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Feb 8th-9th Potential Significant Coastal Storm


dryslot

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The only thing that could make a solution like that any better for the storm-heads is if it slowed down.  The GFS is still sling-shotting it seaward with a good bit or rapidity.  I think though that it may be a bit on the fast side of the envelope, and owing to its native progressivity bias ... it may not be the right tool for the job in this case. 

 

We discussed how the GFS might resurface with its fast bias, once the flow slowed a little.   

 

Anyway, I just passed over the entire evolution of the mid level impulse(s) starting at the 0 hour and going out to 84 on the 12z NAM;  it's fascinating, but between now and 12 hours from now, there is almost 0 indication/observation in the run that there is even a S/W present in the flow - much less any feature capable of that kind of horror. Yet, as you click into 30 and 48 hours ...etc, it just seems to emerge out of no where, getting sharper and sharper, then, a weak southern stream 500mb "dent" (for lack of better word) whips around the eastern flank of the trough as it nears the upper MA, around 60 to 66 hours and booom!   It cores out a 4 contoured hole in the atmosphere just absolutely in the perfect idealized location relative to SNE. 

 
Now seeing the GFS do the same thing, albeit faster to complete the deed, and considering the Euro's recent consistencies with this, the confidence has gotten high for a higher ...if not severe impact event.  
 
I am also concerned about the New Moon and if there is a spring tide associated..
 
Wind:  That kind of rapid cyclogen in differential to a 1035'ish MB polar high parked quintessentially perfect for imposing a very steep gradient should bring a wind hammer.  Not so much in the interior, but if a CF sets up, anywhere on the oceanic side is likely to damaging gusts.  One saving chance is that often rapid deepeners will pull the wind vector into cross isobaric flow, and that nuance about this system, if so, may mean less velocity with more backed streamlines.  
 
QPF:   no words!  It's hard to imagine that deep layer evolution can take place that way with out lighting and thunder, and it forces one to ponder if the big giant choking numbers are in fact thunderstorm output in a snowing column.   Frontogenic forcing has got to be ludicrous here - 
 
Meso:  Deformation,  frontogenic meso band with convective output,  flop-side CF are all likely to produce embedded local maxes and it is virtually impossible to know where those band will align.  Anywhere in between still gets pummeled here...  This type of layout is one where for at least one interval 3 to perhaps 6 hours, the rad presentation is quite uniform.  Top tier scenarios do that.    But I suspect the GFS is too fast to propagate the deep layer vortex eastward when it closes and captures the sfc system; typically this physical process will compensate for the background motion for at least a time as the sfc low can even stall and move NW for an hour or two.  Just about as that is ending is when the rad may part into banded features that are rocking and rolling.  

Wow, I'm going out for a smoke

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Question for Dryslot.....Do you know off hand what the NAM qpf is for Augusta area?? curious....But overall one insane weather event coming...reminds me of the big storms back in the 70's..I was up here for the bliz of 78 in Augusta...I was actually taking pictures for the Kennebec Journal at that time..

Thanks

Craig

http://northeastweathereye.com

Augusta

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Leaning that way. Today might be the last day I can physically attend classes. I'm so excited lol

 

If models don't change too much...its not even close...go back home. You might get 18" of fluff up there but if you do, its probably 25-30 inches of denser snow down here.

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Bob, whats your thoughts for the rt44 area?

 

I'm waiting on the rest of the 12z suite to come out before I jump all in.  Right now I'm leaning towards a huge hit for the SE MA area.  Right now it looks like we'll get the initial WAA snows as the southern stream rolls up the coast and as the northern stream dives in and captures it, we'll have the CCB snows kick in.  There might be a sneaky warm layer in there that may give us some sleet, verbatim.  This looks like a classic BM storm with a slight "stall" that would prolong the system for a few hours (6-8hrs)  If I was to worry about a changeover time, it would be in that transition time as the 2 systems merge S of LI.  Timing of that is critical.  I feel confident about 6-10" falling right now based on what I see.

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Question for Dryslot.....Do you know off hand what the NAM qpf is for Augusta area?? curious....But overall one insane weather event coming...reminds me of the big storms back in the 70's..I was up here for the bliz of 78 in Augusta...I was actually taking pictures for the Kennebec Journal at that time..

Thanks

Craig

http://northeastweathereye.com

Augusta

 

 

3.16"

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People get ready. This deserves to be hyped starting this afternoon in the media.

 

 

It's interesting to "possibly" go well beyond the average seasonal snow totals from a single event.   ...Particularly when going from a deficit to an event-ending total that could so far exceed. 

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I'm curious if anyone could do a comparison between the setup for this storm and the storm which hit Nova Scotia/ Newfoundland on Monday.  Is the set up similar but a few hundred miles west?  It deepened very rapidly from 1000 mb down to 950.  There have been a couple of bombs out in the Atlantic and I was wondering if they are comps at all.

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