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Wintry Winter 2024-25 Discussion

lexxnchloe said:
JBs detailed winter forecast

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JB is already doing his typical monkey wrenching when he doesn’t forecast a cold snowy winter so as to take the emphasis off of his AN winter forecast and keep people clicking. Now he’s harping on a cold Dec. I wouldn’t be surprised if he like he did in 2020 later revises his winter forecast colder.
 
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GaWx said:
JB is already doing his typical monkey wrenching when he doesn’t forecast a cold snowy winter so as to take the emphasis off of his AN winter forecast and keep people clicking. Now he’s harping on a cold Dec. I wouldn’t be surprised if he like he did in 2020 later revises his winter forecast colder.
Click to expand...
Don’t he always lol
 
Webberweather53 said:
My prediction for this winter: more tornado outbreaks than snowstorms.
Click to expand...

I'm obviously (kind of) pulling everyone's legs here. In all seriousness, here a few of my way too early thoughts on this winter:

We're probably headed for a weak, if not moderate La Niña this winter (in fact one is already developing). However, I have a suspicion that this year may not follow the canonical mold of suppressed Aleutian ridge/-PNA/SE US ridge for large stretches of the winter, especially in Dec-Jan.

For one thing, as is often the case w/ weaker, first year La Ninas like this year, this La Niña looks "east-based", which tends to actually favor a negative NAO.

E.g.: Impacts of the two types of La Niña on the NAO during Winter

sstamean_enso.png

ps2png-worker-commands-b85dd8d98-v5tgr-6fe5cac1a363ec1525f54343b6cc9fd8-g5gr7_wu.png

GWvcZI5bUAAMn-c.jpeg


Also, this year is squarely in the westerly phase of the QBO, which normally shifts the Aleutian ridge poleward towards Alaska, increasing the risk for -EPO/-WPOs (HM/Anthony Masiello has talked about this for over a decade now).

The other thing that seems to be in our corner this year is the fact that we're in an increasingly westerly QBO: https://psl.noaa.gov/data/correlation/qbo.data

A west QBO coupled with solar maximum, and a La Niña is arguably the most favorable QBO, Solar, & ENSO combination historically for a sudden stratospheric warming event, which would support the potential for -NAO this winter.

E.g. Labitzke et al (2006) found that of the 11 west qbo sudden stratospheric warming events that occurred prior to the mid-2000s or so, 10 of those 11 happened during solar max (like this year!) https://journals.ametsoc.org/view/journals/atsc/64/4/jas3883.1.xml

Here's how cool ENSO winters w/ varying QBO behavior compare over the Northern Hemisphere since 1953:

500mb pattern for cool neutral - Nina winters w/ west -> east transitioning QBOs before winter. Pretty canonical Nina pattern here w/ slightly suppressed Aleutian Ridge & SE US ridge w/ +NAO/+TNH.

GWvysvkbIAAIcti.jpeg


500mb pattern for cool neutral - Nina winters w/ east -> west transitioning QBOs before winter (like this year). Notice the Aleutian Ridge is shifted poleward & there's a -NAO, with a much more suppressed SE US ridge.

GWvysvda4AAHlAu.jpeg


500mb difference composite between the most recent 10 east -> west & west -> east QBO cool ENSO winters basically yields the NAO pattern. This means that -NAO is much more favored when we're transitioning from east to west QBO w/ cool ENSO (like this year). This is aside from the fact that as mentioned previously solar max, & of course warm Atlantic are all also trying to help favorably influence our chances for a -NAO this coming winter.

GWvzDApbAAABEZ2.jpeg


All told, although it's pretty early in the grand scheme of things, I'm much more cautiously optimistic than folks for what this winter may hold over the East & Southeast US than say Joe Bastardi. Compared to last winter, I don't see this playing as much into the canonical ENSO script as much & I'm much less confident in a "torch" happening, at least through December & January (February might be a different story).
 
Webberweather53 said:
I'm obviously (kind of) pulling everyone's legs here. In all seriousness, here a few of my way too early thoughts on this winter:

We're probably headed for a weak, if not moderate La Niña this winter (in fact one is already developing). However, I have a suspicion that this year may not follow the canonical mold of suppressed Aleutian ridge/-PNA/SE US ridge for large stretches of the winter, especially in Dec-Jan.

For one thing, as is often the case w/ weaker, first year La Ninas like this year, this La Niña looks "east-based", which tends to actually favor a negative NAO.

