Heat and humidity return for the first half of the week, but the latter half will tell a different story.
Heat Advisories are in effect for the first half of the week. Image provided by the National Weather Service office in Norton, MA.
We start the week off with high pressure moving offshore, resulting in hot and humid conditions into Wednesday. Tuesday looks the be the hottest day of this stretch, with temperatures well into the 90s, and only a stray shower or thunderstorm providing minimal relief. Wednesday could also be quite hot, but we’ll have a cold front moving in, with clouds and a few showers and thunderstorms ahead of it during the afternoon. The front moves through and then stalls out near or just off the South Coast, which is where things get tricky.
It will feel like it is near or over 100 degrees Tuesday afternoon. Image provided by WeatherBell.
A wave of low pressure will ride along that front, bringing some rain and cooler air into the region. What’s uncertain is where the front stalls out, and the timing of the wave. For now, it looks like the bulk of the rain will be South of the Mass Pike, but that is highly uncertain. The rain could get all the way into southern New Hampshire, or it could be confined to the South Coast. This will be dependent om where the front actually is. How much rain will be dependent on how strong the wave is. Some models have light to moderate rain in spots, some show the potential for some hefty amounts. The other question is the timing. Some models show most of the rain Thursday and Thursday night, some have the heavier rain Thursday night into Friday, some even have it linger into Friday night. What you’ll see below is our best estimate on all these variables at this time, but it is obviously very low confidence. Behind the system high pressure builds in with cooler and drier weather for the weekend.
There’s a lot of uncertainty with the rainfall potential for the end of the week. Images provided by Pivotal Weather.
Monday: Patchy morning fog, otherwise mostly sunny, hot, and humid. High 85-92, cooler along the coast.
Monday night: Clear skies, a little patchy fog again. Low 65-72.
Tuesday: Sunshine and a few clouds, slight chance for an afternoon shower or thunderstorm. High 90-97, cooler across Cape Cod.
Tuesday night: Clear to partly cloudy. Low 66-73.
Wednesday: A mix of sun and clouds, chance for some late-day showers and thunderstorms. High 88-95, cooler across Cape Cod.
Wednesday night: Partly to mostly cloudy, showers and thunderstorms possible. Low 65-72.
Thursday: More clouds than sun with showers and thunderstorms likely. High 75-82.
Thursday night: Partly to mostly cloudy with more showers and thunderstorms. Low 58-65.
Friday: Showers and thunderstorms ending, becoming partly sunny. High 70-77.
Lots of changes coming up this weekend, but the humidity will probably hang around.
It will feel like it is near or over 100 degrees Friday afternoon. Image provided by WeatherBell.
High pressure settles offshore, keeping us on the warm and humid side. In fact, Friday will be downright hot with many places away from the South Coast getting into the 90s. When you factor the humidity it, it may feel like it is close to or a little over 100 in the afternoon. However, we’ll also see clouds moving in ahead of a cold front. That front will trigger some showers and thunderstorms during the afternoon and evening. We’re not expecting widespread severe weather, but some of the storms could produce gusty winds and heavy downpours. The front settles offshore before stalling out, with somewhat cooler and drier air moving in for Saturday. By somewhat, we mean temperatures in the 80s instead of 90s, and dewpoints in the upper 50s and lower 60s instead of upper 60s and lower 70s. So, it’ll be a typical summer day across the region. Sunday may not be as nice. A wave of low pressure will ride along the front and bring the humidity back in, along with the possibility some showers and thunderstorms, mostly during the afternoon and evening. However, some models keep the showers offshore, so we may end up with a decent day. High pressure returns for Monday with sunshine, warmer temperatures, and moderate humidity levels.
Will Sunday be wet or dry? It depends on which model you trust. Images provided by Pivotal Weather.
Thursday night: Clear skies. Low 66-73.
Friday: Some morning sun, then clouds move in with some showers and thunderstorms likely during the afternoon. High 88-95, cooler across the South Coast and Cape Cod.
Friday night: Showers and thunderstorms ending in the evening, becoming clear to partly cloudy after midnight. Low 63-70.
