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Central PA Winter 2024/2025


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52 minutes ago, Jns2183 said:

I don't feel anything was that abnormal with the 700mb and 850mb FGEN except for we are more used to it occurring in a coastal and having a more sw-ne orientation. The HRRR coming so far north last night was definitely a sign since the 700mb FGEN seems to set up on the northern edge of the precipitation. The mesoanaylais from late last night definitely showed the forcing there setting up around I-80. It's all amplified by the precipitation moving parallel to the forcing. Lots of times in coastals the forcing at least swings through the entire area at some point even if it sets up and lingers over an area more. The models definitely struggle more than normal with the 700mb FGEN compared to the 850mb it seems. I have no idea why.

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The HRRR last night (18Z) did have an area of banding about 2/3 up into PA.  Pivotal does not have the product to see if was suggested 700 fgen.  It does show 1-2" up there, think they probably got more, but something is still missing from the equation when you look at the snowfall map for say Lanco or just under the border in Northern MD.    It had to be forecasting more forcing there for those 6-10" totals which ended up being 3-4".  Not sure many if any models depicted what happened in the LSV and N MD.

 

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10 minutes ago, mitchnick said:

Bigger flakes have now shown up as that stuff out west and NW is arriving.  I really think many of us will be pleasantly surprised. Obviously, it will take some locational luck, but doesn't it always?

I will opine that anyone who is wrapping up the snow totals and judging forecasts off them is risking be off base.    All the forecast and snow maps were for the entire storm, not just this AM. 

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Interesting and obvious thoughts in the MA forum.  I say obvious because they are but not sure I had thought of it yet.   We were so gung ho on using Kuch because of the antecedent cold air but if one looks at the 10-1 maps maybe the model outputs were a bit more realistic.  QPF in Lanco was 2-3" on a lot of outputs....10-1 that is 2-3" of snow.  It is almost 30 degrees here right now.  Kuch may have over done it this time (sometimes Kuch is lower of course but obviously much higher up this way for this storm.)

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