Tuesday Forecast

65 Comments

6:53AM

DAYS 1-5 (JULY 30-AUGUST 3)
High pressure off the East Coast brings heat and humidity for the final 2 days of July, something you may expect this time of year. Today’s risk of thunderstorms will be from the pop up variety, basically air-mass storms that bubble up in the heat of the day and rain themselves out. They can redevelop unevenly along a path before losing steam. As the sun starts to get lower in the sky, any of this activity should disappear for the day. Tomorrow’s threat may wait longer to occur but will be triggered by an approaching cold front, and more of the region may be impacted between mid afternoon and mid evening. The front that brings this activity to the region will move offshore Thursday and high pressure will then build in later Thursday through Friday with great summer weather, before the high slips offshore Saturday allowing a bit more humidity and heat back into the region.
Forecast details…
TODAY: Mostly sunny to partly cloudy. Isolated afternoon showers and thunderstorms. Humid. Highs 88-95. Wind SW up to 10 MPH.
TONIGHT: Partly cloudy. Risk of a shower or thunderstorm early. Humid. Lows 67-74. Wind light SW.
WEDNESDAY: Variably cloudy. Scattered to numerous afternoon thunderstorms, especially afternoon and evening. Humid. Highs 84-91. Wind SW 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Scattered showers and a risk of thunderstorms. Humid. Lows 66-73. Wind light variable.
THURSDAY: Partly sunny. Chance of showers early morning, favoring southeastern MA. Less humid. Highs 80-87. Wind NW 5-15 MPH.
THURSDAY NIGHT: Mostly clear. Patchy fog interior low elevations. Lows 58-65. Wind light variable.
FRIDAY: Mostly sunny. Highs 78-85, coolest along the shore. Wind light variable with sea breezes.
FRIDAY NIGHT: Mostly clear. Lows 60-67. Wind light variable.
SATURDAY: Mostly sunny. Highs 83-90. Wind light SW.

DAYS 6-10 (AUGUST 4-8)
Heat and humidity August 4 with a risk of thunderstorms later in the day as a dissipating cold front approaches the region from the west. Weak high pressure brings fair weather August 5. A broad trough will move across the region sending a stronger front through the region with more cloudiness and a cooling trend with a couple episodes of unsettled weather during the August 6-8 period.

DAYS 11-15 (AUGUST 9-13)
High pressure from the Upper Midwest brings fair, pleasant weather to start the period then a gradual build in humidity and some heat thereafter with a risk of showers/thunderstorms returning later in the period.

65 thoughts on “Tuesday Forecast”

  1. Thank you, TK.

    I fly from Boston to London tomorrow evening. Sounds like thunderstorms are in the forecast which could delay things. Could these be severe enough to cause major delays?

  3. Thanks TK !

    Enjoy your trip to London, Joshua. Hopefully, it has cooled off significantly there.

    1. From what I’ve read, an abnormally wet spring seems to be the attraction. LV is already four inches above the annual average.

      1. Yes, they did say a wet Winter and Spring can bring this about.
        Very strange as there is no grass, so I wonder where do they
        come from????? I have been to Las Vegas way too many times.
        The landscape is PUTRID!!! It is almost a desolate grey except
        for where grass and palm trees have been planted and watered.

        It just doesn’t make a lot of sense to me. Do they fly in from the mountains? Are they like cicadas and hatch every so many
        years under the right conditions and if so, where did the insects
        come from to lay the eggs.

        Ah, another mystery.

        Weird.

    1. Will it remain marginal or get changed to slight?

      6Z NAM has Marginal Severe for Tomorrow. We may get a hint with the 12Z Nams.

      1. 12Z NAM still says marginal severe, so I suspect
        this doe not get changed when they update early this PM.

  6. I am thinking right now tomorrow somewhere in SNE will see a locally strong to severe storm. This certainly is not a widespread severe weather event.

  7. Luckily i have a morning flight out of Logan, so I don’t have to worry about severe weather impacting my flight. Going Logan to San Juan PR (5 hour flight) then San Juan PR to St. Thomas. Stay over is 40mins.
    They been experiencing some tropical waves this week with some heavy rainfall. Which by the way I will take since the way I get my water at the apartment is through a cistern system.

  9. Tom, thank you for your note. London has cooled off. Looks like 70s and a chance of light showers (typical London summer weather, and fine with me). The work portion of my trip occurs as soon as I land – 3 hours of meetings. Then, I’ll head to my daughter’s in North London and enjoy 3 days with her, traipsing about the large city.

  10. I think today might end up being the 2nd most uncomfortable feeling day of the summer, beaten by that Saturday a few weeks ago with mid – upper 90s and mid 70s dewpoints.

    Eastern mass dewpoints running 71 – 73F as of 11am and temps already approaching 90F.

