Wind indication formal description missing: ↙4km

[UweTheSailor]

First of all thank you! 🙏🙏🙏 This way of acquiring the weather is really amazing!!!
However, I went down a bit of a rabbit hole....
I could not find any explanation on the wind indication on the main page: https://github.com/chubin/wttr.in

To make sure to interpret the wind correctly, can you confirm that the arrows indeed indicate the following:
South: ↓, Arrow Down, meaning the wind is coming from south
North: ↑, Arrow Up", meaning the wind is coming from north
West: ←, ...
and East: → ...

Basically can you confirm the following assumptions:
a) Wind direction is always determined by where the wind is blowing FROM, not where it is blowing towards
b) And the arrows indeed indicate the direction where the wind is coming from, as shown above?

Thank you!