9:10AM

DAYS 1-5 (AUGUST 17-21)
The transition from a relatively cool marine layer of air to a mid summer feeling hot humid air mass will take place this weekend, with the result being more cloudiness than we’ve seen in the last couple days but still very limited rainfall, non-existent in most locations. Heat peaks on Monday, a day with no shower or storm threat as the upper atmosphere warms too much, then the heat comes down a tiny bit heading toward midweek but the storm chances increase as the upper atmosphere cools and a front approaches from the northwest.
Forecast details…
TODAY: Mostly cloudy to partly sunny. Isolated afternoon showers and a slight chance of thunderstorms, favoring central MA and southwestern NH. Humid. Highs 77-84, coolest coast. Wind SE 5-15 MPH except variable under 10 MPH well inland.
TONIGHT: Partly to mostly cloudy. A late-night shower or thunderstorm possible southwestern NH and central MA. Patchy fog. Humid. Lows 62-69. Wind light S.
SUNDAY: Mostly cloudy to partly sunny. Isolated afternoon showers and thunderstorms. Humid. Highs 80-87. Wind S up to 10 MPH.
SUNDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
MONDAY: Partly cloudy. Humid. Highs 87-94. Wind SW 5-15 MPH.
MONDAY NIGHT: Partly cloudy. Humid. Lows 65-72. Wind light SW.
TUESDAY: Partly sunny. Isolated afternoon thunderstorms. Humid. Highs 87-94. Wind SW 5-15 MPH.
TUESDAY NIGHT: Partly cloudy. Humid. Lows 66-73. Wind light SW.
WEDNESDAY: Partly sunny. Scattered to numerous afternoon thunderstorms. Humid. Highs 84-91. Wind SW 10-20 MPH

DAYS 6-10 (AUGUST 22-26)
A cold front will pass through the region early August 22 with a morning shower/thunderstorm then a drying trend and a shot of cooler/drier air that will last through early August 24. After that, high pressure slides offshore and a late summer warm-up occurs, returning temperatures to above normal with higher humidity but dry weather August 25-26.

DAYS 11-15 (AUGUST 27-31)
High pressure off the Atlantic Coast will keep it warm to hot and humid and keep most shower/thunderstorm activity north and west of the region the couple days of the period. The last few days of the month will continue warm/humid but with an increasing shower/storm risk as a boundary to the west and north gets closer in response to weaker high pressure offshore.

6:57AM

DAYS 1-5 (AUGUST 16-20)
High pressure to the northeast of the region continues to cause a broad but weak onshore flow into Saturday, keeping heat at bay but allowing humidity to increase as Atlantic moisture is drawn into the region, as evident this morning by low clouds and areas of fog and patchy drizzle. This will burn away today but the moisture may allow for a few pop up showers over interior hilly locations. This process repeats again tonight / Saturday. By Sunday, a more southerly flow will result in warmer temperatures, more humidity still, and a slightly better risk for showers and a possible thunderstorm popping up, although throughout the weekend the region will be largely rain-free. Monday-Tuesday will see a return to the feel of mid summer heat as high pressure grabs some of the heat from the southern US and propels it into New England, giving the area its first widespread 90+ temperatures since July. Thunderstorm chances will be pretty much non-existent Monday and limited due to it being rather warm aloft, keeping the atmosphere more stable.
Forecast details…
TODAY: Mostly cloudy to partly sunny. Areas of fog morning. Isolated afternoon pop-up showers interior hills. Highs 75-82. Wind variable, mostly E to SE, up to 10 MPH.
TONIGHT: Partly to mostly cloudy cloudy. Areas of fog. Lows 60-67. Wind light E to SE.
SATURDAY: Partly cloudy. Isolated afternoon showers, favoring interior hills. More humid. Highs 78-85. Wind SE 5-15 MPH.
SATURDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
SUNDAY: Partly sunny. Isolated afternoon showers and thunderstorms. Humid. Highs 80-87. Wind S up to 10 MPH.
SUNDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
MONDAY: Partly cloudy. Humid. Highs 87-94. Wind SW 5-15 MPH.
MONDAY NIGHT: Partly cloudy. Humid. Lows 65-72. Wind light SW.
TUESDAY: Partly sunny. Isolated afternoon thunderstorms. Humid. Highs 87-94. Wind SW 5-15 MPH.

DAYS 6-10 (AUGUST 21-25)
The timing of a cold front approaching will determine how hot it gets on August 21 and when a chance of more widespread showers and thunderstorms occurs (between later August 21 and early August 22). A shot of cooler/drier air briefly follows during August 22 and the August 23-24 weekend looks rain-free with a warm-up as high pressure dominates. By the end of the period, the heat/humidity returns as high pressure slides offshore.

