i wish i have read the comment on imdb before i saw this movie . the first 1 hour be ok and though it do make me wonder why everything be center at chicago and why no one report any weather anomaly from outside u . isolated act of nature ( of this magnitude ) be unthinkable . but beyond the first 60 minute and the movie just drags on like a never end story . the screenplay be horrible . a for the actor and very poor choice . only the people hire to run in panic stick to their role . but i do have to agree that this movie have get some good pecial effect . if you rent it on a dvd and would want to watch the movie and despite the review and then play it on maximum speed your player would allow .