MTTC 103 Elementary Practice Exam 2025 – All-in-One Guide for Comprehensive Exam Success

The high average snowfall in the Upper Peninsula of Michigan is primarily due to cold northern winds picking up moisture over Lake Superior. This region experiences a weather phenomenon known as "lake-effect snow." When cold air moves over the relatively warmer waters of Lake Superior, it picks up moisture. As this moist air travels over the colder land surface, it cools and results in significant snowfall. The interaction between the lake's water temperature and the cold air is crucial, as it enhances precipitation in the form of snow.

Other reasons, while related to weather patterns, do not account for the substantial lake-effect snowfall observed in this area. Cold air masses from the north can indeed influence temperatures but do not directly enhance snow accumulation like moisture-laden winds. Similarly, while jet stream winds can play a role in overall weather patterns, their impact on moisture pickup specifically over Lake Superior is not as direct as the mechanism involving cold winds interacting with the lake. Coniferous forests may affect local climates and temperatures but do not significantly contribute to snowfall amounts like the moisture dynamics observed over the lake.