Sunday Forecast

6:45AM

DAYS 1-5 (MAY 27-31)
The summer portion of the holiday weekend is but a memory as the marine air has overtaken the region and will keep its hold through Monday, although you will notice an easing of the chill as Memorial Day goes on. Before that, today is the coolest and most damp time with a low overcast, areas of fog and drizzle, and a little rain for parts of the region as a disturbances passes just to the south of the region. The improvement that starts later Monday will progress quickly by early Tuesday and that day as well as the final 2 days of May at midweek will be spectacular late spring days. Forecast details…
TODAY: Overcast. Patchy fog and drizzle. Occasional showers favoring CT, RI, southeastern MA. Highs 53-60. Wind NE up to 10 MPH.
TONIGHT: Overcast. Patchy fog and drizzle. Lows 51-58. Wind E up to 10 MPH.
MONDAY – MEMORIAL DAY: Overcast with patchy fog and drizzle morning. Partial clearing afternoon. Highs 62-68 coast, 68-75 interior by late day. Wind variable up to 10 MPH.
MONDAY NIGHT: Complete clearing. Lows 53-59. Wind N up to 10 MPH.
TUESDAY: Mostly sunny. Highs 68-76 Cape Cod, 77-84 elsewhere. Wind N 5-15 MPH.
WEDNESDAY: Mostly sunny. Lows from the upper 40s interior valleys to upper 50s urban centers. Highs from the middle 70s to middle 80s, coolest coastal areas.
THURSDAY: Mostly sunny. Lows in the 50s. Highs from the upper 70s to middle 80s, coolest coastal areas.

DAYS 6-10 (JUNE 1-5)
June 1 is likely a warm day but an approaching frontal boundary from the northwest and a disturbance from the southwest that carries some tropical moisture, there will be an increasing shower and thunderstorm threat by later in the day which will carry into early June 2 too before a drier interlude, but a bit of a block in the atmosphere will turn winds onshore and June 3 may end up cool and somewhat damp, before drier air from the north wins the battle and pushes it all to the south later in the period. This continues, however, to be a fairly low confidence forecast with so many factors in play, so adjustments will be made as needed.

DAYS 6-10 (JUNE 6-10)
A couple periods of unsettled weather expected. Temperatures near to below normal.

