Cold Weekend Ahead!

Skies are trying to clear out tonight, and eventually they will towards morning.  So another chilly night, some mid teens to lower 20s in the metro area.

But it appears that Saturday night will give us a perfect meteorological setup for the coldest night for most of us since 1998, maybe since 1990 in some spots.

1. Clear sky

2. Coldest air mass in at least 4 years

3. Low dewpoints = very dry air

4. Perfectly calm wind just above everywhere as east wind disappears in the Gorge.

5. Snow cover in some spots, especially Vancouver and then south of Salem.

Everything is just coming together just right for extreme cold.  Here are the temps I expect in our area.  Due to calm wind, I think PDX (airport) shouldn’t have any problem dropping quite low like much of the metro area.  In the past, PDX has often had trouble getting extremely cold because many times during a cold spell at least some east wind is blowing…stirring up the air just enough to take the edge off the cold.

MarkCold_ExpectedLowTemps

Bend sat around 10 degrees all day long with heavy snow at times.  When that frigid airmass dries out enough for clear skies tomorrow night, the snow cover will allow those temps to REALLY drop!

By the way, the last time PDX hit 10 degrees (or colder) was a 9 degree reading on February 5th, 1989…23 years!  During the 2009 cold wave we hit 12, 13, & 14.

Eugene last went below 10 degrees in 2009, below 5 degrees in December, 1990.  And the last time it went below zero at Eugene was during the cold spell in December 1972.  It dropped to -12!

Stay warm this weekend!

Here are the snow totals today…for archive purposes (next fall’s winter weather meeting)

MarkSnow_ValleyTotalsSouth

MarkSnow_ValleyTotalsSouth2

MarkSnowTotalsNorthMetroOnly

Chief Meteorologist Mark Nelsen

201 Responses to Cold Weekend Ahead!

  1. Dave in SW PDX (235') says:

    11.3° for my overnight low here in the Garden Home area of SW Portland. Currently 15.2°/DP10°.

    Looks like PaulB will be buying the next round (or two)! Холодно там!

  2. paulbeugene says:

    Am at EUG airport right now. Had -4F on my car therm that runs 3F too warm

  3. Steven says:

    Corvallis made it to 2.5 degrees just after sunrise! Brr!

  4. EY (Oak Grove) says:

    It’s going to sound stupid but…

    I’m going to miss these temps. Even without snow, just how incredibly cold we’ve gotten the last few days (and maybe one or two more to go) has really scratched that good winter itch of mine. It almost doesn’t matter if we don’t get much of anything else the rest of the winter… Historic, biting cold and snow recorded in December, I’m a happy camper. We’ve had two bouts of cold temps already, with the first one being a good cool snap at any time of year (compare it with all of last winter, for example.)

    I can now say that I’ve been outside (in a t-shirt no less) when the thermometer read sub-10 degrees. That’s something I don’t remember ever doing in my entire life. I can say I’ve now seen real blowing snow, even if it didn’t accumulate much where I live… Just sitting out there with a warm blanket and watching the snow get blown around like dust was just amazing.

    We’ve already had good winds out at Crown Point. Though there’s always room for improvement. Heck, we’ve even had a notable Pacific storm move in (though it mainly hit Seattle.)

    This has been a wonderful winter, in my eyes, already… And one of my favorite ones already in the last few years. That definitely makes up for the sub-par summer we had this year (yes, I didn’t like it almost at all and no, you’re not going to convince me otherwise.)

    The best part is that we’re only getting started… Enough time left for more snow chances, for another arctic snap, for some windstorms (both south and east wind ones) and plenty more model riding to carry everyone. Heck, our all time record low in Portland comes at the end of January and beginning of February… Maybe we could see some mind bogglingly low temps then too.

    Though knowing NW winters recently… We’ll have marginally cool events spattered amongst dreary, rainy days until February which will be another insanely dry February and a wetter and cool-feeling March. No wind events, no real snow chances (until March), no plants and flowers wanting to grow and no Spring until Summer. :P

    • JJ78259 says:

      I am sure there are a handful of people in Portland ready for it to warm up!

    • Margaret says:

      Couldn’t have said it better. I too like this much better than heat and humidity (it’s why I moved here). I’m hopeful for more fun before dreariness returns.

    • David B. says:

      It’s far less novel if you grew up sometimes waiting for the school bus on -20F mornings. (In New Mexico, believe it or not; it can get plenty cold in the Southwest if you’re at high elevations.) Still an interesting departure from the norm, but the frigid 1/2 mile walk home from the movies last night also served to remind me once again why I moved to a (normally) mild coastal climate.

