April 2026 Weather In The PNW

[SeattleSmokeLayerFan]

3 minutes ago, TT-SEA said:

Side note... tomorrow is going to be full blasting, scorching, face melting radiance from the star our planet orbits.   Stay safe.   Soon it will be time to hunker down in a dark, enclosed room for months on end or risk death from laser level brightness that draws most of the populace outdoors.  

Tomorrow is definitely the most concerning. But it's just one day and luckily not the highest temperature of the weekend.

Marine layer has stuck around longer today, to my surprise. The sun misers in Vancouver BC especially must be sad.

[TT-SEA]

4 minutes ago, SeattleMarineLayerFan said:

Tomorrow is definitely the most concerning. But it's just one day and luckily not the highest temperature of the weekend.

Marine layer has stuck around longer today, to my surprise. The sun misers in Vancouver BC especially must be sad.

You are overlooking Monday.... best to call in sick if you have to work.   Not to enjoy the best day of the year so far but to draw the shades and stay in bed.

[MossMan]

8 minutes ago, TT-SEA said:

Side note... tomorrow is going to be full blasting, scorching, face melting radiance from the star our planet orbits.   Stay safe.   Soon it will be time to hunker down in a dark, enclosed room for months on end or risk death from laser level brightness that draws most of the populace outdoors.  

Many northwesterners tomorrow…

[SeattleSmokeLayerFan]

1 minute ago, TT-SEA said:

You are overlooking Monday.... best to call in sick if you have to work.   Not to enjoy the best day of the year so far but to draw the shades and stay in bed.

Quick relief on Tuesday morning anyways. One day that barely hits 70 if lucky .... Nothing to worry about. There still seems to be some cloud cover in the mix as well.

[TT-SEA]

2 minutes ago, SeattleMarineLayerFan said:

Quick relief on Tuesday morning anyways. One day that barely hits 70 if lucky .... Nothing to worry about. There still seems to be some cloud cover in the mix as well.

Quick relief?   Tuesday might still be fairly sunny in the afternoon with scorching highs in the 50s.   Do you know what 55 and sun feels like?   Its not relief... its painful.  

[TT-SEA]

I like the progression the AIGFS better than the GFS.   Troughing digs in from the east during the middle of next week but then moves out in time for the weekend.    

[SeattleSmokeLayerFan]

16 minutes ago, TT-SEA said:

Quick relief?   Tuesday might still be fairly sunny in the afternoon with scorching highs in the 50s.   Do you know what 55 and sun feels like?   Its not relief... its painful.  

Showers are expected after midnight. Should see some cloud cover throughout the day.

[SeattleSmokeLayerFan]

11 minutes ago, TT-SEA said:

I like the progression the AIGFS better than the GFS.   Troughing digs in from the east during the middle of next week but then moves out in time for the weekend.    

I thought the GFS doesn't matter.

King Euro, right?

And the 00z run looks lovely.

EPS shows less confidence in the heat compared to the AI GFS.

[TT-SEA]

8 minutes ago, SeattleMarineLayerFan said:

I thought the GFS doesn't matter.

King Euro, right?

And the 00z run looks lovely.

EPS shows less confidence in the heat compared to the AI GFS.

AI runs matter more across the board.  

Here is the ECMWF AIFS... also quite nice if you don't want constant rain and clouds.    I am just glad the dominant and stagnant pattern we had in March is gone. 

[TT-SEA]

11 minutes ago, SeattleMarineLayerFan said:

I thought the GFS doesn't matter.

King Euro, right?

And the 00z run looks lovely.

EPS shows less confidence in the heat compared to the AI GFS.

Nice that you called the 00Z ECMWF lovely.   It was a very dry run.   

[bainbridgekid]

Fairbanks hit 33 degrees yesterday for their first temperature above freezing since Halloween. Tied for their latest first day above freezing ever. What a Winter they had.

[SeattleSmokeLayerFan]

8 minutes ago, TT-SEA said:

Nice that you called the 00Z ECMWF lovely.   It was a very dry run.   

The Euro seems to always show that. Genuinely think it has some issue modeling precip here.

