Continuity mistake: In the movie the antagonist Jonas has a vehicle fleet that includes the main vehicle, a Chevy truck, 4 black Dodge Grand Caravans, and a large recreational vehicle. At 37:15, a faraway camera shot shows the Chevy and 4 black minivans in a convoy, but the RV is nowhere to be seen. In the next shot, Bill, Melissa, and Jo arrive in the Red Dodge Ram, the RV is at the back of the convoy, and there are only 3 minivans between the RV and the Chevy at the front. (00:37:15 - 00:38:15)
Other mistake: During the movie, some characters wear a headset to communicate (Rabbit, Joey, Dusty, Jo, Jonas). Nothing wrong there, but they also use the CB radio/mic in addition to using the headset. And it's not so they can hear conversations better, since Rabbit and Jonas use the mic on their headsets 99% of the time. There are also instances where you can hear conversations from some of these characters when they don't use the CB radio, so the only mic that makes sense is from the headset.
Visible crew/equipment: When Melissa dodges the truck that has fallen from sky and Dusty rushes to open a door and help Melissa get out of the truck, the reflection of a camera is seen in the bottom right corner of the truck window. As they move out and pan to the right, you can see a reflection of the same camera and cameraman at the bottom right corner of the truck door as they move away. (00:33:50)
Continuity mistake: When the cow blows by the truck, the truck is driving down an empty dirt road with water on both sides. During the shots of the occupants, the road behind the truck is paved and dry. Also in one of these rear shots a truck (Red Chevrolet Blazer) drives by in the opposite direction. (00:42:25)
Continuity mistake: When they're in the town with the drive-in movie, we see Melissa in her motel room crawling up onto the bed towards her pillow. You can see she has shoes on but no socks. We see her twirling her engagement ring around on her finger, then see her use the remote to turn the TV off. She watches the curtains blow for a minute and then she walks out of her motel room. She has on white socks. Then as she runs to grab Billy's hand, she has on black socks.
Factual error: In the begining when Jo's dad is bringing the family downstairs and say's "TV says it's big, might be an F-5" That scene was set in 1969. In reality he would not have known anything about an F-5 or any tornado with an F rating because the Fujita scale was not developed until 1971. (00:02:45)
Factual error: When they are at Aunt Meg's the first time, they get word that a tornado has been spotted and somehow they already know its rating. Tornadoes get their ratings from the amount of damage they do. This is determined after the tornado is gone.
Continuity mistake: When the telephone pole falls on the truck, you see Dorothy get thrown off the bed and the tailgate gets broken off along with it. A couple of scenes later, the tailgate is back and hanging there like it was untouched, and the pole is no longer there. (00:59:00)
Continuity mistake: When Jo's crew is having their little steak snack at Aunt Meg's, we see Preacher watching TV. There's a good shot of the top of the television set and there are NO walkie-talkies on top. Yet when they hear about another tornado, they all jumped up and grab their walkie-talkies off the top of the TV.
Continuity mistake: After Bill Paxton and Helen Hunt chase the first tornado they switch to Bill's new truck. They look at the speedometer once then they look at again about 3 seconds later and the odometer is hundreds of miles different than it was only 3 seconds before. Furthermore, the truck has gained a quarter gas tank in a blink and has the airbag warning light turned on.
Continuity mistake: In the scene where Bill is trying to catch up with Jonas, right after Bill stops the truck, we see a long shot of Jonas's storm chasing crew passing Bill's truck, a side road can be seen on the right side of the road. But when Bill puts the truck in reverse and turns onto the side road it's now on the left side (there never was a side road visible on the left side in the long shot). (00:38:35)
Plot hole: Throughout the entire movie, barns, houses, cars, 18-wheelers, etc. are demolished and lifted into the air like they were made of paper. And yet Jo and Bill pass through one tornado after another with nothing more than their hair getting messed up a little. You'd think the debris alone flying into their faces at 100 miles an hour would be enough to give them a few injuries.
Continuity mistake: When Bill and Jo are going through the house, the house is on its side horizontally. When they are crashing through the rooms though, the rooms are vertical. Also, in the same scene, you can clearly see them going up the stairs to the second floor. When they burst out, they are magically back down on the first floor. Right after that, the windshield is all cracked. A second later, it's perfectly fine. (01:34:20)
Other mistake: Although the film is set in Oklahoma (and north of Oklahoma City), the roads are marked by Texas road signs.
Visible crew/equipment: Near the beginning of the movie when Bill and Mellisa are on their way to get the divorce papers signed, you can see the reflection on the passenger side window of the helicopter and the cameraman. A few shots later when the camera angle is in front of the Dodge, you can see a brief reflection of the brake lights from the camera truck in the rear window of the Dodge. (00:07:50)
Continuity mistake: At the beginning of the movie, the first time we see Jo's and her parents' house, there are several fairly close-up shots showing the porch and yard. These scenes are clearer during the flashes of lightning. There is nothing in the yard, close to the right side of the porch (as we are looking at it) except tall grass and a few small bushes right next to the porch. When the family comes out of the house to go to the cellar, there is a good-sized, red toy tractor sitting in the yard now.