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Saturday Forecast

8:30AM

DAYS 1-5 (MAY 26-30)
A little weather drama for the early part of the weekend termed the “unofficial start of summer” but more correctly termed “Memorial Day Weekend”. Whatever you want to call it, the weather will feel like mid summer for several hours today before a sharp back-door cold front puts an end to that, with estimate time of frontal passage in the 4PM-5PM zone for the NH Seacoast and northeastern MA, 5PM-6PM for the remainder of the North Shore through Boston, 6PM-7PM for the South Shore of MA, and 7PM or later for Cape Cod and the Islands through RI, with the boundary spreading westward and southwestward from there across the remainder of southeastern New England through the evening. You know the drill. In comes the marine area immediate behind it with a quick temperature drop at frontal passage then a slower drop and finally a level-off that will essentially put temperatures around 30 degrees cooler than their Saturday highs from late Saturday evening to sometime Monday morning (less of a contrast Cape Cod & Islands where it won’t be as warm to begin with). We’ll largely escape precipitation of any consequence during this holiday weekend, however it won’t be bone dry either. As is often observed with back-door fronts, showers and thunderstorms will travel southeastward across northern New England exiting via the Maine Coast, with a few stray ones possibly making it into southern NH and north central to northeastern MA. A pop up shower or brief storm is possible in any location an hour or so after the front passes but it’s low probability. As the front pushes even further south and west at night, it may trigger a few showers and storms that could reach eastern CT or RI but this is also fairly low probability. During Sunday, a disturbance passing south of the region may trigger additional showers and possible thunderstorms mainly in southeastern CT, southern RI, and Cape Cod MA with all areas vulnerable to patches of drizzle due to the marine air from Saturday night through early Monday. Drier air starting to work in may break the clouds during Monday with the day potentially ending much nicer than it begins. Once we get beyond the holiday weekend, high pressure and nice weather will settle in for Tuesday and Wednesday. Forecast details…
TODAY: Mostly sunny morning. Partly sunny afternoon. Becoming mostly cloudy northeast to southwest late day with isolated showers or thunderstorms possible, favoring southern NH and northeastern MA. Highs 76-83 South Coast and Cape Cod, 84-91 elsewhere, but a sharp temperature drop from northeast to southwest with the front with time estimates noted above. Wind SW to W 5-15 MPH, shifting to NE from northeast to southwest late-day possibly accompanied by a brief burst of wind up to 25 MPH.
TONIGHT: Overcast. Patchy fog and drizzle developing. Isolated showers/thunderstorms early. Lows 51-58. Wind NE up to 10 MPH.
SUNDAY: Overcast. Patchy fog and drizzle. Occasional showers favoring CT, RI, southeastern MA. Highs 53-60. Wind NE up to 10 MPH.
SUNDAY NIGHT: Overcast. Patchy fog and drizzle. Lows 51-58. Wind E up to 10 MPH.
MONDAY – MEMORIAL DAY: Overcast with patchy fog and drizzle morning. Clearing afternoon. Highs 62-68 coast, 68-75 interior by late day. Wind variable up to 10 MPH.
TUESDAY: Mostly sunny. Lows from the middle to upper 50s. Highs from the middle 70s to middle 80s, coolest Cape Cod.
WEDNESDAY: Mostly sunny. Lows from the upper 40s interior valleys to upper 50s urban centers. Highs from the middle 70s to middle 80s, coolest coastal areas.

DAYS 6-10 (MAY 31-JUNE 4)
Fair weather continues through May 31. An unsettled period of weather arrives early in June but it won’t be raining all of the time. Likely starts with a summer feel June 1 but a shower/thunderstorm threat as a front approaches late June 1 and moves through June 2. Unclear whether or not tropical moisture from the system in the Gulf of Mexico gets involved with this front, but it is a possibility. Watch for a temporary block to set up late in the period with wet weather to the south and cooler air to the north. Southeastern New England may end up between the 2, or the cooler air may win out and keep the moisture to the south. Low confidence forecast and much to resolve.

DAYS 6-10 (JUNE 5-9)
A cooler/unsettled period of weather is possible, but again low confidence here.

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Friday Forecast

6:48AM

DAYS 1-5 (MAY 25-29)
High pressure to the south will bring a summery feeling westerly air flow into the region today into Saturday before a back-door cold front puts a quick end to the summer preview by Saturday night and for the remainder of the Memorial Day Weekend, delivering much cooler air, especially for Sunday which will also turn out wet for parts of the region a wave of low pressure moves along the front just to the south. Conditions improve slightly for the holiday itself as that low moves away and drier air works in behind it, though still on the cool side of the front. High pressure returns Tuesday which will be fair and warmer. Forecast details…
TODAY: Mostly sunny. Highs 75-82 immediate South Coast and Cape Cod, 83-90 elsewhere. Wind W 10-20 MPH.
TONIGHT: Mostly clear. Lows 59-65. Wind W 5-15 MPH.
SATURDAY: Partly cloudy. Highs 75-82 South Coast, 83-90 elsewhere. Wind W 10-20 MPH.
SATURDAY NIGHT: Clouding over north to south. Slight chance of showers and thunderstorms. A sharp temperature drop sometime in the evening. Lows by morning 54-60. Wind shifting to N then NE 5-15 MPH but higher gusts.
SUNDAY: Overcast wit areas of fog and drizzle. Periods of rain, favoring southern areas. Temperatures steady 54-60 or may even fall slightly. Wind NE to E 5-15 MPH.
MONDAY – MEMORIAL DAY: Mostly cloudy to partly sunny. Lows in the 50s. Highs in the 60s.
TUESDAY: Mostly sunny to partly cloudy. Lows in the 50s. Highs from the upper 70s to middle 80s.

