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I I I I I I I I I I I I I I I I I I I Location and Area.1 Distribution. C. This storm is located over the same region as the 100-year storm. Loca.tion of the two centers are: : 1) Red Mo~~tain-Si1verhee1s complex (on Hoosier Ridge); 2.49 mi. (4.0 km.) SSE of Red Mountain; 2.64 mi. (4.25 km.) E of Hoosier Pass- . Rte. #9 Crossing; 1..25 mi. (2.0 km.) NNW of }bunt Si1verhee1s. The center elevation is 12,000 feet MSL; and 2) Eald Mountaln- Boreas M:>untain complex; 0.93.mi. (1.5 km.) SE Bald M:>untain; 1.87 mi. (3.0 km.) N of Boreas Mountain, 0.31 mi. (0.5 km.) S of Continental Divide. The center elevation is 12,000 ft. ~~L. The areal coverage indication is that of two circular areas, one over each site. The radii of these areas are recommended to be 2.3 mi. (3.82 km.) each. The radii may be extended to 2.5 mi. 4.0 km.) with some caution. S.P.F. Event The system most likely for this event is the most complex. It is an orographic sy stem with large convective cells embedded in it. In terms of the areal distribution of the precipitation, this means that the basin area to either side of the Divide will be receiving precipitation from an orographic cloud while certain areas l.i11 receive very heavy precipitation amounts from the convective cells embedded in the orographic clouds. The convective cells will eventually grow in large cumulonimbuii and overshadow the orographic clouds by organizing the meso-scale flow. The particular cell configuration chosen for this event is a two cell per complex system, similar to "System E" as reported in Appendix II of the August 3 report; however, the complex is not symetric. Each cell is conforming more to the terrain and the flow conditions. The actual configuration (given below) is such that it included \ \ ,I I, CwT /- - - - o.V,OE / \ // U\:')- ~{ I I " \ - --\. -/ I - , I ! . \ \ ,- i , I I \ \ \