Why Tuesdays?

I've noticed that it is only on Tuesdays that the weather gets bad. I intended to go swimming--in fact I was even dressed. But right when I was leaving, it began to hail. And I saw a few flashes of lightning. So, I waited about 20 minutes as Anthony said it would pass quickly. When I went out again, I saw lightning again. I made it all the way to the car that time but turned around. I would have been really frustrated had I gotten to the pool and not been able to swim. I'll plan to go on Friday instead. My legs are really tired.