An account in Haute-Savoie, France

On May 1, 2010 at 5:00 PM, several people observe from an apartment the presence of a black dot in the sky. First stationary, the dot moves without any noise being heard. The black dot is filmed by one of the witnesses. The testimony clearly suggests a "lighter than air" object following more or less the local wind (appeared in the West, disappeared toward the South). Note that the wind pattern that day seems disturbed and complex: north wind in Lyon, no wind in Grenoble, west wind in Geneva. The precise wind direction in Sallanches could not be established. A local association doing hot air balloon flights was consulted: no flight at that time. It could be a helium balloon launched, or lost, by a private individual, or even an experimental airship. GEIPAN did not see any green reflections on the object in the video. This case, ultimately not very strange, is classified "B": probable observation of a balloon (balloon not identified by GEIPAN).