East Wind Starting Up…

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Here’s a pic from Chanticleer Pt. right now…maybe a 20-25 mph wind..should be far windier the next 24 hours!  More later…Mark

9:30pm Update:

Gradient is picking up this evening, already approaching 6 millibars PDX-DLS (I suppose it would be -6 mb, but you get the idea).  One surprise, at least to me, is that it’s also a “downslope” wind this evening.  Wind is blowing in the areas that only get east wind when it comes off the Cascades.  That includes Battle Ground, the Lewis River Valley, Woodland, Sandy, Brightwood, Eagle Creek etc…

00z WRF-GFS shows 55-60 mph wind around the 2,000′ level over the Metro Area peaking around daybreak.  That’s impressive even in winter.

Gradient should peak during the morning hours tomorrow, then it just turns to a regular “Gorge Wind” tomorrow evening.

With such a strong wind, it’s going to be a very warm night, remaining in the 50s in the windy spots, maybe even near 60! 

No big changes in the longer term forecast…turning wet and cooler this weekend and beyond.  Interesting maps up around 10 days.  The 12z GFS had a cold pattern setting up around hour 240 or so, but now the 00z GFS has the ridge to our west much closer, giving us drier and mild conditions.  So now we can play the “10-Day Map Game” between now and March many more times…

Chief Meteorologist Mark Nelsen

93 Responses to East Wind Starting Up…

  1. Karl Bonner says:

    The biggest astonishment about this November heat wave is up in Seattle, which not only broke 70. Some localities hit the mid 70s – unprecedented given how far north they are. I’m going to assume that downsloping winds were responsible there, too.

    If that had happened 200 miles further south, I bet a few spots would hit 77 or 78!

  2. I think I might see the sun today after all. The fog appears to be clearing out. Currently 47° and calm.

  3. Ryan (Walnut Grove) says:

    We must have a lot of folks that live on the east side of town here. I almost never get any significant wind from an east wind event at my house (Van Mall area). Unless we have an exceptionally strong down slope event.

    Always fascinated by the volume of east wind posts and people noting how strong the wind is at their place. I look outside and see the occasional light breeze.

    • pappoose in scappoose says:

      Calm here, 41.

    • W7ENK says:

      I’m on the East side, but I’m in the same boat as you, Ryan… it’s been calm here all night. Peak wind gust here was 13.2 mph just after midnight. Looking out the windows this morning, the trees aren’t moving… at all. 😦

  4. Ryan (Walnut Grove) says:

    I should not be able to walk around in shorts and a T-Shirt at 6:30am at any point during the month of November.

    Looks like the GFS is locking into a cool but not cold solution with a ridge long term. Welcome back to the blah and boring from that model.

  5. Rob "Wrath" S.E. Portland says:

    Hmmm is the gradient going to increase further? Why do I suggest it is possible?

    Check out the 6z NCEP/NOAA Pacific Surface Analysis and 12z NCEP IR/Analyzed Fronts image.

    http://www.atmos.washington.edu/cgi-bin/latest.cgi?fronts-ir
    1040mb+ high over eastern Washington and a developing/deepening low moving northeast from 140 W towards 133 W. That could tighten the gradient further between this area of low pressure and much higher pressure over the Columbia Basin. It is something to keep an eye on I feel.

  6. Rob "Wrath" S.E. Portland says:

    Pressure Gradients
    [As of 6:00 AM]
    PDX-DLS: -8.8mb | 0.3mb Increase
    TTD-DLS: -8.5mb | 0.5mb Increase

    • It is blowing up at 800′ just west of Amboy. Something hit the house and we’ll know more when the sun comes up. Haven’t got a station up yet to find out how strong the winds are.

  7. k5mitch says:

    Lattice work just flew off the front porch…

  8. Rob "Wrath" S.E. Portland says:

    BIG gust just woke me up. My weather station shows a max gust of 43.7mph at 5:01 AM, so yep that’s the one that did it.

    4km Cross Section models shows the peak is now until around noon.

    Pressure Gradients
    [As of 5:00 AM]
    PDX-DLS: -8.5mb | 0.2mb Increase
    TTD-DLS: -8.0mb | 0.2mb Decrease
    *Gradient likely nearing their peak. In the 8mb+ range as I expected.

    Over 500 people without power now.
    http://www.portlandgeneral.com/safety_outages/outages/outage_updates/outage_list.aspx

  9. Josh in Puyallup says:

    Hey guys. I’ve always read this blog while living in Yacolt. Moved up to Puyallup about 3 months ago. I’m way stoked for this La nina. Always been a “weather nerd”. Still learning stuff though. It’ll be fun to compare my winter, to what happens for you guys.

  10. muxpux says:

    wow. 46 and calm here in Longview.

    and about 40 miles away in Vancouver, its 65.

    crazy.

  11. Karl Bonner says:

    Guess what happened just about 100 miles south of the OR/CA border today? Redding made it to 86 degrees with a stiff north wind (nothing like the east winds in the West Gorge, mind you – we’re talking a strong breeze in the teens and low 20s mph.). But if my memory is correct, Medford only made 73. Interesting how much difference there often is between the Rogue and Sacramento Valleys despite their relative promimity.

    The fact that winds were northerly means it wasn’t caused by some kind of hot subtropical desert air that hits Redding and then gets stopped by the Siskiyous – that would produce south winds instead. Instead it must be katabatic in nature, and that implies we could get almost as warm here in Oregon (maybe 78-82 instead?) if the topography were more conducive to the same kind of dry downsloping wind.

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