 Weiß flew more than 500 combat missions with the Henschel Hs 123 and the Messerschmitt Bf 109.Weiß was born on 25 September 1907 in Breslau—today Wrocław in Poland—at the time a Silesian Province of the Kingdom of Prussia.He joined the police force ("Polizei") of the Weimar Republic on 15 April 1926 at police school in Frankenstein in Schlesien and was promoted to "Polizei-Leutnant" in 1931.