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<br />averaged seeded period at the same level. Moreover, the north-south <br />gradients have essentially disappeared. <br /> <br />The crystal habits on January 15th had a changed character in the <br />vicinity of the plume. The trend was to have a dominance of hexagonal <br />plates (using E. Holroyd's software) in. the vicinity of the plume. <br />Figure 4 graphs the four principal habits for one pass. The absence <br />of aggregates at the peak hexagonal pl.ate zone may be due to the <br />latter overwhelming the image buffer. The higher graupel count at the <br />same time could be due to the software interpreting large plates as <br />graupel. <br /> <br />The case study of January 15th represents only a preliminary finding; <br />nevertheless it is encouraging. A similar analysis of the afternoon <br />flight of January 28th revealed analogous influences of seeding. The <br />28th had sufficiently low ambient temperatures to produce dendritic <br />crystals in the seeded volume. <br /> <br />Supercooled liquid water was generally found over the ~ngtail Ridge <br />during IFR conditions, but usually at or below 0.13gm m -. There were <br />two days with LWC's up to approximately 0.3 gm m- ; the 15th and 28th. <br />A Rosemount 871CB1 icing rate meter mounted on top of the Main Ridge <br />showed a sparcity of LWC during January. Other months showed far more <br />icing events from this device. <br /> <br />In summary, the analysis to date indicates that the ground-based plume <br />reached the target area in cloud, that liquid water exists in the <br />seeded volume, though not usually in large quantities during the <br />experiment, and that the plume had dramatic microphysical influences <br />on the seeded volume. <br /> <br />31 <br />