9:27AM

DAYS 1-5 (MAY 19-23)
A warm front crosses the region this morning and will kick off scattered showers and possibly a thunderstorm, with most activity north of I-90 and a smaller area to the south. Once we get to afternoon the shower/storm threat drops off but the temperature and humidity go up. Another disturbance may bring a few showers/storms to the region tonight. When we get to Monday, most of the day in any given location will be rain-free, but we won’t be free of the risk of a passing shower or thunderstorm, although the greatest threat comes later day / evening with a cold front passing through the region. The risk for severe storms is there, with some supporting factors and some not as supporting. (There will be a comment posted below from the last blog that adequately explains it in more detail.) Once we get the front through the region, the summer preview of Monday ends and it’s back to seasonable but very nice weather Tuesday and Wednesday, before the next system diving out of Canada brings a shower risk on Thursday.
TODAY: Variably cloudy morning with passing showers and possible thunderstorms. Partly sunny afternoon. Highs 60-67 Cape Cod, 68-75 elsewhere except 75-80 some interior locations by late-day. Wind S 5-15 MPH.
TONIGHT: Variably cloudy. Passing showers and a slight risk of thunderstorms. More humid. Lows 56-63. Wind SW 5-15 MPH, higher gusts.
MONDAY: Partly sunny through most of afternoon with isolated showers and thunderstoroms possible. Mostly cloudy late-day with showers/thunderstorms possible. Any thunderstorms can be strong to severe. Humid. Highs 68-75 South Coast except cooler Cape Cod, 76-83 elsewhere. Wind SW 10-20 MPH, higher gusts.
MONDAY NIGHT: Mostly cloudy with showers and thunderstorms early, followed by clearing. Lowering humidity. Lows 55-62. Wind W 10-20 MPH, higher gusts possible.
TUESDAY: Sun and passing clouds. Highs 62-69. Wind NW 10-20 MPH, higher gusts.
TUESDAY NIGHT: Clearing. Lows 48-55. Wind NW 5-15 MPH.
WEDNESDAY: Mostly sunny. Highs 60-67, coolest coast. Wind light variable with sea breezes.
WEDNESDAY NIGHT: Partly cloudy. Lows 45-52. Wind light variable.
THURSDAY: Increasing clouds. Risk of showers especially late-day. Highs 63-70, coolest coast. Wind light variable to SE.

DAYS 6-10 (MAY 24-28)
Wet weather may hang on early May 24 with departing low pressure. A cold front may produce a few showers around May 25 and another approaching system may bring a shower risk later May 27 but most of the Memorial Day Weekend, as far as I can tell in advance, looks dry. Additional showers possible May 28 depending on the speed of the passing system. Temperatures near to above normal overall.

DAYS 11-15 (MAY 29-JUNE 2)
A little more west to east flow will allow a couple passing systems and shower/thunderstorms threats but the overall pattern should remain on the drier side most of the time with near to above normal temperatures.

