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<br />- <br /> <br />e <br /> <br />e <br /> <br />, <br /> <br />potential for flooding a constant concern to the SCPP staff. In <br />general, all procedures were handled well, and no dubious activity by <br />the SCPP occurred during suspended periods. Several changes were <br />made in the criteria on rain-induced winter flooding to deal more <br />realistically with forecasts of large precipitation amounts. The <br />altered procedures seemed to work smoothly over the course of the <br />season. <br /> <br />In previous seasons, the CVO (Central Valley Operations) Mid-Pacific <br />Region, Bureau of Reclamation, reduced major water releases from Folsom <br />Reservoir as the critical 25 percent encroachment level was approached <br />asynoptica11y from above. This factor made it difficult for the SCPP to <br />resume seeding operations soon after their suspension due to rain-induced <br />winter floods. <br /> <br />The major objective of the SCPP during the 1980-81 year was to examine <br />in more detail the large quantity of data collected during the previous <br />4 years of field study. <br /> <br />Contradictory evidence had been present1ed until 1980-81 concerning the <br />location and quantity of liquid- water. Therefore, the main objective of <br />the limited field season was to develop a climatology of supercooled liquid <br />water in the storm systems. Three data collection systems were used to <br />provide this information. They included ground microphysics observations <br />from a fixed site and a mobile system, ,a Rosemount icing rate meter and <br />Bendix wind system atop Squaw Peak [2740 m (9000 ft) m.s.1.], and a <br />scanning dua1-~hanne1 radiometer provided by NOAA. The results drawn from <br />this field season are as follows: <br /> <br />1-13 <br />