  11. A couple runs of the EURO lately have had a tropical system in the Atlantic.

    As of now, based on the projected 500 mb flow, a system would have to track very far south in latitude to not be picked up by the jet stream and get swept out to sea.

      2. I think it is a requirement to have all climate stations
        either sitting on top of asphalt or located very close to large
        sections of asphalt. It’s the only way to go!

        1. I seem to recall TK gave a reason for having them at airports. It makes sense but I do think it would be good to find a central location in Boston that is more representative of the conditions.

  16. Today is really “close,” as they say in central Pennsylvania. The air is thick. Harder to breathe. Difficult to run in this weather.

    1. As you know my nana and mom would use close. And it is. I didn’t think it was as hot/humid as the saturday a bit ago but when you try to do something it sure seems to be.

  17. Now “only” 88 at Logan with a SE wind at 9 mph.

    I thought a sea breeze would be negated today.

  18. I was not expecting to see this a Severe Thunderstorm Watch for Litchfield County where I live in CT.

  20. Logan up to 93 with land breeze, but for some reason the DP is down to 66.
    DPs up to 74 South of the city towards the South Coast.

    1. make that 75 at Kingston, RI.
      And I heard TV mets say this week would be more tolerable than that
      recent Heat/humidity Blast!

      Mrs. OS firmly believes that the mets are under management ORDERS
      to under sell how humid it was going to be. IF that is so, I am outraged
      and DISGUSTED!!!!!)(@#Y*@&!*(#^!*(@^#(*!@^#*^!@*(#&!*(@#&!(@*#&(!*@&#(*!@(#&(!*@#&(!*@&#(*&!(@*#&(!*@#&(!*@&#(*!&@(*#&!@*

      1. Just my opinion, I don’t think that is the case for today.

        I think the models were a bit slow to pick up on the 850 mb temps of today (only about 48 hrs notice, whereas we almost saw the last heatwave coming for 7+ days).

        Also, overall, a lot of the 2/3rds of the eastern US still has an above average water table and so, any hot humid pattern is going to end up more humid than modeled/expected.

  21. What’s with the convection in Central and Eastern MA. It build up then goes poof?
    Not enough shear? Running into drier air. Just seems odd during the afternoon
    with the sun’s heating????

    1. That’s fine with me. Yesterday I almost got caught in a brief drenching. Fortunately I just managed to get to a building for shelter.

      I hate it when the devil beats his wife (bright sunshine during a downpour). 😉

  22. I got a caught Saturday on the golf course in a torrential downpour with thunder and lightning which was not fun. I was fortunate I didn’t have to go far to get to my car.

  24. There is definitely much less convection today compared to yesterday. There should be more than enough come tomorrow afternoon.

  25. A little warm upstairs to support much development.

    SAK has a plethora of data that basically shows plainly that Boston’s temps are OTL. More later…

  26. Logan, Norwood and Bedford all sitting at 97.
    Are all 3 incorrect? Curious. There was a time I thought Logan’s thermometer
    was a piece of shit. To me anyway, seems more in line lately.

  27. Thank you TK.

    Apologies for not paying better attention and reading all of the info but is tomorrow supposed to me more wide-spread storms?

  31. Tomorrow’s risk of t-storms is increasing, I believe. Given the heat levels and the cold front that’s crossing the region that makes sense. My flight leaves at 7:30pm tomorrow, just in time for the atmosphere to be at its peak in terms of instability. Fun! I’m a bit apprehensive at this point. I never was in the distant past. But, I’ve developed a fear of flying over the last 10 years. Ironically, the less I fly the more I fear it, and I definitely do, particularly when t-storms are around. I can’t inebriate myself tomorrow (not that I would, I hardly ever drink), because I have to work as soon as I touch down in London. Time to think positive thoughts.

    1. I know I’ve said before but like you Mac grew up on either a plane or a cruise ship on home leave…..not to mention a sister who flew 40+ years. He was more nervous about flying when older. I sort of has the sense his parents might have been too

      1. Interesting. And, I do recall you saying that.

        I’m rational enough to know that the chances of something bad happening on the way to the airport or in the train/bus in London are much greater than an airplane mishap. However, there’s something helpless about being on an airplane.

        I have tremendous admiration for astronauts. Unlike normal air travel there’s a significant risk for astronauts of something bad happening. Yet, off they go – the space station, on the space shuttle, to the moon.

  32. Vicki had a very brief down pour and got a little breezy. Saturday I experienced torrential rain thunder and lightning.

  33. Vicki on Saturday I was playing the third hole and there was a sun shower initially. I noticed walking up the hill to fourth hole the clouds darkening and heard thunder. It started to rain and I headed for the car and sat in the car for 45 minutes with torrential rain lightning and thunder happening. I then resumed the round and it was worth the wait getting a par on a hole I only pared two times prior.

    1. Love this, JJ. The thunder gods were there for you. It’s only fitting knowing you love T storms so much

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