I’m not sure if this is a new issue, or just a local because I am not using the correct options in iOS, but I can’t always get the app to rotate it I change my phones orientation. It works the iPad and I’m sure it used to work on the iPhone. Noticed on a iPhone 15 Pro Mac under iOS17 and also my old iPhone 8 under iOS16. Apologies is this not a but but I always prefer to report.

@yves70 Many thanks for this. It puts a new light on everything.

@idefix37 Many thanks. That is really cool. I'm really impressed by this - it's an insight into another world.

I’m not sure if this is a new issue, or just a local because I am not using the correct options in iOS, but I can’t always get the app to rotate it I change my phones orientation. It works the iPad and I’m sure it used to work on the iPhone. Noticed on a iPhone 15 Pro Mac under iOS17 and also my old iPhone 8 under iOS16. Apologies is this not a but but I always prefer to report.

@yves70 Many thanks for this. It puts a new light on everything.

@idefix37 Many thanks. That is really cool. I'm really impressed by this - it's an insight into another world.

A simple question but, currently affected by a cold spell from the east (UK news, 2021-02-03, the Beast from the East II) potentially non-trivial, is it possible to show where our current air mass came from?

You could just use Windy to follow the current wind flows backwards but that would not be correct because to back trace the path of a current air packet you need to integrate against increasing distant past and not current flows. I'm trying to work out in my head what a solution to this problem would look like but I suspect it may be a well studied problem. Also air move between different altitudes? Unfortunately, I don't know anything about fluid dynamics. The question is real however: as some one asked "does this snow come from the North or from Russian?"