Leslie R. Lemon (January 19, 1947 – May 29, 2020) was an American meteorologist bridging research and forecasting with expertise in weather radar, particularly regarding severe convective storms. Lemon was, along with Charles A. Doswell III, a seminal contributor to the modern conception of the supercell which was first identified by Keith Browning, and he developed the Lemon technique to estimate updraft strength and thunderstorm organization (in highly sheared environments) also as a continuation of Browning's work.