As a meteorologist in Charlotte, North Carolina, if I see that a tropical air mass is moving in from the Gulf of Mexico and a cold air mass is starting to move down from Canada, I would predict that the collision of these two air masses would likely result in the formation of a low-pressure system.
This type of weather pattern can often bring about stormy conditions, such as thunderstorms, heavy rain, and gusty winds, as well as a significant drop in temperatures. It's also possible that the low-pressure system may develop into a more severe weather event, such as a tropical storm or hurricane, depending on the strength and trajectory of the tropical air mass.
Therefore, my weather prediction on the evening news would likely include a warning of the potential for stormy conditions and a significant change in temperatures due to the collision of these two air masses.