When a large explosion occurs downtown during the height of the hurricane, the resulting smoke only moves lazily upward, despite the very high winds that blew a man sideways while holding onto a cell tower seconds earlier.
Everything is very dry during the chase scene in the eye of the hurricane.
When the guys chase the semi trucks in their tow truck, the towing fork rotates 90 degrees as they take a sharp turn. In the next scene it is upright again.
A hurricane's eye wall does not have the power to carry away semi trucks like a tornado, as depicted in the film.
Characters try to pull down a roof-mounted telecommunications microwave tower, to stop the connection to the satellite. All of the dishes point horizontally, to the next relay in the chain, and they need to be within 1 degree of each other. When the mast is pulled away from vertical, the data still flows until it falls into the street below.
At one point Will talks about using a 'pressure differential', and shows a barometric readout falling at 2-3 mb per second, past 740 mb. The lowest non-tornado atmospheric pressure ever recorded was 870 mb, on October 12, 1979, during Typhoon Tip.
The storm surge that floods New Hope capsizes a large cargo ship. The storm surge was taller than the ship itself. No hurricane has the power to create a storm surge that high and that powerful so close to land.
The sheriff works out of the Gulfport Police Department instead of the sheriff's department. The head of a police department is the chief of police, and is addressed as "chief."
The hurricane is so severe it throws cars down the street. Yet people walk with relative ease in the same winds.
The Dominator has no brake lights, which means it's not road legal.
In the final chase with the trucks, leaves are at rest on the road surface even though a massive hurricane is roaring very close by.
When Breeze is brought in to fix the backup generator, the machine is spelled "gererator".
The Dominator isn't strong enough to pull down the radio tower, but the winch is.
The film shows mountains near the Alabama coast, which is very flat. Alabama's hills and mountains are in the northern part of the state.
The final chase includes European road signs and markings.
The opening scene says "Gulfport, Alabama, 1992." Gulfport, Alabama doesn't exist, but Gulfport, Mississippi and Gulf Shores, Alabama do.
6 lane highways in Alabama have dividers down the middle.
It took 3 trucks to get 300 million dollars to the shredding facility. The same amount was also already at the same facility. Yet it takes only 3 trucks again to move the whole 600 million in the heist. Also, the 3 trucks are apparently loaded in mere minutes.
It is never explained what happened to the crooked cops. The thieves leave with all the money. Presumably the cops were locked up with the soldiers, or taken out. But after the thieves strike a deal with them, they are never seen or mentioned again.
How could they plan for the eye to pass over their town! How could they plan for the eye to follow a 6 lane highway! Or any straight line out of town.
Casey refers to herself as a Treasury agent in most scenes, but in one scene, she says she's with the ATF. They are two different agencies.
When Casey drives the cash trucks through the farmer's field to get around the traffic jam, Perkins worries they are going to ruin someone's tobacco crop. Tobacco hasn't been grown in Alabama since 2007.