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<br />if a method can be developed to eliminate the effect of hydro meteor fall speeds on the vertical <br />wind component calculation. <br /> <br />The LOREP was intended to be a 5-year project. It was suspended after 3 years in part <br />because of the limited periods in which lee waves did not have a detrimental effect on particle <br />growth and trajectories. This problem was compounded by the fact that two of the three <br />project years were drought years limiting seeding periods; the other year had record snowfall, <br />which required suspension of seeding operations. This situation severely restricted the <br />number of randomized cases available for statistical analysis. <br /> <br />Results from the 3-year LOREP indicate that a redesign of the project is necessary. Detailed <br />tracer studies from ne"," potential propane dispenser sites, farther south through west of the <br />previous locations, should be completed prior to resuming randomized seeding experiments. <br />In addition, higher propane release rates may be appropriate for the slightly supercooled <br />temperatures (above -5 OC) that are common at the propane dispenser locations. Propane <br />seeding can increase snowfall at such temperatures when excess supercooled 'water is <br />available. The questions yet to be answered are: what propane release rate is required to <br />produce significant snowfall, is such a release rate economical, and can dispenser sites be <br />located that will allow upward transport of ice crystals and adequate time for particle growth <br />and fallout in the target area? The potential importance of being able to seed slightly <br />supercooled clouds, which are found in abundance during the winter in northern California, <br />is too great to ignore these questions. <br /> <br />Xll <br />