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SW Flow vs NW Flow?


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Which do you prefer and why? what are the pros and cons to each? I am biased to NW Flow as the air is cleaner and lower snow levels. Does NW flow always lower snow levels?

 

Interesting northerly flow, especially offshore, bringing cold air from the Columbia basin toward a low pressure that stalls off the coast of Cape Blanco.

Springfield, Oregon cold season 19-20 Stats:

  • Coldest high: 34 (Nov 30)
  • Coldest low: 20 (Nov 29)
  • Days with below freezing temps: 63 (Most recent: Apr 14)
  • Days with sub-40F highs: 1 (Most recent: Nov 30, 2019) *Fewest all-time*
  • Total snowfall: 0.0"
  • Last accumulating snowfall: February 27, 2019
  • Last sub-freezing high: Jan 14, 2017 (31F)
  • Last White Christmas: 1990
  • Significant wind events (gusts 45+): 0

Personal Stats:

  • Last accumulating snowfall: February 27, 2019
  • Last sub-freezing high: Jan 14, 2017 (31)
  • Last White Christmas: 2008
  • Total snowfall since joining TheWeatherForums: 20.7"

GoFundMe: www.gofundme.com/CollegeBasketballvsEpilepsy

My Twitter @357jerseys4hope

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Oh! NW flow in summer doesn't deliver.  why is it in the winter it does a fairly good job?

 

Jet stream is farther north.

Finn Hill, elevation: 460 ft
2018 moisture: 41.76", 2019: 23.62", 9/23

 

2018-2019 winter snowfall total: 29.5"

2017-2018: 9.0", 2016-2017: 14.0"

Weather station/wx cam:
http://map.bloomsky.com/weather-stations/gqBxp6apnJSnqqm2

https://www.wunderground.com/personal-weather-station/dashboard?ID=KWABOTHE144#history

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For my area WNW flow is terrible because it shadows my area from snow, but true NW flow can work out well sometimes.  One of the best bets for snow in a marginal or just cold enough to snow situation is often WSW.  In general there is no question NW flow brings colder / more enjoyable weather in the winter than SW.

Death To Warm Anomalies!

 

Winter 2019-20 stats

 

Total Snowfall = 3.7"

Day with 1" or more snow depth = 3

Total Hail = T

Coldest Low = 20

Lows 32 or below = 60

Highs 32 or below = 0

Lows 20 or below = 1

Highs 40 or below = 10

 

 

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For my area WNW flow is terrible because it shadows my area from snow, but true NW flow can work out well sometimes.  One of the best bets for snow in a marginal or just cold enough to snow situation is often WSW.  In general there is no question NW flow brings colder / more enjoyable weather in the winter than SW.

 

Yeah definitely like the NW flow better. In order to avoid the sinking motion after the air rises and sinks downwind of the Olympics, it almost needs to be NNW. Like 270-300 degrees trajectory.

Finn Hill, elevation: 460 ft
2018 moisture: 41.76", 2019: 23.62", 9/23

 

2018-2019 winter snowfall total: 29.5"

2017-2018: 9.0", 2016-2017: 14.0"

Weather station/wx cam:
http://map.bloomsky.com/weather-stations/gqBxp6apnJSnqqm2

https://www.wunderground.com/personal-weather-station/dashboard?ID=KWABOTHE144#history

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For my area WNW flow is terrible because it shadows my area from snow, but true NW flow can work out well sometimes.  One of the best bets for snow in a marginal or just cold enough to snow situation is often WSW.  In general there is no question NW flow brings colder / more enjoyable weather in the winter than SW.

That's rather odd that SW flow can bring snow in marginal conditions but I've seen it sometimes.  What's up with that?

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That's rather odd that SW flow can bring snow in marginal conditions but I've seen it sometimes. What's up with that?

Maybe depends where you live. NW flow is generally bone dry here. Most of our snow comes with precip from the SW meeting cold air from the NE.
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Maybe depends where you live. NW flow is generally bone dry here. Most of our snow comes with precip from the SW meeting cold air from the NE.

 

Yeah you tend to hold onto cold air better up there. Must get trapped in between you and the mainland. Of course you have some orographic lift as well from that flow.

Finn Hill, elevation: 460 ft
2018 moisture: 41.76", 2019: 23.62", 9/23

 

2018-2019 winter snowfall total: 29.5"

2017-2018: 9.0", 2016-2017: 14.0"

Weather station/wx cam:
http://map.bloomsky.com/weather-stations/gqBxp6apnJSnqqm2

https://www.wunderground.com/personal-weather-station/dashboard?ID=KWABOTHE144#history

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Yeah you tend to hold onto cold air better up there. Must get trapped in between you and the mainland. Of course you have some orographic lift as well from that flow.

Any type of Easterly component to the wind will help trap the cold air up against the Vancouver Island mountains.
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What is the best setup for the east side of the valley? It seems like a lot of times the west side gets hit harder.

 

For the west side you need cold air to be flowing through the Fraser Valley and Squamish Valley. Then you need moisture over that, but not in a SW flow but more from a NW flow where the cold air drainage is overtaken by deeper milder ocean air.

Finn Hill, elevation: 460 ft
2018 moisture: 41.76", 2019: 23.62", 9/23

 

2018-2019 winter snowfall total: 29.5"

2017-2018: 9.0", 2016-2017: 14.0"

Weather station/wx cam:
http://map.bloomsky.com/weather-stations/gqBxp6apnJSnqqm2

https://www.wunderground.com/personal-weather-station/dashboard?ID=KWABOTHE144#history

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