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No hurricane has ever crossed the equator (i.redd.it)
submitted 2 years ago by to c/mapporn@lemmy.world
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[–] 50 points 2 years ago (2 children)

I believe it’s because currents of air rotate in the opposite direction. So to cross the equator the air would have to pass a boundary of global air currents which are going counter to the hurricane’s motion. See this picture for a reference.

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  • [–] 21 points 2 years ago (3 children)

    I knew it. Hurricanes are magnetic.

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  • [–] 5 points 2 years ago (3 children)

    So the thing about the toilet water spinning in the other direction in the south hemipshere is true?

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  • [–] 4 points 2 years ago

    In theory, yes. However other factors such as the shape of the drain, the shape of the toilet bowl, and any small initial motion in the water, usually completely overwhelm the coriolis effect. You would only be able to observe it under extremely carefully controlled conditions: extremely still water, and a completely symmetrical toilet bowl perfected to extreme, micron precision.

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  • [–] 1 point 2 years ago (1 child)

    For something like a toilet where water is staying into it, the force of the spray itself is all that really matters. But, for water that is still (pulling the drain on a bathtub), then yes, absolutely this is true. The spin will be the same as a hurricane (depends in hemisphere), and for the same reason.

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