Do you mean the "banding"? I think that is sunlight through the various density and thickness of the cloud structures, as well as precip. If not, then I am very, very bad at this game of "find the issue with this photo".
BTW, I like the photos. I think the effect looks cool.
I agree with Jim, Peter. If you don't see it on a clear sunny day, or under any other conditions...especially at night, then I would also guess that it is rays of sunshine.