The forecast from UBIMET this morning is for a difficult flying day, with storms developing in Switzerland by lunchtime. It reads: "Residual clouds between Säntis and Chiemgau/Achental will clear quickly and during forenoon we expect mostly sunny conditions. In western Switzerland and at TP 7 instead we are observing cloudy conditions and we expect just some brief sunny spells during the next hours and first local rain showers around noon.
"Thunderstorm activity in western and central Switzerland will start already between approx. 13:00 and 14:00 local time and during the afternoon the thunderstorm activity will spread further north-east and will affect nearly the whole area between TP7 and TP5. Finally in the late afternoon and evening we expect partly overcast and temporarily rainy conditions between TP7 and Vorarlberg."