By bne IntelliNews Europe now has filled its gas storage facilities to close to 95% of capacity, and while gas prices are still very high, they are substantially down from previous spikes. How the continent’s energy system will fare this winter, however, will depend on a number of factors – many of which are highly unpredictable. Supply side To name the biggest factor first, it will depend on how severe the winter weather proves to be, which is very hard to predict. Not only would a cold winter increase the need for heating; a low-precipitation winter would result in low hydroelectric power ge…