3 Day Heatwave Ends Tonight

5pm Friday…

97 in Portland today, what a scorcher, especially for one of the last few days of August.  It was our 4th hottest temperature of the summer:


The numbers around town so far…


And for another day the heat made it to a good chunk of the Oregon Coast.


Quite impressive considering the flow was just barely offshore this time around.  That airflow is now turning to “onshore” which means air begins flowing from the ocean to inland areas.  Yes, that’s what we refer to as “nature’s air conditioning”.  Expect a huge drop in temps tomorrow as a result.  Down a good 10-15 degrees for most of us and a solid 20 degrees at the coastline (in spots that were hot today).

Our 90 degree day count for this season here in Portland is now above average (barely) at 14, of which 9 have been this month.


The 30 year average is 13 days (technically 12.9) at/above 90.  In the end, this summer, June-September, will end up being warmer than normal with about the average number of 90 degrees days, maybe another 1-3 coming in September…we’ll see.

Chief Meteorologist Mark Nelsen


15 Responses to 3 Day Heatwave Ends Tonight

  1. Paul D says:

    Only one day above 75 in the 7-day forecast!!!!!!!

  2. WEATHERDAN says:

    I have had 21 days of 90 or hotter this year compared to a normal of 15. in 2014 we set a record with 35 and last year we had 30. We might see another 2 or 3 this yet this year. We did however set a record today with our 73rd consecutive night above 50. Our old record of 72 was set in 2014 and tied in 2015. Looking ahead it looks cooler and wetter from the 31st through the 6th then warmer and dry. The trees could really use the rain. 77 at 1:00 PM on our way to 84. Peace.

  3. SortingHat says:

    Most of the week the sky was baby blue but today the skies are almost completely yucked out.

    They are at least 6 different lines across the sky at once in weird directions trying to make the (classic) checkerboard pattern others have also seen being made but are failing cause the upper-level winds just rip it apart as fast as they make them.

    All that fuel being wasted at our tax expense.

  4. 88F maximum here for the 2nd consecutive day yesterday. I think I can forget about 90’s from here on in until 2017. I might see a couple of 80’s yet if conditions are right before the equinox comes.

  5. Paul D says:

    “maybe another 1-3 coming in September…we’ll see” – NOOOO!! Don’t talk like that.

  6. Garron 1/3 of a mile from Hillsboro Airport says:

    Brian Schmidt pointed out that we had 8 or 9 days at 89 degrees in Portland this summer. That would’ve changed that graphic quite a bit if all of those had ended up being 90 instead.

  7. Anonymous says:

    No temperature readings for me because my thermometer is indoors right now due to work being done on the outside of the house. Definitely was well into the 80s up this way. Barometer is at 1011 mbar and falling rapidly. Something is obviously coming.

  8. Colin says:

    Now that we’re ending August and given that El Niño is over do you expect warmer than normal temperatures to continue into fall/winter? I’m wondering if that trend continues or if we see a normal/cooler season ahead?

  9. Paul D says:

    Good riddance heat wave. Don’t come back.

  10. Joshua Downtown PDX says:

    First. Certainly doesn’t appear that there will be any 90s for the first 10 days of the month. Nor 80s for that matter.

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