But the colder air seems more pronounced on that run.

The AIFS is also fine. No signs of a torch... Like The AI GFS is 

[the_convergence_zone]

The last time KSEA didn’t have at least one 70 degree day in March or April was 2017. 

[TT-SEA]

2 minutes ago, SeattleMarineLayerFan said:

The Euro seems to always show that. Genuinely think it has some issue modeling precip here.

But the colder air seems more pronounced on that run.

The AIFS is also fine. No signs of a torch... Like The AI GFS is 

ECMWF doesn't always show that... far from it.   It was constantly showing much wetter than normal for most of March which was in fact reality.  

[SeattleSmokeLayerFan]

7 minutes ago, TT-SEA said:

ECMWF doesn't always show that... far from it.   It was constantly showing much wetter than normal for most of March which was in fact reality.  

Didn't do so well on March 13th.

[SeattleSmokeLayerFan]

8 minutes ago, the_convergence_zone said:

The last time KSEA didn’t have at least one 70 degree day in March or April was 2017. 

Maybe could've been no 70s in April too. Unfortunately Monday will ruin that.

[MossMan]

I had COVID snow falling on this day 5yrs ago! 

[KeyPeninsula_Wx]

4 minutes ago, SeattleMarineLayerFan said:

Didn't do so well on March 13th.

As bad as the euro was for that one event…overall in the majority of situations I’d still give it some weight in terms of forecasting. 3/13/26 was a fluke scenario that was kind of hard to forecast. 

[TT-SEA]

1 minute ago, SeattleMarineLayerFan said:

Didn't do so well on March 13th.

Confusing response...  we weren't talking about a single day with a marginal air mass and corresponding snowfall maps.   Every run the ECMWF was wetter than normal for almost a month and just recently started showing generally dry weather.  You implied it always showed drier than normal which is far from the truth.

[KeyPeninsula_Wx]

28 minutes ago, TT-SEA said:

Nice that you called the 00Z ECMWF lovely.   It was a very dry run.   

Sure seems like the dry season wants to start early this year. Obviously we could flip to a wet by mid spring pattern in a few weeks…but it seems in recent years long dry spells in April or May are a precursor to a warm dry summer. 

[SeattleSmokeLayerFan]

8 minutes ago, TT-SEA said:

Confusing response...  we weren't talking about a single day with a marginal air mass and corresponding snowfall maps.   Every run the ECMWF was wetter than normal for almost a month and just recently started showing generally dry weather.  You implied it always showed drier than normal which is far from the truth.

You were posting the Euro all winter to wishcast a permaridge. It's definitely a dry biased model.

[TT-SEA]

3 minutes ago, KeyPeninsula_Wx said:

Sure seems like the dry season wants to start early this year. Obviously we could flip to a wet by mid spring pattern in a few weeks…but it seems in recent years long dry spells in April or May are a precursor to a warm dry summer. 

We will see.   I definitely prefer a wet March to offer a better chance at dry weather in April and May.

[KeyPeninsula_Wx]

1 minute ago, TT-SEA said:

We will see.   I definitely prefer a wet March to offer a better chance at dry weather in April and May.

Seems like that’s the way we’re going. We will probably get one or two “wet” weeks in late April into early May. Then a few random days with rain in June. 

[TT-SEA]

3 minutes ago, SeattleMarineLayerFan said:

You were posting the Euro all winter to wishcast a permaridge. It's definitely a dry biased model.

Do you remember all the sunny days in January?   Dry weather actually happened.   

[SeattleSmokeLayerFan]

Just now, TT-SEA said:

Do you remember all the sunny days in January?   Dry weather actually happened.   

https://journals.ametsoc.org/view/journals/hydr/22/5/JHM-D-20-0308.1.xml

"These precipitation biases are, in general, dependent on the observed (or climatological) precipitation at the stations, with the stations with low observed precipitation having an IFS wet bias and stations with high observed precipitation having an IFS dry bias."

It's a known bias.

