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December 2021


MJO812
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24 minutes ago, EasternLI said:

A very large part...

Yeah, the standing wave near Australia is classic La Niña. It acts to pump the Aleutians Ridge and cause a deep -PNA trough over the Western US. While the individual MJO composites don’t always match, this month is very close to the La Niña December forcing composite.


8C9AFDFE-E967-4101-BEC8-31B2AD87A646.gif.8a0f98f33d94e7139c90646b373912d6.gif

7CD73A8B-6B60-47CB-A93C-CCBEB8AC56B8.gif.efe14191dce4c7b6e1ce16933de7a713.gif

E3D4B7D5-9E92-4C79-BBD5-D14FBB03A92F.png.64606334a5652340ad124f659ff708bc.png

4E3F72B5-0BD8-4190-86BB-44252DE97C42.png.b7f4a7b106ebe178f1db78aec4b621a5.png

 

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14 minutes ago, NEG NAO said:

overall but other things interfere that greatly affect the finer details and outcomes .........

it's going to snow in january guys don't worry so much. winter usually kicks in from january to late march! i don't think we have a january thaw this year! 

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1 hour ago, donsutherland1 said:

Here’s what I could find:

image.jpeg.a6372dbb1c30bf3248e2dd60201f2065.jpeg

image.jpeg.006d608d70cba871c2c5032c9ea679e5.jpeg

So, if I review this correctly,  the southern stream is INACTIVE, lighter than normal flow along roughly 25-35N in the Pac through to the ATLC,  but above normal speed Aleutians to the Canadian USA border.  

IF that's a correct read,  I want to be looking for a strengthening of the jet near 30N, which if this were to eventually occur with a WAVE breaking ridge off the west coast, our chances for something in the southern stream would increase with eventual -NAO cold air damming (CAD) benefits.  For now as I see it, we just cant tone down the strength of the short wave jet stream energy packets (500MB vorticity centers) in the northern USA. 

Fingers crossed that there is so much we don't know, that this pattern will eventually evolve-respond to permit at least 10" of seasonal snow in NYC and 25" out here in nw NJ.  Those are my goals now... which I hope we can achieve by March 15 2022.

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5 minutes ago, wdrag said:

So, if I review this correctly,  the southern stream is INACTIVE, lighter than normal flow along roughly 25-35N in the Pac through to the ATLC,  but above normal speed Aleutians to the Canadian USA border.  

IF that's a correct read,  I want to be looking for a strengthening of the jet near 30N, which if this were to eventually occur with a WAVE breaking ridge off the west coast, our chances for something in the southern stream would increase with eventual -NAO cold air damming (CAD) benefits.  For now as I see it, we just cant tone down the strength of the short wave jet stream energy packets (500MB vorticity centers) in the northern USA. 

Fingers crossed that there is so much we don't know, that this pattern will eventually evolve-respond to permit at least 10" of seasonal snow in NYC and 25" out here in nw NJ.  Those are my goals now... which I hope we can achieve by March 15 2022.

Thanks Walt! Although the low floor is depressing to see.

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18 minutes ago, RippleEffect said:

it's going to snow in january guys don't worry so much. winter usually kicks in from january to late march! i don't think we have a january thaw this year! 

thats a relief I was waiting for someone like you to clear things up.......

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EPS with a nod now to the GEFS at 12z with the mjo IMO. That's a new development today. Stall in phase 7 is a real possibility. So you can see, the nice pattern previously displayed, now delayed as a result. The trough was further east by this time on the 00z run. That's why it's important to keep an eye on this stuff. 

1276521279_index(9).thumb.png.a92405c60e12c9d73f87ef134779983d.png

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9 minutes ago, EasternLI said:

EPS with a nod now to the GEFS at 12z with the mjo IMO. That's a new development today. Stall in phase 7 is a real possibility. So you can see, the nice pattern previously displayed, now delayed as a result. The trough was further east by this time on the 00z run. That's why it's important to keep an eye on this stuff. 

1276521279_index(9).thumb.png.a92405c60e12c9d73f87ef134779983d.png

Phase 7 in January is a good pattern for the east coast 

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2 minutes ago, Allsnow said:

Phase 7 in January is a good pattern for the east coast 

Well, you can get variations depending on other factors too. I feel like ensembles are showing a version of this bumped west a tad. Not a perfect match by any means but some similarities, moreso on the GEFS run. 

nina_7_gen_ok.thumb.png.4cf706764f3eec1c69eba1789fff295a.png

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1 hour ago, bluewave said:

Yeah, the standing wave near Australia is classic La Niña. It acts to pump the Aleutians Ridge and cause a deep -PNA trough over the Western US. While the individual MJO composites don’t always match, this month is very close to the La Niña December forcing composite.


