phizz4
Well-Known Member
This is my interpretation, for what it is worth. La Nina events have less impact on Europe than the Pacific and North America as other factors come into play. One of these is the North Atlantic Oscillation, which for us means the warming effect of the Gulf Stream/North Atlantic Drift. It brings warm water (and the air blowing across that water is also warmed) and is the reason why we and western Norway are ice free in the winter. There is evidence that this oscillation is weakening and that is why there are predictions of colder winters with more snow in GB. The models in the linked forecast suggest that the start of the winter could have more changeable weather if the Polar Vortex is weakened (which is predicted) but it may strengthen later in the winter to bring dryer conditions. A weak polar vortex allows cold air to reach us from the Arctic, but that is interspersed with mild, wet weather due to the wavy polar front. A strong polar vortex tends to keep the cold air further north. So, don't get your hopes up too soon!