How do the polar easterlies and the jet stream work together to affect the weather in the US?

The polar easterlies are cold winds that flow from the poles toward the mid-latitudes, while the jet stream is a fast-flowing air current in the upper atmosphere that can influence weather patterns. Together, they can create significant temperature contrasts, leading to storm systems as warmer air rises over colder air. The positioning of the jet stream can steer these systems across the U.S., resulting in varied weather conditions, from intense winter storms to heatwaves. The interaction between these two air masses helps shape the overall climate and weather variability experienced in different regions of the country.