Wind Arrives Tonight

Snapshot_10A dramatic change in progress at this hour, although you sure can’t tell if you look out the window.  East wind is just arriving at the west end of the Gorge and will push out into the metro area by daybreak.   The pressure gradient through the Gorge from PDX-DLS has gone from +2.0 millibars (westerly) to -2.4 mb (easterly) at 11pm.  Models show a good 6-8 millibars by tomorrow morning, which should give us enough wind to wipe out the fog and low clodus in the metro area.  That should be the last of the gray skies for quite some time.  I put the image to the left in for your viewing.  It shows clearly how the Columbia Gorge wind really is a "gap" wind.  If you drive from Gresham to Sandy you’ll notice the east wind almost always disappears around Boring.  Same thing on a drive from E. Vancouver or Camas up to Battleground.  The wind remains close to the river, especially right where it exits the Gorge.  This also shows that when Battleground or Sandy gets a strong easterly wind, it’s clearly coming down off the Cascades, not coming around from the Gorge.

Pattern from tomorrow through day 7 at least has a sharp and strong ridge sitting just offshore of the West Coast.  Cold northerly flow remains well to the east into the middle of the country, but close enough to keep surface high pressure east of the Cascades.  This should give us a long period of gusty east wind and low dewpoints/relative humidity.  00z GFS is a little "waffley" on the ridge later next week, but ECMWF & GEM are more persistent with ridging.
One interesting question to be answered will be; is this the beginning of a many-week long "El Nino" pattern?   Or for the rest of the winter?  Or is it just a short intermission in our stormy winter?  Anyone have any ideas?  Mark

61 Responses to Wind Arrives Tonight

  1. kirk says:

    42.3 and clear here.

  2. Derek-West Gresham says:

    http://www.longpaddock.qld.gov.au/SeasonalClimateOutlook/SouthernOscillationIndex/SOIDataFiles/DailySOI1887-1989Base.txt
    SOI climbing again, should go positive tomorrow and continue to climb. Means western troughiness is WAY more likely than usual. Notice the negatives lately, also notice the ridge. Its a good forecasting tool.

  3. cnr van wa says:

    I mowed the lawn today in my shorts and t-shirt. It felt great. Amazing how warm 53F can feel in the dead of winter. Ask me to go out wearing that on a 53F September night and I’ll tell you no way.

  4. jake says:

    SERIOUS inversion down here around corvallis, im at 30 degrees and just 1200 ft above me it is 45 degrees, just crazy

  5. Tyler in Vancouver says:

    Seems to me the high pressure east of the mountains is working it’s way SE, so maybe the gradient stays around -6 or -7 mb overnight.
    After all of the wild weather we’ve had this winter, I’ve lucked out to be moving this weekend under sunny skies and mild temperatures, who would have thought a week ago (when we were in the teens and 20s) that it would be almost 60 today.
    Tyler

  6. Tyler in Vancouver says:

    I think we often see signs of spring and have a warm spell in January. At the same time, though, I can count numerous times where I remember seeing blue bells being covered in snow. Down to 33.7 here after a high of 57 degrees. Looks like we had just enough east wind to get rid of the inversion, but not enough to keep us cool.
    I talked to my mom in Yakima and she lives up on a ridge. All of downtown Yakima is in the clouds/fog, and she is above it in the sunshine and warmer temperatures.
    Tyler

  7. Sandi (Wilsonville) says:

    Beautiful, sunny day today in Wilsonville. We reached a high of 55°F and the E winds are reaching all the way down here. No fog :o)
    Bulbs are up in the yard and the Snowdrops and Primroses are blooming. My sons even got out and washed the car today.
    It seems that we typically on most years have a January thaw around the 3rd week. Is that a misconception in my memories, or does anyone know if statistics bear this out? Just curious. :o)

  8. Sandi (Wilsonville) says:

    I looked at the Bridal Veil link. How do you have winds of 21 with a gust of 21?
    Time Temp. Wind Wind Wind Quality
    Chill Direction Speed Control
    (PST) (f) (f) (mph)
    26 Jan 8:20 pm 38 28 ESE 21G21 OK

  9. Weatherer says:

    00z run is pretty interesting come day 7…although probably won’t happen given how inconsistent models have been over the past several days.

  10. Sam /N. Clark Co. says:

    Was just looking at Ski Tiger for some new fluff–Alyeska, AK has 3 ft. of new POW in the last 24–maybe some will drift down our way. lol.

  11. Sam /N. Clark Co. says:

    Hey Brian–meant nothing rude-dude–just answering Mark’s question on how long the nice weather was going to last! I like snow and cold too–that’s why I’m up on the Mt. every chance I get. It will come back–but not this weekend.

  12. AtmosphericWrath -Southeast Portland- says:

    This observation from Bridal Veil caught my attention.
    http://www.wrh.noaa.gov/mesowest/getobext.php?sid=UP112&table=1&banner=off
    Look at the noticeable increase.
    IMO the E wind could be really building in the Gorge within the next hour could see the TTD-DLS gradient increasing quite a bit.
    Of course I could be wrong, but nahhhhhhhhh.
    Rob

  13. AtmosphericWrath -Southeast Portland- says:

    TTD-DLS gradient -7.1mb
    http://wxweb.meteostar.com/meteogram/link_pdiff.shtml?choice=KTTD+KDLS
    Hmmm PDX NWS AFD says for tonight WILL KEEP WINDS JUST BELOW HIGH WIND FOR NOW referring to the E winds.
    Wonder exactly how windy it’s going to get.
    I’m thinking the TTD-DLS gradient will max from -8.7mb -10mb.
    Rob

  14. timmy - scappoose says:

    okay checked the weather station in scappoose. a high of 63.2 for today, its just a half mile from my house. we still have snow in places where the plows turned a corner or something. lol. only a peak gust of 12mph today, but i odnt care for wind anyways.

  15. timmy - scappoose says:

    pdx-dls gradient back up to 7.5

  16. JoeLO says:

    Spill the beans Jacob.

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