Final answer:
The jet stream is causing warm fronts to move from south to north, influencing the weather conditions depicted on the map.
Step-by-step explanation:
The jet stream is influencing the weather conditions depicted on the map by causing warm fronts to move from south to north. The jet stream is a strong, high-altitude wind current that flows from west to east. It separates cold air masses from warm air masses and affects the movement and intensity of weather systems. In this case, the jet stream is pushing warm air from the south towards the north, resulting in the depicted weather conditions on the map.