What's the next sentence in "Swim towards the Purple Cloud"?

Thunderstorm came in the afternoon. There was a broken Ziyun in the morning, and the next sentence was a thunderstorm in the afternoon. This is a weather proverb. It means that when cotton-wool cumulus clouds appear in the morning, it often indicates that there will be a thunderstorm. Weather proverbs include: the clouds are low and rainy, and the clouds are high and clear; Dark clouds rise at sunset and rain sounds at midnight; Clouds from the northeast will have wind and rain.