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<br />CONTENTS <br /> <br />1. Introduction, summary, and conclusions ............................ 1 <br /> <br />.., <br /> <br />2. Project Operations ........................................... <br /> <br />2.1. Seeding operations ....................................... <br /> <br />2.2. Seeding materials ........................................ <br /> <br />3 <br />5 <br />7 <br /> <br />3. Statistical analysis of rainfall data ................................. 8 <br /> <br />3.1. Climatology ............................................ 8 <br /> <br />3.2. Organization of the data .................................... 13 <br />3.2.1. National Weather Service Cooperative Observer <br /> <br />Network data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 <br />3.2.2. Gridded data ....................................., 13 <br />3.3. Target-control comparisons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 <br /> <br />3.4. Large-area study ......................................... 19 <br /> <br />3.4.1. May-August season .................................. 19 <br />3.4.2. Monthly patterns .................................... 21 <br /> <br />3.5. Discussion ............................................. 21 <br /> <br />4. Evaluation of effects of seeding upon hail losses ....................... 25 <br /> <br />4.1. Organization of data ....................................... 25 <br />4.2. Relationship of hail severity to elevation . . . . . . . . . . . . . . . . . . . . . . . . .. 26 <br />4.3. Comparison of losses in the target area during seed and <br /> <br />no-seed years .......................................... 28 <br />4.4. Examination of radar records .............................,.., 31 <br />4.5. Attempts to use control areas ...............................,. 31 <br />4.6. Calculation of hail/rain ratios ................................. 33 <br /> <br />6. References <br /> <br />. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> <br />35 <br />35 <br /> <br />5. Discussion <br /> <br />. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> <br />Appendix 1. Target-area stations (southwest Kansas) with at least an <br />l8-year record of precipitation between 1948 and 1974 ................." 37 <br /> <br />Appendix 2. Stations west of 1010W with coefficients of correlation <br />with the 14 target-area stations of 0.67 or greater ....................... 38 <br /> <br />.. <br /> <br />.. <br />