Saturday: A mix of sun and clouds. High 80-87, a little cooler near the coast.
Saturday night: Becoming partly to mostly cloudy. Low 60-67.
Sunday: More clouds than sunshine, showers and thunderstorms may develop in the afternoon. High 75-82.
Sunday night: Cloudy with any showers and thunderstorms ending during the evening, becoming partly cloudy late at night. Low 62-69.
Monday: Becoming mostly sunny. High 84-91, cooler across the South Coast and Cape Cod.
Quiet weather will dominate much of the upcoming work week.
It could get rather chilly tonight in some areas. Image provided by weathermodels.com
High pressure builds in for Monday and Tuesday with sunshine, low humidity and temperatures that are a little below normal for late July. Highs will only be in the 70s and lower 80s both days. With clear skies and diminishing winds tonight we could have ideal conditions for radiational cooling, resulting in low temperatures dropping into the 50s, with some 40s in the normally colder locations. As the high slides offshore on Wednesday temperatures will start to moderate, but the heat and humidity will really make a comeback for Thursday, and especially on Friday. Temperatures will get well into the 90s on Friday, but when the humidity is factored in it will feel like it is over 100 degrees in the afternoon. An approaching cold front may trigger some showers and thunderstorms Friday afternoon, but it looks like the front will stall out nearby and remain there for the weekend. That means it will remain humid with a daily chance for showers and thunderstorms. Temperatures will likely stay quite warm, but how hot it gets each day will depend on the amount of sunshine we see.
The heat index will be near or over 100 Friday afternoon. Image provided by WeatherBell,
Monday: Sunshine and a few clouds, breezy. High 73-80.
Monday night: Clear and cool. Low 51-58, a little warmer across Cape Cod.
Tuesday: Mostly sunny. High 72-79.
Tuesday night: Clear skies. Low 51-59.
Wednesday: Mostly sunny. High 78-85.
Wednesday night: Partly cloudy. Low 62-69.
Thursday: A mix of sun and clouds, breezy, more humid. High 86-93, cooler across the South Coast and Cape Cod.
Thursday night: Clear to partly cloudy. Low 67-74.
Friday: Sunshine with afternoon clouds, showers and thunderstorms possible late in the day, humid. High 91-98, cooler across the South Coast and Cape Cod.
Saturday: Partly sunny, chance for late-day showers and thunderstorms. High 83-90.
Sunday: Partly sunny, a few late-day showers and thunderstorms possible. High 79-86.
Cooler and drier weather is on the way, but there’s also more rain coming.
A cold front will bring in some showers and thunderstorms later today. Loop provided by Weathermodels.com
High pressure remains in control with hot and humid conditions lingering again today, but changes are on the way. A cold front will move in this evening, with some showers and thunderstorms likely ahead of it. While widespread severe weather is not expected, a few storms could produce strong winds, hail, and heavy downpours that could lead to flash flooding, especially across the interior. The front moves through at night, then drier air moves in for both Friday and Saturday as high pressure builds back in. Temperatures will be in the 70s and lower 80s, with dewpoints dropping into the 50s and lower 60s, making for a much more comfortable airmass. Unfortunately, it won’t last too long. By Saturday night, we’ll see clouds moving back in ahead of the next system, with humidity levels creeping back up. Another round of showers and thunderstorms will accompany this system, but for now, the day doesn’t look like a complete washout, with most of the activity likely coming during the morning. High pressure returns for later Sunday and Monday with cooler and drier air once again.
Dewpoints will drop into the 50s on Monday. Image provided by WeatherBell.
Thursday: Partly sunny, breezy, a few showers and thunderstorms likely late in the day. High 85-92.
Thursday night: Any showers or thunderstorms end in the evening, becoming clear to partly cloudy. Low 65-72.
Friday: Mostly sunny, less humid. High 77-84.
Friday night: Clear to partly cloudy. Low 55-62.
Saturday: Sunshine gives way to increasing high clouds. High 79-86.
Saturday night: Becoming mostly cloudy, showers and thunderstorms develop after midnight. Low 64-71.
Sunday: Showers and thunderstorms likely in the morning, becoming partly to mostly sunny in the afternoon. High 77-84.
