a large probability of a La Nina event would cause a cold winter.

Before the mid-1980s, a large probability of a La Nina event would cause a cold winter. But in the context of global warming, the situation has changed, the same La Nina event, but the frequency of warm winters is increasing. Since 1986, in nearly eight La Nina events, the proportion of cold and warm winter was 50% and 50%. La Nina is only one of the factors affecting winter climate.  There are other factors to consider and there is no final conclusion. How this winter will be remains to be further monitored and analyzed.