2014 65438+1October weather

Cold air at high latitudes rapidly moves south, meeting with warm and humid air from the North Atlantic, forming more fronts and cyclones, leading to snowfall and cooling (5 points).

Preparation: ① Prepare for road snow melting and ice melting; (2) The ship should take shelter from the wind, and outdoor operators such as high altitude and water should stop working. (5 points)

Test analysis:

The causes of snowstorms in the United States are related to their scale and terrain conditions; The terrain of the United States is high from east to west, with a plain in the middle. In winter, the cold air from the Arctic Ocean meets the warm and humid air from the Atlantic Ocean to form a frontal cyclone, which leads to a snowstorm.

Preparations to be made: It can be analyzed from the aspects of industry and agriculture, transportation and the safety of outdoor workers.

Test center: the causes and countermeasures of natural disasters