Fear and Supplication upon seeing Dark Clouds or Wind, and Supplication upon Seeing Rain or Hail
»Narrated 'Aisha [ra]: (the wife of the Prophet - pbuh-), I never saw the Apostle of Allah (peace and blessings be upon him) laughing loudly enough to enable me to see his uvula, but he used to smile only. And whenever he saw clouds or winds, signs of deep concern would appear on his face.
I said, "O Allah's Apostle! When people see clouds they usually feel happy, hoping that it would rain, while I see that when you see clouds, one could notice signs of dissatisfaction on your face." He said, "O 'Aisha! What is the guarantee for me that there will be no punishment in it, since some people were punished with a wind? Verily, some people saw (received) the punishment, but (while seeing the cloud) they said, 'This is a cloud bringing us rain.'« (Al-Ahqaf: 24)
»Aisha, May Allah be Pleased with her, reported: I never saw Allah's Apostle (Peace and blessings upon Him) laughing to such an extent that I could see his uvula - whereas he used to smile only - and when he saw dark clouds or wind, (the signs of fear) were depicted on his face. I said: Messenger of Allah, I find people being happy when they face the dark cloud in the hope that it would bring rain, but I find that when you see that (the cloud) there is an anxiety on your face. He said: 'Aisha, I am afraid that there may be a calamity in it, for a people was afflicted with wind, when the people saw the calamity they said: "It is a cloud which would give us rain"« ([1])
»Narrated Aisha, Ummul Mu'minin: When the Prophet (Peace and blessings be upon Him) saw a cloud formation in the sky, he left work, even if he were at prayer, and then would say: "O Allah! I seek refuge in You from its evil." If it rained, he would say: "O Allah! Send a beneficial rain." «([2])
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([1]) Sahih al-Bukhari – Kitab Tafseer al-Qur'an (9284), Sahih Muslim – Kitab al-Istisqa' (998).
([2]) Sunan Abi Dawoud – Kitab al-Adab (9905), Sunan Ibn Majah – Kitab al-D'ua (9883).