2026-2027 Record-breaking El Nino

[GaWx]

36 minutes ago, LakePaste25 said:

PNA probably stays ++ all winter. Remember one of the measuring points lies in the SE US, so the SE trough combined with the GOA low centered just offshore of western Canada will keep it positive. 

Looking at only Ninos of +1.4+ (per RONI), there have been 10 others since 1950 but only one (1997) had a +PNA dominant first half of Nov like GEFS says 2026 is going to have. GEFS is suggesting ~+1.0 (after adjusting downward for bias) for 11/1-15/2026. How does this compare to the other 10 actual 11/1-15?

2023: -0.1

2015: -0.2

2009: -0.3

1997: +1.2

1991: +0.1

1986: -0.9

1982: -0.3

1972: +0.1

1965: -0.5

1957:  0.0

 I wonder if this strong early Nov +PNA in 2026 is largely due to how E based it is being that 1997 was so E based early.
 

https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.pna.index.b500101.current.ascii

[40/70 Benchmark]

1 hour ago, snowman19 said:

Even if this turns into a true SSWE (major or minor) and a wind reversal, it has to downwell into the bottom of the stratosphere and fully couple with the troposphere, otherwise it’s completely useless
Eric Webb had this to say:

 

1 hour ago, snowman19 said:

Even if this turns into a true SSWE (major or minor) and a wind reversal, it has to downwell into the bottom of the stratosphere and fully couple with the troposphere, otherwise it’s completely useless.

Eric Webb had this to say:
 

Of course it's going to be masked by the strongest El Nino in history in the seasonal mean, the question is whether it portends a favorable stretch of two during the winter, which often makes the difference between a bottom-dwelling winter in terms of snowfall and a middling season.

[BlizzardWx]

Good agreement on that positive PNA to start out November among all modeling systems. (Yeah I know I need to clean this graphic up a bit but I guess it'll get the job done for today)

[GaWx]

14 minutes ago, BlizzardWx said:

Good agreement on that positive PNA to start out November among all modeling systems. (Yeah I know I need to clean this graphic up a bit but I guess it'll get the job done for today)

This is just like the strongly E based 1997 was in the first half of Nov, but is unlike the 9 other strong+ ones which had either neutral or -PNA then.