Storm Jar

Pour your water into your jar, again storm water is preferred for added chaotic energies. When you're pouring your water in, visualize that you're pulling the rain from the heavy clouds and putting them into the jar.
For added umph I've always added a little dish soap to my bottles so I can see the little twister swirl around and the bubbles get blown around in my water made winds. This is completely optional though!

Go outside when the conditions are right: Higher humidity, not too dry out because you really won't get what you want with dry air. Give the jar a whirl and ask for a storm. Do you work with Zeus, Thor or any other thunder god? Ask them for help bringing a little light and rumble to your rain show. It never hurts. The stronger the shake, the harder rain storm you will get. Do this a few times and when you notice the weather changing it means you channeled it. Give your jar a break for a few days and sit down to enjoy your storm.

A word of caution: It looks like a little twister and when I was young I made the mistake of playing with my storm jar during a thunderstorm I already called. Bad idea. Tornado sirens! Thankfully nothing actually touched down, that's why I never use this when a storm is already rolling in.