However, that's an absolutely tiny reversal and not really in the same ballpark as other "major" SSWs.
Furthermore, choosing hourly (rather than 6-hourly) input data makes the daily-mean reversal even smaller: only –0.02 m/s!
As such, this SSW is unlikely to be present in all reanalyses.
Furthermore, choosing hourly (rather than 6-hourly) input data makes the daily-mean reversal even smaller: only –0.02 m/s!
As such, this SSW is unlikely to be present in all reanalyses.
December 8, 2025 at 8:13 PM
However, that's an absolutely tiny reversal and not really in the same ballpark as other "major" SSWs.
Furthermore, choosing hourly (rather than 6-hourly) input data makes the daily-mean reversal even smaller: only –0.02 m/s!
As such, this SSW is unlikely to be present in all reanalyses.
Furthermore, choosing hourly (rather than 6-hourly) input data makes the daily-mean reversal even smaller: only –0.02 m/s!
As such, this SSW is unlikely to be present in all reanalyses.
File this under "Not the canonical response to major SSWs across much of the Northern Hemisphere."
Much of Eurasia is forecast to be above average.
In North America, the pattern looks more like strat reflection with MJO Phase 6-8 teleconnections mixed in.
From the latest ECMWF weeklies. #S2S
Much of Eurasia is forecast to be above average.
In North America, the pattern looks more like strat reflection with MJO Phase 6-8 teleconnections mixed in.
From the latest ECMWF weeklies. #S2S
November 24, 2025 at 3:20 PM
File this under "Not the canonical response to major SSWs across much of the Northern Hemisphere."
Much of Eurasia is forecast to be above average.
In North America, the pattern looks more like strat reflection with MJO Phase 6-8 teleconnections mixed in.
From the latest ECMWF weeklies. #S2S
Much of Eurasia is forecast to be above average.
In North America, the pattern looks more like strat reflection with MJO Phase 6-8 teleconnections mixed in.
From the latest ECMWF weeklies. #S2S
On top of being allied with Israel, OF adds another ✅ to the reasons why I don’t want to support their platform. They do not support SSWs, especially those incarcerated due to street-based SW or trafficking survivors. Only supports the top 1% of carbon copy models being exploited in that OF house. 🙄
November 20, 2025 at 3:28 PM
On top of being allied with Israel, OF adds another ✅ to the reasons why I don’t want to support their platform. They do not support SSWs, especially those incarcerated due to street-based SW or trafficking survivors. Only supports the top 1% of carbon copy models being exploited in that OF house. 🙄
Now, a majority of the 101 ensemble members in the ECMWF subseasonal forecast are indicating a major sudden stratospheric warming (SSW) event next week.
November SSWs are extremely rare: over the last 67 years, there is only one known event (Nov 1968).
November SSWs are extremely rare: over the last 67 years, there is only one known event (Nov 1968).
November 19, 2025 at 8:26 AM
Now, a majority of the 101 ensemble members in the ECMWF subseasonal forecast are indicating a major sudden stratospheric warming (SSW) event next week.
November SSWs are extremely rare: over the last 67 years, there is only one known event (Nov 1968).
November SSWs are extremely rare: over the last 67 years, there is only one known event (Nov 1968).
November 17, 2025 at 9:52 PM
Further, mid latitude temperature and moisture patterns and their gradients seem to have breached a threshold in recent years with polar vortex disruptions now becoming the norm.
5-6- SSWs are normal per decade - the last 2 years we had 4-5 and this winter does not seem to be a exception.
5-6- SSWs are normal per decade - the last 2 years we had 4-5 and this winter does not seem to be a exception.
November 7, 2025 at 8:24 PM
Further, mid latitude temperature and moisture patterns and their gradients seem to have breached a threshold in recent years with polar vortex disruptions now becoming the norm.
5-6- SSWs are normal per decade - the last 2 years we had 4-5 and this winter does not seem to be a exception.
5-6- SSWs are normal per decade - the last 2 years we had 4-5 and this winter does not seem to be a exception.
Interesting to see so many ECMWF ensemble members producing a major sudden stratospheric warming event, where the 60N zonal wind at 10 hPa reverses, in late Nov or 1st half Dec.
In records back to 1959 I'm aware of only 3 major SSWs within 1st half Dec & none in November.
In records back to 1959 I'm aware of only 3 major SSWs within 1st half Dec & none in November.
November 4, 2025 at 11:31 AM
Interesting to see so many ECMWF ensemble members producing a major sudden stratospheric warming event, where the 60N zonal wind at 10 hPa reverses, in late Nov or 1st half Dec.
In records back to 1959 I'm aware of only 3 major SSWs within 1st half Dec & none in November.
