Chamonix, one of the magical spots in the Alps for paragliding, I took my daughter for as tandem PG flight from Brevent. .
This is the place to be summer or winter. Frequently there is lift however weak just after takeoff. A small spine is the trigger point for heat generated in the town and the mountain sides.
In the spring I’ve experienced 7m/s when the warm air from the valley at 17′ meets the snow line ! This took me to 10,000ft once. The problem was I was not dressed for those altitudes and got very cold.