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<br />~ <br /> <br />ABSTRAcr <br /> <br />To help augment diminished water supplies, an emergency cloud seeding <br />project was conducted for Santa Barbara County by North American Weather <br />Consultants durin.g a portion of the 1977-78 winter storm season. <br /> <br />Initial plans called for both aerial and ground based seeding tech- <br />niques but the nature of the storms and the condition of the watershed <br />ul timately dictated that only the ground based seeding mode lvas used. <br />The area affected by this seeding mode was limited to the higher yield <br />portions of the watershed in the northeastern part of Santa Barbara County <br />and those counties immediately adjacent. <br /> <br />Nine storm periods between January 4 and February 9 were seeded <br />from the groWld based site at Figueroa l'1ountain Guard Station using <br />silver iodide flares. <br /> <br />A statistical evaluation of total storm precipitation during the <br />seeded period indicates thc1.t approximately 40 percent more precipitation <br />fell in the target area than would be expected when compared to the <br />amount that was observed in a nearby control area. This amounts to an <br />average of 2.6 inches of extra water over the entire target and an <br />average of 3.5 inches due to seeding over the higher yield portion of <br />Santa Barbara County. <br /> <br />1 <br />