Friday August 13 2021 Forecast (7:23AM)

61 Comments

DAYS 1-5 (AUGUST 13-17)

One more hot day from the Bermuda High before a cold front puts an end to the hot spell on Saturday – a transition day, then refreshing air by Sunday. First, more of the same today – sunshine, heat, and high humidity, but only the slight chance of a pop up air mass shower or thunderstorm later, although today’s high temperatures on average will likely come in a bit lower than yesterday’s, and the wind field is weak enough that a light sea breeze may develop at the shoreline, taking a few more degrees off the afternoon temperatures compared to yesterday. Similar to yesterday, a line of showers and thunderstorms will probably fire up over New York later, but today’s activity should occur further west and take longer to get into New England. However the remnants of that line may get into the WHW forecast area in the form of a few showers and possibly a thunderstorm sometime overnight (early hours of Saturday). The cold front responsible for that activity will then cross our region during late morning to late afternoon from west to east Saturday, and based on this timing combined with daytime heating, the greatest chance of showers and thunderstorms during the day Saturday will take place earliest (late morning-midday) in southern NH to central MA and eastern CT, then progress through the remainder of MA and RI early to mid afternoon exiting via Cape Cod later in the day. This frontal timing will not allow temperature to exceed 90 in most areas, and although it will start out quite humid, the passage of the front will deliver less humid air in rather rapid fashion as the day goes on. By Saturday night, we’ll have cleared out and much more comfortable air will have arrived, and this will be the case Sunday with lots of sun, mild air, and low humidity as high pressure builds in. This high will then sit over the region early next week with a great stretch of mid August weather.

TODAY: Mostly sunny to partly cloudy. Isolated afternoon showers and thunderstorms possible. Highs 88-95, cooler some coastal areas. Dew point lower 70s. Wind SW up to 10 MPH with light coastal sea breezes possible.

TONIGHT: Variably cloudy. A shower or thunderstorm possible overnight. Lows 70-77. Dew point upper 60s to lower 70s. Wind WSW up to 10 MPH.

SATURDAY: Variably cloudy. Scattered to numerous showers and thunderstorms from northwest to southeast late morning to late afternoon. Highs 82-89. Dew point lower to middle 70s falling into 60s. Wind SW 5-15 MPH shifting to NW.

SATURDAY NIGHT: Mostly clear. Lows 62-69. Dew point falling to upper 50s. Wind NW 5-15 MPH.

SUNDAY: Sunny. Highs 78-85, coolest coast. Dew point upper 50s. Wind N to variable up to 10 MPH with coastal sea breezes.

SUNDAY NIGHT: Clear. Patchy ground fog lower elevations. Lows 55-62. Dew point lower to middle 50s. Wind variable to N under 10 MPH.

MONDAY: Sunny. Highs 76-83, coolest coast. Dew point middle to upper 50s. Wind N to E up to 10 MPH.

MONDAY NIGHT: Clear. Patchy ground fog lower elevations. Lows 57-64. Dew point upper 50s. Wind variable under 10 MPH.

TUESDAY: Mostly sunny. Highs 78-85. Dew point upper 50s to 60. Wind variable up to 10 MPH with coastal sea breezes.

DAYS 6-10 (AUGUST 18-22)

High pressure holds with dry and seasonably warm weather for August 18. High pressure shifts offshore with higher humidity and chance of showers by August 19. August 20-22 indications are for a southwesterly flow with a daily opportunity for showers and thunderstorms as a frontal boundary moves into the region from the west. Does not look like an overly wet pattern, however.

DAYS 11-15 (AUGUST 23-27)

Uncertainty for this period pending the movement of a frontal boundary nearby and the potential for some tropical activity near the US East Coast. For now continuing with the idea of fairly humid and seasonably warm weather with the occasional chance for showers and thunderstorms amidst plenty of rain-free time.

61 thoughts on “Friday August 13 2021 Forecast (7:23AM)”

  7. Tk. Days 11-13 I know are wayyyyy in the future. If tropical activity, do you see it toward beginning of that period? Thank you, sir.

      1. On this run, quite the weakening and right hand turn prior to New England, with minimal western New England effects.

  10. Looks like Logan’s gotten to 90F, as of 10am.

    This is their 73rd (90F day) of this season. (A little sensor humor.)

      2. Yesterday I saw 18 so yep and air is dead here. I sat out for coffee. It wasn’t bad as long as I didn’t move.

  11. I haven’t ventured out yet, looking at the wind observations, I’m thinking today will feel a lot worse than yesterday. It was a hot breeze yesterday, but at least the air was moving.

    1. Logan’s wind is West at 5mph.
      Destined for a sea breeze? Likely. We shall see.

      Dp 68. Not nice but better than yesterday’s 72-73. 🙂

        1. It will certainly help with comfort level. Will it help develop that sea breeze? I can’t see how that would make any difference, but perhaps I am missing something.

          1. Many inland locations are reporting Calm wind.
            As that moves Eastward, I don’t see how Logan does
            NOT develop a sea breeze. Hope it becomes a strong
            one such that it penetrates inland at least to my location, if not more. I hope, I hope, I hope.

            1. It should make it at least to my neighborhood (Dorchester), but with water temps so warm now, it almost doesn’t matter that much in terms of real relief, albeit very brief. The high humidity sort of negates it as well.

              1. If the sea breeze is strong enough could bring coastal temps down to upper 70s or lower 80s.
                That beat the crap out of mid 90s!!!

                If sea breeze is not strong could still be close to 90 or anything in between depending upon strength.

  12. Thanks TK.

    It appears that even tough we get a bit of a break next week, high humidity will dominate the rest of the month. Oh well.

  14. SEA BREEZE TIME!!! Logan now sporting a robust seabreeze from the SE at a Whopping 5 mph!!!! 🙂 🙂 🙂
    That’ll knock down the temp for sure!!! NOT!

    Current ocean temp: 71.6 at Boston Buoy.
    68.7 at Stellwagen

  18. Thanks, TK.

    There was a warm “river breeze” for the second half of Wednesday night’s performance at the Esplanade. We needed to use wind clips for the music, but it was well worth it, especially after the sound check partially in the sun!

    I hope you get some relief today, JpDave.

  19. 12z GFS = BORING !!

    I want outrageous hurricane projections !

    Now I know how a model run without a big snowstorm in winter feels for the winter weather enthusiasts. 🙂 🙂 🙂 🙂 🙂 🙂 🙂 🙂 🙂 🙂 🙂

  21. Seabreeze materialized.
    That was expected.
    It’s an August sea breeze though, not a spring time one.

    Vicki… Optimistic about Aug 21-22 weekend. Long way to go though.

      1. Thanks Jimmy. Since I never even remotely heard about it from any old timers around here, it probably never made an impact on SNE? It certainly looked in prime position though.

        Maybe JPD remembers? 😉

    2. I was very brave and read. I have a request…..can you please move the track up this way well into NY state. Sorry to the folks in NYS

  27. I think tonight might be the most uncomfortable of all.

    Just picked up my daughter, so warm and thick outside.

    1. Indeed Tom . I just arrived in the city for an 11-7 shift & it’s quite warm out with lots of folks in the medical area out tonight .

  28. According to Dave Epstein:

    We will lose 2+ minutes of daylight per day. Morning darkness coming very soon. 🙁

    Warmth and humidity returns next week. No real push of fresh Canadian air to change the pattern. 🙁

    1. Happens every year. 😉
      late August to early November is when the rate picks up and peaks. No problem here. I love the transition of seasons. Endlessly fascinating as it is predictable. 🙂

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