What is the meaning of "Af Im Yavin Mifresei Av"?
Rashi: Will man understand what is in the spreading of clouds?!
Ibn Ezra: It is as if He gives Binah (understanding) to the clouds that are spread. Yavin is like "Haven Lehalaz Es ha'Mar'eh."
Malbim: When the air is clear, the vapors hold the fiery heat of electricity inside them. It scatters them and the clouds are not seen, for the drops are scattered. Even if man understands that the darkness and thunderous noise are latent in the vapors, even though they are not seen now [he does not see it until Hashem exposes it].
What is "Teshu'os Sukaso"?
Rashi: Teshu'os is darkness. Ibn Ezra - the matter is repeated. Sukaso is like "Yashes Choshech Sisro Sevivosav Sukaso" (He makes darkness via a covering of clouds).
