28 cm (11 inches) of snow in the past 48 hours.
This skiing site’s most recent snow report indicates that 10cm of fresh snow fell on Chamonix on Saturday 22nd July 2017.
The weather forecast on French TV Saturday morning called for snow above 2000 metres in the Alps.
Fresh Snow was reported by 2 French Ski Resorts, including Chamonix and Vars.
Snow Reports and Snow Forecasts for France covering the period from Monday 24th July 2017 show 28 cm of snow fell in Chamonix and 27 cm in Argentière in the past 48 hours.
Thanks to Ben Vorlich for this link