10:26AM

DAYS 1-5 (MAY 18-22)
High pressure provides beautiful weather today, but the pressure gradient between its center to the west and low pressure in eastern Canada will create a gusty breeze, and as sunshine heats the ground and evaporates moisture out of it from plenty of recent rainfall, this air rising into colder air aloft may help to develop some cumulus clouds which will float across the sky and blot out the sunshine at times, if they can overcome the dry air aloft. If these clouds do pop, they will be gone by evening but some higher clouds will arrive this evening and increase overnight ahead of an advancing warm front, and this may make your Sunday start on the cloudier side, with even a risk of a passing rain shower as the front lifts through, but the warm air will move in with more sun developing during the day, as it also turns out warmer with an increase in humidity levels as well. The next forecast dilemma is to figure out how much cloudiness and shower and possible thunderstorm activity will take place while we are in the warm sector, which will be around until a cold front arrives late Monday. I think a disturbance crosses the region with a shower and possible thunderstorm sometime Sunday night, but gets out of the way by early Monday, which will be largely rain-free, although the opportunity for a passing shower will be there, and then a more general shower and thunderstorm threat should occur late-day or early-night with the front. How much sun Monday? I think enough that some areas reach or exceed 80, but maybe not well into the range of 80-87 that I had on the previous blog, so I’m going to trim off the top part of that. Either way, Monday will be a preview of summer in comparison to much of our recent weather. Post cold front we get back to some nice spring weather Tuesday and Wednesday of next week as high pressure arrives from Canada, west of the region enough with low pressure offshore so we have a gusty breeze Tuesday, then tranquil but with sea breezes Wednesday.
TODAY: Sunshine, with a few passing clouds possible. Highs 58-65 Cape Cod, 65-72 elsewhere. Wind NW 10-20 MPH.
TONIGHT: Partly cloudy evening. Mostly cloudy overnight. Lows 45-52. Wind light variable.
SUNDAY: Mostly cloudy to partly sunny morning with a slight risk of a passing rain shower northern MA and southern NH. Partly to mostly sunny afternoon. Highs 60-67 Cape Cod, 68-75 elsewhere except 75-80 some interior locations by late-day. Wind S 5-15 MPH.
SUNDAY NIGHT: Variably cloudy. Passing showers and a slight risk of thunderstorms. More humid. Lows 56-63. Wind SW 5-15 MPH, higher gusts.
MONDAY: Partly sunny through most of afternoon with isolated showers possible. Mostly cloudy late-day with showers/thunderstorms possible. Humid. Highs 68-75 South Coast except cooler Cape Cod, 76-83 elsewhere. Wind SW 10-20 MPH, higher gusts.
MONDAY NIGHT: Mostly cloudy with showers and thunderstorms early, followed by clearing. Lowering humidity. Lows 55-62. Wind W 10-20 MPH, higher gusts possible.
TUESDAY: Sun and passing clouds. Highs 62-69. Wind NW 10-20 MPH, higher gusts.
TUESDAY NIGHT: Clearing. Lows 48-55. Wind NW 5-15 MPH.
WEDNESDAY: Mostly sunny. Highs 60-67, coolest coast. Wind light variable with sea breezes.

DAYS 6-10 (MAY 23-27)
As discussed previously, I believe the pattern that evolves is one that puts the mean ridge of high pressure in the Great Lakes / Midwest area with troughs both to the west and east of it, but the eastern trough being far enough east that this area will often be on the drier side of the pattern overall. However, “ridge riders” or disturbances that come up and over the ridge can still bring episodic unsettled weather and are very hard to time. Right now, the favored timing for such disturbances passing through with shower or rain threats are May 24 and May 27. And “rain threats” does not necessarily translate into “rainy days” either. These systems can be weak, and fast, and produce very little, or they can dig a little more and produce a bit more rainfall. We’ll just have to keep an eye on the pattern for timing.

DAYS 11-15 (MAY 28-JUNE 1)
Same general idea for the pattern but it may de-amplify some allowing a little more trough into New England before May ends, with a round of rain possible. I think the majority of this period will also be rain-free, with temperatures not all that far from seasonal averages.

7:25AM

DAYS 1-5 (MAY 17-21)
A low pressure system will send its warm front / cold front combo through southern New England today, producing some spring showers (hey it’s all in the wording, right?). High pressure builds in for a beautiful Saturday, warmest inland, cooler near the coast with sea breezes. A warm front will cross the region Sunday with some cloudiness but the shower threat appears to be very limited, so count it as a basically dry day, and turning warmer. And the warm air will be quite established for Monday, which will be a preview of summer, and may feature a late-day shower/thunderstorm threat as a cold front approaches. Behind that front will come a comfortable and dry day Tuesday. Yes folks, the weather pattern has changed. All you needed was some patience. 🙂
Forecast details…
FRIDAY: Mostly cloudy. Rain showers likely through mid morning favoring areas north of I-90. Isolated to scattered rain showers thereafter. Slight risk of a thunderstorm late-day. Highs 60-67. Wind W 5-15 MPH.
TONIGHT: Clearing. Lows 45-52. Wind NW 5-15 MPH.
SATURDAY: Mostly sunny. Highs 63-70. Wind NW 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 42-47 interior/rural, 47-52 coastal/urban. Wind light NW.
SUNDAY: Variably cloudy morning with a slight risk of a passing rain shower especially northern MA and southern NH, then mostly sunny. Highs 65-72 South Coast, 73-80 elsewhere, occurring late-day many areas. Wind light variable becoming S then SW increasing to 10-20 MPH.
SUNDAY NIGHT: Partly cloudy. Patchy fog. More humid. Lows 55-62. Wind S to SW 5-15 MPH.
MONDAY: Partly sunny. Late day showers or thunderstorms possible. Humid. Highs 65-72 Cape Cod, 73-80 remainder of southeastern MA and immediate RI shore as well as parts of Cape Ann MA, 80-87 elsewhere. Wind SW 10-20 MPH.
MONDAY NIGHT: Mostly cloudy with a shower or thunderstorm possible early, then clearing. Lows 53-60. Wind W 5-15 MPH.
TUESDAY: Sun and passing clouds. Drier. Highs 63-70. Wind NW 10-20 MPH.

