A strong low pressure area is situated over Spain at the moment. It will slowly extend to the Alps, but will not reach us before tomorrow. With warm air from the Mediterranean moving in at the front of the system, foehn winds will pick up. We will therefore see a dry mix of sunshine and clouds with high temperatures.
A cold front will move in on Friday. Throughout the morning we will still get prolonged sunny spells, but very soon clouds will arrive and produce showers.