Originally posted by TheQuixote:

Think the atmosphere, as much as it's annoying, is really a strong point of this game.

The problem I have with it is it seems much more likely to trigger in an artificial manner when you're exploring new areas.

I agree. The fog and such drastically adds to both the atmosphere and immersion in general.

As for artificially happening.. I'm not sure; maybe.

@OP: wait until you get to the Mountains.. snowstorms are much more frequent than fog. :)