DAYS 6-10 (MAY 22-26)
Overall upper pattern will feature a ridge of high pressure centered just west of New England. A few disturbances may still bring episodes of unsettled weather but the emphasis will be on fair weather and temperatures near to above normal.

DAYS 11-15 (MAY 27-31)
High pressure should strengthen for a drier, warmer pattern, but with cooler coastal areas at times. We will still have to watch jet stream disturbances passing over the top of the ridge. Any of them strong enough can dig a temporary trough and bring brief unsettled weather.

7:27AM

DAYS 1-5 (MAY 16-20)
Drier air has helped clear things out to start today but cold air aloft still means that scattered instability showers may pop during the day, especially mid afternoon to early evening. Low pressure will track north of the region Friday and a warm front / cold front combo will bring a couple rain shower threats. High pressure moves in for great weather Saturday. Sunday, a warm front will cross the region with some cloudiness and perhaps a brief rain shower but otherwise Sunday-Monday end up mainly rain-free and mild to warm. A cold front should hold off until later Monday with the next threat of any wet weather.
Forecast details…
TODAY: Variably cloudy. Scattered rain showers mid afternoon on. Isolated thunderstorms with small hail possible. Highs 57-64. Wind W 5-15 MPH.
TONIGHT: Partly cloudy. Isolated rain showers early. Lows 45-52. Wind W 5-15 MPH.
FRIDAY: Mostly cloudy. Chance of rain showers. Highs 60-67. Wind W 5-15 MPH.
FRIDAY NIGHT: Clearing. Lows 45-52. Wind NW 5-15 MPH.
SATURDAY: Mostly sunny. Highs 63-70. Wind NW 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 42-47 interior/rural, 47-52 coastal/urban. Wind light NW.
SUNDAY: Variably cloudy. Risk of a rain shower morning. Highs 60-67, coolest coast. Wind light variable with sea breezes, then S to SW 5-15 MPH later.
SUNDAY NIGHT: Partly cloudy. Lows 50-57. Wind S to SW 5-15 MPH.
MONDAY: Partly sunny. Late day showers or thunderstorms possible. Highs 65-72 coast, 73-80 interior. Wind SW 10-20 MPH.

DAYS 6-10 (MAY 21-25)
Overall upper pattern evolves to put this area on the eastern side of a high pressure ridge, but still with the ability to pass some disturbances through the flow, so there may be episodes of showers to still watch for, but with overall milder temperatures on average. However coastal areas may be significantly cooler on some of these days.

DAYS 11-15 (MAY 26-30)
High pressure should strengthen for a drier, warmer pattern, but with cooler coastal areas at times. We will still have to watch jet stream disturbances passing over the top of the ridge. Any of them strong enough can dig a temporary trough and bring some unsettled weather.

7:40AM

DAYS 1-5 (MAY 15-19)
Upper level low pressure hangs around and a couple disturbances pass by during the next 3 days as we slowly transition out of the current pattern and toward a different one, which will arrive by the weekend as high pressure moves in with fair weather.
Forecast details…
TODAY: Variably cloudy. Isolated rain showers. Highs 55-62. Wind N 10-20 MPH.
TONIGHT: Variably cloudy. Isolated rain showers. Lows 42-49. Wind W 5-15 MPH.
THURSDAY: Variably cloudy. Scattered rain showers. Highs 57-64. Wind W 5-15 MPH.
THURSDAY NIGHT: Partly cloudy. Lows 45-52. Wind W 5-15 MPH.
FRIDAY: Variably cloudy. Chance of rain showers. Highs 60-67. Wind W 5-15 MPH.
FRIDAY NIGHT: Clearing. Lows 45-52. Wind NW 5-15 MPH.
SATURDAY: Mostly sunny. Highs 63-70. Wind NW 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 42-47 interior/rural, 47-52 coastal/urban. Wind light NW.
SUNDAY: Mostly sunny. Highs 60-67, coolest coast. Wind light NW to N with coastal sea breezes.

DAYS 6-10 (MAY 20-24)
Overall upper pattern evolves to put this area on the eastern side of a high pressure ridge, but still with the ability to pass some disturbances through the flow, so there may be episodes of showers to still watch for, but with overall milder temperatures on average. However coastal areas may be significantly cooler on some of these days.

