Main weather systems causing temperature changes in the central plains of the United States

In summer, it is mainly affected by the warm and humid airflow from the Gulf of Mexico, and in winter it is mainly affected by the cold airflow from the Arctic Ocean.

Influence of North American Topography on Climate

Topographic features: high mountains in the west, low mountains and plateaus in the east, and vast and flat plains in the middle.

Impact on climate: the mountains on the west side blocked the infiltration of water vapor in the Pacific Ocean, causing more precipitation in the mountains on the west side and a sharp drop in the inland; The low plateau and mountains on the east side have relatively little blocking effect on the water vapor from the Atlantic Ocean, and the precipitation decreases from the coast to the inland; The Central Plains runs through the north and south, so that the cold air from the Arctic Ocean in winter and the warm and humid air from the Gulf of Mexico in summer can drive straight in, making the annual temperature difference larger.