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Winter 2025-26


Ji
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QBO should be negative.. March to April went from +11 to +6. When it changes phases it usually lasts at least 10 months.  -QBO with El Nino favors Stratosphere warmings, but ENSO looks to be more Neutral this Winter.  -QBO's with neg-Neutral ENSO have been known for cold December's then switching to warmer Jan-Feb (89-90, 05-06), but there's not enough data to say that for sure. 

My N. Atlantic SST method predicted +0.52 NAO last Winter (DJFM), and it ended up being +0.65. That makes it 15-5 on getting the right sign in real time since I came up with it in 2005. Also 11-9 within the estimated standard deviation of +0.54.  The index runs May-Sept, so it's too early to say where it's going right now. 

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December Natural Gas contract is almost right at $5... I usually say below $5 favors +NAO, and above $5 favors -NAO.. below $3 stronger +NAO, and above $8 stronger -NAO.. So right now almost exactly neutral on NAO prediction there. 

March '26 Natural Gas is $4.20.. a slight +NAO lean for later in the Winter. 

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QBO should be negative.. March to April went from +11 to +6. When it changes phases it usually lasts at least 10 months.  -QBO with El Nino favors Stratosphere warmings, but ENSO looks to be more Neutral this Winter.  -QBO's with neg-Neutral ENSO have been known for cold December's then switching to warmer Jan-Feb (89-90, 05-06), but there's not enough data to say that for sure. 
My N. Atlantic SST method predicted +0.52 NAO last Winter (DJFM), and it ended up being +0.65. That makes it 15-5 on getting the right sign in real time since I came up with it in 2005. Also 11-9 within the estimated standard deviation of +0.54.  The index runs May-Sept, so it's too early to say where it's going right now. 

How was is our chance for +pdo winter ?
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2 hours ago, Ji said:


How was is our chance for +pdo winter ?

We are still in decadal -PDO. The problem with that is that the index was so extremely negative the last few years, that even if there is a rebound, the subsurface is still pretty warm in the North Pacific PDO region. 

We were rebounding nicely in the PDO through the late Winter and March.. Now I think it has stabilized with the NOAA PDO index still near -1, and other readings are near -0.5 (Gawx knows more about this difference). 

Nino 1+2 being so warm in March rolled forward to a nice +PDO composite for November, but now Nino 1+2 has dropped to negative, so I don't know that, that is still valid. 

I would guess it stays near neutral, or slightly negative, but the only real strong Aleutian High pressure we have had since November was Jan 15 - Feb 10. Just one example of that really. It does seem to have changed a bit in the N. Pacific compared to the last few years. 

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October 2024 was the strongest monthly PDO on record, at -3.81. Rolled forward +15 months to 2 Winter's later, the tendency is slight -PNA, but a little bit more of a -NAO here (map is default positive, so it's the opposite)

1A-92.gif

The 1-year lead PDO doesn't appear to be that impactful for 15 months later (testing the subsurface PDO theory), but there is a slight -PNA signal. 

1aa-43.gif

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