April 2024 Weather in the PNW

[TigerWoodsLibido]

When I see a cool tree…

[SilverFallsAndrew]

Good news is burning is allowed today. When I burn the wet straw from the dog kennels I will make sure the wind is blowing towards @MossMan's house!

[TT-SEA]

5 minutes ago, SilverFallsAndrew said:

Gotta wonder what they are pumping into the atmosphere today.

Pre-frontal sunny days are classic conditions for contrails.  It's science not conspiracy.

[T-Town]

6 minutes ago, SilverFallsAndrew said:

Gotta wonder what they are pumping into the atmosphere today.

Not sure but I can tell you I was quite worried about WW3 earlier but now I feel like calmly and meekly paying my taxes. 

[Cascadia_Wx]

10 minutes ago, SilverFallsAndrew said:

Good news is burning is allowed today. When I burn the wet straw from the dog kennels I will make sure the wind is blowing towards @MossMan's house!

I bet all the dog pee makes that straw smell real ripe Andrew 

[SilverFallsAndrew]

6 minutes ago, Cascadia_Wx said:

I bet all the dog pee makes that straw smell real ripe Andrew 

Muddy dogs!!!

[SilverFallsAndrew]

16 minutes ago, TT-SEA said:

Pre-frontal sunny days are classic conditions for contrails.  It's science not conspiracy.

No, it’s actually the 9th COVID booster!

[Phishy Wx]

18 minutes ago, TT-SEA said:

Pre-frontal sunny days are classic conditions for contrails.  It's science not conspiracy.

maybe some sky writing practice

[Phishy Wx]

time to head to the brewery and soak it in. 

[Cascadia_Wx]

12 minutes ago, SilverFallsAndrew said:

Muddy dogs!!!

Great band. I think they will be playing LIVE in Austin next month  

[TT-SEA]

Cottonwoods starting to take on the glossy green summer look here now.   A couple weeks out from puffball mania.

[Cascadia_Wx]

14 minutes ago, Phishy Wx said:

time to head to the brewery and soak it in. 

Keep us posted!!!

[Deweydog]

Quite the stunner out there, fellas.

Gonna be quite the finish in Augusta!!

Hope it snows next winter!!!

[TT-SEA]

27 minutes ago, Phishy Wx said:

time to head to the brewery and soak it in. 

Lots of restaurants in downtown Bellevue have their summer patios open now and they were packed yesterday evening.  

[Phil]

Bit by bit guidance is erasing the troughy period imby. This hobby is effing brutal.

[TT-SEA]

Deadly contrails appearing out here now as well.   Probably spraying us all with another COVID vaccine.

[the_convergence_zone]

Tiger mountain this morning. There are foxgloves growing everywhere in that clear cut, it’s going to look awesome in amount a month. 

[Phil]

17 hours ago, Meatyorologist said:

Buddy and I went on a walk to enjoy the catastrophe today. Saw some cumulus shrouding Mt. Rainier, lots of high clouds, sunny, mild weather.

Him and I are both science nerds so we got to talking about adiabatic cooling and how it works... Neither of us really knew the exact answer, and none of the information we read online felt comprehensive or satisfying. After some shared thought my buddy tossed me a theory that I think makes the most sense. As he guessed, as a parcel rises, and the volume of that parcel increases, the fastest moving ("hottest") molecules in that parcel travel outwards towards the edge first, since they are faster. Those "hot" molecules, being the first of the parcel to make direct contact with the environent surrounding it, transfer their heat out via conduction. It's essentially a molecule sorting process, where the hottest molecules are most likely to conduct their thermal energy to the surroundings, since they are faster than the rest of the molecules, and fill in the expanding parcel first. As you can imagine, transferring heat out of the parcel via the warmest particales preferentially will cool off the parcel, and at a fixed, predictable rate, too.

Any seasoned mets want to pitch in? Are we onto something or shooting blanks? Don't know where else to ask. Maybe Reid Wolcott knows.

To simplify it greatly, the “cooling” occurs because the average kinetic energy of molecules decreases as the parcel expands and does work on its surroundings.

It boils down to the 1st law of thermodynamics, where ΔU = Q - W (change in internal energy of the system equals the heat added to the system minus the work done by the system). Because this is an adiabatic process, Q (heat exchanged) will always = 0. So therefore ΔU = -W.

So the more work the parcel does on its surroundings, the more the internal kinetic energy will decrease.

