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2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!

 
Luisport (OP)

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01/06/2013 02:35 PM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

@_chrisfawkes - The model volatility is a major headache. 12Z GFS ENS clearly cold but the lack of model consistency is clearly evident.
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

Here's the 2m GFS ENS for N Eng - [link to www.meteociel.com] … - Clearly far from a mild outlook...
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

From 168hrs the EC ENS mean is colder than the EC Op run & still has a block to the NW more dominant than the Op. 12Z EC run looks mild run.
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
snowking
Posted 3 minutes ago

Have I just been missing it all this time, or have a heck of a lot more models suddenly been given 10mb temperature outputs on Meteociel?!

[link to www.meteociel...rte=1&archive=0]

[link to www.meteociel...&nh=1&archive=0]

[link to www.meteociel...rte=1&archive=0]

[link to www.meteociel...de=10&archive=0]

Thats now JMA, NOGAPS, CMA (China) and NCMRWF (India)

Gives us a lot more data going forward!

SK [link to forum.netweather.tv]
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Joe Bastardi‏@BigJoeBastardi

No End to Coldest China Winter in 28 Years, Forecaster Says [link to bloom.bg] via @BloombergNews EUROPE,US NEXT IN 10 DAYS
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Joe Bastardi‏@BigJoeBastardi

Severe Cold is taking over much of the Nhem land masses in 8-16 day period [link to twitter.com]
DUCM900

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01/07/2013 07:40 AM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
>>> Thread: Weather Reporting: Any Swedish / Finnish Here?



[
To live is to believe in the power of dreams.
To dream is to believe in the power of love.
To love is to believe in yourself.

Luca 21:28 "Ma quando queste cose cominceranno ad accadere, guardate in alto e alzate i vostri sguardi, perché la vostra liberazione è vicina".
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Joe Bastardi‏@BigJoeBastardi

US COLD SHOT, LIKE RUSSIA IN 2010 HEADED RIGHT FOR THE HEART OF THE SUMMER HEAT. What excuse will we hear then [link to twitter.com]
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

A cold GFS ENS mean at 144hrs - [link to www.wetterzentrale.de] …
Anonymous Coward
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01/07/2013 09:41 AM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Joe Bastardi‏@BigJoeBastardi

US COLD SHOT, LIKE RUSSIA IN 2010 HEADED RIGHT FOR THE HEART OF THE SUMMER HEAT. What excuse will we hear then [link to twitter.com]
 Quoting: Luisport


bump
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Monday, January 7, 2013Stratospheric Analysis and Forecast: January 7, 2013
By Andrew at 6:26 AM
This is the Stratospheric Analysis and Forecast for January 7, 2013. This post will review observed conditions in the stratosphere first, then run over the forecasted conditions.

We start with the 10 millibar chart, showing observed temperatures from 2012 and 2013. If we look to the latest observed temperatures, we see a very sharp spike of temperatures in this layer of the stratosphere, indicating the sudden stratospheric warming event (SSW) has begun, thanks to an incredible swath of very above normal temperatures, as shown in the below animation, also from the 10mb layer:

Notice how the warming event formed off of the Himalaya Mountains and has strengthened ever since. This is a classic example of how warm air can be pushed up mountains and create convection in the troposphere. In the stratosphere, the same event can happen, but with warming occurring in the stratosphere rather than convection. Watch the angle the swath of warming moves in the last several frames. You can see its upper-right hand portion begin to push northeast, towards the Bering Sea. This shows the willingness for the warming to propagate to the Arctic, and thus create a much more significant SSW. If this happens, the cold outbreak expected at the end of the month could be much worse than originally thought, but let's keep analyzing the ongoing conditions before we make any big assumptions like that.

