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December 14/15 winter storm threat


Typhoon Tip

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Lift is the same as vertical vorticity?  Is that seen at H7?

This is close to ASH...upward lift here is negative omega. The greater the negative value the more upward motion. Match up your best omega with the same pressure levels of your sounding and then find the temperatures in that layer of the atmosphere. If it's saturated and in the -12C to -18C temp zone you'll maximize your dendritic crystal growth.

 

http://coolwx.com/cgi-bin/getbufr.cgi?region=MA&stn=KLWM&model=gfs&time=current&field=omeg

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Yeah that would be the concern, but I'm starting to think this one may not.  With no blocking in the north Atlantic and a weak SE ridge, if it wasn't for that high pressure, this may have been a cutter, lol.  Thank god for that high pressure to the north otherwise there really would be nothing stopping this from turning ugly.

 

18z GFS ensembles were pretty wet and a bunch of them got the 1" QPF out into the East Slope.

 

f84.gif

 

 

I will say up here if we get 0.5"< of QPF at like 8 to 12 degrees, its going to be some freakin' dry snow, lol. 

 

Hoping for ratios.

 

21z SREFs mean SLP over ACK. 24h mean QPF is 1" over just about all of SNE up into SNH/ME.

 

Congrats, folks.  Dare I ask which area of SNE is not an inch?  :)

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