Bright Fall Colors

DSC_6427  Don Best from Rockaway sent me this picture today.  He's a prolific photographer.  There are several other photos in the photo album to the left.  It's been a great Autumn for colors, possibly due to the consistently chilly nights and warm days?  I'm not an arborist, so I don't know, but I do know that I have been able to get outside regularly before work most mornings since Labor Day.  I don't think we've had more than 3 days in a row that were wet or cloudy this season.  I got quite a bit done at home the last few days with just perfect weather.  Part of that included keeping a close eye on an old still smoking slash burn pile on property right next to mine.  It never got beyond that, but I was a bit nervous early Sunday morning when I could see sparks being blown around by the east wind!

Moving on…a weak upper-level disturbance is passing over the middle of Oregon right now.  It's headed off to the northeast…too bad it isn't July because it would have been a prolific thunderstorm producer.

A weak cold front is gradually approaching from the west, but models say it never reaches us due to a new and deep upper-level trough developing in the eastern Pacific around 140W.  This trough sends waves of moisture along with surface lows north around 130-135W Thursday and Friday.  That's too far west to give good southerly gradient along the Coast, but is close enough to turn as back into easterly low-level flow over the metro area from tomorrow evening through Saturday.  IF we get significant sunshine Thursday, the combination of that easterly low-level flow and warm southerly flow above could push our temps up close to 70 degrees.  That's near record territory.  Too much cloud cover though and we stay in the low-mid 60s.

It still looks like November starts just like it should…wet.  I don't see any big & windy storms early next week, but compared to the last few weeks it looks much more active…Mark Nelsen

55 Responses to Bright Fall Colors

  1. Boring Larry in Cherryville el.918 says:

    Mark…fumbling with your transmitter when your spot started?

  2. Boring Larry in Cherryville el.918 says:

    Mark…fumbling with your transmitter when your spot started?

  3. Boring Larry in Cherryville el.918 says:

    Drive Triforce drive
    in the blogmobile
    some would say
    that you might be
    the captain on this ship….
    (with apologies to Blues Image)

  4. Ben says:

    December 14th, 2-4 inches on valley floor.

  5. Ben says:

    December 14th, 2-4 inches on valley floor.

  6. Ben Randall (tillamook) says:

    when will we see some snow on the lowest elevations?

  7. Ben Randall (tillamook) says:

    when will we see some snow on the lowest elevations?

  8. Ben Randall says:

    that is a pretty picture i love seeing the pictures on tv

  9. Ben Randall says:

    that is a pretty picture i love seeing the pictures on tv

  10. TriforceofEternity says:

    54F now andd still cloudy.

  11. TriforceofEternity says:

    Last time I practiced on Right hand turns in the neighborhood by South Salem High School but school must have got out at 2:30 as there were LOTS of pedestrians: So I changed it to 1:30 instead of 2:00.
    The driving instruction lasts for an hour.

  12. TriforceofEternity says:

    Last time I practiced on Right hand turns in the neighborhood by South Salem High School but school must have got out at 2:30 as there were LOTS of pedestrians: So I changed it to 1:30 instead of 2:00.
    The driving instruction lasts for an hour.

  13. luvry (in tanasbourne) says:

    Oden is in MRI right now, per a close source we know and love, should have an update by 1:30 PM PST.

  14. Punxsutawney (aka HIO Phil at work by Sunset High ~280' elevation) says:

    Good Luck Triforce.

  15. Punxsutawney (aka HIO Phil at work by Sunset High ~280' elevation) says:

    Good Luck Triforce.

  16. Cherie_in_Vernonia says:

    50 & overcast….the sun is trying to burn thru.
    Congrats Triforce on your driving lessons. Hope they go really well!!!
    Must be windy on Mt St Helens…
    http://www.wrh.noaa.gov/pqr/msh.php

  17. TriforceofEternity says:

    Cloudy and 50F out. At 1:30 I am to drive with my driving instructor.

  18. TriforceofEternity says:

    Cloudy and 50F out. At 1:30 I am to drive with my driving instructor.

  19. TriforceofEternity says:

    Cloudy and 50F out. At 1:30 I am to drive with my driving instructor.

  20. Punxsutawney (aka HIO Phil at work by Sunset High ~280' elevation) says:

    Thanks for the info Sandi,
    It was really foggy in Hillsboro at 6-7am today. From the look of the 12z GFS, fall is on it’s way with lots of rain and cool air over the next couple of weeks.

  21. Punxsutawney (aka HIO Phil at work by Sunset High ~280' elevation) says:

    Thanks for the info Sandi,
    It was really foggy in Hillsboro at 6-7am today. From the look of the 12z GFS, fall is on it’s way with lots of rain and cool air over the next couple of weeks.

  22. Punxsutawney (aka HIO Phil at work by Sunset High ~280' elevation) says:

    Thanks for the info Sandi,
    It was really foggy in Hillsboro at 6-7am today. From the look of the 12z GFS, fall is on it’s way with lots of rain and cool air over the next couple of weeks.