In records back to 1959 I'm aware of only 3 major SSWs within 1st half Dec & none in November.
💧Les ONG Générations Futures et Data For Good ont mis en ligne un site proposant une carte interactive des principaux polluants chimiques présents dans l'eau du robinet, espérant permettre ainsi "un accès plus facile du public à ces informations".
➡️ u.afp.com/Ssws
➡️ u.afp.com/Ssws
October 16, 2025 at 12:31 PM
💧Les ONG Générations Futures et Data For Good ont mis en ligne un site proposant une carte interactive des principaux polluants chimiques présents dans l'eau du robinet, espérant permettre ainsi "un accès plus facile du public à ces informations".
➡️ u.afp.com/Ssws
➡️ u.afp.com/Ssws
Strong vortex: 2020, 2022, 2025
SSWs: 2021, 2023, 2024 (x2)
Feels like we swing between extremes these days. And no, that’s not meant to be a political comment 🫣
SSWs: 2021, 2023, 2024 (x2)
Feels like we swing between extremes these days. And no, that’s not meant to be a political comment 🫣
January 20, 2025 at 6:40 PM
Strong vortex: 2020, 2022, 2025
SSWs: 2021, 2023, 2024 (x2)
Feels like we swing between extremes these days. And no, that’s not meant to be a political comment 🫣
SSWs: 2021, 2023, 2024 (x2)
Feels like we swing between extremes these days. And no, that’s not meant to be a political comment 🫣
Please join us in welcoming Angela Wiggins Harris, LCSW-BACS, C-SSWS as the new President of NASW-Louisiana! We would also like to welcome our new Student Board Representatives. Meet the full NASW-LA Board: naswla.socialworkers.org/About/Board-...
July 8, 2025 at 2:03 PM
Please join us in welcoming Angela Wiggins Harris, LCSW-BACS, C-SSWS as the new President of NASW-Louisiana! We would also like to welcome our new Student Board Representatives. Meet the full NASW-LA Board: naswla.socialworkers.org/About/Board-...
I think the best example of the problem with the SSWS is Sandy. A cat 1 equivalent pst tropical cyclone at landfall but a pressure reading akin to a cat 4 with a 5-10 foot storm surge + an additional few feet from a spring high tide. According to the SSWS Sandy should have not been an historic storm
September 13, 2025 at 6:48 PM
I think the best example of the problem with the SSWS is Sandy. A cat 1 equivalent pst tropical cyclone at landfall but a pressure reading akin to a cat 4 with a 5-10 foot storm surge + an additional few feet from a spring high tide. According to the SSWS Sandy should have not been an historic storm
SSWs are extremely rare in the Southern Hemisphere, with only two major events documented in the past 60 years — one in 2002 and the other in 2019 — and both resulted in some of the most devastating bushfires in Australia's history.
Sudden 30C temperature rise over Antarctica upends Australia's spring outlook www.abc.net.au/news/2025-09...
Rare phenomenon could disrupt Australia’s weather for months
Temperatures above Antarctica have risen by 30C, in a rare event that could potentially flip Australia's spring weather for months.
www.abc.net.au
November 16, 2025 at 7:29 AM
SSWs are extremely rare in the Southern Hemisphere, with only two major events documented in the past 60 years — one in 2002 and the other in 2019 — and both resulted in some of the most devastating bushfires in Australia's history.
(1/2) Tropical lower stratosphere is setting some new daily record low temps related to the ongoing major #SSW in the Arctic polar stratosphere. This is because SSWs initially accelerate the stratospheric residual circulation, driving upward motion and cooling in the tropics.
March 7, 2024 at 7:03 PM
(1/2) Tropical lower stratosphere is setting some new daily record low temps related to the ongoing major #SSW in the Arctic polar stratosphere. This is because SSWs initially accelerate the stratospheric residual circulation, driving upward motion and cooling in the tropics.
Now then .. SSWs .. rare in the north, rarer in the south .. I PREDICTED .. there would be double events in a season, eventually triple in the north while the rare occurrences in the south would also increase
July 16, 2025 at 7:33 PM
Now then .. SSWs .. rare in the north, rarer in the south .. I PREDICTED .. there would be double events in a season, eventually triple in the north while the rare occurrences in the south would also increase
Thus, studies on the impact of SSWs on the general circulation should take the Rossby scale height (of ~10 km) into account because of the vertical reach of stratospheric PV anomalies to the tropospheric jet stream. The DSW could be a useful metric for impact studies.
August 6, 2025 at 12:50 PM
Thus, studies on the impact of SSWs on the general circulation should take the Rossby scale height (of ~10 km) into account because of the vertical reach of stratospheric PV anomalies to the tropospheric jet stream. The DSW could be a useful metric for impact studies.