8C9AFDFE-E967-4101-BEC8-31B2AD87A646.gif.8a0f98f33d94e7139c90646b373912d6.gif

7CD73A8B-6B60-47CB-A93C-CCBEB8AC56B8.gif.efe14191dce4c7b6e1ce16933de7a713.gif

E3D4B7D5-9E92-4C79-BBD5-D14FBB03A92F.png.64606334a5652340ad124f659ff708bc.png

4E3F72B5-0BD8-4190-86BB-44252DE97C42.png.b7f4a7b106ebe178f1db78aec4b621a5.png

 

The signals for the deep -PNA/RNA, full-latitude trough in the west this month were clear as day at the end of November, even just before Thanksgiving week, the problem is some decided to ignore those warnings. And there are more warnings for January….the models are steadfast on the tropical convective forcing moving to the IO by mid-January…..I’m sure these red flags will also be ignored by some as well….

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5 minutes ago, snowman19 said:

The signals for the deep -PNA/RNA, full-latitude trough in the west this month were clear as day at the end of November, even just before Thanksgiving week, the problem is some decided to ignore those warnings. And there are more warnings for January….the models are steadfast on the tropical convective forcing moving to the IO by mid-January…..I’m sure these red flags will also be ignored by some as well….

 

On 11/25/2021 at 10:21 AM, snowman19 said:

The La Niña driven easterly trades are absolutely roaring up to the dateline. Any MJO wave that tries to propagate into phases 7, 8 is going to get ripped apart and sheared to shreds 

 

 

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49 minutes ago, EasternLI said:

So you can see, the nice pattern previously displayed, now delayed as a result

Not a surprise given how the models have been unsuccessfully trying to weaken the La Niña standing wave near Australia. 
 

New run

CFA445BC-8E9D-42FE-A1B5-5D2BC1E4DC3E.thumb.png.e0ed044ab6923424bdae7705adeb8ab6.png

 

Old run


37060550-05C2-4A7C-97AF-AB7751CACD29.thumb.png.1ae240842245328d11f102080e1955c3.png

 

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46 minutes ago, EasternLI said:

EPS with a nod now to the GEFS at 12z with the mjo IMO. That's a new development today. Stall in phase 7 is a real possibility. So you can see, the nice pattern previously displayed, now delayed as a result. The trough was further east by this time on the 00z run. That's why it's important to keep an eye on this stuff. 

1276521279_index(9).thumb.png.a92405c60e12c9d73f87ef134779983d.png

This isn’t a bad look though. At least the SE ridge is neutered.

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On 11/26/2021 at 5:53 AM, snowman19 said:

@bluewaveStill a firehose PAC jet in the long range as far as the eye can see. It shows no signs of letting up. It also looks like the +EPO has established a positive feedback loop due to the super cold GOA/severely -PDO and the extremely deep snowpack over all of Alaska. It’s just continuing to manufacture it’s own extreme cold there due to the very heavy snowpack and lack of sun, Alaska is setting all kinds of cold records

Didn’t age well 

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2 minutes ago, EasternLI said:

The question is, does it progress after a stall? Or what happens? I still see pretty strong subsidence in the Indian ocean edging into the Maritime Continent on the end of both ensembles. So I don't think we revert to that area. At least not initially because of that. 

It will get into 8 but probably after the 1st week of January 

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Just now, Allsnow said:

It will get into 8 but probably after the 1st week of January 

That's kind of the way I'm leaning right now. But phase 7 is interesting anyway, that pattern can have ramifications up north. This is all way better than being stuck in the IO or Maritime Continent either way. I'd just pack it in if that was what we were facing. 

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1 minute ago, EasternLI said:

That's kind of the way I'm leaning right now. But phase 7 is interesting anyway, that pattern can have ramifications up north. This is all way better than being stuck in the IO or Maritime Continent either way. I'd just pack it in if that was what we were facing. 

Yeah, if we get to mid January and still stuck in the same h5 set up we are probably in trouble. At that point We would probably need a ssw to save us lol. As of now, I don’t think it’s time to Panic 

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