Important episodes of rain and hail were observed in the Alpes-Maritimes during the day on Tuesday 9 March, then in the Var and the coast in the late afternoon.

Biot  Région Provence-Alpes-Côte d'Azur France (43.63 N, 7.10 E) < 5 km
09-03-2021  (Tuesday) 13:05 UTC (+/- 15 min.)
Hailsize: maximum hail diameter: 3.5 cm Impacts: Crops/farmland damaged
Based on Information: based on information from: a newspaper report, photo or video of the event, a report on a website Big hailstorm in Biot area, beginning floods. In Les Soullières way, hail layer at least 2-3 cm (see comments).
Source: https://www.ouest-france.fr/provence-alpes-cote-dazur/alpes-maritimes/alpes-maritimes-un-impressionnant-orage-de-grele-s-est-abattu-dans-la-zone-7181494
Reference: Météo Côte d'Azur - En Direct (on Facebook), 09 March 2021. report status: report confirmed by reliable source (QC1) contact: Nicolas Baluteau (Voluntary Observer Person)