two scientific miracles puzzled me?

[God of Mr. Hanky]

hi everyone, 
muslims claim that there are many scientific miracles in the quran, i found that the most of them are false, but there are two miracles that i didn't found any proof that they are false:
the first is the the aya 48 of the surat 30 that said:
"It is Allah who sends the winds, and they raise the clouds."
the scientist of meteorology until 19th century didn't know that the winds have a role in the raising of clouds, so how mohamed before 1400 years knew that?


the second, mohamed said that: 
"rainfall in one year is no less (in amount) than that falling in another year, it is only allah distributes the rain"
the science proved in our days that 505000 cubic kilometres of water falls as precipitation each year.
how mohamed before 1400 years knew that ?

thank you and i'm sorry if my english is not good.

Maybe you're aware that the Middle East inherited much of the wealth of the fallen Roman Empire, before this itself was destroyed by invasions of barbarian hordes and religious fundamentalism? Well, that's what happened. Mohammad, for all his dickish traits, was well-travelled and educated before he presented his book to his home regioin, and the Arabs there weren't really stupid either. Before the collapse of the Byzantine Empire, which was soon followed by fundamentalism and Crusades, Muslims studied with people of other religious and non-religious persuasions in Alexandria, where the largest scientific library in the world existed. Too bad that one got destroyed, and with all the knowledge it contained! When that happened, the world got quite a bit dumber for a long, long time.