PNW December 2022 - Part II

[Ice_is_Everywhere]

Just now, MillCreekMike said:

Monroe

Mildly jealous

[Poulsbo Snowman]

Front must be close by.  Temps dropped 5 degrees in 30 minutes.  Now, 35 with a dewpoint of 29.  Still light rain I think.

[snow_wizard]

I'm liking the fact the ECMWF was too warm for Whatcom County.  It might be underestimating this.

[TacomaWx]

5 minutes ago, snow_wizard said:

Arctic front making good progress now.  Well into King County.

Nice to see it’s gotten that far south! 

[Ice_is_Everywhere]

Nothing on the radar yet, but clouds are getting more noticeable here.

[SilverFallsAndrew]

When I was in NE Oklahoma during the December 2007 ice storm temps were around 20 and I believe 850mb temps were +18c at one point. 

[MossMan]

This sums up the day. Some snow, some sun. It’s also my current view. 
31.6 

[snow_wizard]

It appears the real continental stuff has made it south of Mount Vernon now.  Looking good.

[Rubus Leucodermis]

1 hour ago, North_County said:

Sorry, one more. This is maybe 5 miles "upwind" from my house, on the Canadian side. This has some teeth.

Just as glad to have more snow and less wind.

[Perturbed Member]

The other sign that the GFS is starting to recognize the greater depth of cold air in gorge outflow areas is the ice map. GFS pretty much is showing no ZR in PDX now and that precip instead falls as 1-2 inches of snow and some amount of sleet. The areas away from the gorge still get ZR though due to shallower cold air. 

 

This snow map is looking a bit more like the UKMET too

This GFS map includes sleet as well in the snow total. 

[Hawksfan2008]

This looks like a 384 hour GFS…

[bainbridgekid]

OT but I leave for Chicago tomorrow and would be bummed to miss what will likely be a very fun week here, but both the GFS and Euro now give them one of their biggest snowstorms in years Thursday. 18z GFS goes crazy with over 2 feet.

 

[snow_wizard]

No doubt the 12z ECMWF was too anemic with the cold push.  Bodes well for Tuesday.

[KingstonWX]

7 minutes ago, Poulsbo Snowman said:

Front must be close by.  Temps dropped 5 degrees in 30 minutes.  Now, 35 with a dewpoint of 29.  Still light rain I think.

Snowing pretty good here in Kingston so you should turn over soon.

[MossMan]

30.9! 

[Brian_in_Leavenworth]

19 minutes ago, Timmy said:

Kuchera is overused and rarely comes to fruition.

Not true at all where I live.  We often have snow ratios in excess of 15:1 and the traditional 10:1 is useless.  NWS Spokane uses it 

[SnowySeeker50]

Shower moving overhead has some snowflakes mixing in.

[The Cats Meow]

rain snow mixc in the puyallup valley

[Rubus Leucodermis]

With the exception of a 20 minute period, it's been snowing nonstop IMBY since before daybreak. But mostly a snizzle with very little accumulation since late morning. About 3".

[VancouverIslandSouth]

3 minutes ago, snow_wizard said:

It appears the real continental stuff has made it south of Mount Vernon now.  Looking good.

It doesn't seem to be having much trouble slipping south at all. I've seen it get hung up at Bellingham so many times. Today it's racing south. It dropped from 33F to 28.5F here over the past couple hours, looks like it took about 1~2 hours to cross the Strait.

[HoodCanalBridge]

Really coming down now!  No stickage yet but looks like a snowglobe.  Going to make a fun trip to beer league hockey soon!

[Front Ranger]

5 minutes ago, bainbridgekid said:

OT but I leave for Chicago tomorrow and would be bummed to miss what will likely be a very fun week here, but both the GFS and Euro now give them one of their biggest snowstorms in years Thursday. 18z GFS goes crazy with over 2 feet.

 

Gonna be a white Christmas for a large part of the country this year.

[TT-SEA]

Big difference in high temps tomorrow between the GFS and ECMWF...

 

[NWbyNW]

Snow and flurries up north.  Rain in Oregon.

Let's take a peak at the convergence zone around Everett.  Snowing quite good in places, especially towards the Cascades.

As can be seen by the traffic cams, it's snowing in Everett, but actually accumulating as we move eat to places like Monroe and Sultan. Snow is also visible in Skagit and Whatcom Counties.

Everett

Monroe

Sultan

Burlington

Between Bellingham and Lynden.

[Rubus Leucodermis]

Psst… hey @Phil! You’re a palm tree fan, aren’t you?

 

[smerfylicious]

Been snowing the last 35-40 minutes. Yuuuuge flakes coming down now. 

[jcmcgaffey]

Was 42 a few hours ago and now down to 35 and dropping with a dew point of 29 with moisture coming in and starting to snow. 

[snow_wizard]

Wow!  The trends toward keeping it cold longer are dramatic on the GEFS runs today.  Much colder with the second shot.

[Front Ranger]

Everything is looking good for Seattle metro this evening.

Tim might wake up to 10" tomorrow morning.

[Nov1985]

1 hour ago, Mr Marine Layer said:

What happens when the convergence zone snow counter hits 0?

 

[yellowstone]

Few flurries so far. Temp just dropped 5 degrees in 30 minutes so not sure if that is the front?  Convergence band seems like it may be starting to expand south. Hoping so!

[Terreboner]

Things are actually turning in our favor for a white Christmas!!  Just have to hold off the warm up a day or 2 now.

[Ice_is_Everywhere]

Any chance that CZ continues to move south today?

[Gummy]

You can see the cold air filtering in on the temp map.

[snow_wizard]

4 minutes ago, TT-SEA said:

Big difference in high temps tomorrow between the GFS and ECMWF...

 

The ECMWF is definitely too weak with the cold today so maybe a compromise?

[snow_wizard]

1 minute ago, Ice_is_Everywhere said:

Any chance that CZ continues to move south today?

Likely.

[Rubus Leucodermis]

1 minute ago, Nov1985 said:

 

Based on reports of it already snowing in Fremont, I think the counter is a little slow.

[SnowySeeker50]

Puking ice pellets near bonney lake.

[TT-SEA]

Just now, snow_wizard said:

The ECMWF is definitely too weak with the cold today so maybe a compromise?

Maybe.

[MR.SNOWMIZER]

Just now, snow_wizard said:

The ECMWF is definitely too weak with the cold today so maybe a compromise?

It will be colder than 35 in bremerton tomorrow.  I would go with 28-32 for Seattle bremerton area.