雨(う)天(てん)中(ちゅう)止(し) utenchuushiになり ninariそうな souna計(けい)画(かく) keikakuだ daな na。 Looks like a plan that'll get rained out. Literal Rain-cancellation become-likely plan [copula-だな]. 雨天中止 'cancelled in case of rain' — a set compound seen on event announcements. になりそう 'looks like it will become' — ~そう for likelihood based on appearance. だな is masculine reflective. Dry humor — the plan is already doomed. weathereveryday conversation~そう (looks like)sentence-final な (reflective)
雨(う)天(てん)中(ちゅう)止(し) utenchuushiになり ninariそうな souna計(けい)画(かく) keikakuだ daな na。 Looks like a plan that'll get rained out. Literal Rain-cancellation become-likely plan [copula-だな]. 雨天中止 'cancelled in case of rain' — a set compound seen on event announcements. になりそう 'looks like it will become' — ~そう for likelihood based on appearance. だな is masculine reflective. Dry humor — the plan is already doomed. weathereveryday conversation~そう (looks like)sentence-final な (reflective)