Map: Jet Stream and High Pressure Developments, July 2018

The Guardian via Accuweather

The jet stream – the west-to-east winds that play a big role in determining weather in the midlatitudes – has been further north than usual for about two months.

The jet stream’s northerly position may have been influenced by temperatures in the north of the Atlantic, which have been relatively warm in the subtropics and colder south of Greenland.