E.g.: Impacts of the two types of La Niña on the NAO during Winter

View attachment 150740

View attachment 150738

View attachment 150739


Also, this year is squarely in the westerly phase of the QBO, which normally shifts the Aleutian ridge poleward towards Alaska, increasing the risk for -EPO/-WPOs (HM/Anthony Masiello has talked about this for over a decade now).

The other thing that seems to be in our corner this year is the fact that we're in an increasingly westerly QBO: https://psl.noaa.gov/data/correlation/qbo.data

A west QBO coupled with solar maximum, and a La Niña is arguably the most favorable QBO, Solar, & ENSO combination historically for a sudden stratospheric warming event, which would support the potential for -NAO this winter.

E.g. Labitzke et al (2006) found that of the 11 west qbo sudden stratospheric warming events that occurred prior to the mid-2000s or so, 10 of those 11 happened during solar max (like this year!) https://journals.ametsoc.org/view/journals/atsc/64/4/jas3883.1.xml

Here's how cool ENSO winters w/ varying QBO behavior compare over the Northern Hemisphere since 1953:

500mb pattern for cool neutral - Nina winters w/ west -> east transitioning QBOs before winter. Pretty canonical Nina pattern here w/ slightly suppressed Aleutian Ridge & SE US ridge w/ +NAO/+TNH.

View attachment 150741


500mb pattern for cool neutral - Nina winters w/ east -> west transitioning QBOs before winter (like this year). Notice the Aleutian Ridge is shifted poleward & there's a -NAO, with a much more suppressed SE US ridge.

View attachment 150743


500mb difference composite between the most recent 10 east -> west & west -> east QBO cool ENSO winters basically yields the NAO pattern. This means that -NAO is much more favored when we're transitioning from east to west QBO w/ cool ENSO (like this year). This is aside from the fact that as mentioned previously solar max, & of course warm Atlantic are all also trying to help favorably influence our chances for a -NAO this coming winter.

View attachment 150742


All told, although it's pretty early in the grand scheme of things, I'm much more cautiously optimistic than folks for what this winter may hold over the East & Southeast US than say Joe Bastardi. Compared to last winter, I don't see this playing as much into the canonical ENSO script as much & I'm much less confident in a "torch" happening, at least through December & January (February might be a different story).
Click to expand...

I mean it can't be any worse.


Sent from my iPhone using Tapatalk
 
Webberweather53 said:
I'm obviously (kind of) pulling everyone's legs here. In all seriousness, here a few of my way too early thoughts on this winter:

We're probably headed for a weak, if not moderate La Niña this winter (in fact one is already developing). However, I have a suspicion that this year may not follow the canonical mold of suppressed Aleutian ridge/-PNA/SE US ridge for large stretches of the winter, especially in Dec-Jan.

For one thing, as is often the case w/ weaker, first year La Ninas like this year, this La Niña looks "east-based", which tends to actually favor a negative NAO.

E.g.: Impacts of the two types of La Niña on the NAO during Winter

View attachment 150740

View attachment 150738

View attachment 150739


Also, this year is squarely in the westerly phase of the QBO, which normally shifts the Aleutian ridge poleward towards Alaska, increasing the risk for -EPO/-WPOs (HM/Anthony Masiello has talked about this for over a decade now).

The other thing that seems to be in our corner this year is the fact that we're in an increasingly westerly QBO: https://psl.noaa.gov/data/correlation/qbo.data

A west QBO coupled with solar maximum, and a La Niña is arguably the most favorable QBO, Solar, & ENSO combination historically for a sudden stratospheric warming event, which would support the potential for -NAO this winter.

E.g. Labitzke et al (2006) found that of the 11 west qbo sudden stratospheric warming events that occurred prior to the mid-2000s or so, 10 of those 11 happened during solar max (like this year!) https://journals.ametsoc.org/view/journals/atsc/64/4/jas3883.1.xml

Here's how cool ENSO winters w/ varying QBO behavior compare over the Northern Hemisphere since 1953:

500mb pattern for cool neutral - Nina winters w/ west -> east transitioning QBOs before winter. Pretty canonical Nina pattern here w/ slightly suppressed Aleutian Ridge & SE US ridge w/ +NAO/+TNH.

View attachment 150741


500mb pattern for cool neutral - Nina winters w/ east -> west transitioning QBOs before winter (like this year). Notice the Aleutian Ridge is shifted poleward & there's a -NAO, with a much more suppressed SE US ridge.

View attachment 150743


500mb difference composite between the most recent 10 east -> west & west -> east QBO cool ENSO winters basically yields the NAO pattern. This means that -NAO is much more favored when we're transitioning from east to west QBO w/ cool ENSO (like this year). This is aside from the fact that as mentioned previously solar max, & of course warm Atlantic are all also trying to help favorably influence our chances for a -NAO this coming winter.

