Answer:
There is someone, and there is always another, for without the other, there wouldn't be one
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
My thunder comes before the lightning. My lightning comes before the clouds. My rain dries all the land it touches.
Grows from the ground, bushes and grass, leaves of yellow, red and brow, unruly plants, get the axe, trim the hedge back down.
Pirates put their booty in it.
What is always coming but never arrives?