Big storm next week could produce severe weather

A large coast-to-coast storm system could produce strong-to-severe thunderstorms, heavy rain and heavy snow starting on Sunday. A deep trough of low pressure will form across the western third of the United States this weekend, pulling in Arctic air and moisture from the Pacific Ocean and the Gulf of Mexico. The result? A complicated weather picture - to say the least - for many on Monday and Tuesday. As the storm system moves east, it'll run into warm, unstable air coming out of the Gulf of Mexico, setting the stage for potential severe weather. Tuesday through Thursday could all feature severe storms, starting in the ArkLaTex on Tuesday. On the cold side of the system, snow could overspread areas from Michigan to the Rockies. Places like Denver, Colorado could go from 70 degrees on Sunday to 30 degrees and snow by Monday. Stay with WeatherNation for the latest on this potent storm system.