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Sudden Stratospheric Warming (SSW) '21-'22


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On 10/11/2021 at 3:42 PM, Chris said:

Here's an article previously posted by Geos on SSW's and how they can bail out a snowless winter in the PNW lowlands, even in an El Nino.  Some of the classic PNW winters were started by an SSW.



That graphic showing the evolution of the SSW last winter is pretty amazing.

Death To Warm Anomalies!


Winter 2022-23 stats


Total Snowfall = 5.7"

Day with 1" or more snow depth = 5

Total Hail = 0.0

Coldest Low = 24

Lows 32 or below = 24

Highs 32 or below = 0

Lows 20 or below = 0

Highs 40 or below = 5



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  • 3 weeks later...
1 hour ago, Chris said:

No SSW on the horizon.

Not yet!

I’m starting to become interested in the period around the Holidays. But still many ways that could fail.


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  • 4 weeks later...
44 minutes ago, Phil said:

Scandinavian Ridge/NW-Pacific trough. Much better pattern for wave driving. Shift it slightly eastward and it’s even better.

Keep that pattern going for several weeks and the statistical likelihood of a SSW increases markedly.



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