Tuesday August 3 2021 Forecast (8:22AM)

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DAYS 1-5 (AUGUST 3-7)

We sit on the drier side of a boundary which will be drifting north and west over the coming days as high pressure starts to gain more anchor off the US East Coast, although this entire process will be quite slow. A large shield of cloudiness will fan up across the region today to the north and west of this boundary due to more humid air riding up over the drier air we have at the surface. Eventually these clouds will thicken and lower and we’ll have our greatest chance of showery weather from later Wednesday into Thursday as a wave of low pressure moves by on the boundary as it gets closer and moves into southeastern New England. Right now it appears that rainfall will be most concentrated and heaviest over Cape Cod and Nantucket – the places that actually need it as they had missed out on a large percentage of July’s rainfall and sit in abnormally dry to moderate drought conditions. The boundary washes out and dissipates over our region Friday and Saturday as high pressure continues to become more established off the East Coast, resulting in a warming trend, increased humidity, but not oppressive, and rain chances limited to only a few diurnal showers or thunderstorms far inland later Saturday.

TODAY: Increasing clouds. Highs 76-83, coolest coastal areas. Dew points ranging from near 50 interior MA to the lower 60s South Coast but will rise slowly especially interior MA through the 50s to near 60 by the end of the day. Wind variable to S up to 10 MPH.

TONIGHT: Mostly cloudy. Lows 61-68. Dew point near 60. Wind S under 10 MPH.

WEDNESDAY: Mostly cloudy. Showers developing south to north in the afternoon, especially I-95 corridor southeastward. Highs 75-82. Dew point lower to middle 60s. Wind S up to 10 MPH.

WEDNESDAY NIGHT: Cloudy. Showers likely especially I-95 belt southeastward, heaviest Cape Cod. Areas of fog. Lows 62-69. Dew point 60s. Wind SE up to 10 MPH.

THURSDAY: Mostly cloudy. Showers likely, most numerous I-95 belt southeastward. Highs 69-76. Dew point 60s. Wind E up to 10 MPH.

THURSDAY NIGHT: Mostly cloudy. Showers diminishing. Areas of fog. Lows 60-67. Dew point 60s. Wind SE up to 10 MPH.

FRIDAY: Partly sunny. Highs 76-83. Dew point 60s. Wind S 5-15 MPH.

FRIDAY NIGHT: Partly cloudy. Patchy fog. Lows 65-72. Dew point 60s. Wind SSW up to 10 MPH.

SATURDAY: Partly cloudy. Isolated to scattered afternoon and early evening showers and thunderstorms possible favoring central MA / southwestern NH. Highs 78-85. Dew point 60s. Wind SW 5-15 MPH.

DAYS 6-10 (AUGUST 8-12)

Trend is for stronger high pressure in the western Atlantic. At the surface a weak boundary may turn the wind back to easterly for a time August 8-9 with moderate temperatures, then a stronger push of southwesterly wind means some heat building in during the middle to end of this period. Limited shower and thunderstorm activity with most of the time rain-free.

DAYS 11-15 (AUGUST 13-17)

High pressure off the Atlantic Coast but also high pressure in eastern Canada means a boundary between the two may be closer to our region with continued warmth but a better chance of showers and thunderstorms during mid month.

37 thoughts on “Tuesday August 3 2021 Forecast (8:22AM)”

  10. Thanks Tk , Happy birthday to both . Not that bad of a day here on the south shore today before the rain tomorrow.

  11. Thanks TK.

    It appears not a lot of good weather conditions through mid month beginning tomorrow and especially Thursday.

    1. Not sure where you got that. Definitely not on WHW! There will be very few rain chances after Thursday for quite a while. 🙂

  12. Thank you TK and thank you all for the birthday wishes.

    I did go fishing without nightcrawlers. It was slow going and the water actually has receded too much. It was too low.

    I manager 1 largemouth (small about 1 foot) on a senko and 2 blue gill on a got to caterpillar artificial. Did not get skunked. 🙂

  14. It was one year ago today on the eve of tropical storm Isaias when I read this tweet from Ryan Hanrahan when I returned home from golf that I put all of my deck furniture in and I am glad I did it

    UPDATE: We are increasing the wind gust forecast across the state. We are more concerned about damaging wind and power outages. Be prepared for gusts up to 70 mph – particularly at the coast.

  15. Thank you for the birthday wishes. And Happy Birthday to Old Salty, too. Hope your wife is feeling better.

  16. After Thursday, the GFS 12z op run produces under 0.25 inch total at Boston August 6-19.

  18. Just curious if you buy the model shift to the west for Thursday’s rain and, if so, how much should folks expect. Seems like the cape can’t get a drink of water at all.

  19. JPD – were you fishing in south Natick? Water there has dropped quite a bit over the last week or so.

    1. It has in a few places out here also. Uxbridge has a watering ban during a few hours daily from now until sept 30

      1. The models I’ve seen on tv have trended westward if anything, away from the Cape and on top of Eastern MA. It would seem August will continue where July left off?

        What is the record rainfall for August?

        1. There was a bit of a westward trend then an eastward adjustment. This was coming after a major timing adjustment (at one point guidance had Thursday night and Friday as wettest).

          And these are just models – they are not always an accurate representation of how it turns out. Not sure Boston’s record rain for August, but it’s far too early to be worried about breaking records for rainfall. The upcoming pattern certainly doesn’t support Boston chasing that one. I’d have to look up Boston’s August record – not sure what it is but I suspect it’s pretty far up there.

          This wet weather event, by the way, is part of a different weather pattern than the one that gave us wet weather in July.

  22. Boston’s August rainfall record is 17.09 inches from 1955.

    I found it rather funny that with allllll this hype about wettest July ever, the July record at Boston was LOW compared to June & August. 😉 But it’s not as exciting to bring up those kinds of facts, or at least the news directors think it would be boring. 😉

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