About whether the weather is abnormal or normal.

The phenomenon you mentioned is not too abnormal weather, because the weather is not specific and unchangeable. As you said, the reason why it snows in the south is very simple. If the cold and wet airflow is too strong and the warm and wet airflow is weak, the intersection of the two airflow will move south, and there is no way to form rainfall in the north without enough water vapor. As for the low temperature in Europe, you might say that the polar cold current is too strong, but the Atlantic warm current is not as weak as usual. The cold current from the polar regions will naturally reduce the temperature of the European continent, and because Europe belongs to a temperate maritime climate, it is rich in water vapor and will have more precipitation (including rain, snow, hail, etc.). )。 I hope my explanation is not very abstract, and I hope it will help you. If you don't understand, you can ask me if you don't mind.