Extreme Heat is Gone, but Hot Weekend Still Ahead

9:30pm Friday…

A quick post this evening. Here’s a summary:

  1. We are done with 100 degree temps, we’ll be in the mid 90s tomorrow, then lower 90s Sunday
  2. Humidity remains relatively high this weekend
  3. Smoke coverage will be similar tomorrow, if not a bit less, west of the Cascades
  4. Most of the smoke disappears Sunday afternoon; both at lower elevations and high overhead
  5. Heatwave #4 this summer will end up with 6 consecutive 90+ degree days

A thick layer of smoke kept us below 100 west of the Cascades today; we’ve been thinking all this week it might happen. Smoke modeling did pretty well!

This was our 22nd day at/above 90 degrees in Portland this summer.

But Salem just broke the all-time record. Today was the 35th day at/above 90 degrees. Those records go back into the late 1800s!

Strong high pressure remains nearby through Sunday, but increasing (cooler) onshore flow means temperatures drop a bit over the weekend.

HRRR smoke modeling has done relatively well the past two days, and it shows slightly cleaner air (at ground level) tomorrow morning

Then a 2nd push of marine air tomorrow evening really clears things out. By Sunday, just about all low-level smoke should be gone…we’ll see!

That’s it for tonight… Enjoy your weekend!

Chief Meteorologist Mark Nelsen

32 Responses to Extreme Heat is Gone, but Hot Weekend Still Ahead

  1. tim says:

    Our lemon Goes 17 hasn’t been work properly the past few days in and out of data on uw loops, time for a new satellite.

  2. runrain says:

    Fire near Mt. Jefferson now throwing up a pretty good pyrocumulus cloud but I haven’t heard any update on it. Quite visible from Portland. Can see part of the Oakridge fire too.

  3. Weatherdan says:

    86 at 3:00PM. Right in my comfort zone. 62nd consecutive day without measurable precipitation. Only 28 more days to go to tie the record. Peace.

  4. Anonymous says:

    Hmm… according to PurpleAir, air quality is over 50 for most of the metro.

    Lingering smoke, new smoke, or just a smog problem?


    • W7ENK says:

      That’s really weird, I’m not seeing that at all on other products…

      I wonder if there’s something buggy with their network?

      • Anonymous says:

        Yeah I’ve noticed a huge discrepancy between AirNow and PurpleAir over the last several days. In fact I think it’s AirNow that’s problematic because when we were at the height of the smoke last week, AirNow was reporting decent air quality for my area… that was obviously false.

        PurpleAir is basically crowd-sourced and potentially a more accurate representation of what the actual air quality is around Portland. That said, it could be the software is getting outdated info, not sure…

  5. Anonymous says:

    Looks like we get some boring weather over the next 10 days… thank goodness! GFS operational only shows a couple of days of 90+ towards the end of the month too. Hopefully it sticks!

  6. Hank says:

    Evan — cedar mill

    I saw your comment on the last post,
    It seemed as you were looking for a weather station and here’s my suggestions from my 5 weather stations I have owned,
    I have owned 1 La Crosse 2 Accurites and 2 Logias, and the logia brand has out preformed them by far, if your budget can afford 160$,
    I would go with, Logia 7 in 1 weather station, tips for logia 7 in 1, if it isn’t accurate, you got a manufacturing dud, this happened to me but customer service sent me a new one, and that happening is extremely low odds, also i suggest to order it on Amazon if you were to get it.

    But this is just a suggestion, and if you have already bought one, I hope it works great for you!

    • Evan -- Cedar Mill says:

      Yeah I was stuck between the logia and the ambient weather W-209C but I went with the ambient weather because it seemed like the software and website for viewing the data was more sophisticated.

    • Evan -- Cedar Mill says:

      Buy anyway thanks for the suggestion!

  7. Roland Derksen says:

    The air is definetly clearer here today- i can see the mountains, and my eyes are feeling better. Anyway, looking forward to the chance of seeing showers here either late tonight or tomorrow.

  8. tim says:

    The last week of August is still looking hot more 90s possible, not looking forward to another hot smoky September.

    • Anonymous says:

      It’s two weeks out. It looks like the next heatwave people were talking about happening later this week has already fizzled.

  9. yspofor says:

    90’s are still too hot! I know you have no control of the weather,  but hope the thermostat gets turned down soon!Sent from my Verizon, Samsung Galaxy smartphone

  10. Paul D says:

    A few days ago I posted:

    “I see Monday’s high has crept up from 75 to 78. It’ll be 80+”

    It’s now 86.

    Sigh…..sometimes I hate being right.

    • Anonymous says:

      Don’t see it happening, that’s a outlier right now

    • Gene says:

      You should be thrilled — low/mid 80s are much more comfortable than the mid/high 90s we’ve been having recently. Plus, looks like the smoky skies will be gone, too. Not much to whine about, really.

  11. tim says:

    Off topic, Seahawks are making a comeback in the second half they always been a second half team for some reason, unsolved mystery I guess.

  12. tim says:

    If you believe the climate models cfs particularly we could see a pattern change by mid September until then hold on tight.

  13. tim says:

    If the 00z gfs is right all the way through the run pdx could break the record.

  14. W7ENK says:

    Oh, thank goodness!!

  15. Paul D says:

    Under 100 but still too hot

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