It's Day 6 of poetry month. Here is one of several Canadian collections I'll feature during April. And it won't be the only concrete poem on the list, either--that is if Blogger doesn't eat all my spacing.
Thunder Bay storms
from See Saw Saskatchewan: More Playful Poems from Coast to Coast, written by Robert Heidbreder; illustrated by Scot Ritchie. Kids Can Press, 2003.
(Note: when quoting poems online, always include a full citation for the collection from which the poem originated. If the poem is not in the public domain (i.e. is still in copyright) abide by the principle of Fair Dealing in your use of the work.)