Tuesday Forecast

7:24AM

DAYS 1-5 (SEPTEMBER 17-21)
High pressure dominates. It’s a dry pattern, but there are still things to talk about, such as the cooler air on a north to northeast wind through Wednesday, which may also bring in some low level ocean cloudiness for parts of the region anytime from later today into Wednesday, and maybe a patch of drizzle from the thickest clouds, and there is also the possibility of the first patchy frost of the season in typical interior low-lying cold spots Thursday morning as we’ll have perfect conditions for radiational cooling Wednesday night. We also will need to watch for increasing swells and some rough surf, due to well-offshore Hurricane Humberto, along the shoreline later this week, which will be a concern as we will also be turning warmer as high pressure sinks south of the region. This will send some people to the beaches for “one last go”, but with these conditions the rip current risk will be high, and many beaches are not staffed with life guards after Labor Day Weekend. Extra caution will be imperative! I will repeat this reminder as the week goes on. Please tell your family/friends if you know they will be going to the coast.
Forecast details…
TUESDAY: Mostly sunny. Highs 64-71. Wind N-NE 5-15 MPH.
TUESDAY NIGHT: Variably cloudy, clouds favoring NH and eastern MA coastal areas where patchy drizzle may occur. Lows 43-50, coolest interior valleys. Wind light variable.
WEDNESDAY: Lots of clouds and limited sun morning, especially eastern MA and southeastern NH, then more sun. Highs 61-68. Wind NE 5-15 MPH.
WEDNESDAY NIGHT: Clear. Lows 35-42 interior low lying spots, 42-47 most areas, 47-52 coastline and urban centers. Wind light variable.
THURSDAY: Sunny. Highs 66-73. Wind light variable becoming SE under 10 MPH.
THURSDAY NIGHT: Clear. Patchy fog in low-lying interior locations. Lows 47-54. Wind light variable.
FRIDAY: Sunny. Highs 70-77. Wind S up to 10 MPH.
FRIDAY NIGHT: Clear. Lows 50-57. Wind SW up to 10 MPH.
SATURDAY: Mostly sunny. Highs 73-80. Wind SW 5-15 MPH.

DAYS 6-10 (SEPTEMBER 22-26)
A summer feel September 22-23 as we reach the autumnal equinox (September 23) with dry weather and much above normal temperatures. A series of cold fronts will knock temperatures back somewhat to near to above normal with a couple rounds of showers possible September 24-26.

DAYS 11-15 (SEPTEMBER 27-OCTOBER 1)
Another surge of significant warmth is possible in the last days of September and possibly to October 1 as high pressure in upper levels expands across the Northeast again. Dry weather would be dominant, with shower activity limited.

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Monday Forecast

7:12AM

DAYS 1-5 (SEPTEMBER 16-20)
The waning summer will deliver some of the best weather we’ve had all season, but we often see that in September, which is one of the nicest months in New England. There are 2 bumps in an otherwise smooth weather road this week, the first being a disturbance passing through the region today that may kick off a shower. This system is faster-moving and weaker than I originally thought it would be. The second is a cold front that slides down the coast from the northeast early Wednesday and may introduce a period of cloudiness and brief shower/drizzle with just enough moisture available. Temperatures will be near to slightly below normal as high pressure will be centered north of the region through Thursday, but as the center sinks to the south a quick warm-up is in the cards for the end of the week.
Forecast details…
TODAY: Variably cloudy with a few showers possible through midday, then clearing north to south. Highs 67-74. Wind NW-N 5-15 MPH.
TONIGHT: Clear. Patchy valley, swamp, and bog fog. Lows 46-53. Wind N under 10 MPH.
TUESDAY: Mostly sunny. Highs 64-71. Wind N-NE 5-15 MPH.
TUESDAY NIGHT: Clear evening. Clouds arrive NH Seacoast and MA East Coast toward dawn with a possible shower or period of drizzle. Lows 43-50, coolest interior valleys. Wind light variable.
WEDNESDAY: Lots of clouds to start, especially eastern MA and southeastern NH, then sun increases. Highs 61-68. Wind NE 5-15 MPH.
WEDNESDAY NIGHT: Clear. Lows 45-52. Wind light variable.
THURSDAY: Sunny. Highs 66-73. Wind light variable.
THURSDAY NIGHT: Clear. Patchy fog in low-lying interior locations. Lows 47-54. Wind light variable.
FRIDAY: Sunny. Highs 70-77. Wind S up to 10 MPH.