DAYS 11-15 (AUGUST 26-30)
Indications are for stronger high pressure off the Atlantic Coast for the late days of August, resulting in above normal temperatures, humid conditions, and a few opportunities for showers/thunderstorms.

7:15AM

DAYS 1-5 (AUGUST 15-19)
Quick update for today’s blog, just to say no major changes from what I said yesterday, other than just making a few minor tweaks. We will run relatively minor shower risks the next several days, and we may struggle to burn some of the clouds off on Friday and Saturday as marine moisture invades the lower atmosphere due to high pressure centered to the north and east of the region bringing more marine air in. By the end of this period, it will feel more like mid summer again.
Forecast details…
TODAY: Partly sunny. Areas of fog early. A brief pop-up shower possible southwestern NH afternoon. A passing shower possible outer Cape Cod / Islands too.
Highs 73-80. Wind E to SE up to 10 MPH.
TONIGHT: Partly to mostly cloudy. Areas of fog. Lows 55-62. Wind light SE.
FRIDAY: Mostly cloudy to partly sunny. Areas of fog morning. Passing light showers possible Cape Cod / Islands and a slight risk of an afternoon pop-up shower interior hills. Highs 75-82. Wind variable, mostly E to SE, up to 10 MPH.
FRIDAY NIGHT: Partly to mostly cloudy cloudy. Patchy fog. Lows 60-67. Wind light E to SE.
SATURDAY: Partly cloudy. Isolated afternoon showers and thunderstorms, favoring interior hills. More humid. Highs 78-85. Wind E to SE 5-15 MPH.
SATURDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
SUNDAY: Partly sunny. Isolated afternoon showers and thunderstorms. Humid. Highs 80-87. Wind S up to 10 MPH.
SUNDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
MONDAY: Partly cloudy. Humid. Highs 85-92. Wind SW 5-15 MPH.

DAYS 6-10 (AUGUST 20-24)
Jet stream remains weak and lifts to the north with temperatures sliding to the warmer side of normal, a some late summer heat/humidity, and limited shower/thunderstorm threats.

DAYS 11-15 (AUGUST 25-29)
Very warm and humid pattern with increasing risk for shower/thunderstorms as a weak west to east flow continues but the jet stream sinks back to the south.

7:25AM

COMMENTARY
Just a quick comment on forecasting and its media maze. Limited air time, too many platforms to update, and in some cases just plain poor forecasting made many folks believe that a widespread moderate to heavy rain event was expected yesterday. It wasn’t. This blog, and other sources, tried the best they could to highlight that heaviest rainfall would be limited to certain areas, and that many areas would largely miss out. As it turned out, it was even more limited, area-wise, than I indicated in the discussion posted on yesterday’s blog, with Nantucket really being the only place that saw impactful rain over several hours, while other areas near the South Coast were wet for several hours then dried out, and the band from the north had fairly weak legs and its impact was confined mostly to parts of southern NH and far northeastern MA. I really wish that instead of sunny, nearly seasonable days being “top story” worthy for news casts, they could find a way to give more time to weather when it is NEEDED, even if it’s just to explain a situation better. If that happened, the majority of the population would stop walking around misinformed about the weather for the day. Wishful thinking? It seems so in regards to most media platforms at this point.

DAYS 1-5 (AUGUST 14-18)
Now if I told you there are shower threats the next 5 days, you’d probably think to yourself “rainy pattern” or “wet pattern”, and that would be a fair conclusion to reach if the information given stopped there, but this is why I write this discussion. We will be, in fact, in a fairly dry pattern during these 5 days. That weak westerly flow that was mentioned for mid August back so many days ago on a previous blog will be taking place, and weak disturbances helping to interact with more local effects (sea breezes mainly) will come along to help produce those shower threats, but they will be minor, rather isolated, temporary, and the result will be that most of our area will be dry during this stretch, with weak high pressure more often in control and producing rain-free conditions than we see disturbances interacting with sea breeze boundaries and helping showers to pop up. Nevertheless, afternoons from Thursday through Sunday will be when we’ll need to watch for such pop up activity. Please do not cancel any outdoor plans if you see rain drops slathered across your app.
Forecast details…
TODAY: Variably cloudy. A brief very light shower possible north central MA and southwestern NH this morning. Highs 73-80. Wind N to NE 5-15 MPH, a few higher gusts along the coast.
TONIGHT: Partly cloudy. Lows 55-62. Wind light NE to E.
THURSDAY: Partly sunny. A brief pop-up shower possible southwestern NH afternoon. A passing shower possible outer Cape Cod / Islands too.
Highs 73-80. Wind E to SE up to 10 MPH.
THURSDAY NIGHT: Partly cloudy. Lows 55-62. Wind light SE.
FRIDAY: Partly sunny. Passing light showers possible Cape Cod / Islands and a slight risk of an afternoon pop-up shower interior hills.
Highs 75-82. Wind variable, mostly SE, up to 10 MPH.
FRIDAY NIGHT: Partly cloudy. Patchy fog. Lows 60-67. Wind light variable.
SATURDAY: Partly cloudy. Isolated afternoon showers. More humid. Highs 78-85. Wind variable 5-15 MPH.
SATURDAY NIGHT: Partly cloudy. Patchy fog. Humid. Lows 62-69. Wind light S.
SUNDAY: Partly sunny. Isolated afternoon showers. Humid. Highs 80-87. Wind S up to 10 MPH.

