What do you mean, after the rain clears, the mountains disappear?

The rain stopped, so it cleared up, the dust dispersed and the mountains in the distance could be seen. In this sentence, the rain has stopped, and the rain has stopped, and the dust has disappeared. You can see the mountains in the distance. Together, it means that the rain has stopped, so the weather has cleared up and the dust has dispersed, and you can see the mountains in the distance.