2014 65438+1October 16: due to the influence of strong cold air, the whole province began to cool down from 17. Snowfall weather process can reach 10 degrees Celsius.

Cold wave is the main disastrous weather affecting China in winter, which refers to a large-scale strong cold air activity. Specifically, the temperature drop in the middle and lower reaches of the Yangtze River and its north area exceeded 10℃ within 48 hours, and the lowest temperature was below 4℃. It can be regarded as a cold wave, accompanied by 5-7 winds on land and 6-8 winds at sea. The south of the cold wave caused a sharp drop in temperature, frost and strong wind in the passing area.

Therefore, choose: d.