DAYS 6-10 (AUGUST 19-23)
Jet stream remains weak and lifts to the north with temperatures sliding to the warmer side of normal, a some late summer heat/humidity, and limited shower/thunderstorm threats.

DAYS 11-15 (AUGUST 24-28)
A warm to hot late summer pattern with moderate to high humidity, and a few opportunities for thunderstorms, as high pressure ridging and a northward-displaced jet stream is the pattern for New England to start out, and then the jet stream wanders back to the south as a weak trough moves into the Great Lakes / Northeast, increasing the risk for showers/thunderstorms later in the period.

7:26AM

DAYS 1-5 (AUGUST 13-17)
A cold front sinks southward across the region today and sets up shop to the south by midweek. Our unsettled day will be today as an increasing chance of showers/thunderstorms results. There are likely to be 2 main bands that see them, one with the front itself dropping down from northern New England, with a broken band of activity from southern NH into northern MA this afternoon and/or early evening, and waves of activity closer to the South Coast. The main threat today will be road flooding and poor visibility in downpours, which may occur over the same areas for a while due to the set-up / movement of activity. Primary time for impact will be mid afternoon to early evening. Although severe weather (in terms of fitting severe thunderstorm criteria) is not expected, there is a slight risk of one or two strong storms. Enough southward push of high pressure should occur for mainly dry weather and below average temperatures during Wednesday and Thursday, although we will have to watch another wave of low pressure passing to the south during Thursday. High pressure will be centered north and east of New England late this week and that may set-up a boundary between onshore flow from coastal areas and light southerly air flow further away. This can sometime trigger pop up showers, and this may occur either or both days, but not enough to cancel plans over.
Forecast details…
TODAY: Partial sun this morning otherwise mostly cloudy. Increasing chance of showers/thunderstorms, favoring southern NH to northern MA and areas closer to the South Coast. Locally heavy rainfall possible. More humid. Highs 75-82. Wind SW up to 10 MPH.
TONIGHT: Mostly cloudy. Lingering showers in southern areas. Slightly less humid. Lows 58-65. Wind SW up to 10 MPH shifting to N.
WEDNESDAY: Mostly sunny to partly cloudy southern NH and northern MA, partly sunny to mostly cloudy southern MA southward. Highs 73-80. Wind N to NE up to 10 MPH.
WEDNESDAY NIGHT: Partly cloudy. Lows 55-62. Wind light E.
THURSDAY: Variably cloudy. Slight chance of showers, favoring far southern areas. Highs 73-80. Wind E to SE up to 10 MPH.
THURSDAY NIGHT: Variably cloudy. Chance of a shower southeastern areas early. Lows 55-62. Wind light variable.
FRIDAY: Partly sunny. Isolated afternoon showers. Highs 75-82. Wind variable up to 10 MPH.
FRIDAY NIGHT: Partly cloudy. Patchy fog. Lows 60-67. Wind light variable.
SATURDAY: Partly cloudy. Isolated afternoon showers. Highs 78-85. Wind variable 5-15 MPH.

DAYS 6-10 (AUGUST 18-22)
High pressure holds most of the control but a boundary may still trigger a pop up shower southern and western areas afternoon August 18. Gradual build in heat/humidity August 19-22 with occasional risks of pop up shower/thunderstorm activity.

DAYS 11-15 (AUGUST 23-27)
A warm to hot late summer pattern with moderate to high humidity, and a few opportunities for thunderstorms, as high pressure ridging and a northward-displaced jet stream is the pattern for New England late this month.

