Snapshot A nice flow of cool polar maritime air is headed out of the Gulf of Alaska…into the Pacific Northwest.  A cold front is getting organized (slightly) around 130W right now.  It's actually more of a solid line of showers than a large area of solid precipitation.  This arrives over us mid-morning tomorrow.  The combination of the showers, cloud cover, and colder atmosphere arriving overhead should give us a very chilly day Thursday.  This is a "one-shot" deal for rainfall;  the rain is gone by tomorrow evening, replaced by a much drier northerly low-level flow.  This means more sunshine for Friday, and of course a chilly start Friday morning as well.

It still looks good for a frost most areas Friday night, at least for most areas that don't get frost tomorrow night.  Okay, I'll make a few predictions for lowest either Friday or Saturday morning:  HIO=27, PDX=34, VUO=30, TTD=32.  Anyone else want to take a stab at it?

We should get a pretty quick rebound of temps Saturday PM through Monday as 850mb temps rise and we get a little offshore flow.  Dry weather until at least Tuesday when westerly flow sags back down over the Pacific Northwest.  Right now next week's systems are looking pretty weak and nothing to write home about, although the Mark Nelsen Vacation Rule applies for next week.  Maybe a surprise storm?  Mark

197 Responses to

  1. luvry says:

    Don’t know if it’s been reported but here we go anyways.
    PDO UPDATE:
    September PDO was -1.55! very nice…
    PDO STATS:
    This is the 8th lowest reading since 1900.
    Top 10 Record low September PDO’s:
    1933: -2.28
    1950: -2.14
    1961: -2.01
    1955: -1.95
    1948: -1.74
    1970: -1.67
    1962: -1.58
    2008**: -1.55
    1999: -1.53
    1928: -1.41
    NOTICE ANYTHING? All of the 7 colder years were 1970 or before J

  2. luvry says:

    Don’t know if it’s been reported but here we go anyways.
    PDO UPDATE:
    September PDO was -1.55! very nice…
    PDO STATS:
    This is the 8th lowest reading since 1900.
    Top 10 Record low September PDO’s:
    1933: -2.28
    1950: -2.14
    1961: -2.01
    1955: -1.95
    1948: -1.74
    1970: -1.67
    1962: -1.58
    2008**: -1.55
    1999: -1.53
    1928: -1.41
    NOTICE ANYTHING? All of the 7 colder years were 1970 or before J

  3. wendy-silverlake,wa says:

    Sunday October 19th, Accuweather has the first snow listed in my area. I don’t remember what the dates were, but I know there was a bet going a bit ago about when accuweather would start putting snow in the forecast.

  4. wendy-silverlake,wa says:

    Sunday October 19th, Accuweather has the first snow listed in my area. I don’t remember what the dates were, but I know there was a bet going a bit ago about when accuweather would start putting snow in the forecast.

  5. Boring Larry in Cherryville el.918 says:

    …fairly benign around here so far, a couple moderate showers, a lot of tree drip, and 41.9 staying pretty steady….

  6. Boring Larry in Cherryville el.918 says:

    …fairly benign around here so far, a couple moderate showers, a lot of tree drip, and 41.9 staying pretty steady….

  7. Tyler in Vancouver says:

    Phil…or anyone in HIO—The Hillsboro Airport was reporting winds to 29 mph around 6 pm. I don’t think anyone/anywhere else has experienced this today. Can anyone verify?

  8. Tyler in Vancouver says:

    Phil…or anyone in HIO—The Hillsboro Airport was reporting winds to 29 mph around 6 pm. I don’t think anyone/anywhere else has experienced this today. Can anyone verify?

  9. HIO Phil (Punxsutawney) says:

    I saw hail on the ground in the area around Fox Studios on the way home. There was some hail mixed in with the rain out here in Hillsboro. From the look of the clouds, it wouldn’t surprise me if someone in the area sees a cold air funnel.
    High of 53.3 here today.

  10. TriforceofInvisbilty says:

    Okay you win. 34F it is for HIO. (everyone cheers)
    I am sitting at 50F and clouds are thickining up again: Had a brief but heavy shower at 4:00ish,temps went from 55F to current in 10mins.
    In response to Cherie’s comment about Indonisa: Mark could tape a weeks worth of weather segments and will only be slightly off, Give or take an hour for the thunderstorms to fire up

  11. TriforceofInvisbilty says:

    Okay you win. 34F it is for HIO. (everyone cheers)
    I am sitting at 50F and clouds are thickining up again: Had a brief but heavy shower at 4:00ish,temps went from 55F to current in 10mins.
    In response to Cherie’s comment about Indonisa: Mark could tape a weeks worth of weather segments and will only be slightly off, Give or take an hour for the thunderstorms to fire up

  12. umpire says:

    There’s also a winter weather advisory for the Bend area. And, check out the road cams for Mt. Hood and Willamette pass – the temp at Hood is 29, and in the weird light it looks like snow is falling. Willamette pass has snow on the side of the road.

