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<br />During the entire experimental periad, regular rawinsande saundings will be <br />recarded, in additian to' telemetered and recarded precipitatian and ather <br />metearalagical data. After the seeding aperatian, the aircraft will be used <br />to' gather data describing physical parameters assaciated with the starms, <br />including ice crystal sizes and cancentratians, liquid water cantents, tempera- <br />tures and definitian af the seeding plume. <br /> <br />2.6 <br /> <br />Suspensian Criteria <br /> <br />A set af criteria far temparary suspensian af the claud seeding <br />pragram was develaped, based an passibly hazardaus weather and snawpack <br />canditians, and On need af snowpack augmentatian. The seeding pragram will <br />be tempararily suspended far reasans af <br /> <br />. Flaad Canditians - Encraachment af reservair valume <br />allacated to' flaad cantral starage exceeds 25 percent af tatal, with pas sible <br />need af high autflaw. <br /> <br />. Snawpack Canditians - Snawpack will nat allaw additianal <br />snawfall to' be stably an surface, resulting in passible avalanche hazard. <br />This canditian will be evaluated with the caaperatian af the U. S. Farest <br />Service Pacific Sautherwest Experimental Statian. <br /> <br />o Tatal Precipitatian - Average snawpack level in the <br />American River Basin is 1. 8 times the 20-year average snawpack, after twO' <br />manths intO' the pragram year, ar befare ane manth priar to' the end af the <br />pragram year. This defines a "wet" year where additianal augmentatian is <br />nat useful. <br /> <br />. Severe Starm Occurrence - Farecast ar abservatian af <br />severe starms (as defined by radar reflectivities af individual cells greater <br />than 45 dBZ) within praject area, suggests strang passibility af hail accurrence. <br />Hail will nat be cansidered within this pragram. <br /> <br />The third canditian will result in cessatian af aperatians far the <br />entire year, since there wauld be nO' need far augmented snowpack. Under the <br />other conditians, pragram aperatians will be suspended until the canditians are <br />nO' langer present. <br /> <br />5 <br />