>The rusty mine sways
>dead on a couch of spume.
>No storm clouds now
>What's the thinking about the use of articles, 'the', 'a' >etc. in Haiku?
Ask yourself if it's necessary. In this case, I think "the" or "a" are appropriate. It aids the flow of this haiku.
>Also, I feel it would be more effective to write, 'storm >clouds have passed' but is perfective aspect a big no-no?
"storm clouds have passed" might add a temporal idea to the piece that takes people out of the moment. So be wary of that.