WORLD METEOROLOGICAL ORGANIZATION | EXECUTIVE COUNCIL |

Plans and guiding principles for weather modification activities.

1. Background

The number of WMO Members active in weather modification activities has steadily increased concurrently with the increase in said activities in several countries. Many of these activities are purely operational, often without a sound scientific basis. While funding for research in the field of weather modification has grown substantially in the past ten years and new results are providing more confidence in certain areas, there is still uncertainty in the quantitative effects of cloud seeding to enhance precipitation and even more so to suppress hail or mitigate severe weather. Major research programmes in this field are now ongoing in China, India, Thailand, the United Arab Emirates and the United States of America.

LINK TO REPORT RESEARCH-WEATHER-MODIFICATION