When Gale arrives in town, she is wearing blue jeans and a white tank top. She then immediately chases after a tornado, with Denise, and is seen standing outside the car in the same clothes. When we next see her,confronting the Government Officials, she is wearing black pants and an orange tank top, despite having no time or opportunity to change clothes.
Denise's top changes from pink to black and her pants from grey to blue during the same time frame that Gail's clothes change.
Kari Wuhrer's microphone transmitter can be seen bulging in the middle of her back under the waistcoat all the way through the film.
When the tornado hits Chicago, it hits US Cellular Field on the southside, but the Wrigley Field scoreboard gets pulled up by the tornado. Wrigley is 8 miles to the north.