A brief description of the surface weather in a certain area at a certain time.

(1) According to the graphic analysis, the air pressure of A is 1020, that of B is between101020, and that of C is between1000-1.

(2) According to the drawing of wind direction, it is not difficult to conclude that the wind direction of A is northwest wind.

(3) Before the cold front crossed the border, the temperature was high, the air pressure was low, and the weather was fine. There are often strong winds, rain, snow and cooling weather. After crossing the border, the temperature dropped, the air pressure rose and the weather turned fine.

So the answer is:

( 1) A

(2) Northwest wind (or northerly wind)?

(3) Strong wind, rain and snow? The temperature drops and the air pressure rises.