Seeding Summertime Convective Clouds to Increase Black Hills Rainfall


  • A S Dennis U.S. Bureau of Reclamation Denver, CO


Data from two Reclamation-sponsored randomized cloud seeding experiments near the Black Hills of South Dakota are combined with data on size distributions of showers to estimate the potential for modifying summertime precipitation. The analysis suggests that increases amounting to roughly 12 percent of the natural precipitation are possible through a combination of microphysical and dynamic effects. Convective clouds around 6 km deep are judged to be the most promising targets for seeding to increase summer rainfall.




Scientific Papers