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Last modified
7/28/2009 2:28:44 PM
Creation date
10/1/2006 2:16:53 PM
Metadata
Fields
Template:
Weather Modification
Contract/Permit #
#97-3
Applicant
Western Kansas Groundwater
Project Name
Kansas Weather Modification
Date
1/1/1997
Weather Modification - Doc Type
Report
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<br />l <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />) <br />I <br />I <br />I <br /> <br />multiple-celled-convective system. This starts as a cluster of <br />small, weak air-mass clouds developing over a relatively small area- <br />--typically 10 - 30 miles in diameter. If one, or more, clouds can <br />grow sufficiently to merge with another, the resulting merged cloud <br />tends to continue growing, thereby promoting further cloud mergers <br />which further increases both cloud volume and intensity. Such cloud <br />systems are capable of eventually producing precipitation over large <br />areas and persisting much longer than they normally would, <br />otherwise. Updrafts initially found within such a cluster of cells <br />are often embedded and difficult to locate, however, once such a <br />system grows to a certain size, updrafts generally organize better <br />and the cloud system becomes easier to continue seeding. <br /> <br />Most of the important research on the dynamics of the multiple- <br />celled-convective system was done years earlier in West-Central <br />Texas. By the same token, earlier radar studies from 1972 to 1974 <br />of Western Kansas c'louds found that this area was a fertile region <br />for these smaller cell clusters to develop. Comparisons of data <br />seem to suggest Western Kansas may be even better than in that Texas <br />area where the research was conducted. Several years ago scant <br />attention was paid to those weak-appearing multiple-celled cloud <br />clusters until one of them had grown much larger. If some of these <br />systems had been treated early, instead of waiting to see whether <br />they grew and became much larger, more frequent success probably <br />would have occurred. Today, however, we anticipate the development <br />of these smaller cloud clusters and realize they may have the <br />potential to become "targets of opportunity" to produce rainfall <br />over large areas. But, the attempt must be made to begin seeding <br />them as early as possible in hopes of catching the "window of <br />opportunity" for dynamic seeding effect, as discussed earlier. <br />'Spectacular results seeding such cloud systems appear to have <br />occurred on past occasions. <br /> <br />11 <br />
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