Humidity remains in place for several more days this week, but the heat will also make a comeback.
Dewpoints will get well into the 70s by midweek. Image provided by weathermodels.com
High pressure remains off to our southeast today, with a trough of low pressure moving toward the region. The result will be southwest winds bringing very warm and humid air into the region. As the trough gets nearer, we’ll see some showers and thunderstorms moving in late in the day and into the evening hours. While there could be a few strong storms, the timing will likely be a little too late in the day for any widespread severe weather. However, any storms that do form will likely be fairly slow-moving, so they could dump a lot of rain in localized areas, which could result in some flash flooding in spots. Now this won’t be like what we’ve see in Texas recently, and it probably won’t be as bad as we say south of Boston this past Thursday morning, but it’s something to keep in mind if you’ll be out and about this evening.
Thunderstorms may cross the region late this afternoon and evening. Loop provided by weathermodels.com
Some of the showers could linger into Tuesday morning across parts of eastern and southeastern Massachusetts until the trough moves offshore, but once it does, humidity levels won’t drop much, if at all, and we set the stage for some hot weather to return. Once the sun breaks out on Tuesday, temperatures should get well into the 80s, with dewpoints in the 60s, resulting in a heat index likely reaching the lower 90s in many spots in the afternoon. The heat and humidity really return for Wednesday and Thursday, with many locations getting near or above 90 degrees, but with dewpoints creeping up even higher, the heat index may approach or exceed 100 each afternoon. A couple of widely scattered showers and thunderstorms may provide a little relief on Wednesday, with coverage or showers and storms expanding a bit more on Thursday. Again, some of these storms could be slow-moving, so localized flash flooding is possible.
The heat index will get well into the 90s Wednesday afternoon. Image provided by WeatherBell.
Friday is the day with the biggest question marks at this point. A cold front will be heading towards the region, with very warm and very humid air remaining in place ahead of it. The question is – how warm? Some models give us enough sunshine to allow temperatures to get near or above 90 once again, others have enough cloudcover to keep us in the 80s. As the front moves in, showers and thunderstorms are likely. The timing of the front and the amount of sunshine we get will help determine whether we can expect any severe weather or not. High pressure builds in with cooler and drier weather for Saturday. Another system could start to move in by later Sunday, but it also could hold off until Sunday night or Monday. We’ll have a better idea of what to expect from that when we get to our Weekend Outlook, which will be published on Wednesday this week instead of Thursday.
Will Sunday be wet or stay dry? It’s too early to tell. Images provided by Pivotal Weather.
We’re also keeping an eye on the tropics. An area of disturbed weather currently off the Southeast coast is expected to drift towards northern Florida over the next few days, bringing some heavy rain to parts of the Sunshine State. After that, it should continue westward and into the northeastern Gulf. Some models show the potential for the system to develop as it moves westward across the northern Gulf, others don’t do much with it. Water temperatures are plenty warm, so that won’t be a factor. This is something we’ll be keeping an eye on over the next several days.
There is a chance a system could develop in the northern Gulf later this week. Image provided by the National Hurricane Center.
Monday: Some low clouds and fog early, then becoming partly sunny, humid, showers and thunderstorms possible late in the day. High 80-87, a little cooler across the South Coast and Cape Cod.
Monday night: Any lingering showers or storms end in the evening, remaining partly to mostly cloudy with another shower or two and some patchy fog possible. Low 66-73.
Tuesday: Morning clouds, maybe a shower or two across southeastern Massachusetts, then becoming partly to mostly sunny, still humid. High 83-90, a little cooler across the South Coast and Cape Cod.
Tuesday night: Partly cloudy. Low 65-72.
Wednesday: A mix of sun and clouds, very humid, slight chance for a pop-up shower or thunderstorm during the afternoon. High 86-93, cooler across the South Coast and Cape Cod.
Wednesday night: Partly to mostly cloudy and muggy with some patchy fog. Low 68-75.
Thursday: Partly sunny and quite humid, some afternoon and evening showers and thunderstorms possible, breezy in the afternoon. High 84-91, a little cooler across the South Coast and Cape Cod.
