[@CollectorOfMyst] looks like a great start! 

As for minor effects like speeding up the boat with wind, rain clouds, you could probably sense pressure changes in the air to tell when a storm is coming, (we could probably bullshit some navigation abilities in there via sensing air currents, so he can take the navigator role on the ship!) and all of these would count as basic Effects. So you have that organized correctly!

Summoning a whole ass storm is going to be such a strategic choice I can't wait to see when we pull the trigger on that one lol

Edit: for balancing sake. The storm conjuring spell I'm seeing right now as an ultimate attack. So work backwards from there.