How to draw a schematic diagram of cold and warm fronts

The cold front is the front where the cold air mass actively moves to the warm air mass. In the picture, the part of the cold air mass generally depicts the direction arrow of the cold air mass moving forward, which is opposite to the direction of the airflow arrow of the warm air mass forced to rise on the front. A small triangle is drawn in front.

The warm front is the front where the warm air mass actively moves to the cold air mass. The airflow direction arrow of the warm air mass climbing along the front is consistent with the direction of the cold air mass moving on the other side of the front. A small semicircle is drawn in front.

When the cold front passes, the pressure before the front drops sharply and the pressure after the front rises. The temperature drops; Gradient increase; Atmospheric baroclinic pressure increases; The wind direction changes clockwise; There is precipitation, even thunderstorms.

When the warm front crosses the border: it is warm and humid, the temperature rises, the air pressure drops, and the weather turns cloudy and rainy.