DAYS 6-10 (MAY 30-JUNE 3)
A weak front may pass by later May 30 or early May 31 but may only bring clouds and an isolated shower, otherwise fair weather will dominate through June 1 followed by the risk of showers and thunderstorms around the weekend of June 2-3. Temperatures near to above normal.

DAYS 11-15 (JUNE 4-8)
Temperatures turn cooler and a couple disturbances, including moisture from the south, may impact the region with wetter weather at times.

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Thursday Forecast

7:33AM

DAYS 1-5 (MAY 24-28)
High pressure will control the weather through Friday, with southeastern New England on the cooler side with an easterly fair flow today, then on the much warmer side with a westerly air flow Friday. Then we will see some more changes over the Memorial Day Weekend with a summery Saturday followed by a much cooler Sunday and Monday after a back-door cold front passes. The wild card at the moment is how much sun, if any, do we see on Sunday and Monday, pending the amount of low cloudiness and any dry air that migrates down from eastern Canada. For now, keeping the forecast as it was on yesterday’s post.
TODAY: Mostly sunny but partly sunny for a while Cape Cod and MA South Shore. Highs 58-65 coast, coolest Cape Cod, 66-72 interior. Wind E to SE 5-15 MPH.
TONIGHT: Clear. Patchy fog interior low elevations. Lows 49-56. Wind calm.
FRIDAY: Mostly sunny. Highs 75-82 immediate South Coast and Cape Cod, 83-90 elsewhere. Wind W 10-20 MPH.
FRIDAY NIGHT: Mostly clear. Lows 59-65. Wind W 5-15 MPH.
SATURDAY: Partly cloudy. Highs 75-82 South Coast, 83-90 elsewhere. Wind W 10-20 MPH.
SATURDAY NIGHT: Clouding over north to south. A sharp temperature drop sometime in the evening. Lows by morning 54-60. Wind shifting to N then NE 5-15 MPH but higher gusts.
SUNDAY: Mostly cloudy to partly sunny. Morning showers possible south of Boston. Possible coastal drizzle. Lows in the 50s. Highs in the 60s, coolest coast.
MONDAY – MEMORIAL DAY: Mostly cloudy to partly sunny. Lows in the 50s. Highs in the 60s.

DAYS 6-10 (MAY 29-JUNE 2)
Fair weather returns May 29 as high pressure moves over the region. A cold front moves through sometime in the May 30-31 time frame with possible passing showers. Fair and warm June 1 but possible showers by June 2 as another front arrives around that time.

DAYS 11-15 (JUNE 3-7)
The trend will be for cooler and somewhat unsettled weather to return for this period as upper level low pressure takes over the pattern for a while. This does not look like a major wet spell or major cool spell, nor is it expected to become a long-term pattern either.

