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<br />- <br /> <br />complex. Thus "dynamic" seeding emphasizes extending vertical <br />development of individual cloud cells, and the merger of individual <br />rain cells into an overall rain complex which then propagates <br />across the target area. <br /> <br />2. storm Recognition <br /> <br />In previous seasons a radar reflectivity of 40-45 dbz <br />was used as a measure of the storm intensity at which seeding con- <br />centrations should be increased to hail suppression levels. This <br />hail criteria was further refined in Muddy Road IV. The main <br />change being the addition of height criteria; namely the hail threat <br />exists when the height of the 45 dbz contour reaches 25, 000 feet msl. <br />With the addition of the computerized display of range normalized <br />radar echo data, !tbecame possi15le to ascertain this hail threshold <br />yalue conveniently and accurately. <br /> <br />E. Colorado Overflight Permit <br /> <br />In previous seasons there was concern that storms approach- <br />. ing the Western Muddy Road counties could not be effectively modified <br />unless seeding was started in Colorado prior to their crossing the <br />Kansas state boundary. Application was submitted for a permit to <br />,conduct seeding operations, along ,a space in Colorado 20 miles wide, <br />adjacent to the western Muddy Road boundary. A formal public hearing <br />was held in Lamar by the Colorado Department of Natural Resources. <br />Following the hearing a permit was issued to the WKGMD to conduct <br />rain augmentation within the requested zone. Permission to conduct <br />'hail suppression seeding along the adjoining Colorado zone was with- <br />held pending further hearings with the Colorado officials and their <br />Weather Modification Advisory Board. <br /> <br />10 <br />