As shown in the figure, the weather forecast chart for the Spring Festival holiday made by China Weather Network answers the question 1-3. Affected by this weather system, the following description is

As shown in the figure, the weather forecast chart for the Spring Festival holiday made by China Weather Network answers the question 1-3. Affected by this weather system, the following description is correct. Looking at the map, the weather system is a cold front, which mainly affects northwest and north China.

A, the southern and southern parts of North China are less affected, which does not meet the meaning of the question;

B, affected by the Qinba Mountain area, the Sichuan Basin is less affected, which does not meet the meaning of the question;

C, there will be a big storm in Bohai Bay area, which will affect maritime navigation, which does not meet the meaning of the question;

D in the dead of winter, there are few crops in inner Mongolia, and the loss is smaller than that in the south.

Therefore, choose: d.