DAYS 6-10 (SEPTEMBER 21-25)
The September 21-22 weekend, the last of the summer, looks like it will represent well with dry weather and above normal temperatures. Hurricane Humberto will have just made its closest pass to New England about 600 miles offshore, much to far for any direct weather impact, but close enough to send some larger ocean swells to the New England Coast during the weekend – keep that in mind of sneaking in one more round of beach or boating. A couple disturbances from the west may bring a round or 2 of showers during the September 23-25 period, but overall it will still be on the dry side with temperatures averaging above normal.

DAYS 11-15 (SEPTEMBER 26-30)
Staying with a slow transition, still on the milder side, but better opportunities for showers at times heading into late September as the jet stream sinks to the south to send more disturbances this way while a high pressure ridge tries to hang on to the south and east of New England.

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Sunday Forecast

7:28AM

DAYS 1-5 (SEPTEMBER 15-19)
No changes for today’s update. High pressure southwest of the region sends a warm/dry westerly air flow across southern New England today, a very nice late summer day. A disturbance dives out of Canada and across the region the first half of Monday, possibly triggering some showers and maybe even a thunderstorm. This will be followed by another push of high pressure from Canada with pleasant weather Tuesday into midweek.
Forecast details…
TODAY: Early morning clouds Cape Cod & Islands with a few showers crossing the Islands, otherwise mostly sunny. Less humid. Highs 75-82. Wind W 5-15 MPH.
TONIGHT: Mostly clear evening. Increasing clouds overnight. Lows 55-62. Wind W 5-15 MPH.
MONDAY: Mostly cloudy with scattered showers and a slight risk of a thunderstorm morning-midday. Clearing north to south afternoon. Highs 66-73. Wind W 10-15 MPH shifting to N with higher gusts.
MONDAY NIGHT: Clear. Patchy valley, swamp, and bog fog. Lows 45-52. Wind N diminishing to under 10 MPH.
TUESDAY: Mostly sunny. Highs 63-70. Wind NE 5-15 MPH, higher gusts.
TUESDAY NIGHT: Mostly clear. Lows 43-50, coolest interior valleys. Wind light variable.
WEDNESDAY: Mostly sunny. Highs 64-71. Wind E up to 10 MPH.
WEDNESDAY NIGHT: Clear. Lows 45-52. Wind light variable.
THURSDAY: Sunny. Highs 67-74. Wind light variable.

DAYS 6-10 (SEPTEMBER 20-24)
High pressure surface and aloft will provide fair weather and above normal temperatures for the final 3 days of summer September 20-22. High pressure gives way to an approaching trough from the west, slowly, and while still mild it will start to turn more unsettled later in the period.

DAYS 11-15 (SEPTEMBER 25-29)
Staying with a slow transition, still on the milder side, but better opportunities for showers at times heading into late September as the jet stream sinks to the south to send more disturbances this way while a high pressure ridge tries to hang on to the south and east of New England.

