2 sentences

1. 刚才还晴空万里，谁知道一下就下起了瓢泼大雨。

   gāng​cái hái qíng​kōng​wàn​lǐ, shéi zhī​dào yī​xià jiù xià​qǐ le piáo​pō​dà​yǔ.

   It was a clear, cloudless sky just a moment ago, then all of a sudden, it started pouring rain.

   Source: Dong Chinese Dictionary

2. 等外面的瓢泼大雨彻底住了，我们就立刻开车前往机场。

   děng wài​miàn de piáo​pō​dà​yǔ chè​dǐ zhù le, wǒ​men jiù lì​kè kāi​chē qián​wǎng jī​chǎng.

   As soon as the pouring rain outside stops completely, we will drive to the airport immediately.

   Source: Dong Chinese Dictionary