STATE WATER SURVEY DIVISION |  WILLIAM C. ACKERMANN, D.Sc, Chief  |  URBANA 1976

After 10 years of various kinds of specialized hail research projects (1957-1966), the Illinois State Water Survey began in 1967 a research program aimed partially at developing a de­sign for a hail suppression experiment in Illinois.  Such an experiment in Illinois was con­sidered to have viable prospects within a national framework…