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NYC/PHL Dec 26-27 Potential - Part 5


am19psu

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the euro is known for making small run to run corrections. looks like we got exactly what we didn't want to see...a slight jog to the west leaving all of us wondering who to believe. Sounds like at the moment a comprimise between the GFS and Euro are on order. Perhaps similar too or slightly less than the JMA. All major models shifted northwest...some more than others...so it would appear their is something going on here a little deeper than initialization errors. I'll be interested to see if the euro ensemble mean shifts westward.

the euro is further east...0z gave sne good qpf this run it gives them virtually nothing outside cape cod and ack...even that was cut down significantly

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the euro is further east...0z gave sne good qpf this run it gives them virtually nothing outside cape cod and ack...even that was cut down significantly

yes Tombo...it was based on how it looked per your discussion at 48-54rs. Then from what I understand it shifts eastward. You mentioned it sped up the S/W slightly..I wonder if that is causing the differences. Seems like the other models have been trending slower.

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I think I'm just about done with this. The Euro is actually EAST of its prior runs, other models shifted west but not hugely, and the GFS clearly suffered from init errors and should be tossed, in all likelihood it shifts back east later. We really need a perfect setup to get us our storm at this point and the window is about closed. It doesn't mean we see no snow, but I wouldn't count on amounts much greater than a few inches. Time to move on.

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The UKMET did not shift at all.

NOGAPs didn't move either and although it stinks it didn't trend which is probably the key. GGEM came west some but as NCEP notes:

THE NEW UKMET/CANADIAN ARE DIFFICULT TO EVALUATE FOR

INITIALIZATION SINCE WE RECEIVE A LIMITED AMOUNT OF DATA.

HOWEVER...THEIR SOLUTIONS LIE WITHIN THE EASTERN HALF OF THE

GUIDANCE ONCE THE INDIVIDUAL TROUGHS PHASE TO PRODUCE THE

DEEPENING LOW OFFSHORE...WHICH HAS CONSISTENTLY BEEN THE CASE.

THUS...INITIAL RECOMMENDATIONS ARE PRESERVED WITH CONTINUITY MOST

PREFERRED.

Embarassing that these types of errors can arise in 2010.

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I think I'm just about done with this. The Euro is actually EAST of its prior runs, other models shifted west but not hugely, and the GFS clearly suffered from init errors and should be tossed, in all likelihood it shifts back east later. We really need a perfect setup to get us our storm at this point and the window is about closed. It doesn't mean we see no snow, but I wouldn't count on amounts much greater than a few inches. Time to move on.

I thought I'd moved on yesterday, then the GFS sucked me back in. I admit, I'm a sucker :arrowhead:

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yes Tombo...it was based on how it looked per your discussion at 48-54rs. Then from what I understand it shifts eastward. You mentioned it sped up the S/W slightly..I wonder if that is causing the differences. Seems like the other models have been trending slower.

yea initially like you said it was closer to the coast, but that could of been thrown off cause of how slow it was not sure...in the end its a good bit further east...who knows

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yea initially like you said it was closer to the coast, but that could of been thrown off cause of how slow it was not sure...in the end its a good bit further east...who knows

That was the big change on the 12z GFS, you could see how it accelerates the southern S/W at 24 hr. It lags behind on the euro, no one should really be jumping yet.

I would if the shortwave becomes slower on the 18z GFS, though.

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