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Saturday Forecast

8:31AM

DAYS 1-5 (SEPTEMBER 14-18)
A weak cold front approach the region today and pass through tonight and very early Sunday. This front will produce plenty of cloudiness but limited shower activity, although a few of the showers that form south of Boston during the late night hours may be on the heavy side. High pressure builds in Sunday, but it will be a warm day. In fact it will be one of those instances because of today’s cloud cover and tomorrow’s modified air mass that the air behind a cold front will actually be warmer than the air ahead of it for most of the region. A disturbance will cross New England Monday morning and midday and drag a stronger cold front through. This system will bring a shower threat as well. High pressure builds in behind that with great weather Tuesday and Wednesday.
Forecast details…
TODAY: Mostly cloudy. Risk of passing showers mid-day on. More humid. Highs 68-75. Wind S 5-15 MPH inland, 10-20 MPH coast, higher gusts.
TONIGHT: Mostly cloudy. Risk of passing showers, trending toward the South Coast where a few may be heavy. Humid. Lows 60-67. Wind S 10-20 MPH and gusty, shifting to W.
SUNDAY: Clouds and showers may linger Cape Cod and Islands early, otherwise mostly sunny. Less humid. Highs 75-82. Wind W 5-15 MPH.
SUNDAY NIGHT: Increasing clouds. Lows 55-62. Wind W 5-15 MPH.
MONDAY: Mostly cloudy with scattered showers and a slight risk of a thunderstorm morning-midday. Gradual clearing north to south afternoon. Highs 66-73. Wind W 10-15 MPH shifting to N with higher gusts.
MONDAY NIGHT: Clear. Patchy valley, swamp, and bog fog. Lows 45-52. Wind N diminishing to under 10 MPH.
TUESDAY: Mostly sunny. Highs 63-70. Wind NE 5-15 MPH, higher gusts.
TUESDAY NIGHT: Mostly clear. Lows 43-50, coolest interior valleys. Wind light variable.
WEDNESDAY: Mostly sunny. Highs 64-71. Wind E up to 10 MPH.

DAYS 6-10 (SEPTEMBER 19-23)
High pressure surface and aloft will provide fair weather and above normal temperatures and, as it looks now, will keep tropical activity to the south and east of New England. The end of the period may cool slightly as a new high pressure area arrives via eastern Canada. Rainfall will be very limited and possibly non-existent during this period. We may need to watch for increased fire danger as we’ve been rather dry since the start of August.

DAYS 11-15 (SEPTEMBER 24-28)
This remains a lower than average confidence forecast due to still some unknown potential tropical weather factors and their direct or indirect impact on the larger scale pattern. For now, going to delay the onset of cooling and keep an overall mild to warm outlook with better opportunities for showers at times. Many stages of fine-tuning to come.

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Friday Forecast

7:13AM

DAYS 1-5 (SEPTEMBER 13-17)
Variable temperature pattern, lack of rain, the themes for this 5-day period. High pressure from Canada brings a northeast air flow and cool/dry air today, then shifts offshore for a more humid, warmer southern flow ahead of a cold front Saturday. This front will cross the region early Sunday, but doesn’t have much cooler air behind it, so Sunday will be warm still, while being a little less humid than Saturday. But another disturbance will cross northern New England by early Monday and drag its cold front through from north to south, and cooler air will return courtesy high pressure from eastern Canada early next week.
Forecast details…
TODAY: Sunny. Highs 62-69. Wind NE 5-15 MPH.
TONIGHT: Partly cloudy. Lows 52-59. Wind E to SE up to 10 MPH.
SATURDAY: Partly sunny. Chance of a passing shower mainly late-day. More humid. Highs 78-85. Wind S to SW 10-20 MPH.
SATURDAY NIGHT: Variably cloudy with a passing shower or thunderstorm. Moderately humid. Wind SW 5-15 MPH.
SUNDAY: Mostly sunny. Less humid. Highs 77-84. Wind W 5-15 MPH.
SUNDAY NIGHT: Partly cloudy. Lows 57-64. Wind W 5-15 MPH.
MONDAY: Partly sunny. A passing shower possible. Highs 68-75. Wind W 5-15 MPH shifting to N with higher gusts.
MONDAY NIGHT: Mostly clear. Lows 47-53. Wind N 5-15 MPH.
TUESDAY: Mostly sunny. Highs 63-70. Wind NE 5-15 MPH.

DAYS 6-10 (SEPTEMBER 18-22)
High pressure will be dominant at upper levels through the period with surface high pressure shifting southward allowing temperatures to warm back to above normal. We’ll need to watch for possible tropical activity near or off the coast, or south of New England, later in the period, as we will enter a pattern that makes our area more vulnerable to being impacted by it.

DAYS 11-15 (SEPTEMBER 23-27)
Pattern remains warm with high pressure aloft and surface high pressure to south at first, but disturbances coming along the jet stream as well as potential tropical moisture near the US East Coast will work on shifting the pattern to wetter and not quite as warm by mid or late period. This remains low confidence so there will be a lot to work out as these days get closer.

