If you can see it, it is visible. If you cannot it is not visible. Quite simple, really.
Chat with our AI personalities
Visibility does not depend on speed.
Non eideaid
Means the business is online as well as a shop
It depends mainly on the visibility - how far you can see.
Its not really calculated, its live information from people in those areas. There are numerous volunteers around you that collect weather data and send this information to the state that you live in and also to the local broadcasting companies. They report wind speed, direction, precipitation, temperature, barometric pressure, humidity and visibility. The ones that I know of around me are automated. They are programmed to call in at pre-set intervals. Most visibility reports are from air traffic control towers where this information is vital to normal everyday operations of an airport.