December 2015 in the Pacific Northwest

[TT-SEA]

Yay! Glad it's the NAM.

 

ECMWF agreed.   

[FroYoBro]

PDX exploring uncharted territory, up to 14 inches for the month now.

Arctic blast end of January - start of February? 

[Deweydog]

Arctic blast end of January - start of February?

Has to be. I believe there has never been a weather event which was not followed up by an Arctic blast.

[TT-SEA]

Has to be. I believe there has never been a weather event which was not followed up by an Arctic blast.

 

 

At least within the standard 10-year window.  

[MossMan]

ECMWF agreed.

Good thing the GEM and GFS say screw you Euro and NAM!

[Bryant]

According to the new MM5 NAM... its going to even get close to supporting snow below 1,000 feet at the 925mb level tonight. Regardless of the timing of the moisture.

 

Or tomorrow.

 

Or all day Thursday.

The NAM has been showing a different tracking of the low for a while, nothing surprising.

[Deweydog]

At least within the standard 10-year window.

It's coming...

[GHweatherChris]

Dynamic little system, heavy hail here all of a sudden.

[MossMan]

Still raining but the temp has been on a slow and steady decline. Down to 36.

[Parksvillewx]

Snowing heavily in places just west of me like Port Alberni, Tofino and Ucluelet.

[epiceast]

The last 3 storms here dropped 2-3" of snow followed an hour or two of light rain. Turns the snow into that slop you're talking about. Makes it a real pain to take the dogs out for a long walk.

Yea I'm having the same problem here as well. If only I lived 50 miles to the north.

[TT-SEA]

The NAM has been showing a different tracking of the low for a while, nothing surprising.

 

 

Not really different... the low sits up near Vancouver Island for most the next two days then slowly sinks south.   ECMWF and GFS/WRF show the same thing.

[TT-SEA]

33 at Snoqualmie Pass!

 

Impressively cold air mass tonight.  

[snow_wizard]

It has turned to half snow here now with a temp of 36.

[Bryant]

Not really different... the low sits up near Vancouver Island for most the next two days then slowly sinks south. ECMWF and GFS/WRF show the same thing.

GFS bring the low further SW, could make a big difference for the far northern locations. No difference for your area though

[Front Ranger]

Has to be. I believe there has never been a weather event which was not followed up by an Arctic blast.

 

You have it backwards. There's never been an Arctic blast which was not preceded by a weather event.

[Deweydog]

You have it backwards. There's never been an Arctic blast which was not preceded by a weather event.

Either way it's gonna get really, really cold.

[SilverFallsAndrew]

The RPM goes crazy with foothills and lowland snow in western oregon.

[Timmy]

The RPM goes crazy with foothills and lowland snow in western oregon.

pics or it didn't happen

[MR.SNOWMIZER]

Blowing and drifting snow here, very dangerous evening. Gusting to 80 i guess.

[TT-SEA]

GFS bring the low further SW, could make a big difference for the far northern locations. No difference for your area though

 

 

OK... that makes sense.

[MR.SNOWMIZER]

shelton down to 34 already.

[TT-SEA]

It has turned to half snow here now with a temp of 36.

 

00Z WRF says this is about it for the night for King County.     

 

Its pretty much dry for us until tomorrow morning while wet most other places.

[MR.SNOWMIZER]

00Z WRF says this is about it for the night for King County.     

 

Its pretty much dry for us until tomorrow morning while wet most other places.

Have you looked at the radar? alot out there heading in.

[TT-SEA]

Have you looked at the radar? alot out there heading in.

 

 

Yeah... WRF shows all the stuff on the coastal radar sliding SE while the Seattle area is in the shadow.

 

Watch the precip loop for tonight on the WRF.     Here is a sample image for your enjoyment:

 

http://www.atmos.washington.edu/mm5rt/data/current_gfs/images_d2/pcp1.09.0000.gif

[MossMan]

Heavy rain, wind has really picked up, and temp at 36 currently.

[Bryant]

Yeah... WRF shows all the stuff on the coastal radar sliding SE while the Seattle area is in the shadow.

 

Watch the precip loop for tonight on the WRF. Here is a sample image for your enjoyment:

 

http://www.atmos.washington.edu/mm5rt/data/current_gfs/images_d2/pcp1.09.0000.gif

Looks good for Whatcom County potential

[SilverFallsAndrew]

Wrf showing massive snow amounts at my location.

[Parksvillewx]

New 4km WRF sure got pretty for my location.

 

[Timmy]

New 4km WRF sure got pretty for my location.

 

 

wa_snow48.48.0000.gif

Shows 8-10 inches for me. A little bullish I think

[Parksvillewx]

WRF gives most lowland spots at least some flakes in the air. Better then nothing 2 days before Xmas..

[Deweydog]

Sunday system a tad drier and precip onset moved until late morning Sunday, mitigating its effects.

[MossMan]

My wife said it was "half a**" snowing in Mill Creek a bit ago.

[TT-SEA]

Sunday system a tad drier and precip onset moved until late morning Sunday, mitigating its effects.

That system is your baby. Hope it works out!

[snow_wizard]

The WRF is finally beginning to show a bit of C-Zone moisture for King County Thursday night.  The fact it's showing any at all is a good sign.  I could still easily imagine the Central Puget Sound getting no snow at all from the entire event though.

[Deweydog]

That system is your baby. Hope it works out!

Something to actually track as opposed to all this smoke and mirror B.S. you Sounders enjoy so much.

[TT-SEA]

Got down to 32.2 here and snow is starting to stick and now its about over.   

[SilverFallsAndrew]

The wrf shows like 20 inches for my location. ... fascinating

[Timmy]

The wrf shows like 20 inches for my location. ... fascinating

I'm still trying to determine "my location" on the wrf

[FroYoBro]

The wrf shows like 20 inches for my location. ... fascinating

 

Hope Santa can make it to your house!