Other mistake: During the garage scene, we see a large neon sign get ripped off of its mounting pole and thrown into the garage. It seems obvious that the sign is no longer connected to any sort of electricity source, however, the sign stays lit as it is ripped off its pole, into the next shot when it crashes into the garage, and then it continues to flicker a bit as it lays on the ground.
Other mistake: The first time we see the NSSL; the woman's name there is Chris. Later in the movie, when we see the NSSL again, her name is Bryce. Turn the captions on so you can tell.
Visible crew/equipment: After leaving Wakita, Bill and Jo are driving through a cornfield. The cornfield merges into the main road and their truck almost runs into Jonas' fleet. As the truck enters the road, you can see a crew member poking his head up from the corn across the road. Watch above the driver's side mirror.
Factual error: In the last scenes when Bill and Jo are in the shed with the water pipes, the shed is torn apart by wind as well as flying debris at hundreds of miles per hour. I have watched the scene numerous times and there is not so much as a scratch on their faces. Even if they lived, they would have been battered and bloody from debris. Regardless if tornadoes do weird things, the debris ripped the shed apart, which is stronger than a human body.
Continuity mistake: About halfway through the film, when they all take shelter in the garage near the drive in movie, when the 'Drive In Movie' sign goes crashing through the garage wall you can clearly see a large metal chain pulling it through.
Other mistake: In the scene in the garage pit, one of the characters is hit in the forehead by a flying hubcap. He is cut clear across his forehead, but there is only a small trickle of blood oozing from the wound. I've seen many scalp lacerations and even the most minor ones will bleed like a stuck pig, where's all of that blood?
Continuity mistake: When Bill and Melissa go out to get the divorce papers from Jo, we see Bill pull his truck up with Rabbit and Allan's truck (hood up) in the background. We see it closer up when Bill asks Dusty, "Where's Jo?" But when the scene comes back to Bill and Dusty and then shows Melissa, Rabbit, Allan and the truck have disappeared. When Dusty is holding Melissa's hand and walking to sit in his chairs, Rabbit & co. are in the background again.
Other mistake: When the twister hits the drive in theater, the sirens are wailing, but nobody reacts. Only when Jo screams at the waitresses they start panicking and run. The movie is set in Oklahoma, smack in the middle of tornado alley. The people there know what the sirens mean, they sure don't need no out-of-town big-shots to tell them to get under cover.
Continuity mistake: When the telephone pole falls on the bed of Paxton's truck, the pole dents the bed. In the scene before the pole falls, there is a dent on the bed.
Other mistake: When Bill and Jo are strapped to the water pipes in the final twister scene, after the tornado passes and they are back on the ground, one of their leather straps are already broken. In this condition it never would have held itself on that pipe, let alone an average sized human being.
Factual error: We all know that when any tornado is on the ground and/or near moving towards us, things get blown around, like trees, grass, and other things. There are two things that I found that didn't look right. It's in the scene when the F-5 tornado is chasing Bill and Joe to the Barn. First the grass and cornfield are moving but not the trees. And second, when the tornado blows away the brown picket fence we see most of the pickets shoot upwards, which is impossible because they are nailed to horizontal boards. It would either take a far stronger wind than they're currently in to rip the pickets straight up, or the pickets were made out of far cheaper wood than they appear to be.
Other mistake: When the Tree gets blown under the red truck and they get stuck on it. Why don't they ever put the truck in 4WD? You can see the front differential and 4x4 markings so the truck definately HAS 4WD. That particular year of truck doesn't even require you to get out and lock the hubs.