Sunday May 31 2020 Forecast

8:10AM

DAYS 1-5 (MAY 31-JUNE 4)

We’ve reached the end of May, and the month is ending on a very dry, breezy and fairly bright note, though today’s sunshine will have to share the sky with passing fair weather clouds, at least for a portion of the day. Still, a very nice way to end the month of May after an early season bout of warmth combined with humidity. The forecast heading into the early days of June remains pretty much as it was on yesterday’s update, including a disturbance crossing the region with a shower threat and even cooler air Monday, a warm front approaching later Tuesday and passing through at night with some wet weather, a warmer Wednesday with a shower or thunderstorm threat as a cold front moves through later in the day, and a return to cooler air once again for Thursday. Additional note: Last night, sky watchers in eastern MA, southeastern NH, RI, and eastern CT were treated to an overhead pass of the International Space Station, and 45 seconds later a pass of the Crew Dragon space capsule, which was launched Saturday afternoon from Florida. The 2 will dock this morning and together will make a visible pass across the sky of southeastern New England just after 9PM this evening, from northwest to southeast (9:04-9:08PM). The sky will be clear for this!

TODAY: Sun and passing clouds. Highs 68-75. Wind NW 10-20 MPH.

TONIGHT: Clear. Lows 40-47. Wind NW 5-15 MPH.

MONDAY: Variably cloudy. Risk of showers. Highs 61-68. Wind N 10-20 MPH.

MONDAY NIGHT: Clearing. Lows 45-52. Wind N 5-15 MPH.

TUESDAY: Sunshine then increasing clouds late. Highs 63-70. Wind variable 5-15 MPH.

TUESDAY NIGHT: Mostly cloudy. Risk of rain. Lows 53-60. Wind S up to 10 MPH.

WEDNESDAY: Mostly cloudy with a risk of showers early morning, then partly sunny. Risk of a late-day shower or thunderstorm. More humid. Highs 72-77. Wind SW 5-15 MPH.

WEDNESDAY NIGHT: Partly cloudy. Risk of a shower early. Lows 53-60. Wind NW 5-15 MPH.

THURSDAY: Partly cloudy. Highs 67-74. Wind NW 5-15 MPH.

DAYS 6-10 (JUNE 5-9)

Warm front approaches and brings clouds back with a rain threat at some point June 5. Warm sector June 6, warmer and more humid, risk of a shower or thunderstorm. Frontal boundary hanging in the area makes for a tricky temperature forecast and allows for at least lots of cloudiness and perhaps some scattered rainfall in the June 7-8 time frame before it dries out at the end of the period.

DAYS 11-15 (JUNE 10-14)

Leaning toward slightly cooler than average and drier than average during this 5-day period.

Saturday May 30 2020 Forecast

9:37AM

DAYS 1-5 (MAY 30-JUNE 3)

It’s transition day! Today, a cold front crossing the region will bring an end to the early-season warm/muggy episode and introduce a much drier air mass from Canada, but it’s a slow process taking most of the day today to occur. With the front not completely across the region yet, we still run the risk of a few showers and even a brief thunderstorm popping up through about early afternoon. Most areas will likely escape the activity, but if a line should get itself together the coverage, while brief, could be more widespread for a portion of southeastern New England. But odds are against this, so if you have outdoor plans, go about them and just keep an eye on the sky. Tonight, a secondary trough will push through the region from west to east with some clouds at times, but most shower activity that fires up during the day in NY State should not make it much further than the Berkshires or Connecticut River Valley before dissipating. What you will definitely feel tonight is cooler and much drier air. And this dry air will be in place for Sunday, along with a gusty breeze, sunshine and passing clouds, as high pressure moves across the Great Lakes and toward the Ohio Valley. The position of this high and the upper level air flow will allow a disturbance coming out of southern Canada to cross New England on Monday, introducing more cloudiness, a possible passing shower or two, and even cooler air. But this fast-flow pattern means quick changes and by Tuesday we’ll already be seeing the next disturbance approach by later in the day, after a mainly dry day, clouds return and a risk of some insignificant wet weather at night, putting us into a warmer and slightly more humid sector of air for Wednesday with mainly dry weather – just a minimal shower threat.

