Wind accumulation - what is being displayed?

[mrmross]

The rain accumulation layer offers you the next 12hrs - 10 days but I don't understand what the wind accumulation shows - the bottom slider is hour to hour but the imagery doesn't move over the whole of the period?
Please can someone explain what I'm viewing, is it an aggregate of the winds for an area, if so over what period? & why is the hour to hour slider moveable yet nothing changes (other than the wind movement animations that can be viewed in the other wind layer modes too)

[Gkikas LGPZ]

@mrmross
https://community.windy.com/topic/6672/wind-accumulation-let-you-track-the-hurricanes