dark clouds!

I scored the greatest piece of street art this side of the Pecos! Dark Clouds! Have you seen this artist's work before? It is all around Williamsburg on lightposts, and all around Boston, especially on the fence that divides Inbound and Outbound trains on the E line. Do you know this artist? Are you this artist? I think he went to Museum School or Mass Art. (I think Dark Clouds is a 'he.') I