Weather Modification

Military Service Members, Veterans, and Spouses - For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty, please go to the Military Outreach home page.

News and Updates

Notice of a Vacancy on Weather Modification Advisory Committee

TDLR announces a vacancy on the Weather Modification Advisory Committee (Committee) established by Agriculture Code, Title 9, Weather and Climate, Chapter 301. The purpose of the Weather Modification Advisory Committee is to advise the Texas Commission of Licensing and Regulation (Commission) on legislation, policies, administration, research, and other matters related to the duties, powers, or function of the Texas Department of Licensing and Regulation under this chapter. This announcement is for the position of a businessman.

The Committee is composed of five members appointed by the presiding officer of the Commission, with the Commission’s approval. The members represent the following professional interests: Businessman; Engineer; Atmospheric Scientist; Attorney; and Agricultural Producer. Members serve at the will of the Commission.

Interested persons should submit an application on the Department website at Applicants can also request an application from the Department by telephone (800) 803-9202 or e-mail

Issued in Austin, Texas on October 26, 2016.

Brian Francis
Executive Director

Weather Modification - The “seeding” of clouds with artificial ice nuclei occurs in much of West and South Texas each growing season, which extends from mid-spring until early autumn. The seeding is done exclusively for rainfall enhancement using aircraft and sophisticated weather radar data. Decisions to deploy aircraft and disperse seeding materials (both silver iodide and salts) are made by skilled meteorologists licensed by TDLR specifically for weather modification. Aircraft are based at airports in locations within, or close to, the “target” areas of these projects, i.e. where the impact of seeding (more rainfall from thunderstorms) is intended.

TDLR’s weather modification program issues licenses and permits for these projects, most of which have been in operation for nearly two decades. The licenses attest to the credentials and experience of the meteorologists who direct the seeding operations, while the permits pertain to specific regions where seeding is intended and where aircraft may operate. A licensee may conduct more than one project, each of which requires a specific permit be issued before seeding can begin. The aim of regulating weather modification in Texas is to ensure that various methods of modifying the weather do not dissipate clouds nor inhibit their ability to produce rainfall to the detriment of people or property in the affected areas.

TDLR’s program also assists individuals, organizations and governmental bodies in the design of cloud-seeding operations, as well as monitoring ongoing seeding activities to ensure compliance with permits and helping to evaluate the impact of the seeding on “target” and neighborhood areas. It also administers federal grants for exploratory, and confirmatory, cloud-seeding studies and shares information on technological advances with other governmental agencies, organizations, and interested individuals.

Weather Modification Regulation

All individuals and organizations intending to conduct weather modification activities are required to obtain a weather modification license and permit from the TDLR. George Bomar (512-936-4313; is the contact person at TDLR for information on, and assistance with, the licensing and permitting of weather modification operations.

The Department relies on its staff, as well as the Weather Modification Advisory Committee, for recommendations on applications for weather modification licenses and permits. The Committee meets every few months in Austin to review applications for licenses and permits.

For more information about the weather modification program, e-mail TDLR at