2026-2027 Record-breaking El Nino

[FPizz]

57 minutes ago, EastonSN+ said:

Its a risk / reward climate here. The chances of breaching 95/96 for the snowiest winter is also on the table any given year due to our proximity to the ocean (noreasters) and latitude. I can see both happening in my lifetime.

In fact the snowiest winter was only 2 years prior to the latest snowfall year of 97/98

Great post.

[bluewave]

7 hours ago, GaWx said:

You said in your earlier post that I responded to:

“It was a+2.1 event up until a few years ago before the CPC dropped it to +1.8. So until very recently it was rated as a lower end super.”

1. The CPC officially now has 72-3 at +2.0, not +1.8, as I showed, because ONI hasn’t been official since Feb.

2. You said,

“With an event as extreme as this RONI can make the event seem weaker than it actually is.”

 No, it’s not RONI making the event seem weaker. It’s ONI making the current Nino seem stronger than it really is due to GW. That’s the reason the RONI exists.
 
 ONI isn’t per NOAA and BoM the absolute strength of the 26 Nino, itself, because that exaggerates the strength due to adding the increasing warming from GW to the warming from El Niño, itself. The warming from El Niño, itself, is what RONI measures.

 I’ll use a hypothetical example to illustrate better:

-Say that the avg worldwide tropical ocean 30 year SSTa is at +1.0 vs its prior 30 year avg. Now say that 3.4 is also at +1.0 vs its own 30 yr avg. Per ONI it’s a +1.0 Nino. But per RONI it’s at 0.0/neutral because it’s measuring the contrast of the 3.4 anom vs the anomaly of the tropical waters. NOAA and BoM at the least have determined that +1.0 is deceptively high in this example because 3.4 is up to +1.0 due to GW, not because of El Niño. 

 Measuring the true strength of ENSO means measuring the contrast with surrounding tropical waters. If 3.4 and avg tropical waters are both at +1.0c there’s essentially no contrast (no relatively warm tongue in 3.4) and thus no Nino. A contrast is needed to have a Nino (or a Niña) per the official RONI. With no contrast like in this example it is neutral.

@mitchnick

The original paper that RONI is based on discusses it mostly being developed to prevent weak La Nina’s from getting lost in the mix rather than some deficiency in measuring super El Niño events.

Plus the weaker El Niños not being able to fully couple. Both instances were also a function of the record WPAC warm pool. 

So the ONI and the absolute SSTs are a good measure of how intense this event is becoming.

My original ONI post was correct as the original ONIs we relied on for many years into the 2010s had the ONI with the 1972-1973 event peaking at the +2.0 to +2.1 range. So a lower end super El Niño event. 

 

[forkyfork]

wait, so this is the least appropriate type of enso event for using RONI? lol

[LakePaste25]

RONI vs ONI are not important to me this year because both are well above the threshold for super on the daily index, and will be for the 3 month index eventually. 

for records, I only care about absolute SSTs. similar to how we measure record heatwaves based on setting the absolute temperature of say, 105 degrees, not the “record anomaly.” We are currently above record SSTs in the 3.4 region. 

 

[forkyfork]

8 hours ago, mitchnick said:

So anything that dares to minimize CC can't be better. Typical coming from the paid CC spokesman, Ben Knoll.

says the person doing exxon's work for free

[mitchnick]

10 minutes ago, forkyfork said:

says the person doing exxon's work for free

Well considering of all the people in the world that die from temperature extremes, cold causes outnumber warm by a ratio of 9-to-1, I must be doing the right thing for humanity. 

[OSUmetstud]

We really giving the flu and other cold viruses credit for cold deaths lol. 

[OSUmetstud]

We can debate oni v roni all we want but you still have at least four different SST analyzes and climatologies and roni adjustments and scaling at the bom, cpc, ukmet, and ecmwf. So good luck!

[OSUmetstud]

Nino 1.2 really went for broke this past month. ECMWF September forecast and spread overlaid with verification. 

[GaWx]

1 hour ago, bluewave said:

The original paper that RONI is based on discusses it mostly being developed to prevent weak La Nina’s from getting lost in the mix rather than some deficiency in measuring super El Niño events.

Plus the weaker El Niños not being able to fully couple. Both instances were also a function of the record WPAC warm pool. 

So the ONI and the absolute SSTs are a good measure of how intense this event is becoming.

My original ONI post was correct as the original ONIs we relied on for many years into the 2010s had the ONI with the 1972-1973 event peaking at the +2.0 to +2.1 range. So a lower end super El Niño event. 

 

1. The concept of RONI applies to all ENSO.

2. ONI is a good measure of the combo of GW and ENSO. RONI is a good measure of ENSO, alone.

3. NOAA officially currently has 1972-3 at +2.0.

[GaWx]

1 hour ago, LakePaste25 said:

RONI vs ONI are not important to me this year because both are well above the threshold for super on the daily index, and will be for the 3 month index eventually. 

for records, I only care about absolute SSTs. similar to how we measure record heatwaves based on setting the absolute temperature of say, 105 degrees, not the “record anomaly.” We are currently above record SSTs in the 3.4 region. 

 

 We agree that the absolute 3.4 temp has been blowing away its record since summer on OISST. But a portion of that difference from prior records is obviously due to the globe being near its warmest on record:

-Avg trop ocean warming since 1997 is ~0.6C. So, without any of that warming, 2026 OISST would still be warmer going back to Sep 1st. But the diff would be ~0.6 smaller.

-Avg warming since 1982 ~~0.8C. So, it would still be warmer than 82 w/o the GW since then but would be ~0.8 smaller diff.

-It has warmed ~0.3C since ‘15. So, even after taking into acct GW, it would still be blowing away ‘15.

-It is pulverizing ‘23 as that was a much weaker Nino at this point vs the other 3 and there’s been some GW since then.

-Also, keep in mind that cyclonicwx’s OISST graph has been ~0.4 warmer than NOAA’s OISST the last 2 months. They used to be within ~0.1 apart on avg. I don’t know why, but it’s possible Alex’s OISST has been skewed a few tenths higher due to a bug for all I know.

-Even after taking into account both a possible bug in Alex’s graph and GW, ‘26 looks like it would still be at a record in 3.4.

[OSUmetstud]

NOAA Offical RONI ERSSTv6 released for September and JAS. 

2.08C and 1.69C

[GaWx]

 The NOAA ERSSTv6 Sep PDO was -0.74:

-As expected based on WCS, this was less negative than Aug’s -1.12

-This is the least neg Sep since 2019’s +0.44.

-2023 Sep was way down at -2.52!

-This is the 3rd month in a row that NOAA came in less negative than avg of WCS dailies, which was ~-1.0 in Sep

- The NOAA August PDO had come in at -1.12 vs the WCS avg of ~-1.55.

https://www.ncei.noaa.gov/pub/data/cmb/ersst/v5/v6/index/ersst.v6.pdo.dat