2026-2027 Super El Nino

[EasternLI]

I think we'll see a pretty darn robust STJ, eventually. Remember there's some resistance in the pacific with the -PDO too. That's a battle royale there IMO but I think the sheer magnitude of this el nino overwhelms it. But it's going to take some time to do that. Aifs-ens would suggest we see it start to fire up a little bit towards mid Aug. Will be interesting to see if that's accurate and if it starts to ramp up more as we move towards autumn. If we see that, I'd feel more confident. 

 

As far as the QBO is concerned. That's an area of ongoing research. Which has been noticed more and more as an important factor in various areas. So it has been gaining more and more interest. Here's some newer work that also included the Pacific jet. The image below is actually a cross section of the jet in late winter. Same conclusion. El nino + WQBO is the combo for the strongest jet. ERA5 data in top row model runs in the rows underneath. 

 

QBOi El Niño–Southern Oscillation experiments: teleconnections of the QBO

https://wcd.copernicus.org/articles/6/1419/2025/

 

Quote

In the subtropics, the QBO has a direct influence on the subtropical jet through its secondary circulation. Observational studies have indicated that the QBO can affect the subtropical jet variability, particularly in the Pacific sector (e.g. Garfinkel and Hartmann, 2011a, b). During QBO-W, a horseshoe-shaped zonal wind anomaly forms in the UTLS associated with an equatorward shift of the Asian-Pacific jet (APJ) (Crooks and Gray, 2005; Simpson et al., 2009) This response is evident even near the surface over East Asian (Park et al., 2022; Park and Son, 2022).

 

[40/70 Benchmark]

6 hours ago, Stormchaserchuck1 said:

I was just mentioning that your analog composite of <-60dm for DJFM is probably too low. I used 6 straight months of -PNA as an example. That doesn't mean I expect the PNA to be negative, just that there are competing forces right now. 

I understand all of that....and I have tried to explain to you that you are taking that composite far too literally....it's not a forecast composite....it does't even incorporate the extra tropical Pacific.  It's literally just a composite derived from solar, QBO and ENSO data, as that is how I assess the polar fields.

[40/70 Benchmark]

2 hours ago, EasternLI said:

I think we'll see a pretty darn robust STJ, eventually. Remember there's some resistance in the pacific with the -PDO too. That's a battle royale there IMO but I think the sheer magnitude of this el nino overwhelms it. But it's going to take some time to do that. Aifs-ens would suggest we see it start to fire up a little bit towards mid Aug. Will be interesting to see if that's accurate and if it starts to ramp up more as we move towards autumn. If we see that, I'd feel more confident. 

 

As far as the QBO is concerned. That's an area of ongoing research. Which has been noticed more and more as an important factor in various areas. So it has been gaining more and more interest. Here's some newer work that also included the Pacific jet. The image below is actually a cross section of the jet in late winter. Same conclusion. El nino + WQBO is the combo for the strongest jet. ERA5 data in top row model runs in the rows underneath. 

 

QBOi El Niño–Southern Oscillation experiments: teleconnections of the QBO

https://wcd.copernicus.org/articles/6/1419/2025/

 

 

QBO is a great forecasting tool....I've been killing it the past couple years integrating the QBO with solar cycle.

[chris21]

16 hours ago, bluewave said:

1997-1998 was a great example of what happens when the STJ overpowers the pattern with too much warmth. NYC only finished with 5.5 inches of snow that season. Many lows running to the Ohio Valley and then tracking very close to the area. I made a composite of the 12 heaviest precipitation days that winter. 
 

12 heaviest precipitation storm days in NYC during DJF 1997-1998 and the storm track progression 

 

 

Interestingly, this was one of the snowiest winters on record for the Southern Appalachians. 

[snowman19]

As expected:

[bluewave]

16 hours ago, snowman19 said:

Back in May, Eric Webb argued that the ++PMM was acting as a defacto +PDO. +PMM or not, my guess is that we see a flip to a weak positive PDO by the end of fall given the historic strength and strong coupling of this El Niño

One thing is for sure, this El Niño looks more and impressively by the day, regions 3.4, 3 and 1+2 are in overdrive, as are the WWBs, subsurface, SOI and DWKWs….

