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Flaking Our Way Into MLK Weekend 1/17-1/18


Clinch Leatherwood

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Just looking at the GFS, it's the circled energy that it has diving through the Lakes in 30 hours.  The Euro has no interaction at all, it rounds the base and shoots across the lakes eastward.  The GFS dives down towards the southern low. 

 

GFS is almost always too fast with these southern systems aloft.  If it is slowed to consensus the timing blows and it's what the Euro and others have.  I don't know if it's the setup north of the Dakotas being different tonight that drives the speed differences/timing differences later on the east coast, or if it's meaningless because if the GFS is adjusted for normal speed bias slower, the timing is off anyway.

 

I think it resolves in this run tonight regardless. 

 

Adjust the GFS a few hours slower in the south and you don't see the same interaction, you end up with the scrape ensemble members being the way to go.  Adjust down for the few bigger hits on the ensembles and 1-3" is the way to go west to east (in terms of QPF .1 to .3 west to east for now.

 

Something has got to give at 0z I think. 

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East, means little but I am waiting until this shows it's face. Let's see how powerful that confluence is, as you well know everything has been delayed this year Northern Stream wise.

This will happen at 0z end of story, cape is nowcast but if its coming west it happens at 0z end of story,pinkies crossed.

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4-8" outer cape 2-4" near bridge 1-2" se of brockton preliminary calls.

 

If I had to make a call right now it wouldn't be more than 1-3" on the Cape, coating to an inch NW of the Rte 25/3 area.  Probability of that happening at about 60%.  There's still a chance for quite a bit more on the Cape but I cannot begin to make heads or tails of the implications of minor impulses in the flow.  The GFS speed bias is probably the biggest thing in my mind for being so cautious, without it, it's mainly a whiff...Euro ENS type deal where .1" is pushing the envelope.  The NAM at 18z was a demonstration how very minor changes can take this from 4" of snow to nothing, or 2" to 6". 

 

We shall see, most of these systems this year end up a little further north in the end.  Doesn't mean this one will.

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This does suck as Forky pointed out last night, another 30 hours later of that ejection of the southern stream vort max and we would be surmising dryslots. The Gulf is wide open, nice STJ and instead we are facing suppression and looking for Arctic squalls. Could have been a contendah. Next serious shot seems to be Miller B . Late next week although in this pattern things have a way of popping out of the blue.

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This does suck as Forky pointed out last night, another 30 hours later of that ejection of the southern stream vort max and we would be surmising dryslots. The Gulf is wide open, nice STJ and instead we are facing suppression and looking for Arctic squalls. Could have been a contendah. Next serious shot seems to be Miller B . Late next week although in this pattern things have a way of popping out of the blue.

bummer how 22 is going by the way side. We need a big one during these next three weeks to validate this potential.

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