View attachment 150742


All told, although it's pretty early in the grand scheme of things, I'm much more cautiously optimistic than folks for what this winter may hold over the East & Southeast US than say Joe Bastardi. Compared to last winter, I don't see this playing as much into the canonical ENSO script as much & I'm much less confident in a "torch" happening, at least through December & January (February might be a different story).
Click to expand...
The fact that this is going to be first year La Niña does at least give some hope in December and at least the first half of January based on climo. We should have some extended stretches of strong blocking and a -NAO during that time which would at least give us east of the Apps a chance. The big question is as has seemed to be the case the last few years is… are we ever going to time strong blocking with a favorable MJO. If we do then maybe we can put together a period like we saw in January 2022
 
Webberweather53 said:
I'm obviously (kind of) pulling everyone's legs here. In all seriousness, here a few of my way too early thoughts on this winter:

We're probably headed for a weak, if not moderate La Niña this winter (in fact one is already developing). However, I have a suspicion that this year may not follow the canonical mold of suppressed Aleutian ridge/-PNA/SE US ridge for large stretches of the winter, especially in Dec-Jan.

For one thing, as is often the case w/ weaker, first year La Ninas like this year, this La Niña looks "east-based", which tends to actually favor a negative NAO.

E.g.: Impacts of the two types of La Niña on the NAO during Winter

View attachment 150740

View attachment 150738

View attachment 150739


Also, this year is squarely in the westerly phase of the QBO, which normally shifts the Aleutian ridge poleward towards Alaska, increasing the risk for -EPO/-WPOs (HM/Anthony Masiello has talked about this for over a decade now).

The other thing that seems to be in our corner this year is the fact that we're in an increasingly westerly QBO: https://psl.noaa.gov/data/correlation/qbo.data

A west QBO coupled with solar maximum, and a La Niña is arguably the most favorable QBO, Solar, & ENSO combination historically for a sudden stratospheric warming event, which would support the potential for -NAO this winter.

E.g. Labitzke et al (2006) found that of the 11 west qbo sudden stratospheric warming events that occurred prior to the mid-2000s or so, 10 of those 11 happened during solar max (like this year!) https://journals.ametsoc.org/view/journals/atsc/64/4/jas3883.1.xml

Here's how cool ENSO winters w/ varying QBO behavior compare over the Northern Hemisphere since 1953:

500mb pattern for cool neutral - Nina winters w/ west -> east transitioning QBOs before winter. Pretty canonical Nina pattern here w/ slightly suppressed Aleutian Ridge & SE US ridge w/ +NAO/+TNH.

View attachment 150741


500mb pattern for cool neutral - Nina winters w/ east -> west transitioning QBOs before winter (like this year). Notice the Aleutian Ridge is shifted poleward & there's a -NAO, with a much more suppressed SE US ridge.

View attachment 150743


500mb difference composite between the most recent 10 east -> west & west -> east QBO cool ENSO winters basically yields the NAO pattern. This means that -NAO is much more favored when we're transitioning from east to west QBO w/ cool ENSO (like this year). This is aside from the fact that as mentioned previously solar max, & of course warm Atlantic are all also trying to help favorably influence our chances for a -NAO this coming winter.

View attachment 150742


All told, although it's pretty early in the grand scheme of things, I'm much more cautiously optimistic than folks for what this winter may hold over the East & Southeast US than say Joe Bastardi. Compared to last winter, I don't see this playing as much into the canonical ENSO script as much & I'm much less confident in a "torch" happening, at least through December & January (February might be a different story).
Click to expand...

Thanks for your post. I hope you’re right!

1. Whereas I’d love to see it and wouldn’t be surprised to have a few -NAO periods and perhaps one -NAO month, I’m very skeptical of much of a chance for a DJF averaged -NAO this winter and am predicting either a +NAO again this winter or at best neutral (-0.25 to +0.25), especially with it near a solar max. Why? There have been only 6 of the last 35 winters with a sub -0.25 average NAO: 1984-5, 1986-7, 1995-6, 2009-10, 2010-1, and 2020-1. All had DJF sunspots of <35 (vs 85 long term average) and all were within ~2 years of a solar min.

NAO by month:

Monthly sunspots: https://www.sidc.be/SILSO/DATA/SN_m_tot_V2.0.txt

2. Based on my past research of QBO/ENSO combos, I found the El Niño/E combo (like last winter and hopefully again next winter) to be the one with the highest frequency of major SSWs. And we did have several last winter. Despite that, we still had a strong +NAO averaged winter. -NAO winters have been so hard to come by in recent decades outside of being near solar mins. Regardless, I feel there’s a good chance for a major SSWE between late Jan and Mar.

