The science you need to know before seeing 'Twisters'

• 'Twisters' aims to be more scientifically accurate than its predecessor, 'Twister.'
• Many of the film's characters are scientists or storm chasers who know a lot about tornadoes.
• They drop meteorological terms like updraft and Fujiwhara effect, so a refresher might be helpful.

You don't need to know a lot about tornadoes to understand the massive storms you'll see on screen in the new film "Twisters," debuting in US theaters Friday.