Weather Modification — What's Really Happening?

Weather modification isn't a conspiracy theory. It's a documented, government-funded practice used across the globe. Aircraft, ground generators, and drones are deliberately altering weather patterns — and they have been doing so since the 1940s.

What Is Weather Modification?

Weather modification is the deliberate manipulation of atmospheric processes to alter weather conditions. The practice dates back to 1946, when Vincent Schaefer at General Electric discovered that dropping dry ice into a supercooled cloud chamber caused ice crystals to form on demand. His colleague Bernard Vonnegut soon identified silver iodide as an even more effective seeding agent, and the field of applied weather modification was born.

Since those early experiments, weather modification has expanded into a global industry. Today, it encompasses a range of techniques: cloud seeding to increase rainfall or snowpack, hail suppression to protect crops, fog dispersal at airports, and even experimental programs aimed at reducing hurricane intensity. Over 50 countries operate some form of weather modification program, with cloud seeding operations typically using 10 to 50 grams of silver iodide per hour of flight time. NOAA maintains an archive of US weather modification activities reported under the Weather Modification Reporting Act, and the World Meteorological Organization maintains a registry of active operations worldwide.

What was once a fringe experiment has become a routine tool of water resource management, agriculture, and national defence. The question is no longer whether weather modification is real — it is how much of it is happening, who is doing it, and what the consequences are.

Active Weather Modification Programs

Weather modification is not theoretical. These are real, funded, operational programs with public documentation:

• Texas— the state has operated cloud seeding programs since the 1970s through multiple regional authorities, including the West Texas Weather Modification Association. Operations target cumulus clouds across millions of acres of agricultural land to enhance rainfall during growing seasons.
• Wyoming— the Wyoming Weather Modification Pilot Project ran from 2005 to 2014 and demonstrated a 5–15% increase in snowpack in target areas. The state invested over $14 million in the program to augment water supplies from the Medicine Bow and Sierra Madre mountain ranges.
• Colorado, North Dakota, Idaho, Utah — all fund active cloud seeding programs, primarily aimed at increasing snowpack in mountain watersheds or enhancing rainfall for agriculture. North Dakota also operates one of the longest-running hail suppression programs in the US.
• China — Tianhe Project — China operates the world's largest weather modification program, employing over 35,000 personnel with a stated goal of influencing weather across 5.5 million square kilometres, as reported by BBC News. The Tianhe ("Sky River") project aims to divert water vapour from the Yangtze River basin to arid regions in the north using a network of ground-based chambers that burn silver iodide along the Tibetan Plateau.
• UAE — National Center of Meteorology — the UAE has invested over $20 million in rain enhancement research and conducts regular seeding flights over the Al Hajar mountains and inland desert regions. The program has funded research into advanced techniques, including electric-charge-based cloud seeding developed in collaboration with the University of Reading.

These are just the most prominent examples. Australia, India, Thailand, Russia, France, Spain, and dozens of other countries operate their own programs. Weather Modification International, based in Fargo, North Dakota, conducts operations across six continents.

Technologies Used in Weather Modification

The technology behind weather modification has evolved significantly since the days of dropping dry ice from a single aircraft. Modern programs use a combination of delivery systems:

• Ground-based generators — silver iodide is burned in acetone solutions at ground-level stations, typically positioned in mountain valleys or upwind of target areas. Natural updrafts carry the particles into cloud formations above. This is the most cost-effective delivery method and is used extensively in mountainous terrain across the western US, China, and Australia.
• Aircraft dispersal — twin-engine turboprops such as the Beechcraft King Air and Piper Cheyenne are the workhorses of aerial cloud seeding. These aircraft carry wing-mounted generators or underwing flare racks that release silver iodide, potassium iodide, or hygroscopic salts directly into targeted cloud formations. Aircraft provide the advantage of precise targeting and the ability to seed clouds that ground generators cannot reach.
• Drone delivery — an emerging technology in the field. Several countries are testing unmanned aerial vehicles (UAVs) for cloud seeding operations, particularly in environments where piloted aircraft face safety risks. China has deployed seeding drones in mountainous terrain, and research programs in the US and UAE are exploring their use for more targeted delivery of seeding agents.
• Rocket and artillery systems — used primarily in China and Russia, these systems launch canisters of silver iodide into cloud formations from the ground. China alone deploys thousands of rocket launchers and anti-aircraft guns repurposed for weather modification across agricultural regions.

