Question WX Trivia

Discussion in 'Alpine & Southern' started by POW_hungry, Jan 10, 2018.

  1. POW_hungry

    POW_hungry Part of the Furniture Moderator Ski Pass: Gold

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    Here's one for the brains trust, anyone want to have a go at explaining the shift in heights (-) for the Antarctic Region in which GFS/EC has progged for the next fortnight?
    Merely by 'eyeballing', the run starts with an avg of ~522 dam and transitions to an avg of ~504 dam. Probably not a big shift but an obvious one at that.

    Currently, there's no huge stratospheric anomaly so I am guessing it's more in the mid/lower-levels?
    [​IMG]
     
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  2. POW_hungry

    POW_hungry Part of the Furniture Moderator Ski Pass: Gold

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    No takers? From what I can understand it's generally indicative of colder denser air, which in-turn influences a lower 500mb height.
    So this would indicate the presence of an area of Low pressure at the surface. An overly developed Summer pattern for the South Pole region perhaps?
     
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