Tornado Water Ride 2015 - "The award-winning extreme water slide simulates a natural storm experience, where you start your journey being catapulted from 36 feet in the air through a 110-foot tunnel before plummeting into the eye of the storm. Spin around the Tornado’s funnel in a four person raft where you will sweep up the Tornado’s wall experience weightlessness or zero gravity, splashing back and forth through the menacing, swirling water before being released into the calm shallows below. No need to chase the storm as this enormous thrill slide grabs adrenaline addicts for an extreme experience you won’t soon forget." - Wet n Wild Las Vegas website
There's also a very similar Tornado Water slide ride at Six Flags Hurricane Harbor. Another similar water slide to this is Pacific Spin water raft ride at Knott's Soak City in Buena Park next to Knott's Berry Farm.
Wild Surf at Cowabunga Bay is also very similar to Tornado water slide.
Another similar water slide is the Howling Tornado water slide at Great Wolf Lodge water park. Great Wolf Lodge is scheduled to open up in early 2016 in Garden Grove near Disneyland.
The Tornado is a water slide manufactured by ProSlide Technology" - Wikipedia