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<br />was about 5 hours, with some tendency for the shorter duration <br />episodes to occur closer together (nearer 3 hours apart). <br /> <br />Most of the episodes (54 percent) produced very light <br />amounts of precipitation (less than 0.02 inches on the average), <br />while another 32 percent of the episodes averaged 0.17 inches <br />and the remainder, which were the longest episodes, averaged <br />1.31 inches. Those that produced the least precipitation <br />were also the shortest in duration averaging 2.2 hours per <br />episode. The episodes that produced the 0.17 inch per episode <br />average had an average duration of 7.5 hours, while those <br />that produced the most precipitation also had the longest <br />duration (about 21 hours). <br /> <br />Assuming equal seedability conditions for all the episode <br />categories, in terms of seeding potential it is obvious that <br />considerably more precipitation would be produced by seeding <br />the episodes that averaged 0.17 inches or 1.31 inches than <br />by seeding those that only averaged 0.02 inches. On the other <br />hand, it may well be that the episodes that are producing <br />the least precipitation and accordingly have the shortest <br />durations, are the episodes that might be the most responsive <br />to augmentation by seeding. Those that are producing significant <br />amounts of precipitation might well be naturally efficient <br />and not respond to seeding as well or not at all. Other analyses <br />of the 1987 Arizona data set are addressing these and related <br />questions. <br /> <br />3-57 <br /> <br /> <br />" <br />-, <br />if <br />j' <br />t <br />I' <br />f' <br />i' <br />;1 <br />.f <br />j <br />,t <br />I <br />, <br />t <br />, <br />I' <br />t <br />I <br /> <br />