December 2015 in the Pacific Northwest

[Perturbed Member]

Yep... its destined for Medford it seems.

 

A lot of times these lows tend to come in a bit further north than modeled...well I'm just grasping at straws at this point. Marginal precip and marginal cold is not usually a good recipe for snow in PDX. Hopefully we get a decent transition event at the end of this.

[Gradient Keeper]

I just stumbled across this. I thought you guys(and gals?) would like this. I'd think this could play a major role in dislodging the PV and shoving a huge chunk of bitter air southward into Yukon, NWT. What say you? Is there any SSW going on at 10mb? or....

 

http://i.imgur.com/4PlNZIQ.jpg

[luvssnow_spokane]

I just stumbled across this. I thought you guys(and gals?) would like this. I'd think this could play a major role in dislodging the PV and shoving a huge chunk of bitter air southward into Yukon, NWT. What say you? Is there any SSW going on at 10mb? or....

 

http://i.imgur.com/4PlNZIQ.jpg

Phil??

[Gradient Keeper]

Phil??

Yeah, I'd love to know his thoughts. I'd assume temps up there 70 degrees below normal are a bit rare and could dramatically shake things up. Minor tweaks anyone?

[crf450ish]

I just stumbled across this. I thought you guys(and gals?) would like this. I'd think this could play a major role in dislodging the PV and shoving a huge chunk of bitter air southward into Yukon, NWT. What say you? Is there any SSW going on at 10mb? or....

 

http://i.imgur.com/4PlNZIQ.jpg

Dang.....sure glad I am stock piling pellets for my pellet stoves. Also just invested in one of those nifty Kohler automatic generator deals that kick on when the power goes out.....

[MossMan]

Sure does look like snow clouds currently looking out my window at work...too bad it won't amount to anything.

And holy crap, what a graphic from DJ!

[Deweydog]

I just stumbled across this. I thought you guys(and gals?) would like this. I'd think this could play a major role in dislodging the PV and shoving a huge chunk of bitter air southward into Yukon, NWT. What say you? Is there any SSW going on at 10mb? or....

 

http://i.imgur.com/4PlNZIQ.jpg

Lows in the 80's in SE Portland???

[epiceast]

So there's a cut off low on last two euro runs... Is it going to be completely dry? Also it forma over CA and tracks NNE or north. Seems very unusual to me, usually those things break off from a trough first.

[Timmy]

Lows in the 80's in SE Portland???

I think you must have read the legend wrong

[TT-SEA]

So there's a cut off low on last two euro runs... Is it going to be completely dry? Also it forma over CA and tracks NNE or north. Seems very unusual to me, usually those things break off from a trough first.

 

 

12Z ECMWF is totally dry with that cut-off.  

[Deweydog]

Temps falling through the 38's here.

[TT-SEA]

Temps falling through the 38's here.

Too much low cloudiness... need it to lift a little so it can freeze up here. Still 32.5 after a high of 34. The snow cover has compacted from 10 inches down to 7 or 8. Need to lock it down!

 

Wonderfully low dewpoints coming... always have that mush day waiting for it come.

[Deweydog]

Too much low cloudiness... need it to lift a little so it can freeze up here. Still 32.5 after a high of 34. The snow cover has compacted from 10 inches down to 7 or 8. Need to lock it down!

 

Wonderfully low dewpoints coming... always have that mush day waiting for it come.

I'm praying hard for your snow consistency!

[snow_wizard]

Amazingly the ECMWF weeklies show below normal 850mb temps over the NW for days 18 through 32.  Looks like we have a decent shot at a reasonably cool January.

[HighlandExperience]

I'm praying hard for your snow consistency!

 

 

your faith isn't strong enough. 

 

[TT-SEA]

Amazingly the ECMWF weeklies show below normal 850mb temps over the NW for days 18 through 32.  Looks like we have a decent shot at a reasonably cool January.

 

 

How did you think you would have kept any snow you got yesterday through today?  

 

Even if you got 3 inches... it would be gone now.     Don't feel bad about not having snow yesterday because you had no chance going into the inversion.

 

Not a fan of this type of day after snowfall but its most common. 

[Phil]

I just stumbled across this. I thought you guys(and gals?) would like this. I'd think this could play a major role in dislodging the PV and shoving a huge chunk of bitter air southward into Yukon, NWT. What say you? Is there any SSW going on at 10mb? or....

 

http://i.imgur.com/4PlNZIQ.jpg

No SSW yet, but there's a notable wave-1 push ongoing w/ a second round likely in mid-Jan. Eventually, the PV should get taken out later in the month.

[Phil]

Amazingly the ECMWF weeklies show below normal 850mb temps over the NW for days 18 through 32. Looks like we have a decent shot at a reasonably cool January.

