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I I I I I I ~I I I I I I I I I I I I I basin (see Appendix I). The next step \-Ia.s to obtain from data available on liE Colorado storms the aver- age maximum updraft area. This data was then used to estimate the average updraft radius for 4 differ- ent cell configurations (see Appendix II). These area-radius calculations wer~ compared with the cri tical updraft area calculati ons and the elevated area estimates to arrive at a reasonable estimate of the updraft area. (see Appendix III) as an independent check on the location of the storm centers. Preciu- itation Frequency ~~ps for Color3do (1967 SCS precip- itation maps) were co nsulted. It was confirmed from these maps that the largest precipitation of the 100- year storm will fall over the peaks outlined below. The l'linimUI1l amount will fall over the valley center and the East slope of Tenmile Range with some extended precipitation further NE along the Divide. Recomendotions a) storm type: Convective, at some stage very likely cumulonimbus. . b) Location of the two centers: 1) Red Mt.-Silverheels complex (on Hoosier Ridge); 2.49 mi. (4.0 kIn.) SSEcf Red Mt.;2.64 mi. (4.25 kIn.) E of Hoosier Pass-Rt.#9 crossing; 1.25 mi. (2.0 kIn.)Inn. of Silverheels ht. The center elevation is 12,0001 J.rSL. 2) Bald }jt.- Boreas l~.complex ; 0.93 mi. (1.5 kIn) SE Bald Nt. ; 1.87 mi. <3.0 kIn.) N of Boreas Nt. ; 0.31 mi. (0.5 Ian.) S of Continental Divide. The center elevation is 12,0001 NSL. c) Areal coverage: A circular area with radius 2.6mi. (4.18 kIn.) centered at each lOcation will give a rough location of where the precipitation will fall. The combined areal coverage is 42.48 mi. (110.01 kIn.) The areal coverage circles may be expanded to 3.<>(11\;.( 5.0 kIn.) with some caution. "