2026-2027 Record-breaking El Nino

[LongBeachSurfFreak]

The Nino is likely going to greatly help some ski resorts this winter.

Maybe some of the western resorts with base elevations above 8,000’. East coast base elevations are generally 1500-2000’ and will be overwhelmed with pacific warmth during prime snow making in November and December. The vast majority of revenue is MLK weekend and prior. 2015 provides a perfect case study in what happens when December is +10.


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[Brian5671]

1 hour ago, michsnowfreak said:

Any ski resorts that struggled the last few cold winters in the Great Lakes/Northeast have no business being in business in the first place.

Our local hills had their best year ever last yr and the year prior was a runner up.    Bad years are baked into their business model.

[Brian5671]

26 minutes ago, LongBeachSurfFreak said:

Maybe some of the western resorts with base elevations above 8,000’. East coast base elevations are generally 1500-2000’ and will be overwhelmed with pacific warmth during prime snow making in November and December. The vast majority of revenue is MLK weekend and prior. 2015 provides a perfect case study in what happens when December is +10.


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Colorado should clean up this year after a disastrous year last yr-never saw it so bad there in over 30 years of going.

[LakePaste25]

there’s quite a few ski resorts out west that are below 7k’ and probably won’t do too well either. The higher up ones will def cash in just like the Andes are in Chile. 

[Keith Central PA]

40 minutes ago, LongBeachSurfFreak said:

Maybe some of the western resorts with base elevations above 8,000’. East coast base elevations are generally 1500-2000’ and will be overwhelmed with pacific warmth during prime snow making in November and December. The vast majority of revenue is MLK weekend and prior. 2015 provides a perfect case study in what happens when December is +10.


.

I doubt that this December will be +10..thats a once in a lifetime warmth..+3-5 seems more reasonable and in December it can snow especially in New England away from the coast.

[LongBeachSurfFreak]

I doubt that this December will be +10..thats a once in a lifetime warmth..+3-5 seems more reasonable and in December it can snow especially in New England away from the coast.

I’m thinking 5-15 above, the upside potential is even higher the 2015. I do think do to the unprecedented level of energy that will be ejected into the subtropical jet there could be some surprises. As others have said it just takes the right timing. But overall the early winter warmth is likely historic if not record breaking.


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[Newman]

I haven't been active in this thread so apologize if it's already been shared before, but Dr. Jonathan Wall has a great project developed on his website at https://snow.wall.cloud/

You can dive really deep into and compare statistical significance of various teleconnections for a few different snowfall criteria (i.e. trace of snow at 10% or more of stations, 25% of stations measuring 0.1" or more snow, total event coverage or magnitude of snow totals, etc), and all of this broken down by NWS CWAs. But what's neat is you can also break it down further with these various teleconnections during El Nino, neutral, and La Nina.

Here is an example between BOX and PHL CWAs in an El Nino winter for the PNA. The PHL CWA leans towards/favors +PNA for number of qualifying days with at least 25% of stations measuring snow. Meanwhile, BOX weakly leans towards/favors -PNA. The numbers on the maps are all absolute differences between percentages. Of course, the caveat is that there are some outliers in both situations and it's not consistent amongst all measurable snowfall days. In fact (and you can find this on the website) the most statistically significant teleconnection is a -EPO across both CWAs (most significant when selecting "all winters" and not just separating out ENSO):

 

Here is another example but with QBO during El Nino just for shits and giggles. PHL actually leans towards +QBO for number of qualifying days with measurable snow at 25% of eligible stations (I'll have to look into the details of the data here, I wonder if there's some bias from big dogs that formed during +QBO/+ENSO seasons) and eastern BOX leans towards -QBO but western BOX leans towards +QBO. Again, very very important to note this is not gospel and there are outliers that prove snowstorms can happen in either phase of QBO.

Either way, cool website and wanted to share. All of the details should be there on the site. From the site: "This is a descriptive historical phase comparison: each DJF winter is grouped by its mean index phase. Red favors positive phase, blue negative. The shading estimates the station-rate pattern between qualified stations."

[GaWx]

48 minutes ago, Newman said:

I haven't been active in this thread so apologize if it's already been shared before, but Dr. Jonathan Wall has a great project developed on his website at https://snow.wall.cloud/

You can dive really deep into and compare statistical significance of various teleconnections for a few different snowfall criteria (i.e. trace of snow at 10% or more of stations, 25% of stations measuring 0.1" or more snow, total event coverage or magnitude of snow totals, etc), and all of this broken down by NWS CWAs. But what's neat is you can also break it down further with these various teleconnections during El Nino, neutral, and La Nina.

