Atmospheric water resources management program. Bridger range cloud seeding experiment

Winter cloud seeding experiments conducted in the Bridger Range of southwestern Montana, and the analysis of a three winter randomized seeding experiment are discussed. Also considered is airborne plume tracing of silver iodide over and downwind of the Bridger Range, confirming earlier work indicating that targeting was usually successful with westerly flow. Several studies discussed support the statistical analysis of the randomized cloud seeding experiment. These include a stepwise multiple regression analysis relating nonseeded precipitation to upper air parameters. Cloud thickness was most closely related to snowfall of the parameters considered in this analysis.