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<br />low and the difference between cloud base and cloud top temperatures <br />is greates t. <br />The distribution of average temperatures for the surface (fig. 21), <br />moist layer base (fig. 22), and moist layer top (fig. 23) for upslope <br />seedab1e conditions at all rawinsonde stations in the High Plains are <br />shown. Note that the surface temperatures are rather cold, averaging <br />about 40C in central Texas and -loC in the northern High Plains. The <br /> <br />UPSLOPE' 'SEEDABLE' SITUATIONS <br /> <br />UPSLOPE' 'SEEDABLE' SITUATIONS <br /> <br /> <br />Surface Temperatures eC) <br /> <br />Moist Layer Base Temperature (OC) <br /> <br />Figure 21: Mean surface tempera- <br />tures (OC) for seeddble upslope <br />episodes. <br /> <br />Figure 22: Mean .cloud base <br />temperatures (OC) for seedable <br />upslope cloud systems. <br /> <br />28 <br /> <br />- <br /> <br />I <br />