You should be able to power snatch since you're catching the weight in a high position, mobility doesn't really come into play.
Obviously there's no hard and fast rules. Just as there's no direct translation between low bar wide stance squat, olympic back squatting and front squatting for all people. I think suffice to say you should be moving significantly over body weight if you're expecting to jump more than 30". But again, some guys will be jumping 40" and never have squatted before in their lives. Since you're not actively being recruited in pro sports, I'm going to doubt that's you.
I ask if it's for a sport because if you do an activity that involves jumping a lot like volleyball, gymnastics, some martial arts, some track events, etc. you're probably already going to have good jumping technique and may not need to spend extra time just jumping.
This link was passed around when I was back in high school. Obviously a lot of the information is outdated, but it gives you an idea of some plyos you can be doing. I got up to ~36" and I wasn't seriously squatting and hadn't started olympic lifting yet.
I think it goes to show the specificity of jumping. In the 6 years since I last did the program, my vertical has been tested on a vertec at worst at 30" and at best at 36". My squat and olympic lifting have improved a ton, yet if anything my vertical has gotten worse. The key difference being that I don't really do anything that involves jumping anymore. Obviously while strength plays a big part in jumping ability, in my case ~20% of jump height might just be practicing jumping.