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Wednesday Forecast

7:27AM

DAYS 1-5 (MAY 23-27)
Nice weather returns today but the only possible interruption is an isolated shower late from a disturbance traveling northwest to southeast across the region with a pocket of very cold air aloft passing over sun-heated ground. That is a recipe for pop up showers. Looking like this chance will be brief and limited to southern NH and northeastern MA, however. High pressure will control the weather Thursday and Friday, with wind direction making all the difference in temperature. Thursday we will see a cool onshore flow, while Friday is a land breeze from the west and an immediate significant warm up. When we get into Memorial Day Weekend it becomes more complicated (of course) as a cold front drops down from the north on Saturday, which itself will be another warm and somewhat more humid day. Other than a possible shower or thunderstorm with this front, its main impact is going to be to return the onshore flow and cooler air for Sunday, the wildcard being how much cloudiness and whether or not there will be any additional precipitation. I am playing this somewhat optimistically, thinking it may push far enough south to allow a pocket of drier air from eastern Canada to enter the mix. More to come as we get closer to and into the weekend. Forecast details…
TODAY: Partly to mostly sunny. Isolated shower possible late-day favoring southern NH and northeastern MA. Highs 68-75 South Coast, 76-83 elsewhere. Wind SW 5-15 MPH shifting to NW.
TONIGHT: Variably cloudy with a possible shower early, then clearing. Patchy fog interior valleys. Lows 48-54. Wind light NW early then calm.
THURSDAY: Mostly sunny but partly sunny for a while Cape Cod and MA South Shore. Highs 58-65 coast, coolest Cape Cod, 66-72 interior. Wind E to SE 5-15 MPH.
THURSDAY NIGHT: Clear. Patchy fog interior low elevations. Lows 49-56. Wind calm.
FRIDAY: Mostly sunny. Highs 75-82 immediate South Coast and Cape Cod, 83-90 elsewhere. Wind W 10-20 MPH.
SATURDAY: Partly sunny. Late day shower or thunderstorm possible. Lows in the 60s. Highs in the 80s except 70s some coastal areas.
SUNDAY: Mostly cloudy to partly sunny. Lows in the 50s. Highs in the 60s, coolest coast.

DAYS 6-10 (MAY 28-JUNE 1)
Cautiously optimistic that Memorial Day Monday May 28 and Tuesday May 29 are both mainly dry as high pressure holds moisture off to the south. A front drops out of Canada with a shower risk Wednesday May 30 and a shot of cooler air briefly for Thursday May 31 before a rapid warm up arrives to start June as high pressure sinks to the south. This is a fairly detailed try at this period so it is with moderate confidence and subject to adjustment.

DAYS 11-15 (JUNE 2-6)
The trend will be for cooler and somewhat unsettled weather to return for this period as upper level low pressure takes over the pattern for a while. This does not look like a major wet spell or major cool spell, nor is it expected to become a long-term pattern either.

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Tuesday Forecast

7:02AM

DAYS 1-5 (MAY 22-26)
A disturbance will move into the region today and exit later tonight, bringing an episode of wet weather later today into this evening. Another disturbance moving down from the northwest will bring the opportunity for a passing shower or even thunderstorm later Wednesday. High pressure will overtake the region Thursday and Friday, with this area on the cooler side of it including help from the ocean Thursday, then the warmer side Friday into the start of the holiday weekend Saturday as it sinks to the south. But a cold front approaches from the north later Saturday with a renewed shower and thunderstorm threat. Forecast details…
TODAY: Thickening overcast morning. Cloudy with areas of light rain this afternoon. Highs 66-72. Wind S up to 10 MPH.
TONIGHT: Mostly cloudy. Areas of rain early. A passing shower late. Patchy fog. Lows 53-59. Wind SW up to 10 MPH.
WEDNESDAY: Mostly cloudy early then partly cloudy with a passing late day or evening shower or thunderstorm possible. Highs 68-76. Wind NW 5-15 MPH shifting to NE late.
WEDNESDAY NIGHT: Variably cloudy with a possible shower early, then clearing. Lows 48-54. Wind NE 5-15 MPH.
THURSDAY: Mostly sunny but partly sunny for a while Cape Cod. Highs 58-65 coast, coolest Cape Cod, 66-72 interior. Wind NE to E 5-15 MPH.
FRIDAY: Mostly sunny. Lows in the 50s. Highs upper 60s to middle 70s coast, upper 70s to lower 80s interior.
SATURDAY: Partly sunny. Late day shower or thunderstorm possible. Lows in the 60s. Highs in the 80s except 70s some coastal areas.

