A stone that understands the weather by just looking

Weather changes frequently these days, but if you have this stone it seems that weather will be known soon.

Details are from the following.

Just watching the stones hanging in front seems to understand the weather. The view is as follows.
1.Stone is wet = rain
2.Stone is dry = It is not raining
3.Shadows on the ground = sunny
Four.The top of the stone is white = snow
Five.Stone can not be seen = fog
6.Stone is shaking = strong wind
7.Stone is jumping up and down = earthquake
8.Stone is gone = Tornado

It's called "Yabo" that says "You can understand without looking at this stone!"