DAYS 11-15 (MAY 25-29)
High pressure should strengthen for a drier, warmer pattern, but with cooler coastal areas at times.

7:28AM

DAYS 1-5 (MAY 14-18)
Upper level low pressure will dominate the period but will be shifting far enough to the east by the end of it for a warm-up to begin. Wettest weather will be early today, but other shower threats will exist through Friday as a series of disturbances pass through the region.
Forecast details…
TODAY: Overcast with rain tapering off to rain showers morning. Mostly cloudy with scattered rain showers afternoon. Highs 41-48. Wind NE to N 10-20 MPH, higher gusts possible.
TONIGHT: Mostly cloudy. Lows 38-45. Wind N 5-15 MPH.
WEDNESDAY: Mostly cloudy. Isolated rain showers. Highs 51-58. Wind N 10-20 MPH.
WEDNESDAY NIGHT: Variably cloudy. Isolated rain showers. Lows 42-49. Wind W 5-15 MPH.
THURSDAY: Variably cloudy. Scattered rain showers. Highs 57-64. Wind W 5-15 MPH.
THURSDAY NIGHT: Partly cloudy. Lows 45-52. Wind W 5-15 MPH.
FRIDAY: Variably cloudy. Chance of rain showers. Highs 60-67. Wind W 5-15 MPH.
FRIDAY NIGHT: Clearing. Lows 45-52. Wind NW 5-15 MPH.
SATURDAY: Mostly sunny. Highs 63-70. Wind NW 5-15 MPH.

DAYS 6-10 (MAY 19-23)
A slow-moving pattern with low pressure centered near the Canadian Maritimes, high pressure Great Lakes, and a trough to the west of that, typical of springtime, will work in our favor with overall drier and somewhat warmer weather for a good part of this period.

DAYS 11-15 (MAY 24-28)
Turns wet and cooler to start the period then a return to drier, warmer thereafter.

7:40AM

DAYS 1-5 (MAY 13-17)
Unseasonably cool weather dominates the area for the early part of this week. Along with that will come unsettled weather as a coastal storm develops, making the weather map look a little bit like winter. In fact, enough cold air will be around that some of the precipitation, which begins later today as rain, may mix with or even turn to snow for a time tonight and early Tuesday in higher elevations. Snow in May in southern New England is quite rare, but certainly not unheard of. So once we get by that, it’s better, but not great, as upper level low pressure hangs around and additional disturbances drop into the flow and cause risks of showers mid to late week as well.
Forecast details…
TODAY: Some sunshine especially eastern MA and southeastern NH to start before clouds return. Rain develops southwest to northeast later in the day. Highs 48-55, coolest coast. Wind E 5-15 MPH.
TONIGHT: Overcast. Areas of fog. Rain likely, may mix with sleet/snow interior higher elevations where minor accumulation is possible. Lows 35-42. Wind NE 5-15 MPH interior, 10-20 MPH coast, with higher gusts.
TUESDAY: Overcast with rain tapering off to rain showers morning. Mostly cloudy with scattered rain showers afternoon. Highs 41-48. Wind NE to N 10-20 MPH, higher gusts possible.
TUESDAY NIGHT: Mostly cloudy. Lows 38-45. Wind N 5-15 MPH.
WEDNESDAY: Mostly cloudy. Scattered rain showers. Highs 51-58. Wind N 10-20 MPH.
WEDNESDAY NIGHT: Variably cloudy. Isolated rain showers. Lows 42-49. Wind W 5-15 MPH.
THURSDAY: Variably cloudy. Scattered rain showers. Highs 57-64. Wind W 5-15 MPH.
THURSDAY NIGHT: Partly cloudy. Lows 45-52. Wind W 5-15 MPH.
FRIDAY: Variably cloudy. Chance of rain showers. Highs 60-67. Wind W 5-15 MPH.

DAYS 6-10 (MAY 18-22)
Upper level low pressure may hang around for a couple days before being replaced by a flat ridge of high pressure. This period should be mostly dry, but not completely rain-free, though timing is uncertain on disturbances and shower threats, so will have to fine-tune that. The temperature trend should be warming, as it starts out below normal and ends near to above normal.

DAYS 11-15 (MAY 23-27)
Brief interruption of wet weather about May 24 in an otherwise warmer, drier pattern as it looks like we’ll be on the “better” side of a block overall.

