“Glory be to him whom you glorified.” He said that the thunderclap is an angel who yells at the rainclouds as a shepherd yells at his sheep/goats.
سَمِعَ صَوْتَ الرَّعْدِ قَالَ سُبْحَانَ الَّذِي سَبَّحْتَ لَهُ قَالَ إِنَّ الرَّعْدَ مَلَكٌ يَنْعِقُ بِالْغَيْثِ كَمَا يَنْعِقُ الرَّاعِي بِغَنَمِهِ