Thursday June 24 2021 Forecast (7:33AM)

36 Comments

DAYS 1-5 (JUNE 24-28)

High pressure sits over the region today with another very pleasant weather day. Yesterday’s crisp northwesterly breeze will be replaced by lighter morning and midday winds and a developing coastal sea breeze, then a more general southeasterly breeze later in the day as the high pressure area starts to move offshore. Weather changes are coming though. A warm front will traverse the region from south to north during Friday and Friday night with lots of clouds and a few showers passing through the region, and the first of many days with higher humidity and warmer to hotter weather will occur Saturday, continuing through the weekend and on into the start of next week, as the main feature in control of our weather will be high pressure both at the surface and aloft anchored off the US East Coast – typical summer pattern. There will be a frontal boundary to the west and north of New England, but through this period at least, it will be held from making any progress into our region, and after Friday’s warm advection shower chance, the only chance of rainfall in the days following would be from isolated air mass showers and thunderstorms, but the chance of those isn’t even that high.

TODAY: Sunny through mid afternoon. Patchy clouds later in the day. Highs 76-83, coolest coast. Dew point rising slightly to lower 50s. Wind variable up to 10 MPH with coastal sea breezes developing through early afternoon, then SE 5-15 MPH with a few higher gusts late in the day.

TONIGHT: Partly cloudy. Lows 56-63. Dew point holding in lower 50s. Wind SE 5-15 MPH.

FRIDAY: Mostly cloudy. A few passing shower possible. Highs 75-82, cooler in some coastal locations. Dew point rising toward 60. Wind E 5-15 MPH.

FRIDAY NIGHT: Mostly cloudy. Chance of showers. Fog patches forming. Lows 61-68. Dew point lower 60s. Wind S up to 10 MPH.

SATURDAY: Partly to mostly sunny. Highs 83-90, cooler South Coast / Cape Cod. Dew point in the 60s. Wind SW 5-15 MPH.

SATURDAY NIGHT: Partly cloudy. Patchy fog interior lower elevations. Lows 65-72, warmest urban areas. Dew point lower to middle 60s. Wind SW up to 10 MPH.

SUNDAY: Mostly sunny to partly cloudy. Slight chance of a late-day shower or thunderstorm mainly hilly terrain far west and northwest of Boston. Highs 85-92. Dew point middle 60s. Wind SW 5-15 MPH.

SUNDAY NIGHT: Partly cloudy. Patches of fog forming interior lower elevations. Lows 65-72. Dew point middle to upper 60s. Wind SW under 10 MPH.

MONDAY: Partly sunny. Slight chance of isolated afternoon showers or thunderstorms. Highs 85-92. Dew point upper 60s. Wind SW 5-15 MPH.

DAYS 6-10 (JUNE 29 – JULY 3)

Latest trend is for high pressure offshore to hold a cold front back to the west and north of the region that will only gradually make its way in with the help of a couple disturbances moving along a weakened jet stream to the north. The basic result is minimal risk of any afternoon showers and t-storms early and late in the period with a slightly better chance mid period. Temperatures should run generally above normal.

DAYS 11-15 (JULY 4-8)

A weak or washed out frontal boundary hangs around early in the period and dissipates with minimal chances for showers/thunderstorms with warm and at least moderately humid conditions. A stronger disturbance may approach mid to late period with an increased chance for showers/thunderstorms. Temperatures near to above normal.

36 thoughts on “Thursday June 24 2021 Forecast (7:33AM)”

  1. Thanks Tk . I just hope with all of this nice weather we can get a fabulous 4th 3 day weekend of beach weather , fireworks , cookouts etc . Especially after that horrible Memorial Day weekend we had .

    2. Makes sense. They are on the eastern side of a trough.

      It’s a bit early for this but higher dew point temps are common there during monsoon season in the Southwest.

      1. Right, but isn’t that usually late July into August?
        That’s what I had thought anyway. thanks

        1. The Monsoon season in the Southwest runs from mid-July through mid-September.

          BTW, it’s not really a monsoon, at least not by the meteorological definition, but then again, we’ve seen plenty of things lately that are called one thing when the definition says it’s not, like “Tropical Storm Claudette”

          1. Dave: Yes, this is not associated with the seasonal “monsoon”. That comes later. This pattern is just one that allowed a bit more moisture into that region than we may typically see most of the time at this point in the season.

            SAK: correct .. I always wondered why they called it the Southwest Monsoon. Even Pete & Dave did, so I just went with it. But it’s not like the Indian Monsoon.

    1. You know that is very much not necessarily the case.

      I already see hints of a refreshing air mass out of Canada before the single digits of July are done.

      1. Hope that varifies. Then the next question, how long does that last before HHH returns? 24 hours? 48 hours?

        1. I think that’s something that we can figure out when we get close to that time frame. Just because we’ve had a few instances of heat so far does not necessarily mean this is the summer pattern.

          In fact, I’m not betting on it long term.

    1. Eric hasn’t been paying attention obviously, as the guidance has actually been trending cooler out there today.

      Truth be told, it’s been fluctuating wildly based on which model and which run, but overall, the trend has been a bit cooler.

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