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Thursday Forecast

7:30AM

DAYS 1-5 (SEPTEMBER 12-16)
Transition from the feel of summer yesterday to the feel of fall occurs today as a cold front slips southward through the region, triggered showers and a few thunderstorms, and an additional period of rain in some areas as a disturbance rides along the front. This was the scenario talked about as a possibility several days ago (recall watching the September 12-13 period for a slow front and possible disturbance). Luckily the unsettled weather will all occur today and as high pressure builds out of eastern Canada Friday we’ll have a bright and brisk fall-like day as we count down through the late days of summer. And that summer feel will make a bit of a comeback this weekend as we get back into a southerly air flow as high pressure slides to the east of New England Saturday and a westerly flow Sunday behind a weak cold front which will come through as it trails low pressure passing north of the region Saturday night. The new high pressure area that builds in Sunday will be smaller and centered southwest of the area, hence the westerly wind, then join up with the departed high to the south to keep it fairly warm, but this will allow yet another cold front to slip southward out of Canada early Monday and high pressure behind that will drop the temperatures again during Monday as our temperature roller coaster goes on.
Forecast details…
TODAY: Mostly cloudy. Scattered showers and embedded thunderstorms favoring central and southern MA as well as eastern CT and RI morning. General showers or a period of rain midday and first half of afternoon, favoring MA/CT/RI. Highs 66-73 early morning, then temperatures falling through the 60s reaching 56-63 by late-day. Wind SW 5-15 MPH near the South Coast early otherwise shifting to N 5-15 MPH.
TONIGHT: Clearing. Lows 48-55. Wind N to NE 5-15 MPH.
FRIDAY: Sunny. Highs 62-69. Wind NE 5-15 MPH.
FRIDAY NIGHT: Partly cloudy. Lows 52-59. Wind E to SE up to 10 MPH.
SATURDAY: Partly sunny. Chance of a passing shower or thunderstorm mainly late-day. More humid. Highs 78-85. Wind S to SW 10-20 MPH.
SATURDAY NIGHT: Variably cloudy with a passing shower or thunderstorm possible early, then partly cloudy. Moderately humid. Wind SW 5-15 MPH.
SUNDAY: Mostly sunny. Less humid. Highs 77-84. Wind W 5-15 MPH.
SUNDAY NIGHT: Partly cloudy. Lows 57-64. Wind W 5-15 MPH.
MONDAY: Partly sunny. A passing shower possible. Highs 68-75. Wind W 5-15 MPH shifting to N with higher gusts.

DAYS 6-10 (SEPTEMBER 17-21)
High pressure will be dominant at upper levels through the period with surface high pressure shifting from north of the early at first, when it will be cooler/drier, to south of the region later, when it will turn warmer and somewhat more humid.

DAYS 11-15 (SEPTEMBER 22-26)
Pattern remains warm with high pressure aloft and surface high pressure to south at first, but disturbances coming along the jet stream as well as potential tropical moisture near the US East Coast will work on shifting the pattern to wetter and not quite as warm by mid or late period. This is low confidence in terms of any details so there will be a lot to work out as these days get closer.

