If you want to do this same thing here's what you have to do: Get permission from your parents, get a plastic or glass container that you can see though, heat up water between to 70 to 80 degree water so you can get an updraft that LOOKS like a cumulonimbus cloud, any higher will make bubbles which will tear the updraft apart. Any lower and updrafts will appear as strings. One your water is heated at the right tempature, pour it in the container carefully. Use mittens or gloves to avoid burns. Make a mixture of whole milk and heavy whipping cream if you want a solid cloud that you can't see through and slowly use a syringe or turkey baster to get the mixture at the bottom. Make sure to do this part carefully since it can make the water too cloudy. One the updrafts make the container cloudy there is nothing else to do, this is what is supposed to happen. If you want to make it so updrafts form as the water is heating in your bowl, make sure to get permission from your parents, use oatmilk and slowly use a syringe to get it at the bottom. Also Oatmilk will be see-through while the updrafts are growing. If You want the updrafts to form overshooting tops, fill your bowl with freshwater or tapwater, then make a mixture of saltwater in a smaller container, then very slowly pour the saltwater on top of the water in your bigger container, then wait 5 to 10 minutes for the water to sit still, after 3 minutes the saltwater should sit on the top or bottom of the bigger container while the freshwater sits on top. Once you've poured the saltwater in the bigger container with the freshwater, use a smaller container with boiling water. Be careful not to burn yourself! Use gloves or mittens to avoid getting burns. Then sit the container with the boiling water under your bigger container. Don't worry, the bigger container shouldn't wobble, but if it does, add support to it so it doesn't tip over and spill the water. After you've done that use a syringe or dropper to add the milk to the bottom of the water. It should start to slowly rise as the heated water in the smaller container heats up the water in the bigger container!
q&a: Q: how can I make a mesocyclone? A: swirl the water and add heavy whipping cream and whole milk (in the same mixture) to the center or side's of the swirling. Q: how can I get tornadoes to form in the water? A: heat the water too 80 degrees and add milk to the bottom of the water, then one the updrafts grow put ice cubes on the sides of the container to simulate cold pools. This will increase the chances of seeing a tornado underwater. Q: how can I get windshear in my container? A:use a spoon and give the water 1 or 2 swirls, the water at the bottom will move slower than the water closest to the top of the container. Q: how can I make a cold front happen? A: pour medium heated water in a container and use a tray or cup with very cold water and pour it slowly in the container with the heated water. Q: how can I make small showers underwater that don't have anvils? A: use a big container and carfully pour room temperature water in it, Then use a small container and carfully pour medium heated water in it. Put the smaller container under the bigger container and put supports under the bigger container so it won't tilt. Then use oatmilk and use a syringe to get the milk at the bottom of the water, although this won't make solid clouds that you cannot see though. Q: how can I get solid clouds that act like cumulonimbus clouds? A: use heavy whipping cream and carfully use a syringe to get it at the bottom of the water. Any other questions? Ask in the comments!