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January 2016 Pattern Disco


Damage In Tolland

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That;s kind of why it reminds me of 92. Obviously not the same overall..but similar marginal cold. Maybe this is the elevation storm we've been waiting for , for many years..or maybe it's rain for all of SNE/CNE..time will tell.

 

lol 

 

there are a million storms with marginal cold.

 

92 had a giant high to the north - this has absolutely no similarity to 92. 

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People can analyze them all they want...just don't start a threat thread this far out, lol.

 

I'd add that the current solutions don't mean a damned thing. I'll wait until we're within skillful range.

 

I think the hardest part to wade through is the detailed posting about backyard forecasts that far out. Might as well have a threat thread then.

 

But I do think even at the far ranges we have things we can discuss. I mean the Euro may have no skill day 9 over New England, but at day 3 it may have skill for the shortwave over Kamchatka.

 

Of course it's hard to pull focus away from the snow headline.

 

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It's pretty amazing that this whole pattern change in the Arctic with the flip from +AO/-AO all stemmed from that weak little system that moved through New England on 12/27. 

 

The way that thing turned into a monster over Iceland and shook up the Arctic is pretty cool.

 

http://www.atmos.albany.edu/student/kgriffin/maps/dtpres/dtpres_arctic_loop.html

 

I blogged about it this evening if anyone is bored enough to give it a read... http://ryanhanrahan.com/2016/01/03/pattern-change/

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I think the hardest part to wade through is the detailed posting about backyard forecasts that far out. Might as well have a threat thread then.

 

But I do think even at the far ranges we have things we can discuss. I mean the Euro may have no skill day 9 over New England, but at day 3 it may have skill for the shortwave over Kamchatka.

 

Of course it's hard to pull focus away from the snow headline.

 

 

Last year, we created a model thread to have people analyze 200 hour threats and it worked pretty well to keep the pattern threads relatively clean. We may have to do that again.

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Last year, we created a model thread to have people analyze 200 hour threats and it worked pretty well to keep the pattern threads relatively clean. We may have to do that again.

 

I think there are things we can discuss and analyze, but I don't think the placement of the coastal front or ratios are among them.

 

I think far more interesting questions arise from the fact that the GFS is 30 dm too high over AK and how that affects downstream areas (disclaimer: the GFS may or may not be 30 dm too high over AK, it was just a hypothetical).

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Last year, we created a model thread to have people analyze 200 hour threats and it worked pretty well to keep the pattern threads relatively clean. We may have to do that again.

I agree, although we all wonder about our backyard.  But I think we can say several things with confidence:

  1. the upcoming pattern is conducive of cold and snow
  2. we have a split flow with a lot of energy in the southern jet
  3. there has been a consistent signal for precip over the weekend in the NE
  4. there has  been a consistent signal for arctic air next week
  5. there has been a consistent signal for a coastal storm early-mid next week
  6. pattern recognition and analogs (I think) suggest cold and snow is fairly likely over the next 2 weeks

 

Up here in this pattern in January I am less worried about precip type; I can understand more worry in SNE and MidAtl.  My takeaway is that it is going to turn stormier next weekend and the week after.  We will likely get 2-3 snows from light to perhaps heavy between Jan 9 and Jan 18.  I think that is a reasonable expectation and the details will get a bit clearer (at least for the weekend) on Tuesday I'd say.

 

I expect to transition from snow boots to snow shoes on my hikes starting early next week.  At this point I believe I will no longer see the tops of uncut grass in hay fields, perhaps until March.  We usually get a snow pack in excess of one foot for some part of the winter up here and that will probably happen next week.

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Yep. Hey look, I love cold and snow like anyone, but I think some have been trigger happy on the strat. So far so good for my thoughts. The Pacific definitely changed earlier than I thought thanks to MJO. However, I'm a little nervous it doesn't last. Still holding hope for Feb.

 

 

The VP200mb forecasts look better than they had previously. Keeps more forcing near the Dateline. As long as this occurs, I don't think the pattern completely collapses.

 

chi200.cfs.all.global.7.png

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It's pretty amazing that this whole pattern change in the Arctic with the flip from +AO/-AO all stemmed from that weak little system that moved through New England on 12/27.

The way that thing turned into a monster over Iceland and shook up the Arctic is pretty cool.

http://www.atmos.albany.edu/student/kgriffin/maps/dtpres/dtpres_arctic_loop.html

I blogged about it this evening if anyone is bored enough to give it a read... http://ryanhanrahan.com/2016/01/03/pattern-change/

Nice article. This loop shows it nicely at 500mb too.

http://www.cpc.ncep.noaa.gov/products/intraseasonal/z500_nh_anim.shtml

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The VP200mb forecasts look better than they had previously. Keeps more forcing near the Dateline. As long as this occurs, I don't think the pattern completely collapses.

chi200.cfs.all.global.7.png

starting to remind me of last year where the LR was initially forecast to collapse. Its really tough to break winter PNA once it gets its spurs dug in.
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starting to remind me of last year where the LR was initially forecast to collapse. Its really tough to break winter PNA once it gets its spurs dug in.

Especially in deep winter. Once the deck chairs are shuffled they do not typically move again for awhile but in order to dig in y have to have a pattern go 2 weeks or more. At least that's my cockamamie theory.

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Especially in deep winter. Once the deck chairs are shuffled they do not typically move again for awhile but in order to dig in y have to have a pattern go 2 weeks or more. At least that's my cockamamie theory.

 

Generally speaking models are too quick to build blocking and too quick to break it down.

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I decided to go ahead and make a model thread...use it for posting OP runs. Discussing ensemble analogs and stuff is fine for this thread like the stuff ginx posted above...but for discussing where the 850 0C line is on the 174 hour GFS, we'll use the model thread since it is totally meaningless to the pattern thread:

 

http://www.americanwx.com/bb/index.php/topic/47534-model-mezzanine/

 

 

Anyway, back to pattern discussion.

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