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Wednesday Forecast

6:59AM

DAYS 1-5 (SEPTEMBER 11-15)
The feel of summer will be in full force today as we’ll sit at the northeastern corner of a large wedge of warm to hot air under a ridge of high pressure. Low pressure tracking across the St. Lawrence Valley from west to east dragged a warm front through, introducing this air to the region, which will hang around until a cold front sags southeastward through the area tonight and early Thursday, slowing its progress as a wave of low pressure ridges along it west to east. So Thursday is a transition day back to cooler, but will be somewhat unsettled. A stronger push of high pressure from eastern Canada will send the unsettled weather on its way and provide nice weather during Friday. This high will sink to the southeast and the return flow around it will drag the front back to the north and return the warm and more humid air to the region Saturday, which will once again be pushed away by Sunday as another cold front, though weaker than the first, comes through. So Sunday will be a nice day, drier, but still on the warm side.
Forecast details…
TODAY: Partly sunny. Isolated showers early morning. Isolated showers and a slight risk of thunderstorms late-day. Humid. Highs 75-82 South Coast, 83-90 elsewhere. Wind SW 5-15 MPH.
TONIGHT: Variably cloudy. Slight risk of a shower early. Humid. Lows 60-67. Wind SW 5-15 MPH shifting to N around dawn.
THURSDAY: Mostly cloudy. Isolated to scattered showers, favoring areas south of I-90. Less humid. Highs 68-75. Wind N 5-15 MPH.
THURSDAY NIGHT: Clearing. Lows 48-55. Wind N to NE 5-15 MPH.
FRIDAY: Sunny. Highs 62-69. Wind NE to E 5-15 MPH.
FRIDAY NIGHT: Partly cloudy. Lows 52-59. Wind E to SE up to 10 MPH.
SATURDAY: Partly sunny. Chance of a passing shower or thunderstorm mainly late-day. More humid. Highs 78-85. Wind S to SW 10-20 MPH.
SATURDAY NIGHT: Variably cloudy with a passing shower or thunderstorm possible early, then partly cloudy. Moderately humid. Wind SW 5-15 MPH.
SUNDAY: Mostly sunny. Less humid. Highs 77-84. Wind W 5-15 MPH.

DAYS 6-10 (SEPTEMBER 16-20)
Weak cold front passes by early September 16 and high pressure moves north of the region with a cool-down to start next week, then the high sinks south with a warm-up to follow. Mainly dry weather.

DAYS 11-15 (SEPTEMBER 21-25)
The opposite of the 6-10, starting warm, ending cooler and possibly unsettled as we watch high pressure offshore, a trough approaching from the west, and potential tropical moisture near the East Coast.

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Tuesday Forecast

7:16AM

DAYS 1-5 (SEPTEMBER 10-14)
Onshore flow ahead of a warm front has delivered ocean moisture in the form of low cloudiness which may be tough for the sun to burn though, as there will be high & middle clouds above this as a warm front approaches today, so don’t look for as much sun as I previously had indicated we could expected. Not the best forecast there. Anyway, shower activity with this front will be limited and mostly north of this area tonight and early Wednesday. Very warm and humid air does overtake the region Wednesday with a mid summer feel. A cold front will sink southward across the region Wednesday night and early Thursday, maybe producing a shower or thunderstorm, and the front will not sink too far south on Thursday so cloudiness may linger with a cooler day than Wednesday. A push of high pressure from Canada will bring more sun and cooler air still for Friday, but this high will quickly be offshore by Saturday morning and we’ll see a quick warm-up Saturday with an approaching but weakening cold front possibly causing a late-day shower or thunderstorm in limited locations.
Forecast details…
TODAY: Mostly cloudy to partly sunny. Highs 68-75. Wind SE up to 10 MPH.
TONIGHT: Mostly cloudy. Risk of a passing shower. Increasingly humid. Lows 57-64. Wind SW up to 10 MPH.
WEDNESDAY: Partly cloudy. Humid. Highs 83-90, a bit cooler South Coast. Wind SW 5-15 MPH.
WEDNESDAY NIGHT: Variably cloudy. Chance of a shower and a slight chance of a thunderstorm. Humid. Lows 60-67. Wind SW 5-15 MPH.
THURSDAY: Variably cloudy. Chance of a shower or thunderstorm South Coast early. Less humid. Highs 75-82. Wind SW 5-15 MPH shifting to NW late.
THURSDAY NIGHT: Mostly clear. Lows 50-57. Wind NW to N up to 10 MPH.
FRIDAY: Mostly sunny. Highs 65-72. Wind N to NE 5-15 MPH.
FRIDAY NIGHT: Mostly clear. Lows 45-52 Wind light variable.
SATURDAY: Mostly to partly sunny. More humid. Slight risk of a late day shower or thunderstorm. Highs 75-82. Wind S to SW 5-15 MPH.

DAYS 6-10 (SEPTEMBER 15-19)
A new high pressure area arrives from the west with warm but drier air September 15. Above normal temperatures continue September 16-18 with high pressure dominating. A front in the region at the end of the period may trigger showers with higher humidity.

