Twister

TV weatherman Bill Harding is trying to get his tornado-hunter wife, Jo, to sign divorce papers so he can marry his girlfriend Melissa. But Mother Nature, in the form of a series of intense storms sweeping across Oklahoma, has other plans. Soon the three have joined the team of stormchasers as they attempt to insert a revolutionary measuring device into the very heart of several extremely violent tornados. Written by Martin H. Booda {booda@datasync.com}

When Bill goes to have Jo sign the divorce papers so he can marry his new girl, Melissa, Jo finds a collection of record breaking tornados and Bill follows along, soon his duties shift from divorcing Jo to helping her with record breaking technology to create a better warning system. Written by Joe Kibler {Jkibler01@earthlink.net}

source:

http://www.imdb.com/title/tt0117998/plotsummary