[Phil]

Of course the atmosphere is not an ideal gas, so the equation is a bit more complicated as the translational, vibrational, and rotational molecular degrees of freedom all have to be accounted for, and the atmosphere consists of monoatomic, diatomic, triatomic, tetraatomic, and pentaatomic molecules.

Long story short, the moist and dry adiabatic lapse rates differ due to the absorption/release of latent heat during the phase changes of H2O. DALR is simply G/Cp (~ 9.8K/km) while the MALR is state dependent because you have to factor in latent heat of vaporization, mixing ratio of moist air r/t dry air, the specific gas constants for moist and dry air, absolute temperature (in K) and the specific heat of dry air at constant pressure.

[Phil]

85 fuuking degrees. Overachieved by 7°F.  Tim would be in heaven right now.

[Frontal Snowsquall]

17 hours ago, Meatyorologist said:

Salem should be grateful.

Any moisture is a blessing!

[Frontal Snowsquall]

10 minutes ago, Phil said:

85 fuuking degrees. Overachieved by 7°F.  Tim would be in heaven right now.

A No Cloud Shocker!

[Anti Marine Layer]

Marine layer in Astoria. Woohoo

[TT-SEA]

19 minutes ago, Phil said:

85 fuuking degrees. Overachieved by 7°F.  Tim would be in heaven right now.

85 is too cold.  105 is better.  125 is ideal.

[SilverFallsAndrew]

Mostly cloudy today. First mow of the year. 

[SilverFallsAndrew]

16 minutes ago, Deweydog said:

Quite the stunner out there, fellas.

Gonna be quite the finish in Augusta!!

Hope it snows next winter!!!

I'm pretty white, but I'm not THAT white. 

[TT-SEA]

Looks like a mid summer day at T-Mobile for the Mariners game.  Better than the roof closed cold misery that will be tomorrow's game.

[Deweydog]

3 minutes ago, SilverFallsAndrew said:

I'm pretty white, but I'm not THAT white. 

Andrew, I’d still love you if you were the color of a baboon’s a**.

[TT-SEA]

10 minutes ago, SilverFallsAndrew said:

Mostly cloudy today. First mow of the year. 

Just two more months until your trees start to bud.   Getting closer!

[Cascadia_Wx]

39 minutes ago, Phil said:

85 fuuking degrees. Overachieved by 7°F.  Tim would be in heaven right now.

That’s how it always is around here too. I’ve learned to add at least 3-5 degrees to every forecast high lately. Especially at the major record keeping stations. A day like yesterday where we actually underachieved most guidance is really rare and notable these days.

[TT-SEA]

18Z GFS sticking to its guns with a ULL parked over the PNW next weekend.   My sense is the ECMWF will cave to this scenario.   

[ShawniganLake]

3 hours ago, SilverFallsAndrew said:

Gotta wonder what they are pumping into the atmosphere today.

The next virus “they” are going to make us get vaccinated for.  
 

 

[Phishy Wx]

74 and glorious

[MossMan]

Another gorgeous weekend day! Got another landscape freshening phase done, now it’s BBQ time. 
Oh and a Bobcat paid a visit as well. Waltzed right by the kitchen window so I grabbed my phone as it was rounding the garage and to the side of the house. By the time I got around to that side it had just jumped over my gate. 

[Phishy Wx]

35 minutes ago, MossMan said:

Another gorgeous weekend day! Got another landscape freshening phase done, now it’s BBQ time. 
Oh and a Bobcat paid a visit as well. Waltzed right by the kitchen window so I grabbed my phone as it was rounding the garage and to the side of the house. By the time I got around to that side it had just jumped over my gate. 

is that a puma?

[T-Town]

48 minutes ago, Phishy Wx said:

74 and glorious

How were the beers?  Refreshing?

[YahRaEl]

Speaking of beer!!! Ice Cold Busch 

[MossMan]

39 minutes ago, Phishy Wx said:

is that a puma?

No it was smaller than a Puma so definitely Bobcat. I had a great visual when it was by the kitchen window, of course it was the one time my phone wasn’t attached to me! 

[Phishy Wx]

51 minutes ago, T-Town said:

How were the beers?  Refreshing?

incredible.  I also saw some black rabbits.  apparently they live here, never knew,  just chilling in the lawn of the brewery

[Cold Snap]

This is how much the trees are leafed out in my neighborhood so far.