Hi just a feedback the visibility feature is totally off track. Giving example of Delhi last couple of days visibility is down to nill due to fog and smoke haze however windy is showing 16km or more .......absolutely incorrect you need to workout on that. Even cloud base is absolutely wrong
Note that Windy will probably not « workout that » because Windy only visualizes raw data provided by weather models from different national weather offices like NOAA, ECMWF...
It is well known that visibility is tricky to forecast and that weather models are not so good for this parameter.
Aeronautical specialists here may give you more information about this question.