3:00pm Update

Wow!  Looks like even without the east wind (it never made it out of the Gorge), our light north wind is mixing down the drier & hot air.  It happened first earlier at Hillsboro, now PDX has made a 5 degree jump from 97-102 at 3pm.  Best bet is that it maxes out near 104 or 105 at PDX.  How exciting, the warmest temperature I’ve seen at PDX my career is almost here!

As you have all noticed, a thick layer of cloud cover is approaching, just in time for…tonight.  The GFS & our RPM model showed this yesterday, and apparently they are right.  It should move overhead during the nighttime hours, then head out of here early tomorrow afternoon.  So cooler tomorrow, but what about a cloudy night AFTER a 104 degree day???  Our model shows mid-upper 70’s, which has never occurred at PDX.  The record warm low is 74.  Considering how thick the cloud cover is, this could be a record breaker.  I’m glad the clouds didn’t show up midday and ruin our high temp….more later…Mark

151 Responses to 3:00pm Update

  1. Anthony Bertolo says:

    Hmm… It is 80 degrees outside, and it is 4am. If the clouds break early tomorrow, what does that mean?

  2. Derek Hodges says:

    All the folks on the west side stand a much better chance of rain from this band coming through. Part of it is shifting Northeast toward us even though at a quick glance you could never tell.

  3. Ian says:

    wow. drove the jeep home (to longview, from near PDX – the airport) top off, and passed a sign in vancouver that read 103, around 4pm.
    it isnt as pleasant as it sounds going 70 in a topless, doorless jeep in 103 degree heat. it feels similar to sitting in front of a heater in 90 degree heat. all that breeze whippin around is hottter than heck.
    i know it isnt the right thing to do, but this heat sure makes a beer taste good.
    hope everyone enjoys the heat in front of their computers, ill be out on the river on the boat, campin then on the boat again sunday. boats, booze, babes, boards.

  4. salemphil says:

    Darn, I missed the sunset…can’t see west from my new apt. 😦 but boy those clouds coming up from the south sure do look dark…A thunderstorm would be the perfect end to a day like today!!!

  5. Derek Hodges says:

    Too bad I couldn’t find my camrera, lol, even before you noted it. Ok the “second disturbance” that I have been refering to you can see on this water vapor image, http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=pqr&area=nw&type=wv&size=4 It looks more potent than the one impacting us, has hours to strengthen, and will hit us when we are more ripe for storms..

  6. Justin says:

    Get a load of that sunset, whoa!

  7. Derek Hodges says:

    This first one will “moisten it up” and if the other one can roll in about 4AM everything will be prime for some big storms.

  8. Droppin says:

    Well we all agree this is by far the warmest, muggiest evening, and likely night we’ve ever had, coupled with the disturbance moving overhead tonight with such a rich south, southeasterly flow, and ample low level moisture to feed any convection. The question is, can we break the cap? When that disturbance moves overhead tonight will it cool the upper layers enough? It obviously will not take much to get convection firing late tonight. We shall see.

  9. Justin says:

    You need one to find the other, so you need a digital weather station that will record dewpoints. So if you don’t have one, I think you’re out of luck for humidity. And the equation for finding relative humidity is fairly complicated, but without a DP measurement its useless.

  10. Derek Hodges says:

    93.1 degrees still

  11. Derek Hodges says:

    Hey Droppin, what are your feelings by when you say ” I mean it seems like it’s going to be bad tonight.

  12. Droppin says:

    Wait until 11pm or so, then it’s going to feel like Florida outside.

  13. Derek Hodges says:

    So does anybody know how to get dew points from humidity and temp, so I can do it for my house instead of near by stations. Anyway looks to me like a batch of something will roll through here about 4AM or so, maybe..But by afternoon it will clear out here, I am pretty sure of that, maybe earlier.

  14. Justin says:

    Now 66 DP and 46% RH, getting quite sticky out there.

  15. Justin says:

    I think if we get any rain here overnight, the raincooled surface/alower atmosphere will not be able to sustain 100 degree heat to begin with, add overcast skies as we saw today and we’d be lucky to get to 99. I’m going with 97 for tomorrow, some things could change but I really don’t think it looks supportive of 100 degree heat.
    And I forgot how to calculate relative humidity values, I don’t have a weather station to do it for me either. Walnut Grove reporting 65 degree dewpoint still, 34% RH.

  16. Derek Hodges says:

    tricky forecast to say the least. I need to research a little but I think we can make a good guess if we look at the overall flow of things.

%d bloggers like this: