Kim, the movie you're thinking of is Tornado Warning. I'm kind of embarrassed to say I have it on DVD. But being a weather enthusiast and an avid b movie fan, it and many of the others mentioned here on my shelf. Aside from the silly looking tornadoes (that make jet engine noises) much of the dramatic tension is so over the top as to be just goofy. Apparently this really ragtag little band of scientists is such a threat with their predictions of doom, that the local police need to threaten deadly force?