The 50 millibar layer of the stratosphere, identified as the middle of the stratosphere, is also showing some modest warming in the latest observational charts, nowhere as significant as the 10 millibar layer. This comes as a previous sudden stratospheric warming event now tones down, and warmth in the Arctic at this particular level now exits the region as the SSW wraps up. This is all observed in the below animation from the 50 millibar image:

The animation shows the most recent SSW originating from Canada and penetrating the Arctic roughly around December 26th, the day after Christmas. The original SSW then created a finger of warm anomalies in far east Asia, which is beginning to tread east as the big sudden stratospheric warming event dies down. This will most likely be the base of the next sudden stratospheric warming, if there is one. It may not stay in far east Asia, but I have a good feeling this finger of warmth will be the instigator for the next SSW, should there be one.

Let's take a look now at past and present images of the 30 millibar layer:


30mb Temperatures and Heights on December 29, 2012

30mb Temperatures and Heights on January 4, 2013.
Comparing the top image, from December 29th, and the bottom image (from January 4) shows us that significant warming has indeed taken place across much of that layer of the stratosphere. The colder temperature colors have also been drastically reduced in response to this significant warming which, if it holds its ground or strengthens, would inflict increasingly heavier damage on the polar vortex. It would only take one good perfectly-placed SSW to knock the 30mb polar vortex out, possibly to collapse.
The more likely route to take would probably be a piece of the polar vortex splitting into multiple daughter vortices, with one going into Canada and the other staying in Europe. The warm temperature anomalies would then push poleward and instigate high pressure formation in between the two vortices to keep the vortices apart. The split is the first crucial step to a complete collapse of a polar vortex collapse. Will there be another SSW? I'll explain the potential later on.

These are potential vorticity (PV) values for the same dates mentioned above. They are listed in their isentropic levels, which is the 550K level. This equates to roughly 60 millibars or somewhere around there, so we're looking at the middle of the stratosphere. Higher PV values indicate the presence of low pressure, in this case the presence of the polar vortex. Comparing the two images, we see that the most recent image from January 4th on the bottom shows a deformed polar vortex compared to the top image. This clearly shows the split of the polar vortex in progress, with elongated PV values on the January 4th image. The blue PV values are areas of higher pressure, and these higher PV values are expected to press poleward and induce a split of the polar vortex into two vortices, again with one stationed over Canada and the other over Eurasia.

Now that we have a good prognosis on how the stratosphere is at the moment, let's see forecasted conditions for the stratosphere.

We are now entering the period of the second sudden stratospheric warming, in what appears to be the 10 millibar swath of warm air propagating to the Arctic. The top image shows zonal winds for the Day 2 forecast timeframe, while the second image displays temperatures and heights for the same timeframe but at the 10 millibar level. The zonal winds show the presence of the polar vortex and the effects of SSW's. In an SSW, winds in the stratosphere are slowed or reversed as the warm air shoots up the stratosphere. We can see this phenomenon happening with a large negative zonal wind anomaly setting up across much of the stratosphere from 70N - 90N. This corresponds well with warm air being found in the 10 millibar level, waging war against the polar vortices in Canada and Europe.

This is what I have been calling the Second Warming. When this SSW happens, we will see the split of the polar vortex, in what has been found as a three-step disintegration of the polar vortex: Displacement, Split and Collapse. We already had the displacement with the sudden stratospheric warming in late December, and this incoming warming event will lead to the Split. Now, I will show you increasing prospects for the Third Warming, what could become the final step in this three step process: the Collapse.

We start now with a zonal forecast of temperatures for the Day 10 timeframe, roughly when we start to see the Third Warming show itself. We see the typical warm temperatures in the troposphere below 300 millibars, the cold anomalies in the 200mb to 50mb range, and a warm temperature anomaly present in the 1mb-5mb range from the Equator (EQ) to 50N. But then comes another bulge of warm air from 70N to 90N. This was not present in earlier forecast timeframes from this model, meaning the Third Warming is appearing now on the ECMWF model. The presence of warm air in the upper stratosphere only continues to pressure the polar vortex to collapse.

