91 in Portland Monday

11pm Monday

Even with the thick fire smoke overhead we managed to make it over 90 in Portland once again as we head into a 3 day period of hot weather.  That makes today our 27th day reaching 90 this year.  It appears we’re going to break a record this year…likely early next week.

90 Degree Days Summer Heat

Assuming the smoke is at least as thick tomorrow, we should stay in the low-mid 90s once again.  IF we had typical clear blue sky I would forecast 100 degrees for Tuesday.  We have light easterly flow through the Gorge and over the Cascades plus 850mb temps should peak out around +22 by afternoon.  Luckily that smoke coming from fires in British Columbia, Northern Washington, & SW Oregon will keep temps lower.

There’s one other bit of good news, our average temperature begins to fall off tomorrow as we move into the final weeks of summer.

Heat of Summer Hot Temps

EVENTUALLY, it will turn cooler after this blazing hot summer of 2018!

Chief Meteorologist Mark Nelsen

14 Responses to 91 in Portland Monday

  1. 51 °F overnight. Not the coolest night of the summer, but close. It was 48 °F on the morning of 3 July here. Several other overnight lows tied this morning’s figure as well.

  2. D in Mac says:

    I e-mailed Andy about this — must not have received it. Checking weather records in McMinnville, which go back to the 1800s, I found this — in 1931, from May – Sept., Mac had 50 days 90 or over. In fact, 1931 still holds high temp records for particular dates at 20.

    Just wondering how Portland’s record of 29 days of 90 or over is 21 days shorted than Mac.

  3. W7ENK says:

    “It appears we’re going to break a record this year…likely early next week.”

    Wait, how does that work? If our record is 29 days, and yesterday made #27, today is supposed to be pushing 100 degrees which would make it #28, tomorrow in the 90s would tie the record at #29… so Thursday would break the record, right? Unless something changed and now we’re not going to hit 90+ on Thursday and through the weekend?

  4. Jason Hougak says:

    Nasty looking outside, reminds me of the Eagle Creek and Pit36 fires. I can’t wait for a beautiful blue sky, snow covered day with crisp air…. ahhh.

  5. Paul D says:

    Our average temperatures may start dropping, but this hasn’t been an average summer! It’s going to continue to cook 😦

  6. alohabb says:

    What is that think haze this morning, did smoke filter in?

  7. GFS says scorching Monday, EURO disagrees

    • Ken in Wood Village says:

      Did you look at the Surface Base Cape for Monday? Both the GFS and EURO show some Cape around the Portland area. If we do have those temps maybe we could have some type of excitement…lol.

      • Muxpux (Castle Rock) says:

        If it’s accompanied by some soaking rains, BRING IT ON!!

      • W7ENK says:

        CAPE was elevated last Friday night, too. There just wasn’t any moisture, and even if there was (like on Saturday) LI stayed positive.

        Thunderstorms around here require the perfect mix of several ingredients, and if any little thing is missing of even just slightly off, then we get nothing.

        I recall an instance one August back about 4 or 5 years ago, the Willamette Valley had CAPE values in excess of 3,500 J/kg overhead, but there wasn’t a cloud in the sky. LI was positive, and there wasn’t any appreciable moisture in the entire column. It was a huge, disappointing waste.

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