December 2023 Weather in the PNW

[MR.SNOWMIZER]

4.58 rain today 7.04 month. This is nuts.

[ShawniganLake]

 

 

[Winterdog]

Heck with the Euro and the GFS, I’m going with my Davis Forecast.

[TigerWoodsLibido]

Some heavy precip rates could make things interesting...

[snow_wizard]

At least the 0z GF and GEFS are trending a bit chillier after the AR again.

[Cascadia_Wx]

Really nothing notable here the last few days but a lot of nasty warmth.

58/45 yesterday with morning rain then cloudy and drizzly much of the daylight and evening hours. 63/51 today, overcast with drizzle at times and balmy.

[Cascadia_Wx]

Is it seriously 67 at PDX right now? F*cked up.

[snow_wizard]

Speaking of chillier.  Check out this ridiculous change on the 0z ECMWF vs the 12z.

[snow_wizard]

1 minute ago, Cascadia_Wx said:

Is it seriously 67 at PDX right now? F*cked up.

Kind of seems like something that might be made up for.

[snow_wizard]

This makes me feel much better.  I hated the last few model runs before this.  Right now the models are struggling with how strong the current MJO wave will be as it moves through the Maritime Continent and on to regions 6 and 7.  The part of the circuit that has big implications for cold in the NW.

[Front Ranger]

31 minutes ago, MR.SNOWMIZER said:

4.58 rain today 7.04 month. This is nuts.

Crazy how much more rain you've gotten than places like OLM and Shelton.

[Cascadia_Wx]

7 minutes ago, snow_wizard said:

Kind of seems like something that might be made up for.

Maybe this is just making up for our mildly notable late November chilly spell.

[Rubus Leucodermis]

2.80" on the day and 53.6˚F.

[Front Ranger]

11 minutes ago, Cascadia_Wx said:

Is it seriously 67 at PDX right now? F*cked up.

Wow. All-time record for December there?

[the_convergence_zone]

Judging by the radar and the current rain rate, I’m going to wake up to a storm total approaching 3”. 

[the_convergence_zone]

15 minutes ago, Cascadia_Wx said:

Is it seriously 67 at PDX right now? F*cked up.

It’s just an urban heat island from all the sun hitting the pavement, no biggie. 

[Front Ranger]

Looks like Troutdale hit 69 or maybe 70. I believe this beats the December record of 68 from 12/26/80.

[Deweydog]

Fun night! 

Feels totally bizarre out.

[Cascadia_Wx]

1 minute ago, Deweydog said:

Fun night! 

Feels totally bizarre out.

Thank you for showing everyone the proper and inherently superior way to experience this.

[Rubus Leucodermis]

Not really a big surprise. Climates that can reach the 110's in summer can usually manage 70's in the winter.

[Front Ranger]

9 minutes ago, the_convergence_zone said:

Judging by the radar and the current rain rate, I’m going to wake up to a storm total approaching 3”. 

Yeah, rates have picked up significantly in the Puget Sound region over the past couple hours and radar still looks to be intensifying. 

My previous statement regarding SEA precip may have been premature...while it's not looking like an October 2003 type deal, 2-4" across much of the Seattle to Olympia corridor within 36 hours now looks doable, which is definitely notable.

[Requiem]

Wacky situation AT PDX-- there is also an off-chance that they rack up some fairly impressive 24-hour totals from the coming AR. 

[Deweydog]

Just now, Requiem said:

Wacky situation AT PDX-- there is also an off-chance that they rack up some fairly impressive 24-hour totals from the coming AR. 

Definitely benefiting from the earlier switch to easterlies. Perfect amount of adiabatic help amidst the mid level drying. Dynamic system!

[Front Ranger]

2 minutes ago, Rubus Leucodermis said:

Not really a big surprise. Climates that can reach the 110's in summer can usually manage 70's in the winter.

Here in Denver, our all-time high is 105 but we've hit the 70s on many occasions in the winter, going back many decades.

Hell, in 1955 Denver hit 70+ three straight days leading up to Christmas.

[The Winter Warlock]

Who turned on the fire hydrant?