Weather Modification in Texas

Texas deserves special attention because it operates one of the most extensive weather modification programs in the United States, and has done so for over five decades. The state's cloud seeding operations are managed under the authority of the Texas Department of Licensing and Regulation (TDLR), which issues permits and oversees multiple regional programs.

The West Texas Weather Modification Association (WTWMA) is one of the most prominent operators. Based in San Angelo, the WTWMA has conducted cloud seeding operations over millions of acres of West Texas rangeland and farmland since the 1970s. Their primary objective is rainfall enhancement during the spring and summer growing seasons, when convective clouds develop over the region.

Funding for Texas weather modification comes from multiple sources. The Texas Water Development Board provides grants to support operational programs, and local water districts contribute additional funding. The Texas Department of Transportation (TxDOT) has historically participated in funding weather modification research and operations as part of broader water resource management strategies for the state.

Operationally, Texas programs use aircraft equipped with silver iodide flare racks and wing-mounted generators. Pilots fly into developing cumulus clouds between 2,000 and 6,000 metres and release seeding agents at precise locations determined by meteorologists monitoring radar and atmospheric conditions in real time. ChemTracker analyzes 1,248 atmospheric data points per scoring cycle to help observers distinguish seeding-altitude aircraft from commercial jets cruising at 10,000–12,000 metres. A typical seeding season runs from April through September, with aircraft on standby whenever conditions are favourable.

What makes the Texas program notable is its scale, longevity, and the fact that it operates over populated areas with limited public awareness. Many Texans have no idea that aircraft are regularly dispersing silver iodide into clouds above their communities — a gap between operational reality and public knowledge that raises legitimate questions about transparency.

“According to ChemTracker's atmospheric analysis engine, weather modification aircraft consistently operate at altitudes and in flight patterns that differ markedly from commercial traffic — patterns that become immediately visible when overlaid with real-time ADS-B data.”

Is Weather Modification Being Used Secretly?

This is one of the most frequently asked questions in the weather modification community, and it deserves a nuanced answer. The documented programs described above are public. They publish reports, file permits, and in many cases operate under state or national regulatory frameworks. That much is verifiable.

However, several factors fuel legitimate concern about undisclosed activity:

• Reporting gaps — in the US, the Weather Modification Reporting Act of 1972 requires operators to file reports with NOAA, but compliance is inconsistent and there is no real-time public notification system. You will not receive an alert when a seeding flight takes off over your area.
• Military programs — historically, military agencies have conducted weather modification research with limited public disclosure. Operation Popeye, a US military cloud seeding campaign during the Vietnam War, was classified for years before being revealed. The existence of past covert programs naturally raises questions about current ones.
• International opacity — not all countries are transparent about the scope of their weather modification activities. China's program, for example, is massive but detailed operational data is not readily available to international observers.

ChemTracker does not make claims about covert programs. What it does is give you the tools to observe for yourself — real-time aircraft data, atmospheric conditions, and flight pattern analysis so you can draw your own conclusions based on evidence rather than speculation. For a broader look at climate intervention proposals, see our guide on geoengineering, including stratospheric aerosol injection.

Monitor Aerial Activity with ChemTracker

Understanding weather modification starts with knowing what is flying above you. ChemTrackeruses real-time ADS-B transponder data to show you every aircraft in your area — including those operating at the altitudes and in the patterns consistent with weather modification operations.

The app overlays live atmospheric data, including temperature, humidity, and pressure at flight altitude, so you can assess whether conditions support normal contrail formation or whether the activity you observe warrants closer investigation. Point your phone at the sky and see flight information overlaid in real time. Set up alerts for unusual activity patterns in your area.

Whether you are a researcher, a concerned citizen, or simply curious about the aircraft operating above your community, ChemTracker gives you the data to move from questions to answers. Learn more about the specific technique most widely used in these programs: Cloud Seeding — What It Is, How It Works & What It Looks Like.

Frequently Asked Questions