North American Interstate Weather Modification Council

All graphics courtesy of the North Dakota Atmospheric Resource Board

Winter orographic seeding

Winter seeding techniques from ground-based generators and in-cloud with aircraft

Cloud Seeding Conceptual Model

Foundation concepts for seeding summer thunderstorms

Airborne seeding techniques

Summer cloud seeding in the updraft at cloud base and via direct-injection seeding near cloud top

Watch dry ice fragments convert supercooled droplets to ice crystals in just seconds.

Seeding Methods