The final weekend of summer will feel more like a weekend in early October, and in some cases it may look like it, as some of the drought-stressed trees are starting to show color. As some locations reach the 30s, and even a few typical colder spots head for the freezing point for low temperatures Sunday morning, we’ll be seeing not only the leaves turning early but some of the first sub-40-degree air about 1 to 2 weeks ahead of what is considered the average date of occurrence. So, autumn is definitely getting a jump on us. But wait, is it really? This is a cool interlude, and will last several days, prolonged by the passage of Hurricane Teddy well east of New England early next week. As the storm heads for Nova Scotia and loses tropical characteristics, its wind field will expand, as transitioning cyclones have happen, and that will keep the cool northerly air flow going here through Tuesday. The only impact we are going to see from Teddy will be large ocean swells and rough surf along our coast, especially east-facing shores, building this weekend and peaking during Monday and Tuesday. So if you are planning an end-of-summer beach visit, please keep this in mind. While the air will be a bit chilly to draw most people into entering the water, if you are in or near the water, it will be risky, and is not recommended. If you choose to view the rough surf, please do so from a safe location! Getting a few good pics and/or video is not work risking your life for. As for the actual weather, besides the cool spell – oh yes, more of the same: dry weather for the entire 5-day period and the drought rolls on and worsens. The cool spell will come to an end Wednesday when the wind shifts to the west and drives warmer air in. We’ll also see a smoke-free sky for several days as the smoke plume from the western US wildfires has been pushed to the south of New England.
Details…
TODAY: Some ocean cloud bands South Shore & Cape Cod otherwise sunny. Highs 58-65. Dew point near 30. Wind NE 5-15 MPH with higher gusts.
TONIGHT: Mostly clear. Patchy frost and ground fog interior lower elevations. Lows 32-37 interior lowest elevations, 38-43 most other locations except 44-49 urban centers. Dew point near 30. Wind NE decreasing to under 10 MPH except 10-15 MPH in coastal areas.
SUNDAY: Passing clouds in some coastal areas otherwise sunny. Highs 57-64. Dew point near 30. Wind NE to N 5-15 MPH, a few higher gusts.
SUNDAY NIGHT: Clear. Patchy frost and ground fog mainly interior lower elevations. Lows 35-40 interior lower elevations, 40-47 elsewhere. Dew point lower to middle 30s. Wind N under 10 MPH.
MONDAY: Mostly sunny. Highs 58-65. Dew point 30s. Wind N 5-15 MPH.
MONDAY NIGHT: Partly cloudy. Lows 38-45. Dew point 30s. Wind N 5-15 MPH.
TUESDAY: Partly cloudy. Highs 58-65. Dew point 30s. Wind N to NW 10-20 MPH.
TUESDAY NIGHT: Mostly clear. Lows 40-47. Dew point near 40. Wind NW to W 5-15 MPH.
WEDNESDAY: Mostly sunny. Highs 70-77. Dew point near 50. Wind W 5-15 MPH.
DAYS 6-10 (SEPTEMBER 24-28)
Dry and warm September 24. A cold front brings the risk of a shower September 25 then a shot of cooler air follows with. Expecting high pressure to dominate for the September 26-27 weekend with a cool start then warming up. Next disturbance may bring unsettled weather at the end of the period.
DAYS 11-15 (SEPTEMBER 29 – OCTOBER 3)
Lower confidence forecast here but looking for fair weather to end September and the potential for a couple days of unsettled weather to start October. But I do not see a switch to a wetter pattern any time soon.