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January 6-7 Storm Discussion: we’re due?


WxUSAF
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1 minute ago, psuhoffman said:

The eps has been a false positive. At longer leads the ensemble will have a more expensive snow shield due to spread. As the lead shortens it will tighten up as variance decreases. You don’t want to be near the southern area of the snow ok an ensemble at 72+ hours. As the gradient tightens you’ll usually end up on the wrong side. 

true

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1 minute ago, psuhoffman said:

The eps has been a false positive. At longer leads the ensemble will have a more expensive snow shield due to spread. As the lead shortens it will tighten up as variance decreases. You don’t want to be near the southern area of the snow ok an ensemble at 72+ hours. As the gradient tightens you’ll usually end up on the wrong side. 

18z definitely tightened up the goal posts.

Are we at the end of the ensembles being useful for this event?

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2 minutes ago, Chris78 said:

18z definitely tightened up the goal posts.

Are we at the end of the ensembles being useful for this event?

Getting there but in a case with divergent camps they can still be useful.  It the op will be better at details and thermals. 

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7 minutes ago, Chris78 said:

18z definitely tightened up the goal posts.

Are we at the end of the ensembles being useful for this event?

Did by “tightening up” did you mean “move far away?”

lol

I’m down on this one, don’t think this is trending in the right direction. 
 

Surprise me. 

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This will come down to a game of watching temps Friday Night with lows in the mid to upper 20s with clear skies giving way to increasing clouds across much the forecast area sw to ne. Where temps drop enough before the cloud cover comes in will help greatly. Check your temps if you're low to mid 30s overnight Friday..... I'm expecting the typical slop across the area from heavy rain to heavy snow and everything in between.

 

EDIT-High IMBY Saturday is 35 low 31 Saturday night. Temps running 2-3 degrees colder Friday night and holding thru Sat early afternoon changes a lot.

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1 minute ago, eddygeeme said:

This will come down to a game of watching temps Friday Night with lows in the mid to upper 20s with clear skies giving way to increasing clouds across much the forecast area sw to ne. Where temps drop enough before the cloud cover comes in will help greatly. Check your temps if you're just at or above freezing late night Friday.....

well so far DCA hasn't been below freezing since before Christmas, and even up here around 400 ft in Tenleytown we have just barely grazed the freezing point.  Hopefully the air mass in place in a couple days can push the temps down a bit.

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5 minutes ago, jayyy said:

One thing is for sure… NAM has an actual system there, which is certainly better than 18z’s depiction of a non system


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Hopefully it is picking up on better thermals and the ops are right with the amplitude and track.  At this range, both of these can be true

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