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<br />-1 <br />1 <br /> <br />L <br /> <br />Air-mass storms begin as isolated cloud systems and develop a <br />well-organized cloud base usually with an eas11y delineated inflow <br />area protruding below its base: Specific cloud movements may vary <br />widely depending upon the heigbt individual clouds reach as well as <br />the variability of wind speed and direction with height. Terrain <br />ezzects probably play same role despite Kansas' relative flatness. <br /> <br />I <br />I <br /> <br />If we draw a line through the center of the precipitation area <br />of an air-mass storm in the direction of storm IDDvement and another <br />line at right angles to it. also through the center of the <br />precipitation area, updrafts found upwind in the cloud are termed <br />..trailing" or"back slde"j downwind, ahead of the line, 1s the <br />ttfron"t side". Although updrafts are sometimes found on the front <br />part of an air-mass storm, it is not considered to be of primary <br />importance to the formation of precipitation, Normally, updrafts <br />important to these storms are found below cloud base at some <br />distance behind the precipitation area, usually along the trailing <br />edge of the storm. A typical air-mass storm and seeding methods <br />are shown in Fig. 3. <br /> <br />I <br /> <br />30.000"'-. <br /> <br /> <br />---------- <br />_ ~r <br />r <br />r--- <br /> <br />~ <br /> <br />I <br /> <br />I <br />I <br /> <br />2O,oooFT. <br /> <br />~ <br /> <br /> <br />CLOUD TOP SEEDING <br /> <br />~ <br /> <br />;J!'c ~r) <br /> <br />I <br /> <br />18,000". <br />." <br /> <br />MATURE <br />STORM CELL <br /> <br />l <br />I <br /> <br />8,000"'-. <br />." <br /> <br />CLOUD BASE <br />SEEOING <br /> <br />tll"onAFT A~EA <br /> <br />:.1.ooorr. <br />." <br /> <br />Seeding a Typical Air Mass Storm <br /> <br />Figure 3 <br /> <br />10 <br />