  5. David B. says:

    Reached 16 on Bainbridge Island before clouds rolled in and put a damper on the radiational cooling. Impressively cold for being surrounded by salt water. -10 in Eugene sounds surreal. Bet they’ll send that sensor in for calibration just to verify it.

    • David B. says:

      Forecast discussion mentions chance of flurries later today and tomorrow, maybe even some light accumulations Monday night. Still a chance for us to see at least a little sticking snow with this one.

      Wonder how cold last night would have been with 8″ on the ground here.

  6. Sapo says:

    The chances of snow Monday night and Tuesday are currently looking good for NW Oregon and some parts of Washington. Most models are showing precipitation arriving later Monday and continuing through Tuesday morning. Anywhere far south of Portland is getting dry this time.

    • Andrew (Beaverton, OR) says:

      I agree, at this point its looking good for maybe a couple inches Starting early monday evening into Tuesday. Temperatures will remain cold enough for snow through at least most of the event at the lowest elevations.

    • David B. says:

      Overrunning is the rule rather than the exception when a Pacific front comes in to displace an arctic air mass. Which is not to say it always lasts a long time, just that there is usually at least some snow or ice involved.

  7. Marcustheweathernut says:

    Somebody with a good camera needs to take a picture of the sunrise it is amazing!!!!

  8. EY (Oak Grove) says:

    Looks like Horse Ridge bottomed out at -41 degrees. That’s just insane. How long has it been since anywhere in Oregon dipped that low?

  9. Andrew (Beaverton, OR) says:

    Got down to 8 here last night, its too bad we didnt have some snow cover going into this event in order to really maximize on these overnights lows like Eugene has. -10!! WOW!!

  10. AdamInAumsville says:

    Looks like I have bottomed out at 4 degrees. Eugene is -10!!

  11. JohnD says:

    16.2′ here in inner SWPDX @ 7:00 a.m. Was 14.5′ earlier.
    The Portland NOAA AFD was very compelling this morning. They think an extended period of accumulating light snow is possible for Portland Monday night into Tuesday. I wouldn’t be surprised if that includes a bulletin later on. Also the heavier “transition” storm Wed. night-Thurs. still up in the air. ‘Hope Mark corroborates the snow for Monday night-Tues.

  12. 7.7 degrees this morning. Would have been colder but high clouds have moved in.

    Should be a great sunrise!

  13. Roman~Snow-Zone-Monmouth, Elv. 223' says:

    3F now, wow what an experience for anyone in the northwest! Baby it’s cold outside!

  14. prairiedog says:

    Sitting at 8f so far. Been a long time since I’ve seen this in Oregon City. Hoping to squeeze out another degree out of this.

  15. dale says:

    it is down to 10 at Dayton

  16. Dave_in_Troutdale says:

    Wow! Horse Ridge was -40!!! I believe at that temp you can throw a cup of boiling water in the air and it will just evaporate and float away. I did this in Fairbanks one day when it was -45. Anyhow, -40 in Oregon is very impressive. I think the all-time low is -54. I wonder what the wind chill there was?!?!

  17. paulbeugene says:

    JUST SET ALL TIME LOW IN EUGENE…..-13F!!!!!!!!

  18. paulbeugene says:

    Unbelievable. -9F at EUG at this hour. Down to 8.9F on my thermometer in town.

  19. Josh Gardner says:

    16.7 in NW Gresham. Still cooling despite a easterly breeze

  20. EY (Oak Grove) says:

    Up to 18 at Portland from a low of 15.

  21. schmit44 says:

    130am: 7 degrees at Battle Ground Lake after a high of 29 today

    This is the coldest temperature ever at my weather station
    (2006-present)

    The old record was 9 degrees set in Dec 9 2009

    • Josh Gardner says:

      You’re in a perfect spot for cooling. Wouldn’t be surpassed if someone in or around BG goes to 0

  22. schmit44 says:

    Eugene hit -8. Fog has formed so that all she wrote. The second coldest temperature of all time there I believe.

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

    Dipped down to -13.0 at midnight. This is the coldest I’ve experienced so far in the area.

  24. Linda says:

    Currently 10 degrees here in Redland (east of Oregon City)…..challenging to keep my chickens and farm animals alive and well

  25. schmit44 says:

    12/7/2013 Oregon (All) Temperature Summary

    Warmest:
    High:41 at Gold Beach (US 1( 60 ft)
    Low: 31 at Brookings Airpor(459 ft)

    Coldest:
    High:-1 at ARBUCKLE MTN(5400 ft)
    Low: -40 at Horse Ridge (US (4160 ft )

    Largest Diurnal Change: 45 degrees
    Bly (OR 140 MP 5 (19/-26 ) (4350 ft )
    Horse Ridge (US (5/-40) (4160 ft)

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