ユニット、ラビラビ、パラレルワールド、TRIP、スイートハウス、熱視線、F1、F2、SSWS、ボギタ、フーディ、DF×ラビ、SS紅白、七夕、スフィアコーデ、宇宙服みたいなやつ、らびゅピ
⬆️このくらいはあるはず
⬆️このくらいはあるはず
September 9, 2025 at 11:26 AM
ユニット、ラビラビ、パラレルワールド、TRIP、スイートハウス、熱視線、F1、F2、SSWS、ボギタ、フーディ、DF×ラビ、SS紅白、七夕、スフィアコーデ、宇宙服みたいなやつ、らびゅピ
⬆️このくらいはあるはず
⬆️このくらいはあるはず
ウロボロス5位まじで強くないと思ってる、SSWS飴コンの方が誇れる
April 11, 2025 at 11:40 PM
ウロボロス5位まじで強くないと思ってる、SSWS飴コンの方が誇れる
You can also see the extremely high polar cap ozone values which occurred this time last year following two major SSWs – doi.org/10.1029/2024...
Record High March 2024 Arctic Total Column Ozone
Arctic total column ozone in March 2024 set a record high for the 1979-present period
Polar lower stratosphere temperatures also set a record high in March 2024 in the MERRA-2 reanalysis data
A ...
doi.org
March 16, 2025 at 5:04 PM
You can also see the extremely high polar cap ozone values which occurred this time last year following two major SSWs – doi.org/10.1029/2024...
#readandplay (449)
#MusicChallenge
#MusicSky
Second pick
It's not neat
It′s not fair
And the worst part is you understand
Its not neat
Its not fair
Now
Nothing's like it was before
www.youtube.com/watch?v=sSws...
#MusicChallenge
#MusicSky
Second pick
It's not neat
It′s not fair
And the worst part is you understand
Its not neat
Its not fair
Now
Nothing's like it was before
www.youtube.com/watch?v=sSws...
August 24, 2025 at 3:27 PM
#readandplay (449)
#MusicChallenge
#MusicSky
Second pick
It's not neat
It′s not fair
And the worst part is you understand
Its not neat
Its not fair
Now
Nothing's like it was before
www.youtube.com/watch?v=sSws...
#MusicChallenge
#MusicSky
Second pick
It's not neat
It′s not fair
And the worst part is you understand
Its not neat
Its not fair
Now
Nothing's like it was before
www.youtube.com/watch?v=sSws...
#MusicChallenge
#KillerTunes
10/4 The Wicked Witch Of The West - The Wizard Of Oz
Ice Cube, "Wicked"
www.youtube.com/watch?v=SsWs...
#KillerTunes
10/4 The Wicked Witch Of The West - The Wizard Of Oz
Ice Cube, "Wicked"
www.youtube.com/watch?v=SsWs...
October 4, 2025 at 10:30 PM
#MusicChallenge
#KillerTunes
10/4 The Wicked Witch Of The West - The Wizard Of Oz
Ice Cube, "Wicked"
www.youtube.com/watch?v=SsWs...
#KillerTunes
10/4 The Wicked Witch Of The West - The Wizard Of Oz
Ice Cube, "Wicked"
www.youtube.com/watch?v=SsWs...
A beat up copy of that issue was my oldest SSWS for many years.
October 13, 2025 at 7:19 PM
A beat up copy of that issue was my oldest SSWS for many years.
During the satellite era, no November SSW events are known to have occurred; the last robustly documented case was in 1968 (csl.noaa.gov/groups/csl8/...).
In a large sample of seasonal reforecasts (Ineson et al), November SSWs seem to be even rarer.
rmets.onlinelibrary.wiley.com/doi/full/10....
In a large sample of seasonal reforecasts (Ineson et al), November SSWs seem to be even rarer.
rmets.onlinelibrary.wiley.com/doi/full/10....
November 10, 2025 at 11:52 AM
During the satellite era, no November SSW events are known to have occurred; the last robustly documented case was in 1968 (csl.noaa.gov/groups/csl8/...).
In a large sample of seasonal reforecasts (Ineson et al), November SSWs seem to be even rarer.
rmets.onlinelibrary.wiley.com/doi/full/10....
In a large sample of seasonal reforecasts (Ineson et al), November SSWs seem to be even rarer.
rmets.onlinelibrary.wiley.com/doi/full/10....
Yes the Wikipedia pages for polar vortex and SSWs need quite a lot of work unfortunately
December 8, 2025 at 7:26 PM
Yes the Wikipedia pages for polar vortex and SSWs need quite a lot of work unfortunately