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Everything posted by Stormchaserchuck1
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Day 10 Euro: NAO is going positive, PNA is going negative.. https://ibb.co/N3XZNRB
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Especially because the OP GFS is so warm
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There are many factors at play, ENSO is one of them. So far in this El Nino event, we have seen a N. Pacific trough more often, but it's still correlating on the level of like a Weak El Nino. Usually Dec and Jan is where that correlation picks up, but we'll see.. I know '97 and '82 had massive N. Pacific low's right now.
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Yeah, they're both doing well with their analysis. Bluewave's showing of how we have followed similar progressions as the last few year's makes me think this Feb won't be a huge +PNA-Nino like everyone thinks (Hopefully we have -NAO).
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It seems like we have a stronger relative SE ridge. Last Winter the N. Pacific ridge was extending into AK and the GOA a lot, and I was thinking "well maybe that's just an extended -PNA" and that a AK/GOA trough wouldn't really hurt us, or it could favor a trough. Now we have a slight +epo and it seems to be killing our pattern completely. I just think it's a case where 65/35 of the globe is warm, and we have a stronger relative SE ridge. The Pacific pattern on models isn't really that strong, especially compared to -nao.
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El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
Looks like some unfavorable phases coming up https://www.cpc.ncep.noaa.gov/products/precip/CWlink/MJO/CLIVAR/clivar_wh.shtml -
El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
-NAO's have certainly been harder to stick lately, for the last few decades. -
The neg NAO starts with -PNA. https://ibb.co/HP6Kzqx PNA never really goes positive through current 15-day models, so let's see if it trends (El Nino)..
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I think we may have a -PNA this February. The 6-year running mean is +150dm over the PNA region.
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Hopefully we have a +PNA by then. That is some interesting energy moving across the US around Dec 4-6 though.
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El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
In a lot of cases, it has been just as strong as the warmth is in the eastern subsurface. Some years like 1972 had mostly negative subsurface waters, while the surface was Strong Nino. 0-300m, yes. -
El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
Subsurface is really heating up. +5c over a large area according to the TAO/Triton maps, which is by far the greatest of the event so far. https://ibb.co/jyXz36R And again, we aren't seeing cold water in the western subsurface, like other Strong events at this time of year. That could negate the tendency for us to automatically flip ENSO states next year. -
I've been saying watch near Dec 5th for our first possible snow event. This isn't a strong signal, but it's not that far off a really good setup.. https://ibb.co/vdN2TYW The reason is a stronger piece of energy is dropping into the SW around Dec 1-3.. when that moves east if we have this 3-wave setup with nothing else, like a Aleutian High, then we might have a snow event to track. El Nino should keep us away from -PNA as this trends closer, but let's see..
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El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
I don't think the -PDO is really a good reason either: Air dominates water. -
El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
Maybe the El Nino is why models are fluctuating so much? I noticed a much greater than average change in the MR/LR models for the first time when the El Nino started up in the Spring, through the Summer, and now with a major model shift in the last few days (now -NAO and +EPO), this is when El Nino is spiking.. it seems like it would be an independent thing, the model flux, but maybe it's related to the El Nino? -
Since 2019, almost every single -NAO has correlated with a +EPO/-PNA, and +NAO's correlating with -EPO/+PNA.. that really holds true in these recent shifts. I think something is happening globally that makes it all run together. I would of course, rather see the +PNA/-EPO/+NAO combo and we can get a Winter like 14-15.
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I think our first flakes are going to wait until that Pacific pattern breaks down. +EPO is the worst pattern for snow, -PNA the second, and models went big in that direction today. But like I said last night, they are fluctuating big time day-to-day. They had a +NAO in the MR/LR a few days ago which is now a big -NAO. Back to the basics: We have a > +2.0 Nino 3.4 strengthening El Nino happening, so we should favor more +PNA or GOA lows, let's see if models drop the big -PNA/+EPO that they, today, have, if nothing else just because of ENSO.
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How about these run to run model changes? Now we have a -PNA and -NAO??
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Moderating under +AO.. will probably veer warm, but this is an interesting setup with developing 50/50 low and GOA low. We don't miss it by a lot. I expect to see a lot of this setup in the Winter (+nao/good Pacific at the same time).
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We tend to be a little drier in Nov and Dec
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Really getting cold after this Wave #3. https://mag.ncep.noaa.gov/data/gfs/18/namer/10m_wnd_2m_temp/gfs_namer_237_10m_wnd_2m_temp.gif Colder than 12z run
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El Nino 2023-2024
Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
I think I posted before that Nov has historically low correlation between ENSO and the N. Pacific pattern, that it starts picking up +correlation in the month of December With the subsurface on fire, it's no surprise to see this strong N. Pacific low signal on the LR GEFS https://ibb.co/xj57pjJ as December starts correlating better in the N. Pacific -
The El Nino is really spiking up right now, both on the surface and in the subsurface, passing +2.0 in Nino 3.4. LR GEFS shows a healthy N. Pacific low: https://ibb.co/xj57pjJ But it also has some ridging in the NE from +NAO, that will need to be sorted out in future model runs (NAO region has been volatile at that range).
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Stormchaserchuck1 replied to George001's topic in Weather Forecasting and Discussion
https://www.pmel.noaa.gov/gtmba/pmel-theme/pacific-ocean-tao You can click on "Data", then "Data Display" then "Assorted Plots" -
The ridge gets stuck in the GOA, instead of the WC. Looking at the NAO, AO, and EPO I would guess we have more of a chance at snow.. Canadian low keeps us warm.
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