8:20AM

DAYS 1-5 (MAY 12-16)
Moisture overcomes dry air for some wetter weather, still focused in areas to the south, at times today as one wave of low pressure passes south of the region. A second low will come up from the southwest Monday and Tuesday and pass very slowly, bringing unseasonably cold air and more wet weather, some of which may fall in the frozen form in some locations. Yes, it can happen in May. Slow midweek improvement but not total improvement as upper level low pressure hangs around.
Forecast details…
TODAY: Mainly cloudy. Periods of rain favoring southern areas. Rain may mix with sleet in some higher elevations. Highs 50-57. Wind light SE to E.
TONIGHT: Mainly cloudy. Lows 41-48. Wind light E.
MONDAY: Overcast. Areas of drizzle especially coastal locations. Rain arriving later in the day. Highs 45-52. Wind N to NE 5-15 MPH.
MONDAY NIGHT: Overcast. Rain and drizzle. Areas of fog. Lows 38-45. Wind NE 5-15 MPH, higher gusts.
TUESDAY: Overcast with periods of rain, may mix with sleet/snow for a time in the morning higher elevations. Highs 40-47. Wind NE to N 10-20 MPH.
TUESDAY NIGHT: Mostly cloudy. Lows 38-45. Wind N 5-15 MPH.
WEDNESDAY: Partly sunny. Scattered rain showers. Highs 50-57. Wind N 10-20 MPH.
WEDNESDAY NIGHT: Variably cloudy. Isolated rain showers. Lows 40-47. Wind N 5-15 MPH.
THURSDAY: Variably cloudy. Scattered rain showers. Highs 50-57. Wind N 5-15 MPH.

DAYS 6-10 (MAY 17-21)
Upper level low pressure may hang around for a couple days before being replaced by a flat ridge of high pressure. This period should be mostly dry, but not completely rain-free, though timing is uncertain on disturbances and shower threats, so will have to fine-tune that. The temperature trend should be warming, as it starts out below normal and ends near to above normal.

DAYS 11-15 (MAY 22-26)
Dry and mild start and end should flank a period of cooler/wet weather as low pressure passes during the middle of the period.

11:07AM

DAYS 1-5 (MAY 11-15)
High pressure moves in today with nice weather, and then attempts to hold off advancing low pressure from the southwest on Sunday, somewhat successfully, although not without some cloudiness and perhaps a little South Coast rainfall. A stronger push of low pressure then makes the early part of the week unsettled and quite cool, before the low gets east of the region for some drying but upper level low pressure keeps it cool and slightly unsettled for midweek.
Forecast details…
TODAY: Sun and passing clouds. Highs 59-66. Wind W 5-15 MPH and gusty.
TONIGHT: Mostly clear. Lows 40-47. Wind light W.
SUNDAY: Filtered sunshine north, cloudier south with a couple episodes of light rain possible South Coast. Highs 57-64. Wind light variable becoming SE.
SUNDAY NIGHT: Mostly cloudy. Lows 41-48. Wind light E.
MONDAY: Overcast. Areas of drizzle especially coastal locations. Rain arriving. Highs 47-54. Wind N to NE 5-15 MPH.
MONDAY NIGHT: Overcast. Rain and drizzle. Areas of fog. Lows 43-50. Wind NE 5-15 MPH, higher gusts.
TUESDAY: Overcast morning with rain tapering off. Mostly cloudy afternoon with scattered rain showers. Temperatures steady 43-50. Wind NE to N 10-20 MPH.
TUESDAY NIGHT: Mostly cloudy. Lows 38-45. Wind N 5-15 MPH.
WEDNESDAY: Partly sunny. Scattered rain showers. Highs 50-57. Wind N 10-20 MPH.

DAYS 6-10 (MAY 16-20)
Upper level low pressure may hang around for a couple days before being replaced by a flat ridge of high pressure. This period should be mostly dry, but not completely rain-free, though timing is uncertain on disturbances and shower threats, so will have to fine-tune that. The temperature trend should be warming, as it starts out below normal and ends near to above normal.

DAYS 11-15 (MAY 21-25)
Current thinking is a warm and dry start to the period with upper ridge overhead, then a wetter, cooler trend toward the end as low pressure arrives from the west.