DAYS 6-10 (MAY 27-31)
Current call for the remainder of the holiday weekend is for a lot of clouds and possibly a shower Sunday May 27, but more sun north later as a cold front sinks south of the region. Front hangs south of the region Memorial Day Monday May 28 with some cloudiness but dry weather. Front comes back to the north May 29 with a rain risk, somewhat dependent on how much tropical moisture from the Gulf of Mexico gets involved. A front brings passing showers then a shot of cooler air the last couple days of May.

DAYS 11-15 (JUNE 1-5)
Fair and warmer to start the period then unsettled and cooler weather follows this.

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Monday Forecast

7:22AM

DAYS 1-5 (MAY 21-25)
High pressure dominates the weather today which may be the pick of the week, but will be rivaled by Thursday and Friday when high pressure controls the weather again. In between, a disturbance will approach Tuesday and bring some wet weather late in the day or in the evening, and as it departs on Wednesday a cooler northerly air flow will take over and some chilly air aloft will keep some clouds in the region. Detailed forecast…
TODAY: Sunny. Highs 69-74 coast, 75-80 interior. Wind W under 10 MPH but coastal sea breezes possible.
TONIGHT: Increasing clouds. Lows 52-57. Wind SW under 10 MPH.
TUESDAY: Mostly cloudy. Light rain likely late day / evening. Highs 66-73. Wind S up to 10 MPH.
TUESDAY NIGHT: Mostly cloudy. Chance of light rain early. Patchy fog. Lows 53-59. Wind light variable.
WEDNESDAY: Partly sunny. Highs 68-75. Wind N 10-20 MPH.
THURSDAY: Mostly sunny. Lows in the 50s. Highs in the 70s.
FRIDAY: Mostly sunny. Lows in the 50s. Highs in the 80s except cooler some coastal areas.

DAYS 6-10 (MAY 26-30)
Early call on Memorial Day Weekend is fair/warm Saturday May 26 and then watching a front from the north and tropical moisture from the south during the Sunday May 27 and Monday May 28 period as either or both could get involved and make for a complex and variable situation. The later part of this period should be mild but will feature a shower threat.

DAYS 11-15 (MAY 31-JUNE 4)
A period of warmer and drier weather to end May and start June and then it may turn cooler and possibly unsettled at the end of the period.

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Sunday Forecast

8:10AM

DAYS 1-5 (MAY 20-24)
No changes so just a quick update. In the warm sector for a while today but a cold front brings a shower or thunderstorm to parts of the region this afternoon. Not cooling down much but just drying out for Monday. A bit cooler still Tuesday when a disturbance may bring showers. Fair weather returns midweek. Still watching a weak system for Thursday but that may end up as just a passing cloud event.
Detailed forecast…
TODAY: Mostly cloudy to partly sunny morning. Variably cloudy with passing showers and thunderstorms possible afternoon. Humid. Highs 65-72 coast, 72-78 interior. Wind SW 10-20 MPH, shifting to W late.
TONIGHT: Partly cloudy. Less humid. Lows 52-58. Wind W shifting to NW 5-15 MPH.
MONDAY: Mostly sunny. Highs 68-73 South Coast, 74-79 elsewhere. Wind W 5-15 MPH.
TUESDAY: Mostly cloudy. Chance of showers. Lows from the middle to upper 50s. Highs from the middle to upper 60s.
WEDNESDAY: Mostly sunny. Lows from the lower to middle 50s. Highs from the upper 60s to lower 70s coast, middle to upper 70s interior.
THURSDAY: Variably cloudy. Lows from the middle to upper 50s. Highs from the middle 60s to lower 70s.

DAYS 6-10 (MAY 25-29)
Not really making any changes here. This period we will have to watch tropical moisture to the south and a frontal boundary to the north. If both stay generally away it’s fairly dry and warmer than normal, but that may not be the case, so much refinement coming in future updates.

DAYS 11-15 (MAY 30-JUNE 3)
Unsettled weather is possible to end May then a period of fair weather expected to start June. Temperatures near to slightly above normal but there may be a cooler period especially in coastal locations.

