What does % mean on the extreme temperature map?

@idefix37
I don't know how you created this image because I don't see a slider. Do you have a newer version or trial version? I was actually asking if there was a simple option to just show the jet stream, not the complex image you have captured.

Is there a way to show jet streams? I think it would be useful to show them, yet I can't find any references to them in Windy

What does % mean on the extreme temperature map?