Jan 15, 2022 - 12:53 AM
in reply to svusa
For 60 years I have been travelling in or near the Alps because my late Father's relatives worked at UN/WHO in Geneva so our family has has a base near Geneva for 73 years. Most of the trips have been in the traditional European holiday periods ie Christmas (hence I have skied since childhood), Easter and main European Summer holidays - ie July - August.
There are roughly speaking two or three types of general weather pattern in the Alpine 'lands' in high summer , as follows:
a) stable high pressure giving consistent sunny conditions for several consecutive days or longer. In these conditions it will be hot at lower altitudes and 'refreshingly cooler' at higher altitudes
b) semi-stable 'highish' pressure giving sunny conditions but with occasional cloud build up over high mountains due to convection
c) less stable conditions with hotter humid air - when this happens storm clouds gradually build during the day and the day can end in 'tropical' style with thunderstorms, but with a return to dry conditions the next morning. Under this weather pattern holiday activities are usually possible for most of the day but with the knowledge that the weather may break down in the mid to late afternoon.
d) occasional wet weather systems. Usually a wet weather system will come from the Atlantic and produce bad weather in the Alps, but these 'perturbations' (as the French meteorologists call them) usually last just 1 or 2 days