2025-2026 ENSO

[raindancewx]

I've been talking about cold retrogressing to the West with time in 2026. We're finally seeing it show up now. Will be curious to see how the winter finishes up nationally. We're running "only" +6F now for January, big improvement on December since we're already 150% of average for moisture this month. A lot of the NW is running +10-20 above normal winter to date. Its hard to believe some kind of nasty regression to the mean isn't coming with Western Canada still very cold.

As the cold moves toward a more-centered West location and moisture picks up as the La Nina weakens/dies, we should slowly move into a regime of different storm tracks and more powerful systems. I fully expect large areas of the lower 48 to see most of their significant snows in Feb-Mar. Activity by NE Asia earlier in the month supported more western storminess very late month January.

[GaWx]

On 1/12/2026 at 11:32 AM, GaWx said:

How would a potential shift to +AAM late month play into this? Is the +AAM the dog that wags a +PNA and/or phase 8 or do other things wag the AAM? Is the AAM a leader or a follower?

@SnowNiner

 

Look how much this changed in just 2 days of runs:

 

[donsutherland1]

28 minutes ago, GaWx said:

Look how much this changed in just 2 days of runs:

 

I suspect that the recent EWB had an impact. La Niña is still exerting an influence.