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Mid to Long Term Discussion 2019


Upstate Tiger
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The key idea of us moving to a cooler pattern was for the bulk of the closed low (or lobe of the Tropospheric Polar Vortex) over central Canada moving into southeast Canada.  With the bulk of it instead moving to Alaska, we are left with a developing, mild, west to east zonal pattern.  BUT, over the past few weeks, each time the models move toward a mild look in the medium and long range, they flip and move back toward a cooler look, and vice versa.

oWH6Yms.gif

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41 minutes ago, griteater said:

The key idea of us moving to a cooler pattern was for the bulk of the closed low (or lobe of the Tropospheric Polar Vortex) over central Canada moving into southeast Canada.  With the bulk of it instead moving to Alaska, we are left with a developing, mild, west to east zonal pattern.  BUT, over the past few weeks, each time the models move toward a mild look in the medium and long range, they flip and move back toward a cooler look, and vice versa.

oWH6Yms.gif

Yep, that last part there is an especially good point.  I would be surprised if we torch for any length of time.  Doesn't mean I can't be wrong, but things are acting very Ninoish right now.  Lots of activity, lots of energy, lots of changes.  The background seems to want to be cooler than recent winters, though.  I feel like the intangibles are on our side this year.  I think they will help as the Pacific improves.  And...I think they will help the Pacific improve/not become dreadful.

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Well, the CPC certainly doesn't offer much hope in regards to an active pattern for the next 7-14 days. Below average precip for the whole Eastern Seaboard. Our chances for winter weather are quickly making that inevitable cliff jump that we seem to make every couple of days...Hopefully the New Year will offer some hope.

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With such an active STJ moisture will not be the problem (it usually isn't). But, despite the general coolness so far, there hasn't been any semblance of cold, outside of the November front, and we'll, that was November. If we can't get any real cold to come down, the "below normal" temps and generous moisture won't deliver anymore snow than we've seen so far, just more of the same. We'll see what happens with the MJO heading to more favorable phases and go on hoping the NOA actually goes in the red for a bit, but somehow we'll have to see some cold if we we want frozen. It just hasnt been there yet, but lots of time to go. 

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0z Euro was close with a southern slider but the high slides off too quickly.  Still, the players are there.  Good to see the Ontario/Quebec ridge which is a feature seen in most significant winter storms for our area.  That keeps the dreaded great lakes low away. Just need to see the southern low closer to the TN valley at this time frame.

YZNlgI4.png

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To the pessimists: The GFS is an outlier. Temperatures are barely marginal. About 6 things need to go right for this scenario to come into fruition. Good luck accurately predicting how the vorticity will contort itself as it journeys over the rocky mountains.

To the optimists: There is definitely a future on the table that includes this trough getting its act together and becoming a sharp trough or even an ULL. The GFS shows this scenario would unleash full chaos mode with a wild coast storm and potential for snow even with marginal temperatures. 

Yeah, a major coastal storm with patches of heavy snow in select lucky areas is an irresponsible forecast. But this is still worth keeping an eye on. 

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