Today’s Numbers: Heat Records Fall

6:00pm Saturday

Here’s a first look at the initial high temperatures for today, a couple of these may change since the cutoff time is 5pm.  Check out Astoria, Tillamook, & Salem!

The 93 at Astoria was the 4th warmest temperature on record out there.  The all-time high at Astoria Airport is 98, set just last August.  The 1st, 2nd, & 4th highest temperatures ever observed at AST have been set in the past 15 years.  I think a coastal heat wave blog post is in order at some point…”Is Heat Becoming A More Regular Visitor to the Oregon Coast?

Most of the metro area cruised in just below 100 degrees.  It’s possible a few of these will bump up one degree since once again the cutoff time is around 4:53pm.  We may have had a little too much easterly wind. The 98 (or will it be 99?) at PDX broke the old record of 96 degrees

One thing that makes our heat waves far more tolerable than say…a 100 degree day in Louisiana?  The humidity is EXTREMELY low.  Check out the 12% value at this hour!

Tonight will be warmer than last night, but nothing like a heat wave anywhere east of the Rockies.  If it was 98 in St. Louis during the day, I can guarantee you it sure wouldn’t drop down into the upper 50s and lower 60s at night!

That’s because we have that very dry air overhead.  That said, because the east wind will keep blowing at the west end of the Gorge and on some hilltops, those areas will remain in the 70s tonight…similar to those warm tropical trade winds you pay $$$ to fly to Hawaii for?  Tonight it’s free if you live in those spots.  So open up the windows and feel the breezes blowing through…after 10-11pm of course once we’ve cooled off.

Tomorrow’s general weather forecast is easy…SUNNY & HOT.  But the temperature details are very tricky.  That’s because a southwesterly surge of cool marine air moves up the coastline during the night, stalls over the Coast Range the first half of the day, then surges into the CENTRAL & SOUTHERN Willamette Valley in mid-late afternoon.  The timing is critical to reaching 100 or over in the valleys; an early arrival would mean no 100 degree day tomorrow.  If we ignore that southwest push…our atmosphere will be warmer tomorrow and we start with a warmer morning low; easterly flow through early afternoon should mean between 2-5 degrees warmer Sunday in the valleys and then the wind goes calm by mid-afternoon.  This is the perfect setup for maximum heating in the metro area; east wind early that backs off later in the day.  But from Salem south that  afternoon onshore push means your temperatures will likely be capped below 100 degrees.  In this pattern (I’ve seen it many times over my career here), the LAST place to see the cooling is the Portland/Vancouver metro area with a southwesterly surge.  As a result I’m forecasting 101 at PDX tomorrow, 2-3 degrees warmer than today, but down about 5 degrees in Salem.  Eventually that cooler air will make it in here AFTER the peak heating of the day as the east wind disappears too.  That will finish our 3 day heat wave.

Monday should be glorious with a good 20 degree drop in temperatures, then a morning cloud/afternoon sun routine with highs in the 70s Tuesday and Wednesday.

Chief Meteorologist Mark Nelsen

 

 

15 Responses to Today’s Numbers: Heat Records Fall

  1. Roland Derksen says:

    Some intresting clouds in the sky here, and the barometric pressure is dropping. I think we’ll be a lot cooler tomorrow.

  2. Garron 1/3 of a mile from the Hillsboro airport says:

    Mark-

    A couple of points of intrigue. #1. Is the cut off time for a daily high “official recording” 5PM? That would seem odd to me, what happens when the daily high occurs after 5PM?

    #2. We had an easterly gradient wind and Salem had Northerly wind all day yesterday Is that more typical for Salem to have northerly winds during heat events or just an anomaly due to the orientation of the heat low?

    #3. We have WNW winds at the PDX location currently and all night long. Is that because the easterly winds haven’t surfaced yet, or a sign the the heat low is moving inland faster than forecast?

  3. Alohabb says:

    I love this heat. Just spent 14 days in oahu and this is great. All though tradewinds there cool you off, the wind here feels like opening the oven door. And this warmth creates so much business we can’t keep up, so loving the heat!!

  4. Every time in recent years it seems that when an at or above 100 degree day is forecast it always Capps at 98 or 99 degrees. When I first moved to Oregon in 2004 it seamed that there were a good hand full of 100 plus degree days during the early years here, but now I can’t remember the last time we hit 101 or 102? I dislike excessive heat but if we are going to hit 98 or 99 again then we might as well hit 102 or 103!

  5. Every time in recent years it seems that when an at or above 100 degree day is forecast it always Capps at 98 or 99 degrees. When I first moved to Oregon in 2004 it seamed that there were a good hand full of 100 plus degree days but now I can’t remember the last time we hit 101 or 102? I dislike excessive heat but if we are going to hit 98 or 99 again then we might as well hit 102 or 103!

  6. Windsday says:

    So far no nights above 60 in the valley. Temps yesterday were right at 54F for a few hours. It’s already at 60F at the 1 o clock hour of the morning.

    If this were 2013-2015 regime we would’ve been in the 70s still maybe even around 80F at this time of the night during a heatwave like this.

    Instead we are having MUCH cooler lows. Sorry Mark your idea of no below 60F is WAY off. Not just a slight error of a degree or two.

    Maybe some hill spots are still above 70F but only in a few isolated spots.

  7. Now that Mark mentions coastal heat waves…it sure seems like the heat waves of recent years have had more offshore flow, and generally more impressive temperature departures west of the Cascades relative to east. In particular, I’ve noticed a lot of hot spells in The Dalles that start off with cool nights, due to the dry easterly flow.

  8. Paul D says:

    I’m hoping that cool air comes in and keeps us below 100! It’s far too hot, but there’s something nice about saying it wasn’t triple digits!

  9. lurkyloo says:

    My numbers:

    8 — times I had to dunk my head in the sink to attempt to keep cool.

    5 — times I had to refill my 2 dogs’ big water bowl

    100+ — times I said out loud (or to myself), “this weather can kiss my arse!”

  10. Lee Wilson says:


    We used Solar to keep cool .
    853 Watts can add up fast when you are running 2 air-conditioning units

    It is now 8:01. And we’re still warm..so I plugged 1 AC unit in.

    I hate to say it..but the one in our sons room an older unit…does better at cooling..the one in our bedroom is…well ALL but unless. And it is a newer unit..but then some idiot had to develop the thing where it blows the air upwards.

    • Windsday says:

      blowing the air upwards defeats the whole purpose. Hot air rises. Whoever developed that didn’t understand basic concepts of science/air flow or were told by some corporate dick head that didn’t understand or cared to know.

    • Alohabb says:

      I’m working on getting a solar package to handle running the ductless units. It won’t cover the whole cost but should be enough to
      Call it free heat/cooling.

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