[TT-SEA]

1 minute ago, SeattleMarineLayerFan said:

https://journals.ametsoc.org/view/journals/hydr/22/5/JHM-D-20-0308.1.xml

"These precipitation biases are, in general, dependent on the observed (or climatological) precipitation at the stations, with the stations with low observed precipitation having an IFS wet bias and stations with high observed precipitation having an IFS dry bias."

It's a known bias.

Okie dokie.   The ECMWF went from showing much wetter than normal forever to now showing much drier than normal.   The pattern has changed.  

[Port Angeles Foothiller]

1 hour ago, SeattleMarineLayerFan said:

Quick relief on Tuesday morning anyways. One day that barely hits 70 if lucky .... Nothing to worry about. There still seems to be some cloud cover in the mix as well.

You make me root for another heat dome. 

[T-Town]

1 hour ago, MossMan said:

Many northwesterners tomorrow…

 

[Omegaraptor]

1 hour ago, SeattleMarineLayerFan said:

The Euro seems to always show that. Genuinely think it has some issue modeling precip here.

But the colder air seems more pronounced on that run.

The AIFS is also fine. No signs of a torch... Like The AI GFS is 

Any precip for the foreseeable future is going to be from meandering ULLs and moving parts in the upper level pattern. Pacific jet is gonna be shut down for a bit, no more ARs anytime soon.

On a positive note, the meandering ULLs might actually give California rain. Sacramento had a +8.6 departure for March with 0.14" rainfall for the month, after western WA feasted on rain all of March I think our starving friends south of the Siskiyous can be thrown a few table scraps.

[TT-SEA]

8 minutes ago, Omegaraptor said:

Any precip for the foreseeable future is going to be from meandering ULLs and moving parts in the upper level pattern. Pacific jet is gonna be shut down for a bit, no more ARs anytime soon.

On a positive note, the meandering ULLs might actually give California rain. Sacramento had a +8.6 departure for March with 0.14" rainfall for the month, after western WA feasted on rain all of March I think our starving friends south of the Siskiyous can be thrown a few table scraps.

FWIW... the ECMWF does get sort of AR-ish at the end of the run in 2 weeks.

[T-Town]

29 minutes ago, TT-SEA said:

FWIW... the ECMWF does get sort of AR-ish at the end of the run in 2 weeks.

Please stay in your lane and tell us it will be warm and dry. 

[Edmonds Husky]

45 minutes ago, TT-SEA said:

FWIW... the ECMWF does get sort of AR-ish at the end of the run in 2 weeks.

I’m sure the broader pattern is looking drier than normal though on the ensembles. Maybe the torch fest will start early this year

[KeyPeninsula_Wx]

56 here. Would think it’s a nice day but everything’s dying and wilting in the sun since we’re getting close to 60 out there. 

[SunnyWeatherFan]

Sub-50°F highs are miserably cold for April. Polar bear weather 

I'm 100% serious. Winter weather in spring sucks 

[TT-SEA]

Well... its a lovely sunny day here even though its a little too chilly for my liking.  

[SunnyWeatherFan]

16 hours ago, SeattleMarineLayerFan said:

40s and clouds here today. Good reprieve from the sweltering 50s and sun earlier in the week. But now we're headed into the 60s and maybe cracking 70.... 

I'm not a penguin, so I don't like cold. Humans evolved in warm climates 

[SunnyWeatherFan]

Perfect climate for @SeattleMarineLayerFan!

[TT-SEA]

2 minutes ago, SunnyWeatherFan said:

Perfect climate for @SeattleMarineLayerFan!

Looks like its too cold for trees to grow... just the way he likes it!   Barren landscape when warm season highs barely make it to 50.   Although 1,300 hours of annual sunshine is way too much for him.

[Tyler Mode]

Hot!!!!

Conditions will be warmest in the Cascade valleys
and along the Cascade Foothills, along with the south Sound,
where temperatures are favored to surpass 70 degrees. This
introduces Minor (Yellow) HeatRisk for areas along and southward
of the Puget Sound on Sunday.

[MossMan]

Stopped by the lake…Water level is pretty high, mostly typical for the time of year, but maybe slightly higher than average. No sandy beach yet.