They can. There are several down river from Niagara falls.
Whirlpools typically occur in ocean currents where opposing currents meet or in areas with strong tidal flows such as straits and narrow channels. They can also form around natural underwater obstructions or rapidly changing water depths like in rivers or near waterfalls.
Both tornadoes an whirlpools are different types of vortex. But besides that they are very different. For one thing, how tornadoes function and develop is more complex than it is for whirlpools.
Whirlpools most often occur in the late summer and early fall when the water temperature is warmer and there is strong tidal or current activity.
Whirlpools are circular water currents caused by opposing forces or eddies, typically found in oceans or rivers. Tornadoes are violent rotating columns of air extending from a thunderstorm cloud to the ground, characterized by strong winds and often causing damage. Both involve spinning motion but occur in different environments and have different causes.
Yes, they occur naturally and sometimes(if large enough) have a tendency to sink ships that enter the proximity.
The plain answer is that they end when they run out of energy. So they simply stop then. But there are all kinds of whirlpools caused by all kinds of things. Which means there are all kinds of ways whirlpools can get and lose their energies. For example, there are whirlpools in your bathroom sink when you open the drain. They stop when the water is gone from the sink and so there is no longer a force of gravity acting on water to cause the whirlpools. There are whirlpools in the wake of a ship. They're called eddies, but they are still whirlpools. They stop when the ship stops because they were getting their energies from the ship's motion. Similarly there are whirlpools in running streams and rivers, they might stop if there is a change in flow or the river runs dry. So there you are. Whirlpools stop when they run out of energy.
Kinda-sorta. Whirlpools in general are rare, and the ship-eating kind sometimes seen in movies don't occur at all.
rivers
Most of the time it is man's fault. Often, people mine under rivers. sometimes, the weight of the water causes the roof of the mine to collapse. Other times it is nature's fault. Sometimes, large amounts of pebbles shift underwater making a hole like a drain. Man-made whirlpools tend to last hours and are more powerful. Nature's ones only last a few seconds and are pretty weak.
Some famous natural whirlpools include Saltstraumen in Norway, the Corryvreckan in Scotland, and the Naruto whirlpools in Japan. These whirlpools are known for their powerful currents and swirling waters, which attract visitors and researchers interested in their natural phenomena.
ocean rivers lakes
Yes, whirlpools can occur in the Missouri River, particularly in areas with strong currents, obstacles, or changes in water flow. These natural phenomena are typically more common during high water conditions or after heavy rainfall when the river's flow is more turbulent. While they may not be as prominent as those found in larger rivers or oceans, local factors can create smaller whirlpools within the river's dynamics. Always exercise caution around fast-moving water to avoid potential hazards.