  23. Sandi (Wilsonville) says:

    My husband is a certified arborist so I asked him about the Fall colors, and he said that the cold nights and shorter days do contribute to the chlorophyll (green pigment) leaving the leaves and leaving behind the orange and red pigments. I was curious about this and did a little research on fall colors. Here’s a link:
    http://www.usna.usda.gov/PhotoGallery/FallFoliage/ScienceFallColor.html
    and here’s a paragraph pulled from that article:
    Temperature, sunlight, and soil moisture greatly influence the quality of the fall foliage display. Abundant sunlight and low temperatures after the time the abscission layer forms cause the chlorophyll to be destroyed more rapidly. Cool temperatures, particularly at night, combined with abundant sunlight, promote the formation of more anthocyanins. Freezing conditions destroy the machinery responsible for manufacturing anthocyanins, so early frost means an early end to colorful foliage. Drought stress during the growing season can sometimes trigger the early formation of the abscission layer, and leaves may drop before they have a chance to develop fall coloration. A growing season with ample moisture that is followed by a rather dry, cool, sunny autumn that is marked by warm days and cool but frostless nights provides the best weather conditions for development of the brightest fall colors. Lack of wind and rain in the autumn prolongs the display; wind or heavy rain may cause the leaves to be lost before they develop their full color potential.

  24. Sandi (Wilsonville) says:

    My husband is a certified arborist so I asked him about the Fall colors, and he said that the cold nights and shorter days do contribute to the chlorophyll (green pigment) leaving the leaves and leaving behind the orange and red pigments. I was curious about this and did a little research on fall colors. Here’s a link:
    http://www.usna.usda.gov/PhotoGallery/FallFoliage/ScienceFallColor.html
    and here’s a paragraph pulled from that article:
    Temperature, sunlight, and soil moisture greatly influence the quality of the fall foliage display. Abundant sunlight and low temperatures after the time the abscission layer forms cause the chlorophyll to be destroyed more rapidly. Cool temperatures, particularly at night, combined with abundant sunlight, promote the formation of more anthocyanins. Freezing conditions destroy the machinery responsible for manufacturing anthocyanins, so early frost means an early end to colorful foliage. Drought stress during the growing season can sometimes trigger the early formation of the abscission layer, and leaves may drop before they have a chance to develop fall coloration. A growing season with ample moisture that is followed by a rather dry, cool, sunny autumn that is marked by warm days and cool but frostless nights provides the best weather conditions for development of the brightest fall colors. Lack of wind and rain in the autumn prolongs the display; wind or heavy rain may cause the leaves to be lost before they develop their full color potential.

  25. Atmospheric Wrath -Far S.E. Portland- says:

    [Surface gradients]
    As of 7 AM
    PDX-DLS: -1.2
    TTD-DLS: -1.8
    Some light offshore trying to kick up.

  26. Atmospheric Wrath -Far S.E. Portland- says:

    *Correction*
    This low is projected to deepen to 980-985mb*
    If there is a 2nd low to develop along the bottom side of the trough axis this one could be the one to watch. It would likely be inside 130 W and in a very favorable N-S trajectory right up the Coast. I noticed models have at times shown a 2nd low deepening it to 970-975mb (perhaps further?) We shall see.

  27. Atmospheric Wrath -Far S.E. Portland- says:

    8km WV Loop Enhanced
    http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?wv_enhanced+12
    I created a zoomed WV map based off this

    [My Analysis]
    System developing near 36 N, 140 W. Models right now show the low riding NE towards 131-133 W along the boundary offshore. It is now projected to deepen to 970-975mb. Left exit jet still shown as weak so a wind storm threat is unlikely. However given initialization and development this far south we do need to keep an eye on this as a favorable SW-NE or S-N trajectory could occur. It does look like ultimately the ridge inland is too strong to allow this boundary to push much eastward thus not a high probability of the low drifting inside of 130 W.
    [06z NCEP/NOAA forecast map]

    Shows the low around 1018mb probably a few mb lower now. Projected to move NE along the boundary to about 132 W and deepening to 992mb. The ridges inland are going to decide this lows fate and exactly how much or how little impact it gives us. I did look at the 06z NCEP model and it again shows any low remaining outside of 130 W with a weak exit jet as well. 00z WRF-GFS kept the best gradient and strongest southerlies offshore with perhaps 15-25+mph inland. I am however eager to see the 12z runs later to see how they are handling this situation. As much as it pains me to say (for those that know me LOL) I am fairly positive models do have a good handle on things though.

  28. Atmospheric Wrath -Far S.E. Portland- says:

    Sorry try this link for the zoomed image

  29. Atmospheric Wrath -Far S.E. Portland- says:

    Good morning
    Luvry, it was a rolled foot/ankle.
    I went to ESPN.com and carefully looked at the video replay. I also froze it and took screen shots. The X-ray was inconclusive; Oden will have an MRI exam back in Portland Wednesday. I feel so bad for the young man.
    This pic is the overall play unfolding.

    You can see the play unfolding and a very bad sight.
    Next I created a zoomed image as well as another view of it.
    http://tinypic.com/view.php?pic=b6oe8p&s=4
    You can really see just how far it rolls over. This looks gruesome and we can only hope for the best.
    Weather post coming next.

