Wyoming Cloud Seeding Activities

May 2021 | Wyoming Water Development Office | Link To _HB0044

“The Wyoming Water Development Office (WWDO) became interested in cold season cloud seeding (a form of weather modification) in the early 2000’s. The Office spent more than ten years conducting extensive research on the science and effectiveness of the technology to help determine whether seeding over certain parts of the state would be a valuable and affordable investment…”

Other Cloud Seeding Operations: Colorado, Idaho, North Dakota, Utah, Nevada

Link To Document_Wyoming_Cloud Seeding_WxMod_Fact-Sheet_2021

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Silver Iodide: Toxic, Environmental Hazard_Link to PubChem

“The major hazards encountered in the use and handling of silver iodide stem from its toxicologic properties. Toxic by all routes (ie, inhalation, ingestion, and dermal contact), exposure to this odorless, light yellow, crystalline substance may occur from its use in seeding clouds for rain-making…”

“Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]”

“Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]”

“Silver iodide may form explosive compounds”

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Link To _Wyoming Cloud Seeding_HB0044