24/07/2023
Ignore the '2012' but the image still reflects 2023s Summer so far. We are currently stuck in a pattern where the Jet Stream is further south, introducing cooler, wetter weather.
The Jet Stream is formed by the interaction of cooler and warmer air. This interaction creates a ribbon of air that steers weather systems along it. Normally this is further north and weaker as the thermal gradient in the Summer is not as strong - the air is much warmer further south and less cold further north. However, this year there's been more high pressure over the arctic region which has forced the jet stream south out of its normal position. The relentlessness of this pattern is fairly unusual, hence the endless miserable days in northern Europe and heat in the south.
There are signs it may abate in early August, but for now it's cool, wet and occasionally windy.