Calculater I'm pretty sure
10.3225806452 is the corect answer
So hhmm notice the picture below
thus, the vertex of any parabola is

so, it reaches its maximum point at

and the ball's' maximum height is
I think it's 34.5 (I need more letters so I'm typing this)
Answer:
at 12 hours, it's 9 inches.
at 14 hours, it's 14 inches.
at 13 hours it's 16 inches.
I'm not sure if you needed how many inches it snowed an hour, or if you just needed the hours and inches. My apologies.