Pacific Northwest Weather - May 2023

[Ken in Wood Village]

Check out the thunder head

[Ken in Wood Village]

I'm in between this storms! Just heard thunder

[Ken in Wood Village]

There is some good outflow winds from this storm.

[FroYoBro]

Rain is really coming down hard now. Thunder is finally decreasing.

 

Thank you Zeus! Your blessings will not be ignored! 

[T-Town]

Pretty gnarly looking cloud. All for show though, no blessings here. 

[Omegaraptor]

5 minutes ago, FroYoBro said:

Rain is really coming down hard now. Thunder is finally decreasing.

 

Thank you Zeus! Your blessings will not be ignored! 

Literally an hour after I head back to Corvallis, Tigard gets a thunderstorm. 

Do I have to fly to f*cking Venezuela to see a thunderstorm now?

[BLI snowman]

2 hours ago, SilverFallsAndrew said:

Checked out 1957-58, 1965-66, and 1972-73. @Phil

Up here the latter two were pretty decent. 1957-58 was a regional dud. Very wet at times though. 

1965-66 looks like it had some kind of arctic outbreak in Mid-December, SLE even had about 7.5" of snow that month, and Silver Falls had a 30/7 day. Silver Falls also recorded 15.1" of snow in March, as well as a low of 21 pretty late in the month followed by a high of 80 a few days later. 

1972-73 of course had one of the all-time arctic outbreaks in December, but also a cold January with some single digit lows. All three of those years were pretty wet in December/January. 

February 1958 had a +7.7F departure at Silver Falls. 

Fake cold. Just very cold in the Willamette Valley. Bit like December 2005. 

[BLI snowman]

2nd time in the last week we've mostly been skipped over in the north metro with the thunder. Although it looks like that cell east of Battle Ground really took off.

Edited May 9 by BLI snowman

[Ken in Wood Village]

These storms are merging together. They are not producing lightning now but it will produce heavy rain. Maybe hail too.

[SouthHillFrosty]

2 hours ago, MossMan said:

Interesting…

[Tyler Mode]

A little thunder here.  Heavy rain and hail one mile east of here.

[Anti Marine Layer]

1 hour ago, Omegaraptor said:

Literally an hour after I head back to Corvallis, Tigard gets a thunderstorm. 

Do I have to fly to f*cking Venezuela to see a thunderstorm now?

No to Florida or Omaha 

[NWbyNW]

Possibly record heat heading towards Western Washington.    Many site's are saying mid to high 80s on Sunday and Monday.  Some say 90s.  It's too early for this stuff.  Hopefully runs back down. 

[T-Town]

2 minutes ago, Anti Marine Layer said:

No to Florida or Omaha 

 

[Deweydog]

HEAVY RAIN

[Cascadia_Wx]

Today ended up much warmer than expected from about Woodburn north. But at least we’ve had some heavy rain at times and distant thunder this evening. Looks like the south part of the metro got slammed pretty good earlier this afternoon.

A fairly seasonable 67/42 spread here.

[MossMan]

62/40 on the day. 

[SilverFallsAndrew]

3 hours ago, BLI snowman said:

Fake cold. Just very cold in the Willamette Valley. Bit like December 2005. 

Oh dang. I think SLE had a couple highs in the upper 20s that’s some legit fake cold. 

[SilverFallsAndrew]

Very chilly day down here. 49/39

[Tyler Mode]

Perfectly timed sunbreaks for sunset tonight...

[Front Ranger]

1 hour ago, SilverFallsAndrew said:

Oh dang. I think SLE had a couple highs in the upper 20s that’s some legit fake cold. 

Words that only go together on a weather forum.

[Eugene-5SW]

53º for a high today. Looking like it could be 40º warmer than that by this weekend.

0.22" rain on the day, 0.70" on the month, 26.18" since October 1.

[Phil]

Yesterday was the first day I could feel the humidity in the air. Creeping in a little more each week.

Tim season approacheth.

[Rubus Leucodermis]

Some first-class quality torching in the .

[Rubus Leucodermis]

Looks like GooFuS was living up to its nickname regarding the 100-burgers west of the Cascades, though.

