Weather modification, also known as cloud seeding, is designed to increase winter precipitation. A recent study by the State of Wyoming is the most ambitious and expensive ever done on cloud seeding. It concluded that, despite several caveats and uncertainties, seeding in two Wyoming mountain ranges increased snowfall by 5 percent to 15 percent and raised stream flows by 0.4 percent to 3.7 percent. The San Juan Water Conservancy District, along with numerous other local water entities, the Colorado Water Conservation Board, the Lower Basin States, and New Mexico all participate in funding southwest Colorado’s weather modification program. The Southwestern and Colorado Water Conservation Districts, and the Upper Colorado River Commission, see weather modification as an opportunity to augment flows in the Colorado River basin as part of their broader drought contingency planning. For more information on the weather modification program contact the Southwestern Water Conservation District at (970) 247-1302.