  30. Atmospheric Wrath -Far S.E. Portland- says:

    Good morning
    Luvry, it was a rolled foot/ankle.
    I went to ESPN.com and carefully looked at the video replay. I also froze it and took screen shots. The X-ray was inconclusive; Oden will have an MRI exam back in Portland Wednesday. I feel so bad for the young man.
    This pic is the overall play unfolding.

    You can see the play unfolding and a very bad sight.
    Next I created a zoomed image as well as another view of it.
    http://tinypic.com/view.php?pic=b6oe8p&s=4
    You can really see just how far it rolls over. This looks gruesome and we can only hope for the best.
    Weather post coming next.

  31. luvry (Aloha) says:

    Sure as heck looked like a rolled ankle to me in the replays, my best thought is that it’s nothing major. I rolled many ankles just like that…so stay positive all. He’ll be all good.

  32. EA_TTD says:

    I too am excited about the Blazers. Appointment viewing for the first time since the 2000 season, meaning that I will plan my evenings around games. That said, we are a young team that will need time to grow and gel together. Anything above a 7 or 8 seed would be surpassing my expectations. I think that as the season tips tonight, we could all stand to ramp down our expectations just a little. By the looks of some comments, we’re one blown ACL…EDIT: (or foot) away from a Prozac outbreak reminiscent of the winter of 2007-08.
    Posted by: EA_TTD | Tuesday, October 28, 2008 at 02:32 PM

  33. EA_TTD says:

    I too am excited about the Blazers. Appointment viewing for the first time since the 2000 season, meaning that I will plan my evenings around games. That said, we are a young team that will need time to grow and gel together. Anything above a 7 or 8 seed would be surpassing my expectations. I think that as the season tips tonight, we could all stand to ramp down our expectations just a little. By the looks of some comments, we’re one blown ACL…EDIT: (or foot) away from a Prozac outbreak reminiscent of the winter of 2007-08.
    Posted by: EA_TTD | Tuesday, October 28, 2008 at 02:32 PM

  34. Justin/ KVUO snowman says:

    Bad game.
    Ryan, to be fair, we’ve had several good thunderstorm producers this year. 2008 has been one of the most prolific thunderstorm years I can remember for this climate.

  35. Justin/ KVUO snowman says:

    Bad game.
    Ryan, to be fair, we’ve had several good thunderstorm producers this year. 2008 has been one of the most prolific thunderstorm years I can remember for this climate.

  36. Atmospheric Wrath -Far S.E. Portland- says:

    All I can think of is how so many big men in the game have had foot problems…. Oden couldn’t even make it through one half of a game with this potentially troubling problem now.
    This cannot bode well… Hoping for the best.
    Besides that we looked nervous, afraid, confused, and unprepared…. Even if we lost I wanted to take away some positives from the game. I can’t think of any at the moment. Rudy make some good shots? :/
    Back to weather.
    00z NCEP GFS run still shows a deepening low offshore Saturday night/Sunday. It appears the 00z intensified the low even further down to 974-976mb. It still looks to remain outside of or near 130 W and moving well north out of harms way. Also the left exit jet still looks weak so no wind storm threat.

  37. Atmospheric Wrath -Far S.E. Portland- says:

    All I can think of is how so many big men in the game have had foot problems…. Oden couldn’t even make it through one half of a game with this potentially troubling problem now.
    This cannot bode well… Hoping for the best.
    Besides that we looked nervous, afraid, confused, and unprepared…. Even if we lost I wanted to take away some positives from the game. I can’t think of any at the moment. Rudy make some good shots? :/
    Back to weather.
    00z NCEP GFS run still shows a deepening low offshore Saturday night/Sunday. It appears the 00z intensified the low even further down to 974-976mb. It still looks to remain outside of or near 130 W and moving well north out of harms way. Also the left exit jet still looks weak so no wind storm threat.

  38. Ryan (Walnut Grove) says:

    It seems Portland/Pacific Northwest is pretty about getting the right types of systems at the wrong time of year. I remember a couple great systems in May that would have been big snow producers in Jan/Feb. Now we have a great T-Storm producer had it rolled through a few months earlier.

  39. Ryan (Walnut Grove) says:

    Forward from the previous blog entry:
    We learned two things tonight…
    #1 – The Lakers are THAT good.
    #2 – The Blazers have a LONG way to go.
    Let’s hope Oden isn’t injured again. He’s spent the entire 3rd quarter in the locker room getting X-Rays of his foot. Please don’t let us have Sam Bowie 2.0.
    Alas nothing interesting in the weather department here.

  40. HIO Phil (Punxsutawney) says:

    Err..Third, took too long.

  41. HIO Phil (Punxsutawney) says:

    2nd – And it gets worse for the Blazers so I thought I’d check the blog.
    And anyway 45.2 DP 40. Maybe some fog in the morning.

  42. Boring Larry in Cherryville el.918 says:

    second…um…it’s 44.2 out…

  43. Mback (TTD) aka Weather Nerd #6 - Missed the Fab 5 by 1 says:

    First and I don’t know what else to say.