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PNW March 2023 Weather Discussion (2012 Redux)


Requiem

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Got down to 30 this morning 67th freeze of the season. Hoping I can make it to 70!

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2023 - 2024 Cold Season Stats

Total Snowfall - 0.75”

Max Snow Depth - 0.5”

Coldest High Temp - 21 (Jan 13)

Coldest Low Temp - 9 (Jan 13)

Number of Freezes - 48

Sub-40 highs - 12

Highs 32 or lower - 3

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13 minutes ago, SouthHillFrosty said:

 

FE4C16C7-E9F0-4043-B4DB-93D660A8C181.png

5069731C-09F1-47AC-9D93-1DD2D220A58A.png

So maybe 1” or a bit more tomorrow, but 10” for the run here… interesting…

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Partly to mostly sunny skies again today from King County north to Bellingham... in the NE quadrant of the ULL offshore once again.

COD-GOES-West-subregional-Pac_NW.02.20230309.193617-over=map-bars=none.gif

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**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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12Z EPS... the beat goes on for CA.    You can also see the same area that is sunny up here today is also the driest area relative to normal along the entre West Coast over the next 2 weeks.

ecmwf-ensemble-avg-namer-qpf_anom_15day-9659200.png

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**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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15 minutes ago, ShawniganLake said:

Nam shows the deformation band across southern Vancouver Island being pretty juicy tomorrow morning. Could be 5-6” of snow at higher elevations if that verifies. ❄️ 

Shows your area getting snow as well.   Meanwhile almost no precip of any form in my area.

nam-nest-washington-total_snow_kuchera-8503600.png

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5 minutes ago, MR.SNOWMIZER said:

still only 36 degrees at home!! that is impressive

Crazy... but makes sense given the offshore flow in place.   Its in the upper 40s and low 50s across all of the Seattle area and northward.    

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**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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well here we go again

 

WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM TO NOON PST FRIDAY...

* WHAT...Snow expected. Total snow accumulations between 1 and 4
inches.

* WHERE...Post Falls, Coeur d'Alene, Cheney, Davenport, Rockford,
Worley, Fairfield, Airway Heights, Hayden, Spokane Valley, and
Downtown Spokane.

* WHEN...From 2 AM to Noon PST Friday.

* IMPACTS...Motorists should prepare for winter driving conditions
for the Friday morning commute. The heaviest snow with this event
is expected to fall in the 5 AM to 9 AM time frame.

* ADDITIONAL DETAILS...Travel conditions will improve late in the
morning and early in the afternoon as temperatures climb into the
mid and upper 30s. However, scattered snow showers late in the day
into the evening may produce additional localized accumulations
around or after the evening commute.
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32 minutes ago, TT-SEA said:

Crazy... but makes sense given the offshore flow in place.   Its in the upper 40s and low 50s across all of the Seattle area and northward.    

But where is the cooler air coming from? its not cold over towards you and blowing this way? is it  deep enough that its coming from east of the cascades?

We come from the land of the ice and snow.

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6 minutes ago, MR.SNOWMIZER said:

But where is the cooler air coming from? its not cold over towards you and blowing this way? is it  deep enough that its coming from east of the cascades?

Don't know for sure... but I doubt its coming from east of Cascades.

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**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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6 minutes ago, MR.SNOWMIZER said:

But where is the cooler air coming from? its not cold over towards you and blowing this way? is it  deep enough that its coming from east of the cascades?

From my armchair meteorological understanding the cool dry air from the offshore flow will sort of pile up on the leeward side of the mountains. We see the same thing down here to a lesser extent with the coast range. It’s not like the east wind source areas are even warm relative to average, and perhaps more importantly they have low dewpoints.

While the air in east wind areas is well mixed with a high temp/DP spread, cold air damming spots get a more stagnant, inversiony, “wet bulbed” version of the same airmass. Comes in handy when chilly systems move in since the relatively cool air and lack of mixing at the surface allows the airmass to become isotropic (uniform temps, in this case close to freezing throughout the column) more easily and drag the snow level to drag down to the surface.

I’m probably missing a ton of technical stuff but that’s my understanding as the layman.