[Deweydog]

5 minutes ago, Cascadia_Wx said:

Thank you for showing everyone the proper and inherently superior way to experience this.

[Rubus Leucodermis]

Rain has stopped. Radar shows more coming, but it won’t be here before midnight, so 3-incher denied.

[the_convergence_zone]

3 minutes ago, Front Ranger said:

Yeah, rates have picked up significantly in the Puget Sound region over the past couple hours and radar still looks to be intensifying. 

My previous statement regarding SEA precip may have been premature...while it's not looking like an October 2003 type deal, 2-4" across much of the Seattle to Olympia corridor within 36 hours now looks doable, which is definitely notable.

The models tend to underestimate warm rain processes and the precip totals can sometimes go berserk in the core of the AR. 

I’ve gotten an inch of rain in just the past 4.5 hours! 

[SnowWillarrive]

Will need high temps in the teens for two weeks in order to offset this warmth. 

[Front Ranger]

3 minutes ago, the_convergence_zone said:

The models tend to underestimate warm rain processes and the precip totals can sometimes go berserk in the core of the AR. 

I’ve gotten an inch of rain in just the past 4.5 hours! 

There are parts of the Olympics that could end up seeing 12"+ out of this.

[MR.SNOWMIZER]

41 minutes ago, Cascadia_Wx said:

Is it seriously 67 at PDX right now? F*cked up.

Fukin tired of this . 

[the_convergence_zone]

Quillayute has secured the rare 4 inch day. 

Lake Quinault is gunning for an 8 inch day but likely to come up just short. 7.4” as of 11 and it’s been raining around 0.5”/hr lately. 
 

Sea-Tac made a nice run at the daily record of 1.41” but it looks like they will fall about a tenth short. Tomorrow’s record of 1.67” has a decent chance to fall. 

[MR.SNOWMIZER]

Up to 5.4 inches of rain. It it just pouring, some of the hardest sustained rain I've ever seen here.

[the_convergence_zone]

2 minutes ago, MR.SNOWMIZER said:

Up to 5.4 inches of rain. It it just pouring, some of the hardest sustained rain I've ever seen here.

What’s your wind direction? I’m out of the SE here. Not sure how close you are to any mountains but I wonder if you’re getting some influence from upsloping? 

[Rubus Leucodermis]

18 minutes ago, Deweydog said:

Definitely benefiting from the earlier switch to easterlies. Perfect amount of adiabatic help amidst the mid level drying. Dynamic system!

[TacomaWx]

Hour #20 working here and our systems are slowly losing the battle to keep up. It’s raining really hard here in snoqualmie. 

[jcmcgaffey]

9 minutes ago, the_convergence_zone said:

Quillayute has secured the rare 4 inch day. 

Lake Quinault is gunning for an 8 inch day but likely to come up just short. 7.4” as of 11 and it’s been raining around 0.5”/hr lately. 
 

Sea-Tac made a nice run at the daily record of 1.41” but it looks like they will fall about a tenth short. Tomorrow’s record of 1.67” has a decent chance to fall. 

I’m in the northern part of Seattle and over 2”. 

[Front Ranger]

1 minute ago, TacomaWx said:

Hour #20 working here and our systems are slowly losing the battle to keep up. It’s raining really hard here in snoqualmie. 

D**n, I imagine you have to be off soon? What are the consequences if your water treatment systems are unable to keep up?

[TacomaWx]

Just now, Front Ranger said:

D**n, I imagine you have to be off soon? What are the consequences if your water treatment systems are unable to keep up?

I hopefully can get off work in a few hours…but may have to work until late Tuesday or Wednesday. Overflowing is bad…would send dirty water into the raging river here in snoqualmie. We’re constantly moving water out of all the systems but the system I’m at can’t move the volume that we’re getting right now. 

[MR.SNOWMIZER]

8 minutes ago, the_convergence_zone said:

What’s your wind direction? I’m out of the SE here. Not sure how close you are to any mountains but I wonder if you’re getting some influence from upsloping? 

Yes I'm in a upslope area, same thing happens in certain snow events. I have a east wind at 5