The North American Interstate Weather Modification Council (NAIWMC) is a non-profit, tax-exempt organization comprised of regulatory agencies, sponsoring organizations, and research institutions involved in atmospheric water resource management technology, commonly known as weather modification or cloud seeding. The NAIWMC exists to facilitate the free exchange of information regarding cloud seeding research and operations in North America.

The next meeting of the NAIWMC will be held on April 17, 2007 at the Sheraton Hotel at Fisherman's Wharf in San Francisco, CA. More information will be posted as details are finalized.