This thread reminds me of when I was a pilot based at Houston Hobby, back in the 80s, when a hurricane was approaching the coast and expected to hit houston in ~ an hour. I was standing outside of the FBO, when a friend ran by, heading for his King Air, and asked if I wasn't leaving. To my surprise, I said "why? it's not coming here." Half of me believed that, but the other half was as shocked as he was.
Nevertheless, I stayed behind, and from that moment the hurricane began a counter-clockwise circle and headed for Louisiana. By the time that I got home ~ an hour later, it had made landfall and tore a path across that area. Needless to say, my friend never quite looked at me the same after that.
On the other hand, my father's grand mother was terrified of tornadoes, and was the primary reason that they moved from Stigler, Oklahoma to Mesa, Arizona back in the 30s... tornadoes were almost unknown in that area. I'm not exactly sure when, but a few years later, my grand parents house, in which my great grand mother lived, was struck by a tornado and demolished. She was killed, and everything she owned was destroyed. My grand mother survived, due to being covered by a door, and most of what she and my grand father owned was not destroyed.
The moral of these stories is that what we believe does have an effect on the world around us...even the weather.