Professor at the McGill Atmospheric and Oceanic Sciences department in Montreal, Québec, he specialized in radar meteorology, a field where he has made important contributions.

Zawadzki was born in Warsaw, Poland on February 9, 1939, just before the outbreak of World War II.

[3] At this university, he served as the director of the J. S. Marshall Radar Observatory, where he supervised several students who published important papers.

[4] He died at age 84 on February 11, 2023, after suffering a second cerebrovascular accident (CVA).

[5] Isztar Zawadzki is the author or co-author of more than 117 articles covering a wide range of applications of weather radar data and cloud physics, including improving understanding of the formation processes and distribution of precipitation during winter and summer such as the growth of drops, icing of snowflakes, etc...[1] At the national and international level, Zawadzki was director of the Cooperative Research Center in Mesometeorology (McGill-UQAM-MSC) and senior scientist of the Canadian Meteorological Research Program (Environment and Climate Change Canada).