Read the schematic diagram of wind direction and wind speed changing with time when a certain weather system passes through a certain place in the northern hemisphere (as shown in the figure), (the arrow symbols in the picture indicate wind direction; wind speed and wind level

The symbol ? in the figure indicates the wind direction. This legend indicates northerly wind. At 22 o'clock, it is when the weather system passes through. The northwest wind prevails before the weather system passes through. After the weather system passes through, the southeast wind prevails, and the wind direction changes from northwest wind. The wind is southeasterly, so it can be judged that the moving direction of the weather system is from southeast to northwest.

So choose: C.