Thursday night: Partly cloudy, muggy. Low 69-76.
Friday: Partly sunny and humid with showers and thunderstorms developing in the afternoon, ending in the evening. High 86-93.
Saturday: A mix of sun and clouds, not as humid. High 78-85.
Sunday: Intervals of clouds and sun, chance for late-day showers and thunderstorms. High 79-86.
Drier and warmer weather is expected as we head through much of the upcoming weekend.
High temperatures are generally in the lower to middle 80s around here in mid-July. Image provided by weathermodels.com
The last of the rain that brought flooding to the southern suburbs of Boston this morning will move offshore this evening, then high pressure builds in north of the area. This will result in drier weather for the next few days, with temperatures near or a little below normal, especially at the coast, thanks to onshore winds. There is still a chance for a few widely scattered pop-up showers and thunderstorms each afternoon, especially on Friday, but these will be confined to the interior, and the vast majority of the region won’t see any at all. Temperatures will rise a little on Monday as will humidity levels, making it a bit more uncomfortable than the previous few days. We’ll also see a cold front starting to approach on Monday, and this will give us a better chance for more widespread showers and thunderstorms during the afternoon and evening.
Showers and thunderstorms could be moving into the region later on Monday. Images provided by Pivotal Weather.
Thursday night: Any lingering showers end in the evening, mostly cloudy with areas of fog overnight. Low 59-66.
Friday: Morning clouds, then becoming partly sunny, slight chance for an afternoon shower or thunderstorm, mainly across the interior. High 78-85, a little cooler at the coast.
Friday night: Partly cloudy, patchy fog redevelops. Low 61-68.
Saturday: Partly sunny, a stray shower or thunderstorm possible across the interior during the afternoon. High 79-86, a little cooler at the coast.
Saturday night: Partly to mostly cloudy, more fog possible. Low 61-68.
Sunday: A mix of sun and clouds, just a very slight chance for a shower or thunderstorm. High 78-85, a little cooler across Cape Cod.
Sunday night: Partly to mostly cloudy. Low 61-68.
Monday: Intervals of clouds and sun, showers and thunderstorms may develop in the afternoon. High 79-86, a little cooler across Cape Cod.
Heat and humidity remain in place to start the week, but they won’t last too long.
The heat index will be in the lower to middle 90s again this afternoon. Image provided by WeatherBell.
High pressure sits offshore today while a cold front begins to approach from the west. That’s a recipe for hot and humid conditions across our region today. We could see a few showers and thunderstorms pop up during the afternoon, but they should not be widespread. Tuesday is the transition day, though it will be very warm to hot and quite humid once again. Across parts of southeastern Massachusetts and Cape Cod there is the potential for some heavy downpours early in the day as what’s left of Tropical Storm Chantal moves past the area. Later, that cold front will move across the region, resulting in more widespread showers and thunderstorms, a few of which could be strong to severe across the interior.
A few showers and storms are possible today, but they are more likely late Tuesday into Tuesday evening. Loop provided by Weathermodels.com
The front settles south of the region, but likely remains close enough for plenty of clouds on Wednesday with cooler temperatures and possibly a few showers as well. A wave of low pressure riding along the front brings in more showers for Thursday. For Friday, a few lingering showers are possible, but some drier air will start to move in as high pressure starts to build in across southeastern Canada. Saturday should be mostly dry, but with an upper level low pressure area moving through we’ll see some clouds and possibly a shower or two in the afternoon. High pressure should move offshore for Sunday with dry and warmer weather expected.
A few models show the potential for heavy rain near the South Coast Thursday, but many show nothing more than scattered showers. Images provided by Pivotal Weather.
Monday: Partly sunny, breezy, quite humid, chance for a few showers or thunderstorms. High 85-92, a little cooler across the South Coast and Cape Cod.
Monday night: Partly to mostly cloudy with areas of fog, some rain possible across southeastern Massachusetts and Cape Cod after midnight. Low 67-74.
Tuesday: A mix of sun and clouds, humid, showers and thunderstorms likely in the afternoon, a few could be strong. High 85-92, cooler across Cape Cod.