7:20AM

DAYS 1-5 (AUGUST 12-16)
High pressure drifts to the south of New England today allowing a warm-up and a slight increase in humidity, that will become more pronounced tonight into Tuesday as a cold front heads toward and eventually passes through the region. During this time the shower threat will increase and by Tuesday midday and afternoon some heavy shower activity is possible, favoring areas closer to the South Coast. This front will push a little further south and as a bubble of high pressure tries to build in from the north Wednesday we’ll be drier, but cloudiness may linger in southern areas while clearing is more confined to northern locations. Another wave of low pressure will ride along the front to the south of the region Thursday, bringing additional cloudiness and a shower threat again favoring southern locations. High pressure will begin to build in Friday but a little lingering trough and chilly air aloft will allow some pop up showers to develops.
Forecast details…
TODAY: Sunshine starts dominant then becomes limited. Becoming moderately humid. Highs 80-87. Wind W up to 10 MPH.
TONIGHT: Mostly cloudy. Scattered showers and a slight risk of a thunderstorm. Humid. Lows 62-69. Wind SW up to 10 MPH.
TUESDAY: Mostly cloudy. Scattered to numerous showers/thunderstorms with some heavy rainfall possible. Humid. Highs 75-82. Wind SW up to 10 MPH.
TUESDAY NIGHT: Mostly cloudy. Lingering showers in southern areas. Slightly less humid. Lows 58-65. Wind SW up to 10 MPH shifting to N.
WEDNESDAY: Mostly sunny to partly cloudy southern NH and northern MA, partly sunny to mostly cloudy southern MA southward. Highs 73-80. Wind N to NE up to 10 MPH.
WEDNESDAY NIGHT: Partly cloudy. Lows 55-62. Wind light E.
THURSDAY: Mostly cloudy. Chance of showers, favoring southern areas. Highs 73-80. Wind E to SE up to 10 MPH.
THURSDAY NIGHT: Variably cloudy. Chance of a shower southeastern areas early. Lows 55-62. Wind light variable.
FRIDAY: Partly sunny. Isolated afternoon showers. Highs 75-82. Wind NW 5-15 MPH.

DAYS 6-10 (AUGUST 17-21)
High pressure will dominate the August 17-18 weekend with generally fair weather and low to moderate humidity, and only the slightest risk of a pop up shower near sea breeze boundaries near the eastern coastal areas August 17 and southern coastal areas August 18. A gradual build in heat/humidity is expected during the August 19-21 period with a slight risk of isolated showers and thunderstorms.

DAYS 11-15 (AUGUST 22-26)
Classic summer – warm to hot, moderate to high humidity, a few opportunities for thunderstorms, as high pressure ridging and a northward-displaced jet stream is the pattern for New England late this month.

6:56AM

DAYS 1-5 (AUGUST 11-15)
High pressure controls today’s weather which will be pleasant and dry for August. The high sinks to the south and allows the humidity to up-tweak on Monday while fair weather remains in place. Low pressure tracks across the region from the west Tuesday and its exact track determines whether we see general showers or at least southern areas also see the threat of some heavier thunderstorms. Just 10 or 20 miles will make a difference, so this forecast will have to be fine-tuned up to the last moment. Right now, a little cautious optimism for drier and cooler air working in behind this departing system Wednesday before a follow-up low tracks just to the south of the region Thursday, putting another fine-line forecast between sun/clouds/wet weather over the region, greater chance of drier north and wetter south from this vantage point 5 days away.
Forecast details…
TODAY: Sunny. Highs 77-84, coolest coast. Wind light variable with sea breezes.
TONIGHT: Clear. Lows 55-62. Wind light SW.
MONDAY: Partly sunny. Highs 80-87. Wind SW 5-15 MPH.
MONDAY NIGHT: Variably cloudy. Humid. Lows 60-67. Wind light SW.
TUESDAY: Mostly cloudy. Showers likely. Chance of thunderstorms. Humid. Highs 78-85. Wind S 5-15 MPH.
TUESDAY NIGHT: Mostly cloudy. Chance of showers. Humid. Lows 61-68. Wind light variable.
WEDNESDAY: Partly sunny. Less humid. Highs 73-80. Wind light N to NE.
WEDNESDAY NIGHT: Partly cloudy. Lows 55-62. Wind light NE to E.
THURSDAY: Variably cloudy – most sun north / most clouds south. Chance of showers south. Highs 75-82. Wind light E to SE.

DAYS 6-10 (AUGUST 16-20)
High pressure builds into the region with fair weather and a warming trend August 16-17, then a couple minor jet stream disturbances from the west bring a couple opportunities for showers/thunderstorms August 18-20 in a warm and more humid overall pattern.

DAYS 11-15 (AUGUST 21-25)
Look for weak west to east flow, jet stream to the north, warm to hot and on the humid side with a couple shower/thunderstorm threats heading into late August.

