The Coriolis effect does not actually make water rotate in different directions while flushing toilets and draining bathtubs.

The Coriolis effect does affect large bodies of water, and can alter ocean currents and weather systems, but it's far too weak to affect draining water. The hemisphere you're in doesn't actually change the direction water drains

If the Coriolis effect makes some objects appear to change direction, why doesn't it have an impact on tornadoes or toilet water? If the Coriolis effect makes some objects appear to change direction, why doesn't it have an impact on tornadoes or toilet water?

While the premise makes sense -- that the earth's eastward spin would cause the water in a toilet bowl to spin as well -- in reality, the force and speed at which the water enters and leaves the receptacle is much too great to be influenced by something as miniscule as a single, 360-degree turn over the span of a day. When all is said and done, the Coriolis effect plays no larger role in toilet flushes and baseball games than it does in the revolution of CDs in your stereo. The things that really determine the direction in which water leaves your toilet or sink are the shape of the bowl and the angle at which the liquid initially enters that bowl.

Likewise, the New York Yankees, the Los Angeles Dodgers and other elite baseball teams can't really credit scientific phenomena for their accomplishments. Things might be different if first base was on the equator and third was at the North Pole. But in the short distance between the pitcher's mound and the batter's box, the Coriolis effect doesn't gain a whole lot of traction. Even the most intimidating closer wouldn't see much difference in the placement of his fastball as a result of the Earth's rotation than he would from a gusty wind.