 

 

 

 

 

 

 

 

 

It would be interesting to know what caused the WWBs to be so much stronger this year than in 2023-2024 and 2015-2016? We noticed the record WWBs developing back in December north of Australia.

These record WWBs are the reason that this is turning into an east based event over the last month. Nino 1+2 has pulled just ahead of 1997-1998 and 3 and 3.4 are significantly ahead of 1997-1998. Nino 4 has been declining this month.

This is going to be a really extreme case study. Since these anomalies would allow the +30 C warm pool to get further east in the ENSO regions than it ever has been before.

 

[George001]

1 hour ago, bluewave said:

It would be interesting to know what caused the WWBs to be so much stronger this year than in 2023-2024 and 2015-2016? We noticed the record WWBs developing back in December north of Australia.

These record WWBs are the reason that this is turning into an east based event over the last month. Nino 1+2 has pulled just ahead of 1997-1998 and 3 and 3.4 are significantly ahead of 1997-1998. Nino 4 has been declining this month.

This is going to be a really extreme case study. Since these anomalies would allow the +30 C warm pool to get further east in the ENSO regions than it ever has been before.

 

If the model projections are correct this event will be the strongest in history by a wide margin. In my opinion this could actually make analog forecasting tougher, because even other super Ninos like 2015-2016, 1997-1998, 1982-1983 have a decent chance ending up a full 1C weaker than this event. I’d still use those years because they are the closest matches we have to this one, but this truly is a once in a lifetime Godzilla El Niño. I’m thinking we see almost a more extreme version of those super Nino years (eg even stronger STJ than 97-98), but I’m really not sure what the implications are. What are your thoughts? As a northern skier I’m not too happy about this developing Godzilla nino, but at the same time I’ve always been drawn to extreme weather events, so it will be interesting to keep following this and see how things play out regardless. This one has a good what 5 months left of strengthening and is already above 2C on the dallies for ENSO 3.4, 3C for ENSO 3, and 4C for ENSO 1.2, and the subsurface is much more impressive than even 97-98. So really no ambiguity here, this Nino already is a beast and will continue to break records.

[George001]

On 3/5/2026 at 9:30 PM, GaWx said:

Whew. All signs are increasingly pointing to a significant, if not strong to very strong, El Niño event. I'll have more to say in coming weeks & months, but for now I'll just say that this is increasingly likely to become a major regional-to-global climate driver in 2026-2027.

https://twitter.com/Weather_West/status/2029694752199754045?

 

 

My thoughts on this newest Euro 3.4 prog:

- They’ve generally been getting stronger the last few months.

-This run implies a super Nino peak.

-Keep in mind, however, that this is a prog of ONI, not RONI. RONI currently is ~0.5C lower. So, this implies Aug RONI to be near +2.1 -0.5 = +1.6.

-Keep in mind that the Euro has a warm bias in 3.4 of several tenths. So, a bc prog of RONI would very likely be only in the low +1s range in Sept.

Wow this was back in March, well done.  Interestingly the spring predictability barrier went the other way in that guidance was underestimating the strength of the El Niño. Imo this was a very well predicted event, it tipped its hand early and guidance already was flagging a potential super Nino in late winter/early spring. The biggest events really do tip their hand early, I recall the subsurface began warming as early as February. At the time I didn’t think much of it, but in hindsight that was a sign of things to come.

[GaWx]

 Going back to when I started following the CFSv2 AAM forecasts in Nov of 2023, the latest release (7/28/26 0Z) easily has THE strongest CFSv2 ensemble forecasted mean AAM of any I’ve ever seen/saved. The mean exceeds +2.5 by day 8 (Aug 5th), +3.0 by day 16 (Aug 13th), and +3.5 by day 20 (Aug 27th)! Although days 1-7 are a little shy of the strongest for week one of the forecast, all of the days day 8 to the end (day 32) are THE earliest periods in the forecast to get that strong. Granted these have a notable +AAM bias starting ~day 15 that rises further with time as I’ve noted a number of times. But regardless, this one is very strong by day 8, which is early enough to be fairly reliable, and this run is as I said the strongest of any run that I’ve seen as a whole, which bodes well for the chance for a very strong +AAM dominating at least through the 1st 1/2 of August: