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GOOD CHANCE OF 1ST LIGHT SNOW EVENT VA / nw NC/ MD DEL MONDAY DEC 7


DTWXRISK
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1 minute ago, Ralph Wiggum said:

DT said the GFS is trash and doesn't handle STJ properly. We're still in the game....if it's a fully loaded 6-shooter roulette game anyway.

Look at the amplitude and orientation of that ridge. The axis is literally over top the shortwave. I doubt it's even meteorologically possible for it to do anything other than slide straight off the coast.

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47 minutes ago, WEATHER53 said:

I don’t see suppressive high pressure 

If this does get squashed...and not saying it does...we dont know yet, but it would be the suppressive flow behind the bombing storm in Nova Scotia not a high that is the culprit.  The upper level flow is pretty compressed and there are too many pieces of energy diving down, we would need a little more space between systems and for the energy to consolidate and phase into the southern feature a little further west.  Instead pieces of NS energy are diving down on top of it.  

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2 hours ago, WinterWxLuvr said:

In all seriousness, with as delicate of a setup as this is with timing and spacing, I don’t think I’ll be giving up on this yet. Probably have to wait a few more cycles for that.

 why give  up? 

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2 hours ago, NorthArlington101 said:


GFS does have the uncanny ability to be right when it isn’t showing snow, so probably.

 GFS   still   is     BAD  with east coast   winter  storms  past like  60 hrs.... and  really bad  past 72 hrs.   
Consider the  northeast  Noreaster  about to   develops... 3  days the   Low  was in   WVA /    far sw  VA 

 

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These 2 features are the big problem. 

problem.thumb.png.6c2a940301f7c14bcccb79a0ce0045f9.png

Instead of escaping northeast "clean" just in time...there are 2 pieces of NS energy diving in interacting with the bombing vortex to our northeast.  Those pinwheeling features hold the vortex from escaping (fujiwara effect) and squash the heights so that nothing can amplify behind it.   The euro has a healthy enough feature out ahead of the upper low to get some light snow up into the area but  without solving that bigger problem to our northeast there is a pretty low cap on what this is capable of.  But some minor improvements with those features and relax the flow over the top and this could become something.  Time is running out though.  Most likely we simply get to experience our first fail of the year courtesy of crappy spacing between waves.  

 

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3 minutes ago, psuhoffman said:

These 2 features are the big problem. 

problem.thumb.png.6c2a940301f7c14bcccb79a0ce0045f9.png

Instead of escaping northeast "clean" just in time...there are 2 pieces of NS energy diving in interacting with the bombing vortex to our northeast.  Those pinwheeling features hold the vortex from escaping (fujiwara effect) and squash the heights so that nothing can amplify behind it.   The euro has a healthy enough feature out ahead of the upper low to get some light snow up into the area but the euro has been really overdone with energy in the mid range lately and without solving that bigger problem to our northeast there is a pretty low cap on what this is capable of.  But some minor improvements with those features and relax the flow over the top and this could become something.  Time is running out though.  Most likely we simply get to experience our first fail of the year courtesy of crappy spacing between waves.  

 

 good post/ analysis....    FWIW   the GFS is  mishandling the    closed 500 low in Maine/ se  Canada  

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15 minutes ago, DTWXRISK said:

 good post/ analysis....    FWIW   the GFS is  mishandling the    closed 500 low in Maine/ se  Canada  

Thanks.  Glad you're back posting analysis again!  There is still time and frankly all guidance has been pretty volatile and unstable with these NS vorts in the medium range but we need some help here.  There likely will be error in those features but we need that error to break our way.  I need a little more help up here than the southern half of this region.  

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4 minutes ago, losetoa6 said:

Eps shows more interaction with the 3 sw's but that pesky ne low is dug in like a tick .

It is "better" hence why we get "some" snow.  Mood flakes mostly.  But even the euro dives some energy into the trough to our northeast and phases into that vortex which slows it down, amplifies it and creates an extension of the lower height field to its southwest which acts to compress the flow some over top of us.  Some is still too much when you have a vortex just northeast of Maine!  It's not hopeless...but we need another degree or two of separation between those features.  Any little piece of energy that works in the wrong way is a big deal.  

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48 minutes ago, psuhoffman said:

If this does get squashed...and not saying it does...we dont know yet, but it would be the suppressive flow behind the bombing storm in Nova Scotia not a high that is the culprit.  The upper level flow is pretty compressed and there are too many pieces of energy diving down, we would need a little more space between systems and for the energy to consolidate and phase into the southern feature a little further west.  Instead pieces of NS energy are diving down on top of it.  

Thanks, good info

It may carry itself out but not a high squashing it. 

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