Why is it bad to launch a model rocket into a cloud?

Answer 1

The reason is very clear in the laws codes and regulations that keep safty for other things in the sky and in your launch zone both in the sky and on the ground.

If you cant see where it is going then you cannot say that it is safe and will not cause damage to those around you.

Flying Conditions. I will launch my model rocket only when the wind is less than 20 miles per hour. I will not launch my model rocket so it flies into clouds, near aircraft in flight, or in a manner that is hazardous to people or property.

I will launch my high power rocket only when the wind is no more than 20 miles per hour and under conditions where the rocket will not fly into clouds or when a flight might be hazardous to people, property, or flying aircraft. Prior to launch, I will verify that no aircraft appear to have flight paths over the launch site.