Nature

This is a riddle see if you can guess what I'm talking about

   

Flowing from high pressure to low
the beginnings are futile yet slow

Swooshing through the vast land
like a self- assembled invisible hand

Gathering on the continental fields
summoning the power it wields

Fondly naming it 'Bayamo' and 'Sinoom'
cannot be contained in a room

Who is this mysterious creature
that was described as the main feature?