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Summer ☀️ grows while Winter ❄️  goes

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9 minutes ago, Cascadia_Wx said:

From my armchair meteorological understanding the cool dry air from the offshore flow will sort of pile up on the leeward side of the mountains. We see the same thing down here to a lesser extent with the coast range. It’s not like the east wind source areas are even warm relative to average, and perhaps more importantly they have low dewpoints.

While the air in east wind areas is well mixed with a high temp/DP spread, cold air damming spots get a more stagnant, inversiony, “wet bulbed” version of the same airmass. Comes in handy when chilly systems move in since the relatively cool air and lack of mixing at the surface allows the airmass to become isotropic (uniform temps, in this case close to freezing throughout the column) more easily and drag the snow level to drag down to the surface.

I’m probably missing a ton of technical stuff but that’s my understanding as the layman.

So it basically builds up and out from the slope of the mountain. And there is a small area over here on the Kitsap peninsula that really holds the cold air. it is between green  mountain and the Olympic range. You can see this enhanced area of snowfall on the wrf map i posted.  

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We come from the land of the ice and snow.

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8 minutes ago, ShawniganLake said:

That system early next week looks cold and wet. Low snow levels.
 

👀 Mossman. 

Initially its a fairly mild system and wet system on Monday with 925mb temps of +7C or +8C across western WA... then some c-zone action on Tuesday morning when 925mb temps get down to -1C behind the main front.  

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**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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Hedging up...

 

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
334 PM PST Thu Mar 9 2023

IDZ002-WAZ036-101245-
/O.CON.KOTX.WW.Y.0020.230310T1000Z-230310T2000Z/
Coeur d`Alene Area-Spokane Area-
Including the cities of Post Falls, Coeur d`Alene, Cheney,
Davenport, Rockford, Worley, Fairfield, Airway Heights, Hayden,
Spokane Valley, and Downtown Spokane
334 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 AM TO NOON PST
FRIDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 5
  inches.

* WHERE...Post Falls, Coeur d`Alene, Cheney, Davenport, Rockford,
  Worley, Fairfield, Airway Heights, Hayden, Spokane Valley, and
  Downtown Spokane.

* WHEN...From 2 AM to Noon PST Friday.

* IMPACTS...Motorists should prepare for winter driving conditions
  for the Friday morning commute. The heaviest snow with this event
  is expected to fall in the 5 AM to 9 AM time frame.
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9 minutes ago, TT-SEA said:

18Z ECMWF for the next 24 hours from now through 4 p.m. tomorrow.

ecmwf-deterministic-washington-snow_24hr_kuchera-8492800.png

ecmwf-deterministic-washington-precip_24hr_inch-8492800.png

Pretty lame for most. On to spring. 

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Not completely familiar with who this is other than seeing his weather tweets but hopefully he recovers soon. 

F7457D95-5106-45CA-B279-10C89022609D.jpeg

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Elevation 580’ Location a few miles east of I-5 on the Snohomish Co side of the Snohomish/Skagit border. I love snow/cold AND sun/warmth! 

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58 minutes ago, Omegaraptor said:

Snowing heavily in Redding again. Because of f*cking course it is.

B6DC942F-9D54-4C8A-82EE-D95304FBA8B1.thumb.jpeg.b4b324782477a864478265edeae17d8d.jpeg

 

Jesse?

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Just now, AlTahoe said:

Rain has started up here. Let the mess begin. 

Here's a fun video of the snow depth at squaw valley base elevation 6200' 

Nobody alive has ever seen a low elevation snowpack like this year. 

https://www.instagram.com/reel/Cplnl5iojFB/?igshid=MDJmNzVkMjY=

Good luck to you and your community. Sounds like it’s going to be a rough few weeks. 

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Elevation 580’ Location a few miles east of I-5 on the Snohomish Co side of the Snohomish/Skagit border. I love snow/cold AND sun/warmth! 

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5 minutes ago, AlTahoe said:

Rain has started up here. Let the mess begin. 

Here's a fun video of the snow depth at squaw valley base elevation 6200' 

Nobody alive has ever seen a low elevation snowpack like this year. 

https://www.instagram.com/reel/Cplnl5iojFB/?igshid=MDJmNzVkMjY=

Marshmallow world!

**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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Tahoe gunna get a lot more snow too. 

Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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This must be one of the great winters of all time for the Great Basin. Burns Oregon is going to get hammered AGAIN tomorrow.

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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