Tuesday September 7 2021 Forecast (7:21AM)

35 Comments

DAYS 1-5 (SEPTEMBER 7-11)

It’s been a while since a forecast outlook has been filled with many fair weather days, but this one is filled with 4 out of 5. The slower timing of the next frontal system makes it pretty much a Thursday system, with two fair-weather days on either side of it. First, high pressure moves over us today with a top 10 kind of day, then the high slides offshore for a warmer and slightly more humid day on Wednesday before a slow-moving cold front crosses the region taking nearly all 24 hours of Thursday, possibly delayed by a wave of low pressure on the front that may also enhance rainfall. But despite it’s slow movement, the front will clear the coast by Friday and we end up with two great days with dry weather and lower humidity to end the week and start the weekend Friday and Saturday as Canadian high pressure arrives. Also, still need to mention the large swells, rough surf, and rip current risk for coastal areas late this week due to offshore Hurricane Larry. Keep that in mind if you have any beach/boating plans.

TODAY: Sunny. Highs 71-78. Wind W up to 10 MPH.

TONIGHT: Clear. Lows 56-63. Wind SW under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 76-83. Wind SW 5-15 MPH.

WEDNESDAY NIGHT: Clouding up. Showers arriving from west to east. More humid. Lows 61-68. Wind S 5-15 MPH.

THURSDAY: Cloudy. Widespread showers with embedded thunderstorms possible. Humid. Highs 71-78. Wind S 5-15 MPH becoming variable.

THURSDAY NIGHT: Clearing. Lows 55-62. Wind W up to 10 MPH.

FRIDAY: Sunny to partly cloudy. Highs 70-77. Wind NW 5-15 MPH.

FRIDAY NIGHT: Clear. Lows 51-58. Wind NW under 10 MPH.

SATURDAY: Sunny. Highs 72-79. Wind SW up to 10 MPH.

DAYS 6-10 (SEPTEMBER 12-16)

High pressure moves offshore with fair and warmer weather September 12. Right now it appears the next frontal boundary comes through quietly early September 13 with fair weather continuing through mid period with only a slight cool-down. Next round of unsettled weather comes September 15 and/or 16 with the approach and arrival of a trough and frontal system from the west.

DAYS 11-15 (SEPTEMBER 17-21)

A generally zonal (west-to-east) flow pattern is expected with limited rainfall chances and a couple air mass changes keeping temperatures variable, but not that far from normal overall.

35 thoughts on “Tuesday September 7 2021 Forecast (7:21AM)”

  4. Good morning and thank you TK.
    Yesterday was stellar. Perhaps best day of the entire year.

    Pkeasevkeep rain to a minimum Thursday. Thank you

  7. Thanks TK.

    I believe that the new pattern has every midweek period (Wednesday and/or Thursday) will be unsettled for awhile. Both of my days off too.

  11. Here’s a stat your won’t hear on the news but is of interest to weather followers…

    No western Pacific typhoons in the month of August.

    Last time this happened: 1945.

    1. Most interesting. What does it mean, if anything?
      What does it mean for our upcoming Winter?

      Took a little ride yesterday and passed through Dedham, Westwood, Dover, Needham, South Natick and Sherborn.

      Passed by or along the Charles River several times. This was 5 days after the deluge and was that river ever HIGH! Haven’t seen it that high in a long time. It looked scary. Don’t need anymore rain to fall on Thursday. Hoping for any rain to be a minor amount.

      1. Probably not much.
        It’s an infrequent occurrence, no probably a result of a coincidence of several factors.

        Probably no implications for winter

      2. Charles at South Natick dam just getting back inside banks. Happy that we don’t have another big soaker on the way.

  14. Even though he won’t come anywhere near, Larry’s passage is probably helping to slow down the eastward movement of the trof Wednesday night/Thursday, allowing for some extra ripples of showers.

        1. Oh I understand that, but if it suddenly stops raining … we’ll find ourselves in drought in short order. A great deal of the rain we got this summer ran off and is long gone. Even after a wet pattern subsides, a “normal” rain pattern is more beneficial than a dry one.

    1. Well, first let me quote myself from today’s blog:
      “First, high pressure moves over us today with a top 10 kind of day…”

      Based on that, I’d say yes, I agree. 😉

  16. DB…
    Sorry I did not get to your question earlier.
    I think with the potential of a wave developing on the frontal boundary we could see about 1/4 to 3/4 of an inch region wide with a few areas coming in around or a little over 1 inch for the Thursday event.

  17. Just an awesome evening. The sun wasn’t hot enough when it peaked onto the deck to have to use the umbrella. Although, the mosquitoes seem to like that also. We have not had them before around 8:00 until now. Apparently, they are in a different time zone.

    1. We had them yesterday (a similarly great day) at around 4pm; they chased us in from the deck. Weird — that’s never happened that I can remember.

      1. Same here. I’m wandering the yard tomorrow to make sure we don’t have standing water and did ask ohDEER to treat soon. They are due in a bit over a week but kids want to be outside …..their nana too 🙂 🙂 🙂

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