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

    Zoomed radar of the hail storm in Beaverton

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

    Zoomed radar of the hail storm in Beaverton

  15. yevgeniy.beaverton says:

    hailstorm 08!! here in beaverton!

  16. yevgeniy.beaverton says:

    hailstorm 08!! here in beaverton!

  17. yevgeniy.beaverton says:

    hailstorm 08!! here in beaverton!

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

    Nice heavy and isolated showers have developed over the west side of PDX.

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

    Nice heavy and isolated showers have developed over the west side of PDX.

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

    Nice heavy and isolated showers have developed over the west side of PDX.

  21. SnowFlake (Tigard/Bull Mtn) says:

    Gettin’ a bit of hail here in Tigard….

  22. HIO Phil (Punxsutawney) says:

    Uh-oh, …looks like it made it to 54 in Hillsboro as well, so only a tie with the old record today.

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

    46.8 mostly cloudy.
    Temps are slowly dropping as we head into the evening hours.
    If only we could clear out tonight by say 11:45 PM – 12:45 AM… Probably won’t happen and will have to wait until tomorrow night for temps near/below freezing.

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

    46.8 mostly cloudy.
    Temps are slowly dropping as we head into the evening hours.
    If only we could clear out tonight by say 11:45 PM – 12:45 AM… Probably won’t happen and will have to wait until tomorrow night for temps near/below freezing.

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

    46.8 mostly cloudy.
    Temps are slowly dropping as we head into the evening hours.
    If only we could clear out tonight by say 11:45 PM – 12:45 AM… Probably won’t happen and will have to wait until tomorrow night for temps near/below freezing.

  26. Andrew Johnson (Silverton) says:

    Saw the high at PDX was 55 and 54 at Salem. Which according to my research both tied record low-highs

  27. Andrew Johnson (Silverton) says:

    Saw the high at PDX was 55 and 54 at Salem. Which according to my research both tied record low-highs

  28. wendy-silverlake,wa says:

    40.4……Just think, in 2 months this will seem like a heat wave and we’ll all want it to go down 8 degrees for snow.

  29. wendy-silverlake,wa says:

    40.4……Just think, in 2 months this will seem like a heat wave and we’ll all want it to go down 8 degrees for snow.

  30. Andrew Johnson (Silverton) says:

    48 and partly cloudy here

  31. Andrew Johnson (Silverton) says:

    48 and partly cloudy here

  32. Andrew Johnson (Silverton) says:

    48 and partly cloudy here

  33. PrivatePilotWA - Castle Rock, WA says:

    Our high today was 48.8, low 33.6 and currently 44.9.Brrrrrrrrrrrrr.

  34. PrivatePilotWA - Castle Rock, WA says:

    Our high today was 48.8, low 33.6 and currently 44.9.Brrrrrrrrrrrrr.

  35. wendy-silverlake,wa says:

    Now down to 42.6. Rains over, but temps still dropping. Ground is still fairly white.

  36. wendy-silverlake,wa says:

    Now down to 42.6. Rains over, but temps still dropping. Ground is still fairly white.

  37. wendy-silverlake,wa says:

    Now down to 42.6. Rains over, but temps still dropping. Ground is still fairly white.

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

    I dropped down to an impressive 45.7!

  39. wendy-silverlake,wa says:

    Oops, forgot the temp. Now 44.3 degrees.

  40. wendy-silverlake,wa says:

    Oops, forgot the temp. Now 44.3 degrees.

  41. wendy-silverlake,wa says:

    Winds, hail, downpours, temp drop = exciting!!!!!!!!!
    Ground looks like the cam in Anchorage. Temp dropped 7 degrees during the fun. Only lasted about 3 minutes.

  42. wendy-silverlake,wa says:

    Winds, hail, downpours, temp drop = exciting!!!!!!!!!
    Ground looks like the cam in Anchorage. Temp dropped 7 degrees during the fun. Only lasted about 3 minutes.

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

    47.8 and the heavy shower is going to nail me.

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