TODAY: Variably cloudy. Slight risk of passing showers and possibly a brief thunderstorm favoring areas west of I-95 morning and I-95 eastward midday to early afternoon. Decreasing humidity. Highs 76-83, cooler South Coast especially Cape Cod. Wind SW shifting to NW 5-15 MPH, higher gusts.

TONIGHT: Partly cloudy. Lows 53-60. Wind NW 5-15 MPH.

SUNDAY: Partly cloudy. Highs 68-75. Wind NW 10-20 MPH.

SUNDAY NIGHT: Clear. Lows 50-57. Wind NW 5-15 MPH.

MONDAY: Variably cloudy. Risk of showers. Highs 61-68. Wind N 10-20 MPH.

MONDAY NIGHT: Clearing. Lows 45-52. Wind N 5-15 MPH.

TUESDAY: Sunshine then increasing clouds late. Highs 63-70. Wind variable 5-15 MPH.

TUESDAY NIGHT: Mostly cloudy. Risk of rain. Lows 53-60. Wind S up to 10 MPH.

WEDNESDAY: Partly sunny. Slight risk of a shower. More humid. Highs 72-77. Wind SW 5-15 MPH.

DAYS 6-10 (JUNE 4-8)

A passing shower otherwise mainly dry and cooler June 4 as a cold front moves through. Warm front approaches and brings clouds back with a rain threat at some point June 5. Warm sector June 6, warmer and more humid, risk of a shower or thunderstorm. Frontal boundary hanging in the area makes for a tricky temperature forecast and allows for at least lots of cloudiness and perhaps some scattered rainfall in the June 7-8 time frame.

DAYS 11-15 (JUNE 9-13)

Leaning toward slightly cooler than average and drier than average during this 5-day period.

Friday May 29 2020 Forecast

7:43AM

DAYS 1-5 (MAY 29-JUNE 2)

A southerly air flow will continue to bring warm and humid weather to the region today and tonight. Some fog and drizzle will be around the South Coast early in the day. A plume of tropical moisture will bring a few downpours to Nantucket first thing this morning otherwise just look for scattered light showers and sprinkles today. Some sun will try to develop, especially north of I-90, where temperatures will climb highest today due to cloud breaks and distance from the South Coast, where a southerly wind is coming off cooler water. A cold front will make its way across the region west to east during the first 12 to 15 hours of Saturday, triggering a few showers and possible thunderstorms. We’ll have to monitor for where a possible line or cluster of showers/storms may form during the late morning and midday hours of Saturday as we gain some daytime heating. Most likely chance for this is near the I-95 belt eastward. Either way, this interruption will be temporary and by later Saturday and definitely Saturday night, we’ll be clearing out and drying out, setting up for a fantastic weather day on Sunday as high pressure moves in. You may or may not recall, the last time June 1 and 2 fell on a Monday / Tuesday, we had anomalous cold, with Boston failing to reach 50 (high temp of 49) both days. This came along with rain/drizzle and a chilly northeast wind. Is that about to happen again? No. But the same 2 days falling on the same 2 days of the week this time around will once again be significantly cooler than average, just not to the extreme of last time, and this time with drier air, courtesy an air mass that originated near the North Pole. It may come along with some rain showers Monday as a disturbance crosses the region, but Tuesday will be a dry day, though we may see some cloudiness arriving as it starts to warm up aloft.

TODAY: Low clouds / fog / drizzle near South Coast and a few showers / downpours near Nantucket early morning, otherwise mostly cloudy to partly sunny with isolated light showers. Humid. Highs 70-77 south of I-90, 78-85 I-90 northward. Wind SW-S 10-20 MPH, higher gusts.

