Tīngdào èhào, tā lèishuǐ pāngtuó, bàntiān shuōbuchū huà lai.
When she heard the terrible news, tears streamed down her face and for a long time she couldn't say a word.
Tips
usage
滂沱 already means 'pouring', and it usually appears in the set phrase 大雨滂沱 'rain pouring down'. For weeping, the Book of Songs gives 涕泗滂沱 'tears and snot pouring down'.
memory
Both characters carry the water radical 氵, and the sound itself, pāng-tuó, is like a downpour hitting the ground. The two are not used separately in this sense.