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Table 5. Recommended final list of stonns for consideration in investigating extreme rainfall potential in the Rocky Mountain region of Colorado. Locations of climatic regions are shown on Figure 2, page 7. No. Stonn Name Date Maximum Precipitation Climatic Region 242 Sweetwater Jul. 12, 1976 6" hnd6 243 Big Thompson Jul. 31, 1976 12~' 2 256 Frijole Creek Jul. 2-3, 1981 8-16" 2 270 Jim Creek Jul. 20, 1983 2" in briefperiodl high elev. 4 277 Redstone Jun. 5-8, 1984 3" :3 and 4 304 Deadman Hill Aug. I, 1989 2.8" at high elev. 4 306 Opal, WY Aug. 16, 1990 7"/ 2 hrs. 6 312 Rifle! Govnmt. Creek May 15, 1993 4"/2 hrs. 6 313 Delta! Roubideau Aug. 10, 1993 4"/2 hrs. 5 315 SW CO/ Wolf Creek Aug. 27-30, 1993 3~" :3 It is worth noting that the list of storms includes a subset of 11 stonns that produced more than 10 inches of rainfall that stand out as by far the greatest rains reported in Colorado this century. No storms of this magnitude appmu- in the observed data in the high mountains or over western Colorado. By far the greatest propensity for such stonns is along the eastern base of the Rocky Mountain foothills. Numerous other Front Range stonns were not included on the final stonn list even though their precipitation amounts may have significantly exceeded reported extremes for other areas of Colorado. Specific attention was given to include the most extreme observed General and Local Convective Stonns for higher mountain and Western Slope locations even though rainfall amounts for these stonns may be significantly less than Front Range stonns. Two consulting meteorological finns already familiar with extreme precipitation characteristics and the application of the probable maximum precipitation concept in the Rocky Mountain Region were hired as consultants to the Extreme Precipitation Data Study during the summer of 1996 to expand project expertise. The result of this participation was more detailed infonnation on extreme stonns that influence probable maximum precipitation estimates at higher elevations in Colorado. A portion of this consulting work was completed after the October 24, 1996 stonn list review meeting. Written infonnation about individual stonns provided by the consultants; Henz Meteorological Services of Denver, Colorado and Dr. Ed Tomlinson working through North American Weather Consultants of Salt Lake City, Utah; were filed in the appropriate stonn files and will be retained at the Colorado Climate Center. 28