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Barometric trends & false forecasts.

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  • 24-05-2010 6:40pm
    #1
    Discodog
    Registered Users Posts: 15,899 ✭✭✭✭


    Has anyone else noticed just how wrong these "weather stations" that use a barometric trend are at the moment ?. My Oregon is adamant that it is going to rain despite there being not a cloud in the sky !. It's been like that for the past 2 days.


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    #2
    Su Campu
    Closed Accounts Posts: 4,279 ✭✭✭Su Campu


    They use an algorithm that takes into account the pressure tendancy over a few hours. With a high nearby, any movement in its position will lead to a fall in pressure at the station, which is taken as a possible precursor to less stable weather. As far as I know, these forecasts are around 70% accurate, and are valid up to 12-24hrs out.

    As with all automatic forecasts though, it's best not to trust them too much, and always go with the official met one instead.


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