Our teacher in middle school wouldn't let us watch "Twister" as our end of the year movie because Bill Paxton says "fuck" once - and it's the most muffled f-word ever in a PG-13 movie.
This was great! That opening scene starts the movie off with a bang. Well developed characters, intense action, great chemistry between Powell and Jones, good CGI, perfect soundtrack, etc. As good a movie about tornados I think you can make.
Although, you can tell how hard it must have been being consistent with the weather they were given, as often it would be sunny in one shot, and the next camera angle after would be dark grey and cloudy.