2026-2027 El Nino

[snowman19]

These are the mechanisms causing the record-breaking WWB and accelerating El Niño development:
 

[michsnowfreak]

1 hour ago, 40/70 Benchmark said:

Only super event with normalish snowfall in my area...still warm, of course.

Are the only super events 1877-78, 1982-83, 1997-98, & 2015-16?

 

 

[nycwinter]

1 hour ago, michsnowfreak said:

Are the only super events 1877-78, 1982-83, 1997-98, & 2015-16?

 

 

global ocean temps from previous super el nino were cooler then what is forecasted to be this year super el nino. the 82 one global ocean temps were much cooler then normal..

[GaWx]

7 hours ago, michsnowfreak said:

Are the only super events 1877-78, 1982-83, 1997-98, & 2015-16?

 

 

Add to those using a peak of 2+ RONI for 1950+: 1888-9, 1957-8, 1965-6, 1972-3, 1991-2

[snowman19]

The SOI has crashed to strong negative. -33 today. The 30 day average is now negative

[PhiEaglesfan712]

Eric Webb's list has 1877-78, 1888-89, 1972-73, 1982-83, 1997-98, and 2015-16 listed as super el ninos. Those are the only years when both the ONI and RONI were above +2C. 

[40/70 Benchmark]

If we are going to go high end, I just assume the RONI not lag the ONI......I would prefer to take my chances with both in sync and try to pop a huge GOA low. I understand the risks with east-based and such, but keep in mind that I'm conceding a mild winter and am just looking for a window to get a good storm. My largest fear is some El nino/cool ENSO bastard-child, along the lines of 2023 that won't pop a se trough.

[snowman19]

4 minutes ago, 40/70 Benchmark said:

If we are going to go high end, I just assume the RONI not lag the ONI......I would prefer to take my chances with both in sync and try to pop a huge GOA low. I understand the risks with east-based and such, but keep in mind that I'm conceding a mild winter and am just looking for a window to get a good storm.

1982-83 was an east-based super El Niño and we had the megalopolis blizzard. That said, I do agree with you that if we do go super, which is looking increasingly likely, it’s going to be a mild winter 

[40/70 Benchmark]

5 minutes ago, snowman19 said:

1982-83 was an east-based super El Niño and we had the megalopolis blizzard. That said, I do agree with you that if we do go super, which is looking increasingly likely, it’s going to be a mild winter 

1982 would actually be a best-case scenario assuming a super El Nino, and may be a favored outcome considering the recent flip to more -WPO in the northern Pacific. It was mild, but had essentially normal snowfall throughout the northeast. I don't mean like 2015, which was good in the mid Atlantic due to one storm, but still sucked in the northeast. 

[bluewave]

Upper ocean heat is getting off to a record start for March. So the model forecasts of an ONI getting above +2.0° would make sense if the El Niño continues on a similar trajectory into June past the spring forecast barrier.

This could be the first ONIs above 2.0° only 3 years apart which could have major ramifications for the global climate well beyond what happens next winter. Since we never had this rapid a global temperature increase over such a short period.

With  the big temperature jump in 2023-2024 the CONUS has had the #1 warmest winter in 2023-2024 and the #2 warmest winter in 2025-2026. Plus all the record warm winters following the 2015-2016 El Niño.

 

[40/70 Benchmark]

2 minutes ago, bluewave said:

Upper ocean heat is getting off to a record start for March. So the model forecasts of an ONI getting above +2.0° would make sense if the El Niño continues on a similar trajectory into June past the spring forecast barrier.

This could be the first ONIs above 2.0° only 3 years apart which could have major ramifications for the global climate well beyond what happens next winter. Since we never had this rapid a global temperature increase over such a short period.

With  the big temperature jump in 2023-2024 the CONUS has had the #1 warmest winter in 2023-2024 and the #2 warmest winter in 2025-2026. Plus all the record warm winters following the 2015-2016 El Niño.

Have you considered the possibility that it may never snow again south of Bridgeport, CT if we get another super El Nino?

[Great Snow 1717]

2 minutes ago, bluewave said:

Upper ocean heat is getting off to a record start for March. So the model forecasts of an ONI getting above +2.0° would make sense if the El Niño continues on a similar trajectory into June past the spring forecast barrier.

This could be the first ONIs above 2.0° only 3 years apart which could have major ramifications for the global climate well beyond what happens next winter. Since we never had this rapid a global temperature increase over such a short period.

With  the big temperature jump in 2023-2024 the CONUS has had the #1 warmest winter in 2023-2024 and the #2 warmest winter in 2025-2026. Plus all the record warm winters following the 2015-2016 El Niño.

"Best case "scenario as things stand right now is strong...worse case is SSSSUUUPPPEERRR which may obliterate winter in the east. Perhaps on the scale of winter 25-26 in the west.

And great point regarding the potential implications well beyond winter 26-27.

 

[bluewave]

51 minutes ago, 40/70 Benchmark said:

Have you considered the possibility that it may never snow again south of Bridgeport, CT if we get another super El Nino?

Not really sure yet what would happen to benchmark storm tracks following another rapid warming event so soon after 2023-2024. Would probably depend on the SST state across the rest of the ocean basins. The record early SSW back in November really got the ball rolling in the right direction this past winter.

Around NYC metro we have been in an all or nothing snowfall regime since the mid 1990s. So every year with a benchmark KU like this past winter has gone to at or above the long term average snowfall.

Very few 18-30” seasons anymore which were common from the 1960s to 1990s. Most years without a benchmark event like 22-23, 23-24, and 24-25 finished up with under 18” across multiple locations. 

Back in the 1840s to early 1870s a recently discovered excellent set of long term weather observations showed the average annual snowfall at Newark in the low 40s over a 30 year period. This gradually declined into the mid 20s by the early 1990s.

We had a big bounce back decade during the 2010s which was built on a record number of benchmark KU snowstorms. From 2019 to 2025 the benchmark track was largely absent so we had numerous very low snowfall years. 

This winter started out with an outstanding clipper pattern in December which pretty much maxed out the potential of what the Northern Stream could do if everything went just right. Then the Northern Stream finally relaxed for around 30 days from late January until late February. So only one month of relaxation yielded the record KU event in late February. 

March reverted to the dominant Northern Stream pattern which had resulted in the lowest March snowfall over 7 consecutive seasons around NYC Metro from 2020-2026. 

So taking the very long view has given us a steady decline since the 1840s in seasonal snowfall around NYC Metro with bounce back periods from time to time. 

No matter how warm this El Niño gets next winter, I will never give up hope for bounce back seasons and potential benchmark events from time to time. The big question is what type of interval of reoccurrence will we be looking at?

Warm winters like 2015-2016 and 2016-2017 were proof of concept that we could get great benchmark storms even in a warm season. So it will just come down to having the benchmark tracks pushing back from time to time against the strong Northern Stream tendency we had since 2019. 

 

[40/70 Benchmark]

33 minutes ago, Great Snow 1717 said:

"Best case "scenario as things stand right now is strong...worse case is SSSSUUUPPPEERRR which may obliterate winter in the east. Perhaps on the scale of winter 25-26 in the west.

And great point regarding the potential implications well beyond winter 26-27.

 

Maybe in terms of temps, but I doubt in terms of snowfall. 1982, 1997 and 2015 all had one great storm.