Understanding a wind vane

[The Indomitable DrugS]

I'll use the wind vane I have for AQU ...



This sh!t is incredibly annoying and confusing for me.

What does the red arrow in the above wind vane mean? I'm confused by it because it's in different places for wind vanes of different tracks.

Also - I assume a wind listed as 'N at 20MPH' is going from the North to the South at 20 miles per hour?

I would have thought the opposite - but looking back several years in chart books - when the wind is 'N-NW at 20 MPH or more' are days when a backstretch headwind is most obvious.

You get a 30 MPH N-NW wind - and you start seeing the opening quarter of 6f races on the Inner going in 23.80 and 24.20 - while the opening quarters of 8.5f races are going in 22.90 and 23.20 on the same card.