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<br />IV. OPERATIONAL SUMMARY - 1997 <br /> <br />Table 1 summarizes 1997 WKWMP operational flight and seeding <br />information plus all days upon which crop-hail insurance claims were <br />reported. Each flight day was broken down into whether the day was: <br /> <br />R.~.to increase Rain only <br /> <br />H...to reduce Hail only <br /> <br />C...Combined, to increase rain and reduce hail, both <br /> <br />O...Qbservation---cloud examination, no seeding performed <br /> <br />Other pertinent information relating to operations are to be <br />found in the back of this report in the following appendices: <br /> <br />(1) Appendix A - Historic Project Operational Activity Summary <br />(seeding and observation flights) <br /> <br />(2) Appendix B - Historic Monthly Number of seeding Days for <br />Hail and/or Rain Augmentation <br /> <br />(3) Appendix C - Historic County Weather Modification <br />Participation <br /> <br />(4,) Appendix D - NOAA Form 17 - 4A, Final Report on 1997 <br />monthly seeding activities <br /> <br />With the WKWMP expansion into Northwest- Kansas, -tlire-e~more <br />aircraft were added to our program bringing its total to nine. All <br />three of the added planes were cloud base seeding aircraft, <br />increasing the total number of that particular aircraft from 5 to <br />8, all of which are single-engine Piper Comanches. The remaining <br />aircraft assigned to the program was the twin-engine Piper Navajo. <br /> <br />Operationally, there were 74 seeding days in 1997 within the <br />WKWMP. It's difficult to compare 1997 to previous years because of <br />such a greatly enlarged target area and having increased our <br />aircraft numbers. It's fair to say the larger the size of the WKWMP <br />target area, the greater will become the average number of both the <br />seeding days and hail-days experienced each season. For example, if <br />the target area were the same this year as last, without Stevens <br />County, there would have been 63 seeding days this season, not 74. <br />In the former WKWMP the year would have been the third highest in <br />number of seeding days in its 23 seasons. There were 47 seeding days <br />in the Northern target area, one totally inside Colorado, with 9 <br />days in which seeding was performed in the Northern target area, but <br />not in the Southern target area. In the Southern target area there <br />were 25 days in which seeding was done while none was performed in <br />the Northern target area. Out of the 74 seeding days, 38 days (51%) <br />had flights common to both areas. <br /> <br />22 <br />