6:53AM

DAYS 1-5 (MAY 10-14)
Low pressure tracks north of the region today, dragging a warm front through the region today with a few episodes of rain showers possible in any location, although it will rain a relatively small percentage of the day. The low’s trailing cold front will cross the region this evening with a broken band of showers and possible thunderstorms. That will be offshore overnight and set up a nice Saturday as high pressure moves in behind this system. This high will hold off an advancing low pressure area Sunday, maybe not keeping all of its cloudiness away but likely keeping all its rain south of the region. A stronger surge of low pressure will bring chilly and unsettled weather to the region early next week. But this is not a return to the pattern we’ve been in as systems are becoming more separated and we’re starting to see a tendency to stay on the drier side overall. It just won’t seem that way by Monday into Tuesday of next week…
Forecast details…
TODAY: Cloudy. Isolated to scattered rain showers. Highs 53-60 coast, 60-67 interior. Wind SE 5-15 MPH shifting to S.
TONIGHT: Mostly cloudy. Rain showers and possible thunderstorms evening, ending overnight west to east. Patchy fog. Lows 45-52. Wind W 5-15 MPH.
SATURDAY: Sun and passing clouds. Highs 59-66. Wind W 5-15 MPH and gusty.
SATURDAY NIGHT: Mostly clear. Lows 40-47. Wind light W.
SUNDAY: Variably cloudy. Highs 57-64. Wind light variable becoming SE.
SUNDAY NIGHT: Mostly cloudy. Lows 41-48. Wind light E.
MONDAY: Overcast. Areas of drizzle especially coastal locations. Rain arriving. Highs 47-54. Wind N to NE 5-15 MPH.
MONDAY NIGHT: Overcast. Rain and drizzle. Areas of fog. Lows 43-50. Wind NE 5-15 MPH, higher gusts.
TUESDAY: Overcast morning with rain tapering off. Mostly cloudy afternoon with scattered rain showers. Highs 50-57. Wind NE to N 10-20 MPH.

DAYS 6-10 (MAY 15-19)
Upper level low may kick off a few rain showers May 15 otherwise mainly dry but cool. A mainly fair and milder weather period May 16-19 but a front crossing the region sometime around May 17 may bring some cloudiness and passing rain showers.

DAYS 11-15 (MAY 20-24)
Slow progression of upper level systems should keep the region fair and on the warmer side to start the period with a wetter/cooler end to the period.

7:34AM

DAYS 1-5 (MAY 9-13)
High pressure hangs on today with dry weather, though not as sunny as yesterday. Low pressure tracks north of the region Friday and its warm front / cold front combo brings unsettled weather, but this moves right along and sets up a fairly nice weekend with great weather Saturday and fair weather holding on Sunday as high pressure forces the first of 2 low pressure areas south of the region. The second low will take advantage of departing high pressure to bring wet/cool weather Monday.
Forecast details…
TODAY: Partly sunny to mostly cloudy. Highs 58-65, cooling back along the coast. Wind light SE.
TONIGHT: Mostly cloudy. Lows 47-54. Wind SE 5-15 MPH.
FRIDAY: Mostly cloudy. Episodes of rain showers. Highs 52-59 coast, 60-67 interior. Wind SE 5-15 MPH shifting to S.
FRIDAY NIGHT: Mostly cloudy. Rain showers and possible thunderstorms evening, ending overnight west to east. Areas of fog. Lows 45-52. Wind W 5-15 MPH.
SATURDAY: Sun and passing clouds. Highs 59-66. Wind W 5-15 MPH and gusty.
SATURDAY NIGHT: Mostly clear. Lows 40-47. Wind light W.
SUNDAY: Variably cloudy. Highs 57-64. Wind light variable becoming SE.
SUNDAY NIGHT: Cloudy. Rain arriving overnight. Lows 41-48. Wind light E.
MONDAY: Overcast. Rain/drizzle likely. Highs 47-54. Wind N to NE 5-15 MPH.

DAYS 6-10 (MAY 14-18)
Low pressure departs slowly to east with upper level low pressure still around for somewhat unstable conditions and a chance of rain showers May 14 into May 15. Mostly dry weather in the May 16-18 period but a cold front may cross sometime late May 16 to May 17 with a few rain showers.

DAYS 11-15 (MAY 19-23)
I remain cautiously optimistic for a drier overall pattern and near to above normal temperatures.

