Delhi Government : Cloud seeding is generally regarded as moderately successful, with research and past implementations indicating it can enhance rainfall when atmospheric conditions are favourable.
Delhi Govt Delays Cloud Seeding Trial Due to Ongoing Monsoon | Here’s What Happened
The Delhi government has deferred its anticipated cloud seeding trial, originally planned for July 4–11, because of active monsoon conditions across the region. Officials explained that persistent rain and high cloud saturation make current conditions unsuitable for executing the artificial rain experiment, which was intended to help mitigate the city’s air pollution and water shortage issues.
Pilot Project Details
The ₹3.21 crore pilot project, approved by the Delhi Cabinet in May 2025, was set to be the capital’s first cloud seeding initiative. Conducted in partnership with IIT Kanpur, the scientific operation was scheduled to use early July’s expected weather conditions to trigger rainfall by dispersing substances like silver iodide and rock salt into moisture-laden clouds.
The operation would have been carried out using aircraft taking off from Hindon Airforce Station in Ghaziabad, flying over areas such as Rohini, Bawana, Alipur, and Burari in North Delhi, along with parts of Western Uttar Pradesh, including Loni and Baghpat. The project was designed in coordination with the India Meteorological Department (IMD), Directorate General of Civil Aviation (DGCA), and other relevant agencies.
Reason for Delay
Environment Minister Manjinder Singh Sirsa said updated IMD forecasts showed cloud seeding was unlikely to be feasible before July 3. While the July 4–11 window initially appeared promising, ongoing monsoon activity has blurred the distinction between natural and artificial rainfall. “To ensure accurate outcomes and operational safety, we’ve decided to postpone the trial until monsoon activity reduces,” Sirsa explained.
Scientific Perspective and Weather Dependency
Experts from IIT Kanpur noted that nimbostratus clouds—low-level and moisture-rich—are ideal for cloud seeding. At least 50% atmospheric moisture is needed for effective seeding and microphysical transformation of clouds, with rainfall typically occurring within an hour of dispersal. However, heavy natural monsoon rains at this time would make it difficult to measure the specific impact of the seeding process.
Next Steps and Political Reaction
Sirsa added that most required clearances, including those from the Ministry of Defence, IMD, and the Central Pollution Control Board (CPCB), have already been secured. The DGCA has been asked to suggest an alternative window after the monsoon subsides. Meanwhile, political tensions have surfaced, with the AAP accusing the BJP of reviving an earlier proposal they couldn’t implement due to procedural delays.
Despite the postponement, authorities believe the project holds strong promise as an environmental tool for Delhi and will move forward once weather conditions are conducive.