Johannes Letzmann

Johannes Letzmann
Born(1885-07-19)19 July 1885
Wenden, Livonia
now Cēsis, Latvia
Died21 May 1971(1971-05-21) (aged 85)
Alma materUniversity of Tartu
University of Helsinki
Known forTornado damage analysis
Scientific career
FieldsMeteorology
InstitutionsUniversity of Tartu
University of Graz

Johannes Peter Letzmann (19 July 1885 – 21 May 1971) was an Estonian meteorologist, and a pioneering tornado researcher. His prolific output related to severe storms concepts included: developing tornado damage studies, atmospheric vortices, theoretical studies and laboratory simulations, tornado case studies, and observation programs. It generated extensive analysis techniques and insights on tornadoes at a time when there was still very little research on the subject in the United States.