Hypothetical question that came up in World Building stack exchange. The question asked for what the longest reasonable day length would be. I thought that a 100 hour day: * Afternoons in what are now hot deserts would be uninhabitable. * Frost traps in more polar climates would be difficult. * Higher temperature swings would result in a huge (yuge?) afternoon thunderstorms. Now I started to get on thin ice. With a slower rotation, coriolis forces will be smaller. Would this make cyclonic storms larger? Would the hadley circulation change -- fewer, but larger cells. Bigger weather system that moved more slowly? Anyone point me to a good exometeorology simulator?