The zonal wind forecast for Day 10 shows deep negative wind anomalies from 70N to 90N, with an emptiness of positive zonal winds in the lower stratosphere into the troposphere. This shows the reluctance of the polar vortex to expand as it has this Third Warming's negative zonal winds pressing in on it. Also of interest is the very deep negative zonal winds from the Equator to 20N. This phenomenon also restricts the polar vortex's expansion and assists in its weakening. And then there's a finger of negative wind anomalies from 30mb to 100mb on the left side of the image. This is another wind-based phenomenon known as the negative QBO. In the negative QBO, you will see naturally-occurring weakening of the polar vortex, not due to something extraordinary like a SSW, but because that is what the negative QBO does all day, every day when it is negative.

And now we take a look at Wave 2 of the temperature and geopotential height departments:

The charts may look complicated, but in reality they are very easy to decipher. For the top image, we see Wave 2 of the temperature forecast for Day 10. When there are higher temperatures in this image, one tends to see warming occur in the areas the warmest anomalies are over. For example, the warmest temperature anomalies are over the 2mb-20mb regions, meaning that is where you would expect to find the most stratospheric warming. As for the geopotential height Wave 2 forecast on the bottom, when you find warmer colors, it signifies higher pressure which is just that: high pressure. And high pressure working against low pressure (polar vortex) can result in weakening of the polar vortex. So the fact that high pressure is appearing in the Day 10 forecast is good news as far as weakening the polar vortex goes.

All those images were from the ECMWF model, and the above image here is from the GFS model. It is also showing the Third Warming, but at a slightly later timeframe (24 hours later than the ECMWF). The strongest warming appears to be forecasted over Canada and the Northern US. A quick glance at geopotential heights for the 10mb layer (same layer as the temperature image above) shows that this warming would strike right in the heart of the polar vortex at that level, possibly leading to a collapse of that particular vortice. From then on, it's anyones guess as to what happens.

Considering the North Atlantic Oscillation should be strongly negative during the timeframe of January 13 onward, and the Arctic Oscillation eventually going to trend strongly negative as well, it is inevitable that at least some of the nation will be greeted by some harsh cold weather. When the Madden Julian Oscillation (MJO) heads to Phase 8 in late January, we will have three indices working for harsh cold for the States. I see no reason to believe winter is over. A negative AO and negative NAO come together to incite much of the nation to be colder than normal. Considering this cold air will be pure Arctic air, if the cold air does flow south, you can bet it will be a very sharp cold outbreak, not a quick cold shot and then warmth again.

Andrew [link to theweathercentre.blogspot.de]
Luisport (OP)

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01/07/2013 10:32 AM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
AccuWeather.com‏@breakingweather

"Signs point toward waves of frigid air moving across US from North Pole." Story has been blowing up on our site: [link to ow.ly]
littlemiracles

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01/07/2013 10:46 AM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Thanks for the updates Luis!hf
Luisport (OP)

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01/07/2013 10:47 AM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Thanks for the updates Luis!hf
 Quoting: littlemiracles


Thank you! I will update untill we know exactly what will happen... models still diverge
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Liam Dutton‏@liamdutton

How cold is it going to get this week and will it snow? More in my latest blog - [link to blogs.channel4.com] … #c4news #uksnow
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

@luke_boi - Not 'true' cold no, but a NW'ly can/could under the right synoptics, but both are modified by the sea temperatures.

3 minMatthew Hugo‏@MattHugo81

Got to laugh at the variability of the GFS Det model at times - [link to www.wetterzentrale.de] …
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

The SSW is now having a massive impact on temps in the stratosphere! - [link to www.cpc.ncep.noaa.gov] … - Impacts of this to be felt in a week or two...
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Ian Fergusson‏@fergieweather

Bonkers. What a forecast headache!! "@MattHugo81: Got to laugh at the variability of the GFS Det model at times - [link to www.wetterzentrale.de] …"
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
SSW just keeps on rising [link to forum.netweather.tv]
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

Re SSW - Yes this is a major event. There are signs of additional warmings with time but this is the main Sudden Strat Warming event.