8:14AM

DAYS 1-5 (AUGUST 10-14)
A trough swings through the region today and may kick off a brief afternoon shower in some locations, but that would be a very minor interruption in what will otherwise be a great August weekend. When we get to Monday, the humidity will start to increase, though the weather will be fair, then a broad trough moving in from the west will bring shower and thunderstorm chances for Tuesday into Wednesday.
Forecast details…
TODAY: Sunny to partly cloudy. Brief passing shower possible west to east during the afternoon. Highs 77-84, coolest hills. Wind W 5-15 MPH.
TONIGHT: Mostly clear. Lows 53-60. Wind light NW.
SUNDAY: Sunny. Highs 77-84, coolest coast. Wind light variable with sea breezes.
SUNDAY NIGHT: Clear. Lows 55-62. Wind light SW.
MONDAY: Partly sunny. Highs 80-87. Wind SW 5-15 MPH.
MONDAY NIGHT: Variably cloudy. Humid. Lows 60-67. Wind light SW.
TUESDAY: Mostly cloudy. Chance of showers and possible thunderstorms. Humid. Highs 78-85. Wind S 5-15 MPH.
TUESDAY NIGHT: Mostly cloudy. Chance of showers. Humid. Lows 61-68. Wind light variable.
WEDNESDAY: Mostly cloudy. Chance of showers. Humid. Highs 73-80. Wind light variable.

DAYS 6-10 (AUGUST 15-19)
Trough departs and high pressure builds in with fair and dry weather returning August 15. High pressure should maintain control overall with a warm-up August 16-17, then a trough from the west may bring showers/thunderstorms during the August 18-19 time frame.

DAYS 11-15 (AUGUST 20-24)
Overall pattern will be weak west to east flow with a northward-displaced jet stream, allowing more heat/humidity back into the region. Can’t rule out a few opportunities for showers/thunderstorms, but much of this period looks rain-free.

7:34AM

DAYS 1-5 (AUGUST 9-13)
2 minor changes for this update. Removing the pop-up shower/storm from today’s forecast and adding it for a brief time window to Saturday, as it doesn’t look like we have enough instability to trigger anything today and a small but vigorous trough will pass by during the first half of Saturday afternoon, possibly triggering a shower to interrupt a few outdoor plans briefly. Many areas will not see anything, however, and we pretty much have a 3-day stretch of great weather starting today. Nice weather will probably carry through most of if not all of Monday (leaning toward the latter) as high pressure sinks to the south of the region. By Tuesday, a trough from the west approaches and we enter the next period of unsettled weather with an increased risk for shower activity, more clouds, and more humidity.
Forecast details…
TODAY: Mostly sunny to partly cloudy. Highs 78-85. Wind W 5-15 MPH, few higher gusts.
TONIGHT: Mostly clear. Lows 55-62. Wind W up to 10 MPH.
SATURDAY: Partly cloudy. Brief passing shower possible west to east midday to mid afternoon. Highs 77-84, coolest hills. Wind W 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 53-60. Wind light NW.
SUNDAY: Sunny. Highs 77-84, coolest coast. Wind light variable with sea breezes.
SUNDAY NIGHT: Clear. Lows 55-62. Wind light SW.
MONDAY: Partly sunny. Highs 80-87. Wind SW 5-15 MPH.
MONDAY NIGHT: Variably cloudy. Humid. Lows 60-67. Wind light SW.
TUESDAY: Mostly cloudy. Chance of showers. Humid. Highs 78-85. Wind S 5-15 MPH.

DAYS 6-10 (AUGUST 14-18)
A low pressure area crosses the region August 14 with showery conditions. High pressure builds in with fair and dry weather August 15. High pressure should maintain control overall with a warm-up August 16-17, then a trough from the west may bring showers/thunderstorms by the end of the period.

DAYS 11-15 (AUGUST 19-23)
Overall pattern will be weak west to east flow with a northward-displaced jet stream, allowing more heat/humidity back into the region. Can’t rule out a few opportunities for showers/thunderstorms, but much of this period looks rain-free.

7:20AM

DAYS 1-5 (AUGUST 8-12)
Humidity comes down a peg today, but doesn’t really crash until a cold front crosses the region in the early hours of Friday. An initial trough responsible for lots of rain (for many areas) and lots of lightning (for some areas) during last night is offshore but with humidity in place and still one more front to approach and pass through, we can’t rule out a few more showers/storms today, although they will be much more isolated. By Friday, we start a 3 day stretch of comfortable weather, with the only rain threat being the possibility of an isolated pop up shower or thunderstorm on Friday as we combine still warm surface air with colder air aloft and pop instability clouds. Weekend weather? About as nice as you can get in August, although the nights will be on the cool side and may cause you to think of autumn. Monday’s weather also looks nice but we should see a quick warm-up and a bit of a humidity increase as well as high pressure sinks south.
Forecast details…
TODAY: Partly sunny. Isolated to scattered showers/thunderstorms. Moderately humid. Highs 80-87. Wind SW 5-15 MPH.
TONIGHT: Partly cloudy. Less humid. Lows 60-67. Wind shifting to W 5-15 MPH.
FRIDAY: Partly cloudy. Isolated afternoon showers/thunderstorms. Highs 78-85. Wind NW 10-20 MPH.
FRIDAY NIGHT: Partly cloudy. Lows 55-62. Wind NW 5-15 MPH.
SATURDAY: Sunny to partly cloudy. Highs 77-84, coolest interior hills. Wind NW 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 53-60. Wind light NW.
SUNDAY: Sunny. Highs 77-84, coolest coast. Wind light variable with sea breezes.
SUNDAY NIGHT: Clear. Lows 55-62. Wind light SW.
MONDAY: Partly sunny. Highs 80-87. Wind SW 5-15 MPH.

