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<br />natural precipitation potentialt including probablE~ location and mean <br /> <br />amount. Forecasting willt of courset be quite useful in planning each <br /> <br />day's activity. Even more importantt objective forecasting could be very <br /> <br />helpful in the design and conduct of the randomized seeding experiment as <br /> <br />" <br /> <br />it may provide a basis for prepartitioning of the data. This could lead to <br /> <br />much more sensitive statistical testing of seeding effectiveness. <br /> <br />7. Additional radart rawinsonde,and time-lapse calnera data will be obtained <br /> <br />for an improved climatology of cloud systems suitable for experimentationt <br /> <br />and for documentation of the corresponding atmosphE~ric conditions. This <br /> <br />information is useful for estimating the duration of the randomized seeding <br /> <br />experiment for various assumed precipitation changBs due to seeding, It <br /> <br />also aids in determining the optimum raingage densitYt and area extent and <br /> <br />location of the raingage network. Moreovert the ilnportance of the various <br /> <br />types of cloud systems for producing rainfall on southeastern Montana will <br /> <br />be documented. <br /> <br />D. Nonmeteorological Impact Investigations <br /> <br />While this operations plan covers only the meteorological portions of <br /> <br />HIPLEX, other important aspects should be noted. <br /> <br />-- ,.---- -.----- --------. ---" <br />MDNRC (the Montana Depart- <br /> <br />--ment o-f -Nat-uraf--Resources and C-onservad.()u)fs-directirig aresearcli <br /> <br />program concerned with the agriculturalt economict environmentalt hydro- <br /> <br />logict and social aspects of summer rainfall modification. Thust if HIPLEX <br /> <br />succeeds in demonstrating area-wide rainfall changE~s t the significant <br /> <br />consequences of such changes should also be understood, <br /> <br />1-8 <br />