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December 2021 Obs/Disco...Dreaming of a White-Weenie Xmas


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It's continuing to become more and more clear that there is one helluva gradient pattern that is going to become established. If we can cash in on that we could get smoked. The pattern will be extremely active and there is just so much available moisture. Not only that but we would be feeding some high theta-e (for the time of year) into any potential systems. On the other hand, for as cold as it will be north of the gradient it will be just as warm moving south of the gradient so we could easily be more influenced by warm air and warmer systems. The degree of baroclincity is going to be super high (which has lots of positives but will have some negatives as well). 

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Just now, weatherwiz said:

Thank God those maps tend to overdo freezing rain totals. Probably b/c it's using accumulated QPF vs. accretion (?)

Yes. They are always overdone. In addition, radial ice is what we care about...so even if you actually do get flat surface ice to accrete half an inch, it will be more like 2 tenths radial.

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Just now, CoastalWx said:

LOL every model is different. It's like a weenie advent calendar. Every day you open up the models and see a different solution. Hell every 6 hours. 

We have models bringing rain into CNE for Xmas and then some that crunch it southwest and give Greenwich CT snow while Ray is smoking cirrus. Basically a clown show on guidance....but we kind of knew this was coming. I posted that map yesterday that showed all those ridiculous shortwaves offshore.

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9 minutes ago, ORH_wxman said:

Yes. They are always overdone. In addition, radial ice is what we care about...so even if you actually do get flat surface ice to accrete half an inch, it will be more like 2 tenths radial.

Those maps aren't even estimating accretion though...just the amount of QPF in the form of ZR. Weenies just aren't using the maps correctly.

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Just now, dendrite said:

Those maps aren't even estimating accretion though...just the amount of QPF in the form of ZR. Weenies just aren't using the maps correctly.

Yes....I know. I think there are some maps out there that try to estimate accretion, but even those are "Wrong" because they focus on flat....when radial is what causes all the damage.

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