Every storm brings with it hope
=Every storm brings hope with it 每一场暴风雨都会有希望伴随它而来
it指代 Every storm,with it 伴随着每一场暴风雨,
that somehow by morning, everything will be made clean again 是hope的定语从句
（什么样的希望呢?）不管怎样,到拂晓时,一切又恢复平静的希望.