Here is an example between BOX and PHL CWAs in an El Nino winter for the PNA. The PHL CWA leans towards/favors +PNA for number of qualifying days with at least 25% of stations measuring snow in El Nino. Meanwhile, BOX weakly leans towards/favors -PNA. Of course, the caveat is that there are some outliers in both situations and it's not consistent amongst measurable snowfall days. In fact (and you can find this on the website) the most statistically significant teleconnection is a -EPO across both CWAs (most significant when selecting "all winters" and not just separating out ENSO):

 

Here is another example but with QBO during El Nino just for shits and giggles. PHL actually leans towards +QBO for number of qualifying days with measurable snow at 25% of eligible stations (I'll have to look into the details of the data here, I wonder if there's some bias from big dogs that formed during +QBO/+ENSO seasons) and eastern BOX leans towards -QBO but western BOX leans towards +QBO. Again, very very important to note this is not gospel and there are outliers that prove snowstorms can happen in either phase of QBO.

Either way, cool website and wanted to share. All of the details should be there on the site. From the site: "This is a descriptive historical phase comparison: each DJF winter is grouped by its mean index phase. Red favors positive phase, blue negative. The shading estimates the station-rate pattern between qualified stations."

 Thanks for posting that. Regarding the PNA based on analyses I’ve done on snowfall for SE cities like RDU and ATL, a +PNA is the #1 most correlated index to snow in the SE. Since El Niño and +PNA are well correlated, having El Niño on average tends to be good relative to other ENSO for SE snow chances in general.

[bluewave]

 

 

[mitchnick]

On 9/7/2026 at 12:13 PM, GaWx said:

The daily WCS PDO has risen back substantially the last 7 days ending yesterday with it up to -0.9, the highest since way back on July 2nd, vs ~-1.65 one week earlier:

-.83 today

[Ephesians2]

2 hours ago, mitchnick said:

-.83 today

The warm pool definitely isn't as extreme as it was a month ago

[GaWx]

 Here’s the preliminary winter outlook from pro met. Chris Martz:

here is my preliminary thinking. . . As y'all probably know by now because of the endless hysteria in the news cycle, we are in an El Niño, which is just the warm phase of the larger El Niño–Southern Oscillation (ENSO). This year, the developing El Niño is unusually intense, and it is expected to officially be a “very strong” El Niño by early winter at the latest. This is marked by very warm sea surface temperatures in the equatorial Pacific Ocean.

 The news media and the United Nations have spun this as some sort of crazy event that will “turbocharge” extreme weather all over the globe, but that's not really how it works. Now, normally in the tropical Pacific Ocean, easterly wind stress associated with the Walker Circulation imparted on the sea surface acts to pile warm water near the surface in the western half of the basin; that is, closer to Asia. This pushes the thermocline down towards the west as warm water pools up north of the Maritime Continent and east of the Philippines. But during El Niño, the easterlies weaken or temporarily reverse (westerly wind bursts), which causes that pool of warm water to slosh back east. That's what's happening right now.
 

There are a lot of meteorological factors to consider when it comes to predicting long-range temperatures, precipitation, and storm tracks. But this year, this “very strong” El Niño will play a dominant role I think as it has in years past (e.g., 1982–83, 1997–98, and 2015–16). Those are my top post-1950 analogs, and I added 1972–73 into the mix as it behaved similarly to the others, although it was only a “strong” El Niño at peak intensity. 1827–28 and 1877–78 would have been good analogs too, but we don't have enough climate data from back then to work with.
 

A key feature of “very strong” El Niño events is that wintertime temperatures are particularly mild relative to average. This is pronounced in the Upper Plains / Midwest and Great Lakes / Northeast. Temperatures across the Desert Southwest and Four Corners region, however, typically run below average. The southeast can swing either way, but generally winds up near “average” (and I use scare quotes there because the weather is rarely “average”).
 

 However, these exceptionally mild temperatures do not necessarily persist all winter. In fact, most of this composite is due to “blowtorch” Decembers. And I do expect December to end up 5–10°F above average in the areas you see orange and red contours in the first analog composite map I made below. But the roaring Pacific Jet typically relaxes from mid-January through mid-February, so temperatures will tumble a bit closer to “seasonable.” If this El Niño were weaker, there'd be a good chance of a frigid December in the east. But I doubt that's going to happen.
 