TONIGHT: Mostly cloudy. Patchy fog. Chance of showers and possibly a thunderstorm, mainly after midnight. Humid. Lows 60-67. Wind SW 5-15 MPH.

SATURDAY: Mostly cloudy to partly sunny. Scattered showers, possibly a thunderstorm, favoring morning and midday hours west of I-95, midday to mid afternoon I-95 eastward. Gradually lowering humidity. Highs 76-83, cooler South Coast especially Cape Cod. Wind SW shifting to NW 5-15 MPH, higher gusts.

SATURDAY NIGHT: Clearing. Lows 55-62. Wind W 5-15 MPH.

SUNDAY: Mostly sunny. Highs 70-77. Wind NW 5-15 MPH.

SUNDAY NIGHT: Clear. Lows 50-57. Wind NW 5-15 MPH.

MONDAY: Variably cloudy. Risk of showers. Highs 61-68. Wind N 10-20 MPH.

MONDAY NIGHT: Clearing. Lows 45-52. Wind N 5-15 MPH.

TUESDAY: Sunshine then increasing clouds late. Highs 63-70. Wind NW 5-15 MPH.

DAYS 6-10 (JUNE 3-7)

The overall pattern during this 5-day period will feature a west to northwest air flow across the Northeast with a couple disturbances bringing episodes of wet weather, but staying rain-free most of the time. Temperatures below normal.

DAYS 11-15 (JUNE 8-12)

Not looking for a significant change in the pattern of the previous 5-day period.

Thursday May 28 2020 Forecast

7:22AM

DAYS 1-5 (MAY 28-JUNE 1)

A southerly air flow will bring warm and increasingly humid weather to our region through Friday night, and with little to trigger them, showers will be limited through the daylight hours of Friday, after which an approaching cold front from the west will increase the risk of showers, and possibly some thunderstorms, though that particular threat does not look too significant. It will take a good part of Saturday for the front to completely make it through the region, so that will be an unsettled day, not likely raining the entire time but with a chance of shower activity at any time. Clearing will occur Saturday night and high pressure will move in for a stellar end to May on Sunday. But waiting in the wings is a very cool air mass from Canada, which will make the first day of June on Monday feel more like a day earlier in May. This will probably come with a passing disturbance that will bring at least clouds and possibly a few showers.

TODAY: Partly sunny. More humid. Highs 80-87 except 73-80 South Coast, coolest Cape Cod. Wind S 5-15 MPH.

TONIGHT: Mostly cloudy. Isolated to scattered showers. Humid. Lows 60-67. Wind SW 5-15 MPH.

FRIDAY: Mostly cloudy. Isolated to scattered showers. Humid. Highs 73-80 except 66-73 South Coast. Wind S 10-20 MPH.

FRIDAY NIGHT: Mostly cloudy. Patchy fog. Chance of showers and possibly a thunderstorm. Lows 60-67. Wind SW 5-15 MPH.

SATURDAY: Mostly cloudy. Scattered showers, possibly a thunderstorm, favoring morning and midday hours. Gradually lowering humidity. Highs 70-77, cooler South Coast especially Cape Cod. Wind SW shifting to NW 5-15 MPH, higher gusts.

SATURDAY NIGHT: Clearing. Lows 55-62. Wind W 5-15 MPH.

SUNDAY: Mostly sunny. Highs 70-77. Wind NW 5-15 MPH.

SUNDAY NIGHT: Clear. Lows 50-57. Wind NW 5-15 MPH.

MONDAY: Variably cloudy. Risk of showers. Highs 65-72. Wind N 10-20 MPH.

DAYS 6-10 (JUNE 2-6)

The overall pattern during this 5-day period will feature a west to northwest air flow across the Northeast with a couple disturbances bringing episodes of wet weather, but staying rain-free most of the time. Temperatures below normal.

DAYS 11-15 (JUNE 7-11)

Not looking for a significant change in the pattern of the previous 5-day period.

