Why does it always snow this year?

Hehe, the weather is different all over the country. There has been a severe drought in the north this year, and there has not been a snow since the winter, while it is mainly rainy and snowy in the south. The main reason is La Nina phenomenon, that is, the temperature of ocean currents in a large area is lower than that in the same period last year. On the contrary, it is the El Ni? o phenomenon, that is, "El Ni? o", which usually means that the temperature of large-scale ocean currents is higher than that of the same period last year. If it is El Nino, there will be a warm winter. If it is La Nina, the north will be as dry as this year, and there will be freezing rain in the south.