6:58AM

DAYS 1-5 (MAY 8-12)
High pressure moves in today and hangs on well into Thursday with fair weather. Low pressure tracks north of the region Thursday night through Friday bringing a warm front / cold front combo and more unsettled weather. But that won’t be hanging around as another set-up similar to today/Thursday occurs over the weekend, leaving us with the question of how many dry hours we can hang onto for Mother’s Day as the next low pressure area approaches. This low will be further south than Friday’s and will threaten a more widespread rain, but may also be delayed in its arrival, saving most of the day from rain.
Forecast details…
TODAY: Mostly sunny except partly sunny South Coast. Highs 55-62 coast, 62-69 interior. Wind light variable with sea breezes.
TONIGHT: Mostly clear except partly cloudy South Coast. Lows 36-43 interior valleys, 43-50 elsewhere with mildest urban centers. Wind light variable.
THURSDAY: Sunshine followed by increasing cloudiness. Highs 58-65, cooling back along the coast. Wind light SE.
THURSDAY NIGHT: Cloudy. Rain likely north and west of Boston. Rain possible from Boston south. Lows 47-54. Wind SE 5-15 MPH.
FRIDAY: Cloudy. Rain showers likely. Highs 52-59 coast, 60-67 interior. Wind SE 5-15 MPH shifting to S.
FRIDAY NIGHT: Mostly cloudy. Rain showers ending west to east. Areas of fog. Lows 45-52. Wind W 5-15 MPH.
SATURDAY: Early clouds, then mostly sunny. Highs 57-64. Wind W 5-15 MPH and gusty.
SATURDAY NIGHT: Mostly clear. Lows 40-47. Wind light W.
SUNDAY: Increasing clouds. Chance of rain afternoon. Highs 58-65, coolest coast. Wind light variable to SE.

DAYS 6-10 (MAY 13-17)
A broad low pressure area brings wet weather May 13 followed by clearing May 14, then a smaller low pressure system brings a risk of rain showers later May 15 to early May 16. Additional low may have to be watched for May 17 but leaning toward drier at this time. Temperatures near normal overall.

DAYS 11-15 (MAY 18-22)
I am cautiously optimistic for a drier overall pattern and near to above normal temperatures. Still have low confidence this far in advance.

7:00AM

DAYS 1-5 (MAY 7-11)
Not making any significant forecast changes on this update. Quick warm day today but clouds move in and eventually a shower and potential thunderstorm threat as a cold front approaches, then passes through the region tonight. This sets up another nice but cooler day tomorrow. Broad low pressure approaches Thursday, which starts dry and ends wet, and makes Friday another wet day, but it is gone by the start of the weekend when another area of cool high pressure will move in.
Forecast details…
TODAY: Sun followed by clouds. Scattered rain showers and isolated thunderstorms northern and western areas by mid to late afternoon. Highs 55-62 Cape Cod, 63-70 other coastal areas, 70-77 interior. Wind SW 5-15 MPH.
TONIGHT: Mostly to partly cloudy. Scattered rain showers with a risk of thunder southern and eastern areas evening. Lows 50-57. Wind W 5-15 MPH shifting to NW.
WEDNESDAY: Mostly sunny except partly sunny South Coast. Highs 55-62 coast, 62-69 interior. Wind light variable with sea breezes.
WEDNESDAY NIGHT: Mostly clear except partly cloudy South Coast. Lows 36-43 interior valleys, 43-50 elsewhere with mildest urban centers. Wind light variable.
THURSDAY: Increasing cloudiness. Late-day rain west to east. Highs 58-65, cooling back along the coast. Wind light SE.
THURSDAY NIGHT: Cloudy. Rain likely. Lows 47-54. Wind SE 5-15 MPH.
FRIDAY: Cloudy. Periods of rain. Highs 48-55 coast, 55-62 interior. Wind SE 10-20 MPH.
FRIDAY NIGHT: Cloudy. Rain tapering off. Patchy fog and drizzle. Lows 43-50. Wind light variable.
SATURDAY: Early clouds, then mostly sunny. Highs 57-64. Wind W 10-20 MPH and gusty.

DAYS 6-10 (MAY 12-16)
High pressure brings fair weather May 12. Low pressure brings rain May 13. High pressure brings fair weather May 14. A system passing to the north sends clouds and a rain shower threat into the region May 15 into May 16 before clearing.

DAYS 11-15 (MAY 17-21)
The forecast remains low confidence, but one change I am starting to see is that low pressure may evolve away from the region and high pressure closer to this area bringing a greater chance of prolonged fair weather. Still have to figure this out.