As far as precipitation goes, well, there should be an active subtropical jet stream. So, air parcels moving from west-to-east will tap into Gulf moisture and then be advected northward into the southeast. I expect a lot of rain in the Gulf Coast states (Texas to Florida) and then northward up the east coast into the DMV. Similarly, the western U.S. should expect some major drought relief due to atmospheric river events. After a near-record low snowpack last winter, the ski resorts will be back in business. Elsewhere, it will likely be a bit drier than normal due to persistent high-pressure ridging over the northern flank of the country. Storm tracks are going to favor the southern states.
 

With respect to snowfall, overall, I do expect less of it nationwide outside of high elevation areas simply due to higher-than-average temperatures. But I cannot rule out ONE crippling blizzard in the Mid-Atlantic or in the southeast. It happened in the southeast (Florida, Georgia, and Carolina coastline) in February 1973 and in the lower Mid-Atlantic (Virginia, D.C., Maryland, and southeastern Pennsylvania) in both February 1983 and January 2016. However, it did not happen in 1827–28 or 1877–78 (I checked NOAA NCEI FORT data) or in 1997–98.

So, whether or not we get the “big one” remains up in the air for now. But it will be that one storm that will ultimately determine where the seasonal snowfall will stand (above / below climatology) in the southeast and Mid-Atlantic. If it occurs, many folks will get their seasonal spoonful of snow in one dumping. If it does not occur, it's just going to be a wet winter.

 

 

[mitchnick]

51 minutes ago, Ephesians2 said:

The warm pool definitely isn't as extreme as it was a month ago

And the trend is our friend if you want it to keep rising.

[GaWx]

The CFSv2 progged RONI peak continues to drop steadily with more drops likely:

7/22-31: ASO/OND +3.5

8/9-18: OND +3.45

8/19-28: OND +3.2

 

8/29-9/7: OND +3.0 with most of the blue lines (most recent 8 runs) lower

[bluewave]

The CFS really missed how east based this event has become. The most recent update for this week is a record breaking +4.6 in Nino 1+2. The forecast for early September was only around +3.3. 

 

[EasternLI]

Current WWB verifying a tick stronger vs what models had advertised. Same thing happened with the last one too. 

[LakePaste25]

Right on schedule, the northern hemisphere pacific jet is set to seasonally strengthen and the ridging is nearly nonexistent. It’s possible we see the -PDO finally flip by next month. The stronger mid latitude jet and the coastally trapped kelvin waves going up the west coast will both act to flip the PDO to positive. 

 

 

[mitchnick]

Cfs2 still advertising the mother of all WWB's this Niño for late October into early November. 

[40/70 Benchmark]

2 hours ago, bluewave said:

The CFS really missed how east based this event has become. The most recent update for this week is a record breaking +4.6 in Nino 1+2. The forecast for early September was only around +3.3. 

 

Just about all guidance has, but especially the CANSIPS and JAMSTEC....take that data with a grain of salt, as I have been advising all summer.

[bluewave]

2 minutes ago, 40/70 Benchmark said:

Just about all guidance has, but especially the CANSIPS and JAMSTEC....take those data with a grain of salt, as I have been advising all summer.

The ECMWF has been the closest but even it’s behind the curve on how east based this has become. The summer WWB pattern was stronger than 1997. So we have the historic warm pool now east of the Dateline. 
 

 

[40/70 Benchmark]

16 minutes ago, bluewave said:

The ECMWF has been the closest but even it’s behind the curve on how east based this has become. The summer WWB pattern was stronger than 1997. So we have the historic warm pool now east of the Dateline. 
 

 

Absolutely.

[forkyfork]

7 hours ago, GaWx said:

The CFSv2 progged RONI peak continues to drop steadily with more drops likely:

7/22-31: ASO/OND +3.5

8/9-18: OND +3.45

8/19-28: OND +3.2

 

8/29-9/7: OND +3.0 with most of the blue lines (most recent 8 runs) lower

that's because it's east of 3.4 as bluewave just showed us. be careful what you wish for <3

[40/70 Benchmark]

I was never wishing for a lower RONI because given how warm the Pacific basin is, I think that could predispose the hemisphere to residual MC influence in the mid latitudes, as we are still seeing signs of those competing forces despite the magnitude of El Nino. 

