PNW Weather Discussion - December to Remember 2025

[RentonHill]

6 minutes ago, Meatyorologist said:

Ensembles go out to just shy of MLK day. You can see what I mean with the NW flow then ridging building. The ridging really wants to evacuate west the moment it forms, even on the EPS. GEFS is crazy and doesn't even extend the ridging onto the west coast before pulling it into AK. We'll see in future guidance whether it's really in that much of a rush. 00z AI Euro OP concurs with these same themes. Euro extended and GEFS extended runs lean classic -PNA signature for the final third of the month, which while very far out, would still be a logical move forward in the weather pattern from a +PNA ridging starting point... Take that information as you will

00z

 

[Meatyorologist]

1 minute ago, RentonHill said:

00z

 

Wow that AI EPS looks really promising. If it's really leading the way then the next week could be active on the forums

[Low Dew point]

4 hours ago, BlvuSumit said:

Socked in now!

Here's mine.. Crazy what our phone cameras can do at night.

[Low Dew point]

3 hours ago, Gradient Keeper said:

I'm not sure if it's this way where you guys live, but the past several New Year's Eve there has been more illegal fireworks than during the 4th of July.

It's odd here this year.  It's eerily silent outside.  That coupled with the fog is super ghoulishly peaceful.  I don't miss the fireworks.

[Low Dew point]

1 hour ago, Meatyorologist said:

Looking at ensembles tonight I'm predicting a three act January.

1st 1/3rd, 1/1-1/10: Cool ridging/fake cold gives way to cool NW flow and an increase in storminess. Wind risks, popcorn convection, brief AR's/strong fronts, ect. Maybe even some marginal overrunning snow in spots.

2nd 1/3rd, 1/11-1/20: Ridging re-enters the area. Fake cold builds as the ridging builds within the last month of inversion season. Could be the first sub 40F highs at KSEA.

Last 1/3rd, 1/21-1/31: Retrogression into cold arctic air. Snow for the metro areas. Subfreezing highs. Arctic blast.

Let's see how I do in the next thread. I'm being intentionally bullish on the last third. Will be really cool if I'm correct. Obviously an uninterrupted ten day long blast is unlikely but an intrusion within that timeframe seems highly plausible, and that's what I'm trying to get at here, not a 1/1969 redux. Though that would also be cool.

Had a high of 37.6 today.  By far the coolest of the season to date. And, it felt seasonal.  I am finally feeling like I am acclimating to cooler temps.  40 was feeling raw!

[Poulsbo Snowman]

Bye 2025.

[KeyPeninsula_Wx]

 

[BlvuSumit]

[Phishy Wx]

I had a vision last night while hallucinating that we would partially salvage this shiit winter with a region wide major 2' snow in late January

 

HNY!!!

 

 

also last night we had police helicopters flying around until 3am trying to get the fireworks to stop, it would for like a minute and start right back up, helicopters again, rinse/repeat, kept going until sunrise.  nuts .  use to get that when we lived down in CA in Long Beach.  never seen that here.  crazy

[Cloud]

Hilariously the Space Needle boasted “the greatest New Year show in North America” —only to be said nope by the fog. Welcome to the PNW.