DAYS 6-10 (AUGUST 13-17)
A broad trough of low pressure helps the jet stream sink south and brings higher humidity and showery weather August 13-14, before high pressure builds back in with drier and pleasant weather August 15-17, starting a little cooler then turning somewhat warmer.

DAYS 11-15 (AUGUST 18-22)
Drier pattern expected as the jet stream lifts to the north and high pressure builds into the eastern US, but look for increasing heat and humidity during this period. Shower/thunderstorm risk should be minimal for much of this period.

7:15AM

DAYS 1-5 (AUGUST 7-11)
Humidity spikes today and Thursday, but without high heat, however it will feel hot today as sunshine will work on the humidity for a while before we pop isolated thunderstorms the first half of the afternoon, then more clustered storm activity favoring areas west of Boston the second half of the afternoon which will progress eastward tonight. The focus for severe storms starts out to the west and eventually ends up in southeastern MA during tonight. Severe storms would be most likely to produce damaging wind gusts, which includes brief tornadoes. The main activity should be pretty much done by early Thursday but with the cold front still to the west we can still see additional storms pop up on Thursday, although the support will be a little less and the storm numbers should be down. The cold front gets through the region Thursday night at which time the humidity level takes a dive, and we stay rather warm but much drier Friday, when the combination of ground heating and cooler air coming in aloft may allow an isolated shower or thunderstorm to pop up on what otherwise will be a dry day for most. Weekend? Excellent! Dry weather, low humidity, warm days, cool nights.
Forecast details…
TODAY: Variably cloudy. Areas of fog early. Isolated showers/thunderstorms early to mid afternoon anywhere. Scattered to numerous showers/thunderstorms favoring central and northeastern MA and southern NH with isolated showers/storms possible elsewhere mid afternoon on. Any storms may be strong to locally severe. Humid. Highs 81-88. Wind SW 5-15 MPH, higher gusts.
TONIGHT: Mostly cloudy. Showers/thunderstorms likely, with isolated severe storms possible. Areas of fog. Humid. Lows 63-70. Wind SW 5-15 MPH, but strong gusts possible near any storms.
THURSDAY: Partly sunny. Isolated to scattered showers/thunderstorms until about mid afternoon. Humid. Highs 80-87. Wind SW 5-15 MPH.
THURSDAY NIGHT: Partly cloudy. Less humid. Lows 60-67. Wind shifting to W 5-15 MPH.
FRIDAY: Partly cloudy. Isolated afternoon showers/thunderstorms. Highs 78-85. Wind NW 10-20 MPH.
FRIDAY NIGHT: Partly cloudy. Lows 55-62. Wind NW 5-15 MPH.
SATURDAY: Sunny to partly cloudy. Highs 77-84, coolest interior hills. Wind NW 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 53-60. Wind light NW.
SUNDAY: Sunny. Highs 77-84, coolest coast. Wind light variable with sea breezes.

DAYS 6-10 (AUGUST 12-16)
High pressure settles to the south with increasing warmth and humidity August 12-13, dry August 12, risk of showers/storms later August 13. Trough moves through with showers/storms August 14, high humidity but cooler air. Drier, more seasonable weather for the end of the period as high pressure builds in behind the departing trough.

DAYS 11-15 (AUGUST 17-21)
Dry pattern expected as the jet stream lifts to the north and high pressure builds into the eastern US, but look for increasing heat and humidity with time.