28 minMatthew Hugo‏@MattHugo81

@carlharlott @fergieweather - It is but at the 850hPa level which is approx 5000ft up...

Last Edited by Luisport on 01/07/2013 12:51 PM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

@carlharlott @fergieweather - Low pressure possible moving NW to SE across the W and S of the UK Fri into Sat. Perhaps wintry precip.
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

Given recent EC ENS I have a distinct feeling the 12z ECM will be a mild outlier...Time will in about an hr.

3 minMatthew Hugo‏@MattHugo81

The ECM Det seems to essentially be running through the ensembles with each new run. It'll come full circle to a cold E'ly again! Haha.

4 minMatthew Hugo‏@MattHugo81

Other side of the coin this evening is the ECM - [link to www.wetterzentrale.de] … Back comes the Atlantic! Nightmare model divergences...
Vita

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01/07/2013 02:50 PM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Time to panic? huh

Strangely enough, but in Russia at this exactly period "baptism of Jesus" (orthodox) it's always the coldest time in the winter and it's called "Kreshenskie morozi" the period starting 13 or later, so I think the next influence of SWW will definitely bring cold to Russia and probably to Europe

Last Edited by Vita on 01/07/2013 03:04 PM
Sol Lucet Omnibus.
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Time to panic? huh
 Quoting: Vita


no... a lot of uncertinity on models...
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
AccuWeather.com‏@breakingweather

Before arctic air hits the East later this month, cold air, snow will progress through the West. [link to ow.ly]
Luisport (OP)

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Today, 21:09 # 78 (permalink)
David sf

We are in a moment of chaos modelístico usually occurs always at moments of change of default. The 120 hours are 6 clusters (standards) different in ECMWF ensemble, being the dominant 14 is supported only by disturbances (at 52, under 30%):

[link to www.ecmwf.int]

The key of the weather next week is exactly 120 hours in cyclogenesis near the UK. If this is intense cyclogenesis, the cold air mass coming from Eastern Europe will be attracted to the west and routed to the Spanish Mediterranean circulation of this depression. If the cyclogenesis is weak, much of the mass of cold air feed troughs to the north, not allowing the connection between the Azores anticyclone and Scandinavian. If this link if we produce cold starter, nothing exceptional but is likely associated with precipitation, if there is no connection we have nothing more than a small drop in temperature and possibly some precipitation on the coast.

In the Japanese model, even better than the cold starter next week is what would follow, with the possibility of a discharge polar brutal throughout Europe, with the anticyclone positioned correctly so you can get to the Iberian Peninsula.

Looking at the average of the ECMWF ensemble, one can say that the operating output is clearly an outlier, is fully offset, to say it's absurdly nonsensical.

I still maintain that the changing pattern is there, it is quite likely that the models are not usually steer well at these times, and tend to exaggerate the Atlantic circulation.
[link to www.meteopt.com]
Luisport (OP)

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01/07/2013 04:39 PM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Matthew Hugo‏@MattHugo81

Signal for increasingly colder temps evident on these sets of charts - [link to meteoalerte.com] …
Anonymous Coward
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01/07/2013 04:43 PM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Weather change in Denmark, from very mild, to cold...in some days

[link to www.dmi.dk]
Luisport (OP)

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01/07/2013 04:45 PM

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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
Weather change in Denmark, from very mild, to cold...in some days

[link to www.dmi.dk]
 Quoting: Anonymous Coward 31564638


ohyeah yes, polar cold air will enter in europe
Anonymous Coward
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01/07/2013 05:43 PM
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Re: 2013 Polar Vortex Collapsing; Complete Disintegration Possible!!! US, North Europe, Midle East Hit!!!
They have changed our fire map. The whole of Tassie is red.

[link to www.fire.tas.gov.au]

Opps sorry wrong thread.

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