I like the idea of impending hardship. With Noah, there's that in spades. He had to build the ark and then there was the challenge of bringing the animals together, followed by the oncoming torrent of rain. But which moment? For me, it would be the moment the first drops are felt. Maybe things weren't quite finished and now the sense of urgency begins to fill his body. Perhaps and upturned hand, catching a drop of rain, and a strong breeze moving through his hair and beard. I like the board in hand instead of a staff. It lets the viewer know that things are still in progress. This figure (Noah) is any "man" preparing for the torrent. It's a very human experience.
Good luck with it. I'll be stopping in here to eagerly check your progress.