7:08AM

DAYS 1-5 (AUGUST 6-10)
A warm front crosses the region today, parented from a low pressure area in east central Canada. A separate low will be tracking south of New England and may toss a few showers close to the South Coast especially the islands off Cape Cod. Otherwise, look for a mainly rain-free day but an increase in humidity today, and then a spike in humidity at midweek as a cold front approaches. The timing of this front is such that most of the shower/thunderstorm activity will occur to the west during the day Wednesday, moving into the region later Wednesday night into Thursday before pushing off to the east. Although some strong storms are possible, this timing should spare the region severe storms. Refreshing dry air will arrive later in the week, but a few instability showers/storms may pop up due to colder air aloft and a still fairly warm surface on Friday. By Saturday, expect dry weather across the region.
Forecast details…
TODAY: Areas of fog early to mid morning. Variably cloudy. Isolated showers South Coast. More humid. Highs 80-87. Wind S to SW 5-15 MPH.
TONIGHT: Variably cloudy. Humid. Lows 62-69. Wind SW 5-15 MPH.
WEDNESDAY: Variably cloudy. Scattered afternoon showers/thunderstorms, favoring areas west of a Boston-Providence line. Humid. Highs 81-88. Wind SW 10-20 MPH.
WEDNESDAY NIGHT: Variably cloudy. Increasing risk of showers/thunderstorms west to east. Patchy fog. Humid. Lows 63-70. Wind SW 5-15 MPH.
THURSDAY: Variably cloudy. Scattered showers/thunderstorms likely, favoring morning and early afternoon. Humid. Highs 80-87. Wind SW 5-15 MPH shifting to W.
THURSDAY NIGHT: Partly cloudy. Less humid. Lows 60-67. Wind W 5-15 MPH.
FRIDAY: Partly cloudy. Isolated afternoon showers/thunderstorms. Highs 78-85. Wind NW 10-20 MPH.
FRIDAY NIGHT: Partly cloudy. Lows 53-60. Wind NW 5-15 MPH.
SATURDAY: Sunny to partly cloudy. Highs 77-84. Wind NW 5-15 MPH.

DAYS 6-10 (AUGUST 11-15)
Pleasant/dry August 11 as high pressure dominates. High pressure pushes to the south with fair weather and a warm-up August 12. More humid with a shower/thunderstorm risk August 13-14 as trough crosses the region from west to east. High pressure and fair weather return at the end of the period.

DAYS 11-15 (AUGUST 16-20)
Dry pattern expected as the jet stream lifts to the north and high pressure builds into the eastern US, but look for increasing heat and humidity with time.

7:01AM

DAYS 1-5 (AUGUST 5-9)
High pressure builds in today bringing the best weather of the next 5 days, sunshine, seasonably warm air, and low humidity. But things change in a hurry as a warm front moves across the region from southwest to northeast early Tuesday, re-introducing higher humidity to the region, which will stick around (pun intended) into Thursday until a cold front moves across the region. Shower and thunderstorm chances will exist later Tuesday, returning Wednesday, favoring areas to the west, and Thursday, favoring all areas. Whether or not any severe storms occur remains to be seen, and something we’ll fine-tune in the next few updates. By Friday, that cold front will have moved offshore and we’ll be back into drier air, but some chilly air aloft will make the atmosphere unstable and we’ll have to watch for pop up showers and thunderstorms that day.
Forecast details…
TODAY: Mostly sunny. Highs 79-86, coolest coast. Wind light variable with light coastal sea breezes.
TONIGHT: Partly cloudy. Lows 60-67. Wind S under 10 MPH.
TUESDAY: Variably cloudy. Mid to late afternoon shower or thunderstorm possible. More humid. Highs 80-87. Wind S to SW 5-15 MPH.
TUESDAY NIGHT: Variably cloudy. Humid. Lows 62-69. Wind SW 5-15 MPH.
WEDNESDAY: Partly sunny. Scattered afternoon showers/thunderstorms, favoring areas west of a Boston-Providence line. Humid. Highs 81-88. Wind SW 10-20 MPH.
WEDNESDAY NIGHT: Variably cloudy. Risk of a shower or thunderstorm. Patchy fog. Humid. Lows 63-70. Wind SW up to 10 MPH.
THURSDAY: Variably cloudy. Scattered showers/thunderstorms likely. Humid. Highs 80-87. Wind SW 5-15 MPH.
THURSDAY NIGHT: Partly cloudy. Risk of a shower or thunderstorm early. Patchy fog evening. Less humid. Lows 60-67. Wind W 5-15 MPH.
FRIDAY: Partly cloudy. Isolated afternoon showers/thunderstorms. Highs 78-85. Wind NW 10-20 MPH.

DAYS 6-10 (AUGUST 10-14)
The August 10-11 weekend looks dry and comfortable with temperatures averaging slightly below normal – a slight hint of fall days ahead. Warming back up the first half of the following week August 12-14 with fair weather to start then an increasing risk of shower/t-storms as the jet stream dips and a broad trough of low pressure moves into the Northeast.

DAYS 11-15 (AUGUST 15-19)
Fair, drier and cooler weather returns the first couple days of this period followed by increasing heat/humidity later in the period as the jet stream lifts to the north and high pressure ridging builds into the eastern US.