3. I’d love to be wrong in my -NAO thinking this winter! Regardless, I’m hopeful for 2025-6, when the latest CANSIPS has a Modoki El Niño and we should have E QBO (though -NAO avg over DJF would again be tough to get imho). Modoki Nino/E is my favorite combo these days.

4. I also think weak to moderate La Nina this winter (weak ONI based and moderate RONI based).
 
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The default is towards warm in this climate change global warming situations. Not many thought last February would be as warm as it was especially in niño. With +qbo and solar max or higher sunspots, that in itself should allow it to be much colder than last winter imo.
 
ForsythSnow said:
What's worse than 3 snowless winters?

4 snowless winters. I don't know how it can actually be worse than warm and snowless. I'd take warm average and one big snow that melts in 2 days over 0.
Click to expand...

I was talking about last winter in which I didn't get a single flake or ice pellet or even a glaze.


Sent from my iPhone using Tapatalk
 
BHS1975 said:
I mean it can't be any worse.


Sent from my iPhone using Tapatalk
Click to expand...

This. There's no way it can get worse here. Lol

Feel free to quote me in March but like everything that could go wrong last winter went wrong and I will stand by that til I'm proven otherwise
 
Webberweather53 said:
I'm obviously (kind of) pulling everyone's legs here. In all seriousness, here a few of my way too early thoughts on this winter:

We're probably headed for a weak, if not moderate La Niña this winter (in fact one is already developing). However, I have a suspicion that this year may not follow the canonical mold of suppressed Aleutian ridge/-PNA/SE US ridge for large stretches of the winter, especially in Dec-Jan.

For one thing, as is often the case w/ weaker, first year La Ninas like this year, this La Niña looks "east-based", which tends to actually favor a negative NAO.

E.g.: Impacts of the two types of La Niña on the NAO during Winter

View attachment 150740

View attachment 150738

View attachment 150739


Also, this year is squarely in the westerly phase of the QBO, which normally shifts the Aleutian ridge poleward towards Alaska, increasing the risk for -EPO/-WPOs (HM/Anthony Masiello has talked about this for over a decade now).

The other thing that seems to be in our corner this year is the fact that we're in an increasingly westerly QBO: https://psl.noaa.gov/data/correlation/qbo.data

A west QBO coupled with solar maximum, and a La Niña is arguably the most favorable QBO, Solar, & ENSO combination historically for a sudden stratospheric warming event, which would support the potential for -NAO this winter.

E.g. Labitzke et al (2006) found that of the 11 west qbo sudden stratospheric warming events that occurred prior to the mid-2000s or so, 10 of those 11 happened during solar max (like this year!) https://journals.ametsoc.org/view/journals/atsc/64/4/jas3883.1.xml

Here's how cool ENSO winters w/ varying QBO behavior compare over the Northern Hemisphere since 1953:

500mb pattern for cool neutral - Nina winters w/ west -> east transitioning QBOs before winter. Pretty canonical Nina pattern here w/ slightly suppressed Aleutian Ridge & SE US ridge w/ +NAO/+TNH.

View attachment 150741


500mb pattern for cool neutral - Nina winters w/ east -> west transitioning QBOs before winter (like this year). Notice the Aleutian Ridge is shifted poleward & there's a -NAO, with a much more suppressed SE US ridge.

View attachment 150743


500mb difference composite between the most recent 10 east -> west & west -> east QBO cool ENSO winters basically yields the NAO pattern. This means that -NAO is much more favored when we're transitioning from east to west QBO w/ cool ENSO (like this year). This is aside from the fact that as mentioned previously solar max, & of course warm Atlantic are all also trying to help favorably influence our chances for a -NAO this coming winter.

View attachment 150742


All told, although it's pretty early in the grand scheme of things, I'm much more cautiously optimistic than folks for what this winter may hold over the East & Southeast US than say Joe Bastardi. Compared to last winter, I don't see this playing as much into the canonical ENSO script as much & I'm much less confident in a "torch" happening, at least through December & January (February might be a different story).
Click to expand...
You are the greatest forecaster ever and SouthernWX is so lucky to have you! The best forecaster
 
Honestly i could care less about what happened last winter especially while living in Phenix city Alabama now since i just moved north of Huntsville in Hazel Green Alabama. I’m putting all my chips on the board to see a snowstorm even if it just flurries i’d say that would be a win in my book after suffering bad the last 3 winters without seeing a flake.
 
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