Here's what www.netflix.com says:
TornadoNature Unleashed: Tornado(2004)
Years after his brother is killed in a tornado, Josh feels compelled to capture the violent storms on film. He teams up with Nickie, a reporter researching new meteorological technologies, and the pair set out to get the story of a lifetime. But Nickie's also investigating another dangerous story, and Josh ends up running for his life from vengeful terrorists and a killer tornado. Daniel Bernhardt, Allister Bain and Larry Day star.
First off, the boy calls the guy at the beginning dad. So I don't get why they say brother? The movie was kinda boring, not very gripping or exciting. It was just ok.