Wednesday May 27 2020 Forecast

7:21AM

DAYS 1-5 (MAY 27-31)

The evolution of weather changes due to the position of high pressure continues, and today will be the warmest day of the stretch for many areas, along with lots of sun. But wait, you woke up early this morning and it was cloudy over Cape Ann and in most areas south of the I-90 (Mass Pike)! Yes, that lingering marine layer of air responsible from the low clouds at times since Sunday night. That will be gone in a matter of a couple hours as the sun burns it off. Yesterday, the predominant wind direction, while not strong, was from the southeast, keeping all coastal areas significantly cooler than inland locations. Today, the wind direction will be southwesterly, and that allows east-facing coastal areas to warm up as well, while south-facing and the limited west-facing shores (outer Cape Cod, for example), still are cooled by air passing over water first. You know the drill by now, right? Onward we go and we’ll see increasing moisture starting tonight in the form of cloudiness, which will be dominant both Thursday and Friday, as the air flow becomes a little more straight southerly. A shower threat will exist both Thursday night and Friday, but this early in the season a southerly wind limits thunderstorm chances without stronger additional dynamics, and I think any thunderstorm threat on Friday is now minimal unless you are well inland and near hilly terrain, and there are enough breaks of sunshine to help cook up stronger showers that could build enough. Something to watch. But we’ll also have a slower-moving cold front, which will not likely pass through the region until Saturday morning. The lack of lift on Friday from this feature will also limit thunderstorm chances, but the slower movement of the front will keep shower chances going into at least a portion of Saturday before improvement ensues. High pressure will move in for a stellar Sunday to end the month of May.

TODAY: Early low clouds/fog Cape Ann and mostly south of I-90, otherwise mostly sunny. Highs 81-88 except 73-80 South Coast with coolest over Cape Cod. Wind SW 5-15 MPH.

TONIGHT: Increasing clouds. Patchy fog interior lower elevations. Lows 56-63. Wind SW up to 10 MPH.

THURSDAY: Mostly cloudy. More humid. Highs 77-84 except 69-74 South Coast with coolest over Cape Cod. Wind S 5-15 MPH.

THURSDAY NIGHT: Mostly cloudy. Risk of a showers. Humid. Lows 60-67. Wind SW 5-15 MPH.

FRIDAY: Mostly cloudy. Chance of showers and a slight risk of thunderstorms. Humid. Highs 73-80 except 66-73 South Coast. Wind S 10-20 MPH.

FRIDAY NIGHT: Mostly cloudy. Patchy fog. Chance of showers and possibly a thunderstorm. Lows 60-67. Wind SW 5-15 MPH.

SATURDAY: Mostly cloudy. Scattered showers, possibly a thunderstorm, favoring morning and midday hours. Gradually lowering humidity. Highs 68-75. Wind SW shifting to NW 5-15 MPH, higher gusts.

SATURDAY NIGHT: Clearing. Lows 55-62. Wind W 5-15 MPH.

SUNDAY: Mostly sunny. Highs 70-77. Wind NW 5-15 MPH.

DAYS 6-10 (JUNE 1-5)

For several days now I’ve been eyeing a turn back to cooler weather for early June. This will take place as we see a bit of a blocking pattern and an anomalous cool upper level and surface pattern evolve, first with a dry cold front passing by June 1 and then low pressure forming and doing a loop offshore by June 2 helping to pull the initial shot of cool air into the region. We’ll have to watch that offshore low for its position, because sometimes these things can migrate far enough west to bring at least cloudiness and possibly wet weather to this area but for now thinking it stays mostly offshore and just serves as a driver of cool air. The behavior of that feature will impact the timing of what comes after, but based on current expected occurrences thinking that we get briefly fair and milder weather June 3 then some unsettled weather and a renewed push of cool air for June 4-5. Probably some adjustment will be needed for details.

DAYS 11-15 (JUNE 6-10)

Overall pattern continues to look cooler and drier than average but at least one threat of showers/thunderstorms should occur.