[40/70 Benchmark]

18 hours ago, Newman said:

I haven't been active in this thread so apologize if it's already been shared before, but Dr. Jonathan Wall has a great project developed on his website at https://snow.wall.cloud/

You can dive really deep into and compare statistical significance of various teleconnections for a few different snowfall criteria (i.e. trace of snow at 10% or more of stations, 25% of stations measuring 0.1" or more snow, total event coverage or magnitude of snow totals, etc), and all of this broken down by NWS CWAs. But what's neat is you can also break it down further with these various teleconnections during El Nino, neutral, and La Nina.

Here is an example between BOX and PHL CWAs in an El Nino winter for the PNA. The PHL CWA leans towards/favors +PNA for number of qualifying days with at least 25% of stations measuring snow. Meanwhile, BOX weakly leans towards/favors -PNA. The numbers on the maps are all absolute differences between percentages. Of course, the caveat is that there are some outliers in both situations and it's not consistent amongst all measurable snowfall days. In fact (and you can find this on the website) the most statistically significant teleconnection is a -EPO across both CWAs (most significant when selecting "all winters" and not just separating out ENSO):

 

Here is another example but with QBO during El Nino just for shits and giggles. PHL actually leans towards +QBO for number of qualifying days with measurable snow at 25% of eligible stations (I'll have to look into the details of the data here, I wonder if there's some bias from big dogs that formed during +QBO/+ENSO seasons) and eastern BOX leans towards -QBO but western BOX leans towards +QBO. Again, very very important to note this is not gospel and there are outliers that prove snowstorms can happen in either phase of QBO.

Either way, cool website and wanted to share. All of the details should be there on the site. From the site: "This is a descriptive historical phase comparison: each DJF winter is grouped by its mean index phase. Red favors positive phase, blue negative. The shading estimates the station-rate pattern between qualified stations."

Cool site...def. adding this to my arsenal.

Thanks.

[GaWx]

3 hours ago, forkyfork said:

that's because it's east of 3.4 as bluewave just showed us. be careful what you wish for <3

I know ‘26 became the most E based of any Nino on record in early Sep as I posted that here 2 days ago:

 
 Although 1+2 has warmed in Sep, it like RONI has also fallen in OND fwiw though by not as much (0.3 vs 0.5) making it slightly more E based in OND than it had before:

Aug 9-18: 1+2 OND +4.2

 

Aug 19-28: 1+2 OND +4.0

Aug 29-Sep 7: 1+2 OND +3.9

[GaWx]

1 hour ago, 40/70 Benchmark said:

I was never wishing for a lower RONI because given how warm the Pacific basin is, I think that could predispose the hemisphere to residual MC influence in the mid latitudes, as we are still seeing signs of those competing forces despite the magnitude of El Nino. 

 
 The ONI peak in OND fell by the same 0.5 over the same period:

Aug 1-10: ONI peak +4.15

Aug 30-Sep 8: ONI peak +3.65 and likely to fall further just like RONI as per the location of the blue lines

 So, the difference between the peaks of ONI and RONI didn’t widen.

[40/70 Benchmark]

10 minutes ago, GaWx said:

 
 The ONI peak in OND fell by the same 0.5 over the same period:

Aug 1-10: ONI peak +4.15

Aug 30-Sep 8: ONI peak +3.65 and likely to fall further just like RONI as per the location of the blue lines

 So, the difference between the peaks of ONI and RONI didn’t widen.

Makes sense since the drop is due to the El Nino being focused east of 3.4 right now, rather then any type of reduced expression of El Nino across the hemisphere

[LakePaste25]

17 minutes ago, 40/70 Benchmark said:

Makes sense since the drop is due to the El Nino being focused east of 3.4 right now, rather then any type of reduced expression of El Nino across the hemisphere

Yup. It’s consistent with it undershooting 1+2 

[mitchnick]

Meanwhile, for those planning on a fishing trip off Japan, PDO up to -.73 as of yesterday. 

[GaWx]

The MEI v2 was just released for JA: +2.5 vs +2.4 for JJ. That’s the 2nd bimonthly in a row at a record high for the bimonth (back to 1979). The record high for any bimonth is +2.9.

 Here’s the rundown for JAs of +0.5+:

2026: +2.5

1997: +2.3

2015: +2.0

1982: +1.9

1987: +1.5

2002: +1.0

1986: +1.0

1994: +0.9

2004: +0.8

2009: +0.6

2006: +0.6

1993: +0.6

2023: +0.5

2018: +0.5

1979: +0.5