Tuesday night: Mostly cloudy, showers and storms taper off fog redevelops. Low 64-71.
Wednesday: Partly to mostly cloudy, a shower or two is possible, cooler. High 75-82.
Wednesday night: Plenty of clouds, some showers possible after midnight, mainly near the South Coast. Low 61-68.
Thursday: Mostly cloudy with scattered showers. High 74-81.
Thursday night: Cloudy with more showers. Low 60-67.
Friday: Mostly cloudy, a few more showers, mainly in the morning, some sunny breaks possible in the afternoon. High 72-79.
Saturday: Becoming partly sunny, slight chance for a pop-up shower. High 75-82.
Sunday: Intervals of clouds and sunshine. High 77-84.
Some fantastic weather is on the way for the holiday weekend.
Dewpoints will drop into the 50s for the Fourth of July. Image provided by WeatherBell.
A cold front will cross the region this evening, bringing an end to the heat and humidity, and taking any lingering showers and thunderstorms offshore. High pressure then builds in for the Fourth of July with sunshine and a few clouds, much lower humidity, and seasonably warm temperatures. You won’t have any weather-related issues for outdoor activities during the day or at night. Saturday will be similar, perhaps a few degrees warmer, and maybe a touch more humid, but still very comfortable. For Sunday and Monday, the high will start to move offshore, so both temperatures and humidity will start to creep up, with temperatures above 90 in many areas.
Heat and humidity return on Sunday. Image provided by weathermodels.com
A cold front will also be starting to approach on Monday, so we’ll see clouds starting to move in, but it looks like any shower or thunderstorm activity associated with the front should hold off during the daylight hours. However, that’s not the only thing we’re keeping an eye on for Monday. There’s a cluster of showers and thunderstorms currently sitting off the Southeast coast along a decaying front. Forecast models show the potential for a little development this weekend and given NHC’s track record so far this year, it wouldn’t be a surprise it they decided to call it a Tropical Depression or even a Tropical Storm. It will bring some heavy rain and gusty winds to parts of the Carolinas this weekend before either dissipating or heading out to sea well south of New England. However, some of the moisture from that storm will move up the East Coast. If it does, it will interact with the aforementioned cold front coming through here on Tuesday, but some models show the potential for it to get up here as soon as Monday afternoon or evening. We’re not convinced that will be the case just yet, but we’re not ruling it out either. We’ll have more on that in our Weekly Outlook early Monday morning, and potentially in a special blog post this weekend if the system does develop.
Will a system to the south send in some rain late Monday? It’s a possibility. Images provided by Pivotal Weather.
Thursday night: Any lingering showers or thunderstorms end in the evening, clearing overnight. Low 58-65.
Friday: Sunshine and a few clouds, much less humid. High 76-83.
Friday night: Clear during the evening, becoming partly cloudy late at night. Low 54-61.
Saturday: A mix of sun and clouds. High 79-86.
Saturday night: Partly cloudy. Low 62-69.
Sunday: Partly to mostly sunny, breezy in the afternoon, becoming humid. High 87-94, cooler along the South Coast and across Cape Cod.
Sunday night: Clear to partly cloudy. Low 66-73.
Monday: A mix of sun and clouds, breezy, chance for a late-day shower or thunderstorm, humid. High 88-95, cooler along the South Coast and across Cape Cod.
As we reach the halfway point of the year, we also have Canada Day and Independence Day this week, so whichever you celebrate, enjoy as we’ll have some typical summertime weather for much of the upcoming week.
Canada and the United States will both be celebrating birthdays this week.
We start the week off with high pressure offshore resulting in a very warm to hot day today with increasing humidity levels as winds shift into the southwest. Tuesday looks like another warm and very humid day with dewpoints getting well into the 70s, but with an approaching cold front, we’ll see clouds and probably two rounds of showers and thunderstorms. The first batch likely moves through during the morning hours, but it’s the second batch that we’re keeping an eye on. The potential exists for some of the storms to become strong to severe, but that will depend on several factors. If we can get any sunshine after the first batch of storms, it will help to destabilize the atmosphere, whereas if it stays cloudy and thus cooler, the cold front will just produce some showers with only a few rumbles of thunder. We are expecting some sunshine to develop, so the other important factor is the timing of the front. A front that arrives late afternoon, during the maximum heating of the day will be more likely to produce severe weather than a front that arrives during the evening, when we are past the max heating of the day. Any storms that do form could produce heavy downpours and strong winds.