7:48AM

DAYS 1-5 (AUGUST 4-8)
A low pressure trough near the South Coast may trigger a few pop up showers/storms there today, otherwise it’s fair and drying elsewhere. High pressure will bring beautiful weather Monday, then a long-advertised period of more unsettled weather arrives Tuesday to Thursday. Expecting there to be several opportunities for showers and thunderstorms, with the day that is of most concern for stronger storms being Wednesday. There will be much fine-tuning to do in future blog updates.
Forecast details…
TODAY: Mostly sunny to partly cloudy. Isolated showers and thunderstorms possible late morning southeastern MA, RI, and adjacent eastern CT. Highs 79-86. Wind NW up to 10 MPH.
TONIGHT: Mostly clear. Lows 58-65. Wind light N.
MONDAY: Mostly sunny. Highs 78-85, coolest coast. Wind light variable with light coastal sea breezes.
MONDAY NIGHT: Mostly clear. Lows 55-62. Wind light variable.
TUESDAY: Increasing cloudiness. Chance of showers late-day. Highs 77-84, coolest coast. Wind light SE.
TUESDAY NIGHT: Mostly cloudy. Chance of showers. More humid. Lows 62-69. Wind S 5-15 MPH.
WEDNESDAY: Variably cloudy. Showers/thunderstorms likely. Humid. Highs 78-85. Wind SW 10-20 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Showers/thunderstorms likely. Humid. Lows 63-70. Wind SW 5-15 MPH.
THURSDAY: Variably cloudy. Chance of showers and possible thunderstorms. Less humid. Highs 76-84. Wind W 5-15 MPH.

DAYS 6-10 (AUGUST 9-13)
August 9 may see a few additional showers and thunderstorms as a broad low pressure trough moves through the region. The August 10-11 weekend looks dry overall but some cool air aloft may trigger a few instability showers, and it may end up a little cooler than average. Possible quick warm-up to end the period as high pressure builds offshore, pushes the trough out, and a southerly air flow develops.

DAYS 11-15 (AUGUST 14-18)
With high pressure ridging strongest over the US Plains and Midwest, this allows more troughing to drop through the Great Lakes and Northeast and another one will likely do that the first half of this period with a few shower/thunderstorm episodes and no major heat. Drier/warmer weather later in the period as the trough lifts out and high pressure builds in.

9:28AM

DAYS 1-5 (AUGUST 3-7)
A trough of low pressure will move across southeastern New England slowly today through Sunday. It will have cleared most of the region by Sunday morning hanging up around the South Coast for a while during Sunday. This trough may trigger a few showers and thunderstorms favoring areas from the Boston-Providence corridor northwestward today and this evening, and to the southeast of the B-P line on Sunday. It’ll be a warm weekend, but not too hot. Humidity starts out a bit higher today then drops off during Sunday as drier air arrives from Canada. This sets up a splendid Monday as high pressure builds in, then we get more unsettled in the Tuesday-Wednesday period as first a warm front crosses the region with cloudiness and a shower threat, then a cold front brings showers and thunderstorms during Wednesday. We’ll have to keep a close eye on the Wednesday activity, while it’s at day 5 and uncertain, we may have to deal with some strong storms. Forecast details…
TODAY: Variably cloudy. Scattered showers north and west of Boston this morning. Isolated showers/thunderstorms, favoring southern NH, northern and central MA, eastern CT, and northwestern RI this afternoon. Moderately humid. Highs 78-83 coast, 83-88 interior. Wind SW up to 10 MPH except coastal sea breezes.
TONIGHT: Partly cloudy. Isolated showers/thunderstorms possible very early. Moderately humid. Lows 62-69. Wind light SW to W.
SUNDAY: Partly cloudy southern RI and southeastern MA with isolated showers and thunderstorms possible. Mostly sunny elsewhere. Less humid. Highs 79-86. Wind NW up to 10 MPH.
SUNDAY NIGHT: Mostly clear. Lows 58-65. Wind light N.
MONDAY: Mostly sunny. Highs 78-85, coolest coast. Wind light variable with light coastal sea breezes.
MONDAY NIGHT: Mostly clear. Lows 55-62. Wind light variable.
TUESDAY: Increasing cloudiness. Chance of showers late-day. Highs 77-84, coolest coast. Wind light SE.
TUESDAY NIGHT: Mostly cloudy. Chance of showers. More humid. Lows 62-69. Wind S 5-15 MPH.
WEDNESDAY: Variably cloudy. Showers/thunderstorms likely. Humid. Highs 78-85. Wind SW 10-20 MPH.

DAYS 6-10 (AUGUST 8-12)
August 8-9 may see a few additional showers and thunderstorms as a broad low pressure trough moves through the region. The August 10-11 weekend looks dry overall but some cool air aloft may trigger a few instability showers, and it may end up a little cooler than average. Possible quick warm-up to end the period as high pressure builds offshore, pushes the trough out, and a southerly air flow develops.

DAYS 11-15 (AUGUST 13-17)
With high pressure ridging strongest over the US Plains and Midwest, this allows more troughing to drop through the Great Lakes and Northeast and another one will likely do that the first half of this period with a few shower/thunderstorm episodes and no major heat. Drier/warmer weather later in the period as the trough lifts out and high pressure builds in.