Santa Barbara pyrotechnic cloud seeding test results 1967- 70

Abstract

Results obtained during three winter seasons (1967 to 68, 1968 to 69 and 1969 to 70) of testing the effectiveness of ground- based seeding with pyrotechnic devices for producing precipitation increases over a mountainous watershed. The seeding device used in the mode employed was highly effective in increasing precipitation downwind from the seeding site. The purposeful seeding of convection bands can be done when there is available suitable upwind information.