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Saturday Forecast

8:52AM

DAYS 1-5 (MAY 19-23)
A warm front approaches today and eventually brings wet weather to the region from southwest to northeast. As its parent low passes north of New England on its eastward path, it will drag a cold front through the region on Sunday with some additional shower activity expected. High pressure builds in for a nice late May day on Monday before the next disturbance returns a chance of some wet weather by Tuesday. Detailed forecast…
TODAY: Thickening overcast. Rain arriving southwest to northeast late morning through mid afternoon then tapering to drizzle/showers late. Highs 55-60 coast, 60-65 interior. Wind E 5-15 MPH.
TONIGHT: Mostly cloudy. Areas of fog. Patchy drizzle and isolated showers. Lows 53-58 early then temperatures slowly rising to 60-65 late. Wind shifting to S then SW up to 10 MPH.
SUNDAY: Mostly cloudy with patchy fog and isolated showers morning. Partly sunny with passing showers and thunderstorms possible afternoon. Humid. Highs 65-72 coast, 72-78 interior. Wind SW 10-20 MPH, shifting to W late.
SUNDAY NIGHT: Partly cloudy. Less humid. Lows 52-58. Wind W shifting to NW 5-15 MPH.
MONDAY: Mostly sunny. Highs 68-73 South Coast, 74-79 elsewhere. Wind W 5-15 MPH.
TUESDAY: Mostly cloudy. Chance of showers. Lows from the middle to upper 50s. Highs from the middle to upper 60s.
WEDNESDAY: Mostly sunny. Lows from the lower to middle 50s. Highs from the upper 60s to middle 70s.

DAYS 6-10 (MAY 24-28)
A disturbance passes through with a shower threat May 24 and a front may linger in the area with isolated showers into May 25. A generally dry and warmer Memorial Day Weekend is the early call but will have to watch 2 things that can complicate the forecast, and those are a front that may approach from the north later in the weekend and tropical moisture that may approach from the south by about Memorial Day. This being quite distant, forecast-wise, there is plenty of time to fine-tune this forecast.

DAYS 11-15 (MAY 29-JUNE 2)
A little more unsettled with a front and a couple disturbances in the area the last few days of May before fair weather becomes more likely to start June. Temperatures near to slightly above normal but there may be a cooler period especially in coastal locations.

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Friday Forecast

7:33AM

DAYS 1-5 (MAY 18-22)
No big changes from yesterday’s, just minor tweaks. The onshore flow is back today with cool air and dominant cloudiness. A warm front approaches and eventually passes Saturday but a period of rain will accompany it. A cold front crosses the region during Sunday bringing the chance of showers. Not all of the weekend will be washed out, but it will be far from stellar. High pressure arrives with fair weather Monday before the next disturbance brings a chance of showers by Tuesday.
TODAY: Mostly cloudy. Highs 57-64. Wind NE 5-15 MPH.
TONIGHT: Cloudy. Lows 50-56. Wind NE to E up to 10 MPH.
SATURDAY: Cloudy. Periods of rain, mostly mid morning to mid afternoon. Highs 55-63, coolest coast. Wind E to SE up to 15 MPH.
SUNDAY: Variably cloudy. Scattered showers/thunderstorms. Lows in the 50s. Highs in the 60s coast, 70s interior.
MONDAY: Mostly sunny. Lows in the 50s. Highs in the 70s.
TUESDAY: Mostly cloudy. Chance of showers. Lows in the 50s. Highs in the 60s.

DAYS 6-10 (MAY 23-27)
Fair weather expected May 23. Another disturbance brings the next rain or shower chance about May 24 then it looks drier and warmer for the middle to end of this period.

DAYS 11-15 (MAY 28-JUNE 1)
Fair/warm weather expected early in the period, then a shower/thunderstorm threat increases to end May before fair weather returns at the end of the period.

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