The weather is going to change dramatically the upcoming week in central and mainly eastern Europe from Sunday (12/5/2019) presenting autumnal traits.
In particular, from Sunday and then, the Azores anticyclone will be gradually developed and established in western Europe with a centre over the UK. This will result in better (fair and dry) weather conditions in western Europe with hot for the season temperatures over south and west Iberia (up to 35-37°C).
This situation will push colder arctic air masses to invade north and eastern Europe. Snow will occur in north-central Scandinavia even on lower ground regions, while some snow may be observed over hills/mounts in the northern regions of central/eastern Europe (such as eastern Germany, Poland etc).
Next, the majority of eastern Europe, from Italy and further to the east, will be affected by stormy and colder than average weather with rain at times and afternoon thunderstorms mostly in central and western regions. The most severe weather, where hailstorms may occur, is expected in eastern Italy, western Balkans and possibly regions of northeastern Balkans far from the sea.
The weather will remain fair, dry and hot in Cyprus and eastern Turkey.
The weather may completely be reversed from 18/5/2019 and then with a possible heat wave in southeastern Europe and rainy weather for the western.