North American Weather Modification Council
Mission Statement
The mission of the North American Weather Modification Council (NAWMC) is to advance the proper use of weather modification technologies through education, promotion and research. The Council serves as a forum for the exchange of information on weather modification issues; to promote the effective use of these technologies to enhance precipitation, suppress damaging hail, and mitigate fog; and to advance research and development activities to increase scientific knowledge about weather modification capabilities.
Statement Regarding the Recent Flood Event in West Central Texas and the Texas Hill Country
Please take a moment to read the NAWMC’s Statement on The Recent Flood Event in West Central Texas and Texas Hill Country (July 9, 2025)
Cloud Seeding Workshop Videos
Cloud Seeding as a Water Management Tool: This workshop was held for resource managers, organizational leadership, policymakers, and stakeholders who participate in cloud seeding activities, or were interested in learning about cloud seeding as a potential tool to support water management or mitigation efforts. Click here for a playlist of the seminar recordings. You can access presentation slides from the workshop here. You can access speaker biographies here.
What is Weather Modification?
Weather modification (also known as cloud seeding) is an environmentally friendly way to generate more precipitation from clouds in the form of rain or snow. It works through the introduction of tiny particles (“seeds”) that create additional droplets or ice, thereby accelerating the precipitation process and improving the cloud’s efficiency. Cloud seeding is also used to reduce hail damage and eliminate fog. This well-established technology has been in use since the 1940s in dozens of countries around the world.
Learn About Cloud Seeding
The NAWMC has developed three brochures on the basics of cloud seeding. The brochures cover the science of cold season and warm season operations and its relation to the climate and environment.
Cold Season Cloud Seeding (1 mb) – Covers winter cloud seeding primarily for snowpack enhancement. Some cold season programs near coastal areas are conducted for rain enhancement.
Warm Season Cloud Seeding (1 mb) – Covers summer cloud seeding primarily for rain enhancement and hail suppression.
Environment and Climate (2 mb) – Explains the role of cloud seeding in the climate system and its effect on the environment.
Nature Editorial Calls for Weather Modification Research
Renowned journal Nature published an editorial calling for a renewed effort in weather modification research. Click here to view.
North American Weather Modification Council 