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Jan 4-6 Coastal Bomb


Baroclinic Zone

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2 minutes ago, WintersComing said:

Is it me or does it seem like GFS and Euro to some extent are having a hard time figuring out that convective mess at the beginning of the storm formation down near FL?

Many times it can be a broad area of low pressure and models struggle where to put the exact low. For instance it could be a huge area of 996mb with a weenie 995.6 pocket and the model will drop a L there. In reality my example shows you that the exact position can vary and doesn’t mean a whole lot there. Once things kick into high gear and intensification occurs, it becomes easier for models to show the exact area of low pressure.

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The gfs has been doing this for like a decade.  At least its a standard relatively correctable bias.  I'm not sure why we can't build a model that doesnt do this. It has the worst progressive cyclogenesis bias against all the major world models.  And getting the high impact stuff right does matter regardless if your 5 day height rmse. 

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I think Will said it earlier, we keep seeing corrections further north and west on practically every cycle before the ene kick. I looked back at initialization and the correction begins there, but it eventually ‘fades’ out after 36 hours or so. If we keep these corrections coming at initialization tonight and tomorrow....then I think this comes inside the BM just a bit more before the kick. 

 

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