DAYS 1-5 (MAY 1-5)
High pressure will bring us splendid weather for the first day of May today, with 100% sunshine, light wind, but a significant temperature spread from shoreline to inland locations, very typical of spring time in New England. Enjoy today especially since the timing allows it to be on a day off for many. The weather “goes downhill” for several days following, starting with the approach of a warm front Monday bringing clouds and an evening rain threat. But that front never gets through the region, first being held back as a wave of low pressure forms on the front and passes to the south of us Monday night, then staying down there as a little bubble of high pressure builds across northern New England Tuesday. Another low pressure area approaches Tuesday night and passes by during Wednesday, and while guidance shows what looks like a low that wants to pass just northwest of our area, it won’t, as high pressure in eastern Canada keeps the boundary just to the south and the low follows it, redeveloping or “wobbling” along the boundary until its passing to our south and out to sea, bringing wet weather for Wednesday. Finally by Thursday we should get a push of drier but cool air from Canada for a break in the cloudiness and occasional wet weather of the first part of the week…
TODAY: Sunny. Highs 55-62 coastline, 63-70 inland, mildest interior valleys. Wind variable up to 10 MPH with developing coastal sea breezes.
TONIGHT: Increasing high clouds. Lows 42-49. Wind variable under 10 MPH.
MONDAY: Thickening overcast. Highs 54-61, coolest coast. Wind SE up to 10 MPH.
MONDAY NIGHT: Cloudy. Periods of light rain. Patchy fog. Lows 45-52. Wind E up to 10 MPH.
TUESDAY: Mostly cloudy with a few glimpses of sun possible. Highs 57-64, coolest coast. Wind E up to 10 MPH.
TUESDAY NIGHT: Cloudy. Chance of rain overnight. Lows 46-53. Wind SE up to 10 MPH.
WEDNESDAY: Cloudy. Periods of rain. Areas of fog. Temperatures steady 47-54. Wind E 5-15 MPH.
WEDNESDAY NIGHT: Rain ends, clouds break, patchy fog dissipates. Lows 40-47. Wind N 5-15 MPH.
THURSDAY: Sun/cloud mix. Highs 57-64. Wind N 5-15 MPH, higher gusts.
DAYS 6-10 (MAY 6-10)
Large-scale pattern: Blocking with high pressure in eastern Canada and slowly eastward-moving low pressure areas to the south of that. We remain most vulnerable to cloudy and occasional wet weather in the May 6-8 period before drier/brighter weather later in the period. Temperatures below normal.
DAYS 11-15 (MAY 11-15)
Similar pattern should continue as we approach the half-way point of May, but the overall pattern should weaken somewhat and the appearance of more high pressure to the south of New England means that the warm-up potential is a little stronger, but also leaves us vulnerable to additional unsettled weather due to the boundary between that and the cooler high pressure in Canada. No chance on finding any day-to-day details this far in advance though. Check back for that!