DAYS 1-5 (MAY 31 – JUNE 4)
A transition from the feel of summer to the feel of earlier spring takes place today as we see a strong back-door cold front, which has already reached the NH Seacoast as of 7 a.m., power its way southwestward across the WHW forecast area during the morning and early afternoon today, and by the end of the day the entire region will be immersed in a maritime polar air mass. After this, the boundary sits just to our southwest while a weak disturbance passes by tonight from northwest to southeast, a stronger one follows it up later Wednesday, and yet another comes along Thursday night into Friday. This points to an unsettled first 3 days of June for our region, with the wettest periods most likely being Wednesday PM & Friday AM, leaving a good part of Thursday rain-free – however don’t expect much sun at all, other than some limited amounts today. Finally by Saturday, a stronger push of dry air from eastern Canada will clear us out to start the weekend.
TODAY: Partial sun, then mostly cloudy. Chance of drizzle eastern coastal areas by late-day. Highs 68-75 NH Seacoast and Cape Ann / Cape Cod MA and 75-82 elsewhere this morning, falling thereafter to 56-63 by late-day. Wind shifting to NE 5-15 MPH with higher gusts from northeast to southwest across the region this morning after starting out W up to 10 MPH.
TONIGHT: Cloudy. Areas of drizzle and fog, especially near the coast. Isolated to scattered showers and thunderstorms possible, mainly evening. Lows 51-58. Wind NE 5-15 MPH, higher gusts possible near the coast early.
WEDNESDAY: Cloudy. Areas of drizzle and fog, especially near the coast. Scattered to numerous showers and thunderstorms, mainly late afternoon. Highs 55-62. Wind E 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Chance of showers. Patchy drizzle/fog. Lows 51-58. Wind SE up to 10 MPH.
THURSDAY: Mostly cloudy. Highs 62-69, coolest South Coast. Wind variable up to 10 MPH.
THURSDAY NIGHT: Mostly cloudy. Chance of showers, especially overnight. Patchy fog. Lows 55-62. Wind variable up to 10 MPH.
FRIDAY: Mostly cloudy. Showers likely, favoring the morning and midday. Patchy fog. Highs 63-70, coolest coast. Wind variable to N up to 10 MPH.
FRIDAY NIGHT: Clouds break evening. Clearing overnight. Patchy fog early. Lows 52-59. Wind N 5-15 MPH.
SATURDAY: Sun and passing clouds. Highs 71-78. Wind N 5-15 MPH.
DAYS 6-10 (JUNE 5-9)
High pressure should continue a fair weather weekend through June 5. Potential unsettled period June 6-8 with a frontal boundary nearby. Additionally, during this time we’ll likely be watching a low pressure area, originally of tropical origin but transitioning or transitioned to post-tropical, passing to our south without impact other than stirred up ocean waves, but its worth watching with with normal uncertainly this far out. High pressure should return with fair weather to end this period June 9.
DAYS 11-15 (JUNE 10-14)
A weak westerly flow should be the dominant pattern and we may find ourselves near a boundary between cool air to the north and warmer and more humid air to the south. This could increase chances of periodic shower activity but at this point it doesn’t look like a change to a wet pattern. No extremes of temperature expected into mid June.