The Question and Answer section for Emily Dickinson’s Collected Poems is a great resource to ask questions, find answers, and discuss the novel.
The main idea in Dickinson's poem, I Like to See It Lap the Miles, is her fascination and admiration for trains.
It waits upon the lawn;
It shows the furthest tree
Upon the furthest slope we know;
It almost speaks to me.
We see light as personified as a sprite or fairy-like being prancing about the natural landscape.
I think that Dickinson is referring to a storm as if it were some giant predator kind of bird.