2nd Warmest September

Now that we have today’s high and low temperature in, we can confidently say the average temperature will be 67.4 degrees, which just barely edges out 1991 to make September 2011 the 2nd warmest on record here in Portland.  Even more interesting was the average high of 79 degrees, which was warmer than July’s average!  That shows (once again) how chilly the first half of summer was.  That 79 is not in the top 5 though.  We’ve had several other Septembers with the average high temperature around 80, but the lows were cooler.  So the unusually warm nights really did it this time around.

Chief Meteorologist Mark Nelsen

121 Responses to 2nd Warmest September

  1. Thought my pressure was a mistake but it matches with other stations: 29.55″

    That’s the lowest since late March for me…

    Temp is down to 55.5 with 0.03″ of rain so far as well.

  2. Timmy_Supercell (Klamath Falls @ 4200') says:

    Very peculiar line of heavy showers, possible squall of convection off the Washington Coast on KLGX radar

    And ….. here is lightning! Yay

    If this intensifies maybe perhaps some 30-45 mph winds coming out of it. I’m already seeing early signs of ‘bowing’ structure on it.

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      Well 30-45mph seems kinda low for that… How about 50-60 mph, thats more like it.

  3. SnowedIn - North Plains says:

    Suddenly became QUITE gusty here…

  4. The new radar shows the front offshore very well…it’s so nice to be able to see this much detail finally.


  5. MomOf2Kiddos says:

    It just feels cold today. I had to get out my electric blanket 🙂

  6. My weather stats for September 2011 at my Battle Ground Station

  7. A dusting of snow at Timberline this morning.

  8. pappoose in scappoose says:

    Darkgoldenrod today:

    National Weather Service Portland or
    253 am PDT Tuesday Oct 4 2011

    The current model run has the gradients more southerly than previous runs…giving rise to possible strong winds over the waters and coastal headlands…will issue a high wind watch for the Oregon coastal headlands for this afternoon and evening with the morning package.

  9. bgb41 says:

    10/3/2011 Oregon (All) Temperature Summary

    High:85 at BULLY CREEK RESE(2500 ft) & CW2049 Imnaha(1978 ft)
    Low: 59 at MORGAN MOUNTAIN(4200 ft) & CW1075 Boardman(322 ft) & Blalock(280 ft) & Arlington(449 ft)

    High:36 at Timberline Lodge(7001 ft)
    Low: 28 at CROW FLAT (5130 ft ) & CRANE PRAIRIE (5500 ft )

    Largest Diurnal Change: 43 degrees
    HEREFORD (76/33 ) (3599 ft )
    Burns Municipal (72/29) (4144 ft)

    Heaviest Rainfall:
    1.21″ at BALD KNOB(3630ft)
    1.18″ at RED MOUND(1753ft)
    1.10″ at QUAIL PRAIRIE LO(3183ft)

  10. PaulB/Eugene says:

    Memo to Mark Nelsen:

    Please add this link to your Weather Page for ensembles, etc….


  11. Kyle says:

    What does that mean on your video Timmy of the low pressure being awayfrom the beach here and S flow aloft?

    I am on a laptop with stupid keys that my fat fingers overlap. ;( If I corredct errors using backspace I wind up leaving the page sometimes. My parents laptop; is pretty funky doing this.

    I wish I were home on my regular PC…..I don’t mean ON it or I would crush it to pieces with my weight.

  12. 57 now and raining with 0.22″ so far today. Only 62.6 today for a high, my coolest high for the month.

  13. Timmy_Supercell (Klamath Falls @ 4200') says:

    Uploaded a new video, basically analysing this low pressure system a little bit. Let me know what you guys think about this idea I have on my videos, I will be doing more of these for when we get bigger/stronger storms in the winter time too. And if it looks like there could be something added to each analysis perhaps commentary or more detail, I’m open for requests. However I do not have good recording software so not sure if commentary will exactly work….

  14. Joshua in Lake Oswego says:

    How can things change so much between the 06z and the 12z? We go from very cool to cold and wet in about a week to warm and dry. What happened in the world in that 6 hour period of time that made certain computer algorithms do a complete 180 degree turn? I just want to understand how the discrepancies can be so large from run to run.

    • umpire says:

      Joshua, I think that’s a great question, and one I’ve wondered about as well. Perhaps our AMS-Oregon board members on this blog might consider it as a topic for one of our monthly meetings. Just knowing what factors comprise the different models, what is more heavily weighted among the factors, etc. would be useful.

    • PaulB/Eugene says:

      When looking beyond days 7-10…or as early as beyond day 5…it really is more helpful to look at the GFS ensemble mean rather than just the operational run…..I use this website……this is particularly helpful when looking at a potential arctic outbreak in winter…..I just look only at the 500mb and 850mb charts…don’t get too caught up with the surface details.


      the ensembles are under Global Ensemble Models on right hand side of page

    • Joshua in Lake Oswego says:

      Thanks for the info Paul!

  15. Timmy_Supercell (Klamath Falls @ 4200') says:

    I guess cruddy weather like this means no comments!

    • Ryan (Walnut Grove) says:

      Has nothing to do with cruddy weather… Has everything to do with uninteresting weather models.

      Just like during summer when the models show two weeks of sun with seasonal temps no one posts either.

  16. Timmy_Supercell (Klamath Falls @ 4200') says:

    Impressive satellite imagery in the last 48 hours…

  17. El Donut says:


    Anyone know if this is visible in a product we can access?

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      Ya this ‘dual pol’ stuff is fishy…. I keep checking up on these new radars and I dont see anything new about them!

    • El Donut/Timmy… The public will in general not see any difference in the radar. It will be a while before even local news outlets have access to dual-pol information.

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      Ain’t that pretty… Well I won’t mind as long as we eventually get to see it.

  18. hmmm…our power was out for quite some time last night. Not sure of the cause??

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      In Vernonia im not sure what caused that either, winds could be no higher than 15-20mph…. Maybe some drunkie crashed into a power pole? Happens sometimes 🙂

  19. Timmy_Supercell (Klamath Falls @ 4200') says:

    A fail of a windstorm, here I had no higher than a couple 25mph and 28mph gusts occasionally. At least on NWS Observations…. And I don’t really see any loose tree branches and power never blinked…. This windstorm never quite met its defintion last night.

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