DAYS 11-15 (SEPTEMBER 20-24)
Overall dry with above normal temperatures as high pressure remains the dominant player.

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Monday Forecast

7:13AM

DAYS 1-5 (SEPTEMBER 9-13)
High pressure brings fair and seasonably cool weather to start the week, then a warm front brings a risk of showers early Wednesday, opening the door to the feel of summer during Wednesday and into Thursday as a cold front is slow to make its way through the region. Finally by Friday, high pressure in eastern Canada pushes another batch of cooler air into the region.
Forecast details…
MONDAY: Partly sunny. Highs 68-75. Wind light variable with coastal sea breezes.
MONDAY NIGHT: Partly cloudy. Lows 48-55. Wind W up to 10 MPH.
TUESDAY: Mostly sunny. Highs 73-80. Wind SE to S 5-10 MPH.
TUESDAY NIGHT: Increasing clouds. Risk of showers overnight. Lows 55-62. Wind S up to 10 MPH.
WEDNESDAY: Partly sunny. Chance of showers early. More humid. Highs 76-83. Wind SW 5-15 MPH.
WEDNESDAY NIGHT: Partly cloudy. Chance of a shower and a slight chance of a thunderstorm. Lows 60-67. Wind SW 5-15 MPH.
THURSDAY: Partly cloudy. Chance of a shower or thunderstorm. Highs 75-82. Wind SW 5-15 MPH shifting to NW late.
THURSDAY NIGHT: Mostly clear. Lows 50-57. Wind NW to N up to 10 MPH.
FRIDAY: Mostly sunny. Highs 65-72. Wind N to NE 5-15 MPH.

DAYS 6-10 (SEPTEMBER 14-18)
A weak cold front will wash out as it crosses the region September 14 which will be a mild to warm day with just a risk of a shower. High pressure builds at the surface and aloft and brings generally fair weather and above normal temperatures for the balance of the period, though a trough or cold front coming along later in the period and high pressure from Canada may cool it down by about September 18.

DAYS 11-15 (SEPTEMBER 19-23)
Another surge of warmth from dominant high pressure followed by another late-period cool-down, depending on the timing of a jet stream disturbance.

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Sunday Forecast

7:42AM

DAYS 1-5 (SEPTEMBER 8-12)
High pressure will be the dominant player in our weather for 4 out of the next 5 days, with the only interruption being Wednesday as a low pressure area moving west to east across the region sends its warm front / cold front combo through with some shower activity. During the fair weather days, the temperature and wind will be determined by the position of high pressure, the first area of which will start out north of the region today then sink southward over the area Monday and just to the south Tuesday, with a second high from eastern Canada influencing the weather by Thursday.
Forecast details…
TODAY: Mostly sunny. Highs 67-74. Wind NW 5-15 MPH.
TONIGHT: Clear. Lows 46-53. Wind light variable.
MONDAY: Sunny. Highs 68-75. Wind light variable.
MONDAY NIGHT: Clear. Lows 48-55. Wind W up to 10 MPH.
TUESDAY: Mostly sunny. Highs 73-80. Wind SE to S 5-10 MPH.
TUESDAY NIGHT: Increasing clouds. Lows 55-62. Wind S up to 10 MPH.
WEDNESDAY: Variably cloudy. Chance of showers. Highs 68-75. Wind S to SW 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Chance of showers. Slight chance of a thunderstorm. Lows 60-67. Wind SW 5-15 MPH.
THURSDAY: Partly cloudy. Highs 70-77. Wind W 5-15 MPH shifting to N.

DAYS 6-10 (SEPTEMBER 13-17)
High pressure should be strong enough for fair weather September 13 but need to watch a boundary to the south. A front from the west comes through with a slight risk of a shower September 14 but overall the September 14-17 period looks dry with above normal temperatures as high pressure dominates surface and aloft.

DAYS 11-15 (SEPTEMBER 18-22)
Brief interruptions with shower threats early and again late period in an otherwise mainly dry and warmer than average pattern as high pressure holds control much of the time.

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