6:37AM

DAYS 1-5 (MAY 6-10)
High pressure provides nice weather today and again Wednesday. The only slight interruption to the fair weather will be a cold front that drops through the region from northwest to southeast late Tuesday, which will be the warmest day of the next 5, but may also see a few late day and evening rain showers and a remote risk of thunder. But this also marks a longer period of time than we have seen in a while without being impacted by a low pressure system coming along the jet stream. However, the next system will arrive from the west later in the week. So we are not completely out of the active pattern yet but there will be a bit of a slowing down of the activity during this week.
Forecast details…
TODAY: Clouds give way to sun. Highs 63-70 except 56-63 coast, coolest Cape Cod. Wind N up to 10 MPH becoming variable with sea breezes.
TONIGHT: Mostly clear. Lows 45-52. Wind light W.
TUESDAY: Sun followed by clouds. Scattered rain showers and isolated thunderstorms northern and western areas by mid to late afternoon. Highs 55-62 Cape Cod, 63-70 other coastal areas, 70-77 interior. Wind SW 5-15 MPH.
TUESDAY NIGHT: Mostly to partly cloudy. Scattered rain showers southern and eastern areas evening. Lows 50-57. Wind W 5-15 MPH shifting to NW.
WEDNESDAY: Mostly sunny except partly sunny South Coast. Highs 55-62 coast, 62-69 interior. Wind light variable with sea breezes.
WEDNESDAY NIGHT: Mostly clear except partly cloudy South Coast. Lows 36-43 interior valleys, 43-50 elsewhere with mildest urban centers. Wind light variable.
THURSDAY: Increasing cloudiness. Late-day rain possible. Highs 58-65, cooling back along the coast. Wind light SE.
THURSDAY NIGHT: Cloudy. Rain likely. Lows 47-54. Wind SE 5-15 MPH.
FRIDAY: Cloudy. Periods of rain. Highs 48-55 coast, 55-62 interior. Wind SE 10-20 MPH.

DAYS 6-10 (MAY 11-15)
High pressure moves in for dry weather for the May 11-12 weekend. Low pressure brings a chance of wet weather for May 13 before fair and milder weather returns for the end of the period as high pressure retakes control of the weather.

DAYS 11-15 (MAY 16-20)
This is a low confidence forecast, but a broad low pressure area may result in several unsettled days during this period.

8:31AM

DAYS 1-5 (MAY 5-9)
Low pressure passes south of the region today, a wet day but wettest along and south of I-90, with lighter and more intermittent rain to the north. High pressure moves in for a nice Monday, then sinks to the south and allows a cold front from Canada to approach Tuesday, which may trigger some showers as it passes through during the afternoon and evening, although it will end up being the warmest day of this 5-day period. Another Canadian high moves in for midweek with more excellent weather. The next system will approach later Thursday, increasing the rain chances again, but we’re starting to see longer periods of time between jet stream disturbances as we enter pattern transition.
Forecast details…
TODAY: Cloudy. Periods of rain much of the day southern MA southward and a shorter period of rain favoring late morning to late afternoon northern MA and southern NH. Highs 55-62 except cooler coast. Wind E 5-15 MPH.
TONIGHT: Mostly cloudy with rain ending evening. Clearing overnight. Lows 45-52. Wind N 5-15 MPH.
MONDAY: Lingering clouds southern areas early, otherwise becoming mostly sunny. Highs 63-70 except 56-63 coast, coolest Cape Cod. Wind N up to 10 MPH becoming variable with sea breezes.
MONDAY NIGHT: Partly cloudy. Lows 45-52. Wind light W.
TUESDAY: Partly cloudy. Chance of rain showers southern NH and northern MA by mid to late afternoon. Highs 55-62 Cape Cod, 63-70 other coastal areas, 70-77 interior. Wind SW 5-15 MPH.
TUESDAY NIGHT: Mostly cloudy. Scattered rain showers ending from northwest to southeast. Lows 50-57. Wind W 5-15 MPH shifting to NW.
WEDNESDAY: Partly to mostly sunny. Highs 55-62 coast, 62-69 interior. Wind light variable with sea breezes.
WEDNESDAY NIGHT: Mostly clear. Lows 36-43 interior valleys, 43-50 elsewhere with mildest urban centers. Wind light variable.
THURSDAY: Increasing cloudiness. Highs 58-65, cooling back along the coast. Wind light SE.

DAYS 6-10 (MAY 10-14)
Wet weather threat from a jet stream disturbance May 10. A cold front may bring a few showers May 12 but much of the May 11-12 weekend looks dry. More fair weather for the end of the period with a warm-up possible by May 14.

DAYS 11-15 (MAY 15-19)
Still uncertainty here… The pattern evolution has several possibilities including a cut-off low somewhere nearby. Feeling however that this may occur further south or even well offshore and we end up in a continued progressive but slightly less active jet stream flow. Systems in this flow my bring showers early and again late in the period.