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Continued Winter Banter.


Ericjcrash

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Broken-Record-psd53198.png

Classic. Very nice job on your forecast by the way. February is going to have plenty of fun and games. This is not a snow pack winter as evidenced by how fast the current snow is melting. So if we get a couple cutters and inland bombs that's just fine because I think we have at least three more 6+ storms for the coast

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Classic. Very nice job on your forecast by the way. February is going to have plenty of fun and games. This is not a snow pack winter as evidenced by how fast the current snow is melting. So if we get a couple cutters and inland bombs that's just fine because I think we have at least three more 6+ storms for the coast

 

 

Hey man , Thank you . It  looks like a lot of the pack will be gone before it snows again . ( going faster than I orig thought ) The warm up although probably only 5 days may mean business .

 

However the look in FEB overall at least from this distance looks good .

 

1st Jan 31 - Feb 4 look to be about plus 4 to me .( AG and I agree- I hope  ) .

 

Then the period could begin to take shape .  Feb 5 - 20 look BN to me . I am not concerned with by how much but I am much more intrigued with the set up once again at 500 .

 

Many are in love with the  actual departures and N is not a bad thing   but what`s more important to me is what we look at 500mb . The period should advertise a   -EPO/+PNA/-AO regime again .

There will be a trough in the means in the SE during the period and all it will take is another well timed vortex during a PNA spike  and we are in the game.

 

This year we have  the potential to have more than just 1 big time event .  Our best chances like to come at the back end of patterns so sometimes one just has to be patient .

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Hey man , Thank you . It looks like a lot of the pack will be gone before it snows again . ( going faster than I orig thought ) The warm up although probably only 5 days may mean business .

However the look in FEB overall at least from this distance looks good .

1st Jan 31 - Feb 4 look to be about plus 4 to me .( AG and I agree- I hope ) .

Then the period could begin to take shape . Feb 5 - 20 look BN to me . I am not concerned with by how much but I am much more intrigued with the set up once again at 500 .

Many are in love with the actual departures and N is not a bad thing but what`s more important to me is what we look at 500mb . The period should advertise a -EPO/+PNA/-AO regime again .

There will be a trough in the means in the SE during the period and all it will take is another well timed vortex during a PNA spike and we are in the game.

This year we have the potential to have more than just 1 big time event . Our best chances like to come at the back end of patterns so sometimes one just has to be patient .

Climo favors mid February for us too. Throw slightly below temps and all that energy in the southern get and things will go boom again

That's right I'm calling it right now we have at least one more major event in the pipeline!!!

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Climo favors mid February for us too. Throw slightly below temps and all that energy in the southern get and things will go boom again

That's right I'm calling it right now we have at least one more major event in the pipeline!!!

Sounds good! What would you call major in our new post 2000 climate? 12+?

-Jason

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With what appears likely to be a minor or perhaps moderate stratospheric warming event in coming days, rumors of a sudden or major stratospheric warming may well ripple across Social Media and the Blogosphere. Such speculation should be taken with a large dose of caution, as it would be disconnected from the actual guidance. Data from the FU-Berlin site from the latest ECMWF guidance is below:

 

Strat01272016.jpg

 

The top chart shows stratospheric temperatures (°C) forecast at 120 hours, the forecast peak of the upcoming warming event. The data shows that the peak warming is limited largely to the top 5 mb of the atmosphere. Subsequent frames show a gradual cooling without a downward propagation of the warming that one typically witnesses during a significant or major warming event.

 

The second chart shows the 10 mb and 30 mb temperatures relative to the 30-year mean. They briefly bump somewhat above the 30-year norm before cooling. For major warming events, one would expect to see both temperatures reach or exceed -30°C.

 

The third chart shows the zonal wind. Neither the 10 mb nor 30 mb wind ever reverses direction. They don’t come close. Reversals are characteristic of significant stratospheric warming events.

 

All said, at present the guidance shows a modest and short-lived warming that does not propagate downward. While there is still some possibility that the guidance could be incorrect as a five day timeframe pushes the limits of reliable stratospheric forecasting, the guidance is now moving close to a reliable forecast horizon. As a result, the probability of a large correction in the guidance toward a significant or major stratospheric warming event in the near-term is falling.

 

For now, the guidance suggests that a minor or perhaps moderate non-propagating stratospheric warming event is imminent. 

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