Looks like most of the cold is focused over the East/Southeastern U.S. They look fairly Niñoish w/ a good -NAM signal.

[snow_wizard]

Looks like most of the cold is focused over the East/Southeastern U.S. They look fairly Niñoish w/ a good -NAM signal.

 

I agree it certainly looks like minus AO.  I was just talking about what the 850mb anomalies are shown to be over the NW.  Not bad at all with this kind of a Nino.

[stuffradio]

Even though we all know I love the warm weather for outdoor activities, the longer it can stay cooler the better so the snow pack lasts longer into the year.

[snow_wizard]

BTW...I don't buy for a minute it's going above freezing on the North Pole anytime soon.  ​

 

I suppose the mid levels could go that high, but no way at the surface.

[snow_wizard]

Even though we all know I love the warm weather for outdoor activities, the longer it can stay cooler the better so the snow pack lasts longer into the year.

 

Why would you like warm weather in the winter?  Yuck!

[Jesse]

Just got back from a very snowy hike in the Multnomah Creek Basin to Nesika Lodge. Beautful area up there with 6-8" on the ground at the 2,000' level. Slushy snow started at the Multnomah Falls trailhead and only got deeper from there.

 

MOS guidance has PDX hitting freezing tonight, but I'm not sure I'm buying it with all the lingering clouds.

[Jesse]

BTW...I don't buy for a minute it's going above freezing on the North Pole anytime soon. ​

 

I suppose the mid levels could go that high, but no way at the surface.

Yeah, definitely no surface temps above freezing up there this time of year.

[snow_wizard]

Just got back from a very snowy hike in the Multnomah Creek Basin to Nesika Lodge. Beautful area up there with 6-8" on the ground at the 2,000' level. Slushy snow started at the Multnomah Falls trailhead and only got deeper from there.

 

MOS guidance has PDX hitting freezing tonight, but I'm not sure I'm buying it with all the lingering clouds.

 

We definitely need to get this damp air scoured out.

[ShawniganLake]

How did you think you would have kept any snow you got yesterday through today?  

 

Even if you got 3 inches... it would be gone now.     Don't feel bad about not having snow yesterday because you had no chance going into the inversion.

 

Not a fan of this type of day after snowfall but its most common. 

2" here yesterday and it held up just fine with 38F and cloud cover this afternoon. 

[TT-SEA]

2" here yesterday and it held up just fine with 38F and cloud cover this afternoon. 

 

 

Not sure how.   There was 2 inches down in North Bend this morning but after a high of 37 with a dewpoint of 37...  there was not even a trace of it left this afternoon.

[ShawniganLake]

Not sure how.   There was 2 inches down in North Bend this morning but after a high of 37 with a dewpoint of 37...  there was not even a trace of it left this afternoon.

I guess it was just some pretty dense stuff.  Even the asphalt driveways still had about 1.5" left this afternoon.  Unfortunately the trees were all cleared off with the drizzle yesterday evening and last night. 

[Timmy]

The new gfs puts moisture just north of Portland tomorrow evening. Would be snow for me

[Timmy]

Wrf actually give me an inch tomorrow morning

[FroYoBro]

Looks like tomorrow should be a beautiful drizzly day for Portland. 

[ShawniganLake]

The WRF is showing a lot of showers over the San Juans and southern Vancouver Island later tonight.  Wonder if it might snow here! Currently 32.9F and cloudy. 

http://www.atmos.washington.edu/mm5rt/data/current_gfs/images_d3/ww_pcp24.24.0000.gif

[snow_wizard]

How did you think you would have kept any snow you got yesterday through today?  

 

Even if you got 3 inches... it would be gone now.     Don't feel bad about not having snow yesterday because you had no chance going into the inversion.

 

Not a fan of this type of day after snowfall but its most common. 

 

It does make me feel slightly better.  I thought the cold / dry air would take hold a little more quickly.

[Deweydog]

Looks like tomorrow should be a beautiful drizzly day for Portland.

Major deformation drizzle.

[snow_wizard]

The WRF is a notch colder with 925mb temps tonight and tomorrow as opposed to the 12z.

[SilverFallsAndrew]

Appears I have made it down to freezing...

[Gradient Keeper]

Hmmm, some decent clearing here and my temp dropped 2 degrees in 30 minutes.

[TT-SEA]

Not that anyone noticed, or cared, but we are now over 100k posts and today we hit the most users logged in since the site transition.

 

 

129 pages this month leading up to lots of lowland rain/snow mix and 1,000 foot snow levels!    

[MossMan]

Busy night on the forum, must be an epic inversion coming!

[Gradient Keeper]

So much for not making it to freezing tonight. Several locations in Gresham and near Powell Butte in SE PDX down to 33-34 now. There is a lot more clearing than expected.