2025-2026 ENSO

[snowman19]

7 hours ago, Stormchaserchuck1 said:

I think the only difference between this year and last year is 2nd year La Nina's have a little more Winter -PNA than the first year, and 2nd year -PDO's, when they don't correlate the first year, correlate the 2nd year at +1.24x. But La Nina is struggling right now.. it's starting to look like at the surface it won't make the 5 consecutive ONI month criteria. Subsurface is also weak right now.. barely -1 to -2 subsurface anomalies, and the SOI is weakly hanging around +5. Border line weak-Nina/negative-Neutral.

Also last Summer we had a strong 4-corners High pressure.. that rolled forward to a pretty cold composite for the eastern 2/3 of the US for December and January (+PNA).. the SW, US High pressure wasn't as strong this Summer. However, 9 of the last 14 months have been +PNA [CPC], despite negative-ENSO. The Aleutian ridge hasn't yet gone back to levels it was before the 23-24 Strong Nino fwiw. It would surprise me if we saw a strong/persistent Aleutian ridge this cold season. It seems like it would have to kind of come out of nowhere. 

I’m very confident that we see an Aleutian ridge regime this winter as opposed to an Alaskan ridge regime. I’m also extremely confident that we see a lot more -PNA this winter as well, if I’m wrong, I’ll own it

[snowman19]

The new model runs are showing a brick wall of subsidence continuing in the tropical PAC. It’s been in place for months now (Niña/-IOD related). Don’t be surprised if the MJO wave doesn’t make it very far east of the Maritime Continent (phase 7) before it completely dies off. 
 
As far as the Atlantic hurricane season, I think after whatever forms in the central Caribbean next week, the season comes to an end. I don’t think it will be any threat at all to the U.S. mainland and it probably just moves west and buries itself into Central America or gets picked up and swept way OTS in the westerlies 

[Stormchaserchuck1]

I was surprised NOAA had 19 Named Storms at the high end of their range this season.. their high end was 25 Named Storms last season.. they have been too high 2 years in a row. Global ACE hasn't been as the same as Atlantic ACE and I think that is going to level out a bit in the coming years. 

As for the MJO, long range models have been trying with the idea of a +PNA last few days of October, into the first week of November. It will be interesting to see how that verifies.. I think there is some expectation of the MJO making it to Phase 7. 

[bluewave]

On 10/18/2025 at 6:33 AM, snowman19 said:

Yes. It is a category 5 (beyond extreme) marine heatwave and I think it’s being completely overlooked in regards to this upcoming winter. A marine heatwave this extreme is going to dramatically alter the global heat budget and I think it’s going to play a way bigger role than most people expect. Just like the extreme marine heatwave north of Australia that was totally overlooked back in the fall of 2019 and it ended up playing a very big role in the 2019-20 winter (++IOD)   @bluewave

 

 

 

 

Even warmer than the previous record at this time back in 2022.