We’re looking at two rounds of thunderstorms on Tuesday. Loop provided by Weathermodels.com
Behind the front, high pressure builds back in with drier and more seasonable conditions for Wednesday and Thursday as highs will be mainly in the 80s, with dewpoints dropping into the 50s and lower 60s. Another disturbance may trigger a few showers and thunderstorms late Thursday, but high pressure returns for the Fourth of July and into Saturday with some spectacular summer weather, which shouldn’t cause any problems for any outdoor holiday celebrations. Another system could move in for Sunday, but that’s far from certain at this point.
Right now the weather for the Fourth looks picture perfect. Image provided by WeatherBell.
Monday: Some morning fog, otherwise partly to mostly sunny, humid. High 84-91, cooler along the coast and across Cape Cod.
Monday night: Becoming partly to mostly cloudy with fog redeveloping, especially along the coast. Some showers and thunderstorms are possible towards daybreak. Low 63-70.
Tuesday: Some showers and thunderstorms possible early, then intervals of clouds and sunshine, showers and thunderstorms may redevelop late in the day, breezy, very humid. High 82-89, cooler across the South Coast and Cape Cod.
Tuesday night: Showers and thunderstorms ending, some clearing after midnight. Low 64-71.
Wednesday: Becoming mostly sunny, less humid. High 81-88.
Wednesday night: Clear skies. Low 61-68.
Thursday: Sunshine and some afternoon clouds, chance for a late-day shower or thunderstorm. High 83-90, cooler across Cape Cod.
Thursday night: Chance for a shower or thunderstorm in the evening, otherwise becoming clear to partly cloudy. Low 59-66.
Friday: Mostly sunny, drier. High 76-83.
Saturday: A mix of sun and clouds. High 79-86.
Sunday: Partly sunny, more humid, breezy, chance for a few showers or thunderstorms. High 86-93, cooler across Cape Cod.
The heat and humidity are gone, with cool and damp weather return, the hot and humid weather could make a return by the end of the weekend.
Temperatures are 20-30 degrees colder this afternoon than they were at this time yesterday. Image provided by Weathermodels.com
The front that ended the heat wave moved through yesterday and has settled offshore, with high pressure building in to the north. This has shifted winds into the east and northeast, bringing much cooler air in, and it will hang around into Friday. As disturbances ride along the front, we’ll have episodes of showers into Saturday, though the vast majority of the time will remain dry. As the high slides offshore, winds will start to shift into south and southwest on Saturday, allowing temperatures to warm into the 70s in many areas, especially south of the Mass Pike, though we’ll still have plenty of clouds and a few showers, especially north of the Mass Pike, but dewpoints will climb back into the 60s, perhaps even lower 70s across the region. We should see a little more in the way of sunshine on Sunday, allowing temperatures to get back into the 80s in many areas. By Monday, the very warm and humid weather will return, with highs well into the 80s and dewpoints in the 60s and lower 70s across much of the region resulting in another moderately uncomfortable day.
Most (but not all) of the models show drier weather moving in Saturday afternoon. Images provided by Pivotal Weather,
Thursday night: Plenty of clouds with a few showers possible. Low 56-63.
Friday: Intervals of clouds and sunshine, slight chance for a shower. High 66-73.
Friday night: Mostly cloudy with some showers likely. Low 55-62.
Saturday: Mostly cloudy with a chance for more showers, mainly in the morning. High 73-80 south of the Mass Pike, 65-72 north of the Pike.
Saturday night: More clouds with a few more showers possible. Low 60-67.
Sunday: Becoming partly sunny. High 75-82.
Sunday night: Partly cloudy. Low 58-66.
Monday: A mix of sun and clouds. High 81-88, cooler across Cape Cod.
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