 

[SilverFallsAndrew]

29 minutes ago, Rubus Leucodermis said:

Looks like GooFuS was living up to its nickname regarding the 100-burgers west of the Cascades, though.

 

Hmmm doesn’t look much above 90 from SLE south. 

[SilverFallsAndrew]

0.22” of rain overnight and a low of 41. Should be a nice day. 

[Frontal Snowsquall]

First heatwave on the way later this week, good timing with it occurring this weekend. Great weekend to head to the Coast!

[SilverFallsAndrew]

Looks like a bit of a pull back beginning on the GFS. 

[GobBluth]

GFS looks a lot different with ridge and cut off low strength into Monday.

[Deweydog]

Not too often (ever) do you see a vort head due west from North Dakota to the Oregon Coast. Definitely a testament to the beefiness of the Canadian anti-cyclone.

[SilverFallsAndrew]

Score?

[Phishy Wx]

 

[Slushy Inch]

12 minutes ago, SilverFallsAndrew said:

Score?

That could be regional with a few tweaks. Shift the trough southeast and we’ll be talking.

[Slushy Inch]

Waiting to see the end of the warm anomalies. Probably 70s and 80s, no more 90s.

[Slushy Inch]

13 minutes ago, Deweydog said:

Not too often (ever) do you see a vort head due west from North Dakota to the Oregon Coast. Definitely a testament to the beefiness of the Canadian anti-cyclone.

Certainly an odd trajectory.

[SilverFallsAndrew]

Yeah, still gonna be toasty for a while. 

[SilverFallsAndrew]

OMG yes please!

[T-Town]

Need a Yellowstone update from @TacomaWx. Hopefully he didn’t take my advice on petting the bison.

[Slushy Inch]

Just weird.

[Phil]

1 hour ago, Slushy Inch said:

Waiting to see the end of the warm anomalies. Probably 70s and 80s, no more 90s.

You’ll be waiting awhile.

[Anti Marine Layer]

Portland's all time high is hotter than Los Angeles. 

[Phil]

1 minute ago, Slushy Inch said:

Just weird.

Yeah but so is this. Models aren’t bluffing.

[Anti Marine Layer]

5 hours ago, Rubus Leucodermis said:

Some first-class quality torching in the .

Let the snowpack melt.

[Phil]

Interestingly, the most stable low pass signal in the extended EPS’s hovmoller of VP200 anomalies is in the IO/Africa/Atlantic sector, not the Pacific sector.

This is a +IOD/+AMO quasi-standing wave signature, which is associated w/ the deposition of AAM and of course the east-based El Niño signature (at this time of year).

Yet analogs are basically nonexistent in the satellite era.

[Slushy Inch]

4 minutes ago, Phil said:

Yeah but so is this. Models aren’t bluffing.

The hell is angular momentum?

[Slushy Inch]

Hmm looks like a recipe for convection. Very warm moist southeast flow. Not the best trough.  

[Slushy Inch]

Dewpoints in the uppers 50s and 60s and temperatures in the 80s with thunderstorms.

[Phil]

20 minutes ago, Slushy Inch said:

The hell is angular momentum?

Simple/non-physicsy explanation: Earth and its atmosphere are both rotating (obviously). But sometimes, due to how the two interact, that momentum/rotary inertia may be exchanged between them. In fact it’s constantly being exchanged. But the overall angular momentum of the system (earth + atmosphere) is constant (conserved).

+AAM (positive *atmospheric* angular momentum) describes a state where angular momentum has been transferred from the earth to the atmosphere (hence earth rotates a little bit slower, atmosphere rotates a little bit faster). Vice versa for the -AAM state.

Depending on when these exchanges occur, where they occur (mountain torque is the reason, and there are many mountain ranges that can contribute), the rate at which it occurs, and its amplitude, the global circulation/wave dynamics can/will be affected (in a state dependent manner).

[Cold Snap]

31 minutes ago, Anti Marine Layer said:

Let the snowpack melt.

I remember after the June 2021 heatwave I had never seen Mount Rainier so bare. Hope I never have to see it that bare again though it’s inevitable in a warming climate.