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I I I I I I I I I I I I I I I I I I I III. 4. A cell configuration consistent with the critical updraft area calculations, effec- tive elevated areas and the illll11ediate flow environment was estimated. 5. Precipitation frequency maps for Colorado were used as an independent check on the analysis. Recollll11endations A. 10- ~ Event Location.and Areal Distribution. The results of the previous study indicate that two single cell systems would be adequate to process the volume of air required, at a given efficiency, to cause the rain observed. - t. -~. C- -~ - - - - \~~'~/~- , ' - - ~ ./ ...e....de. This indication is borne out by critical up- draft area calculations. The first cell is most likely to be located over the peak of Pald Ycuntain. It is .25 mi. (.40 kIn.) NNW of the Continental Divide at an elevation of 13,250 feet MSL. Be- cause of the size of this system, the effective elevated area used was determined by the 13,000 ft. contour (see Appendix II). The second cell has two Dossible locations. The first is over Hoosier Ridge and the second is over the Mount Silverheels peak. The slightly favored position which is recom- mended is the Hoosier Ridge site. It is .15 mi. (.25 kIn.) due east of the Continental Divide 1.2 mi. (1.99 kIn.) SSE of the Red Mountain Peak, 2.82 mi. (4.68 Ian.) ENE of Hoosier Pass - Rte. #9 crossing, at an elevation of 12,700 ft. ~mL. The critical ~ea calculations, the predominant flow regimes, and the elevated ar~a study indicate that two circular areas with radii wi th a minimum of 1.0 mi. (1.6 lcrn.) and a maximum of 1.9 mi. (3.14 kIn.) are sufficient. Since smaller systems tend to be less efficient, the large radii of 1.9 mi. is recollll11endea. 13. S2.-~ Event