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<br />Hour of <br />Day <br /> <br />Dec. 27 <br /> <br />Ouray <br /> <br />Telluride <br /> <br />Silverton <br /> <br />Durango <br /> <br />Dec. 28 <br />Ouray <br />Telluride <br />Silverton <br /> <br />Durango <br /> <br />Dec. 29 <br />Ouray <br />Telluride <br /> <br />Silverton <br /> <br />Durango <br /> <br />TABLE XIV --Hourly precipitation, December <br />27 - 29, ll364 (hundredths of an inch). <br /> <br />1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20" 21 22 23 24 <br /> ,,. <br /> 3 3 4 <br /> 9 7 7 4 2 8 <br /> 2 2 4 2 3 3 4 8 5 9 7 7 10 2 6 <br />6 6 3 2 3 2 2 4 4 4 3 7 5 2 8 1 <br /> 2 4 7 6 2 2 <br /> 6 2 X X X X X X <br />3 3 2 2 2 3 4 4 <br />5 12 9 2 <br /> 2 3 5 <br />X X X X X X <br />2 3 I <br /> <br />TABLE XV. --Matrix of partial c::>rrelation coefficients of 9 <br />stations located in the northern and central Colorado Rockies. <br />Sample consists of 545 daily precipitation amounts for the <br />period November - April. <br /> <br /> Climax Aspen Crested Eagle Fraser Marvine Shoshone Winter Park Grand <br /> Butte Lake 6SSW <br />Climax 1. 000 .615 .573 .340 .500 .381 .387 .733 .005 <br />Aspen 1. 000 .730 .399 .363 .470 .538 .478 .023 <br />Crested Butte 1.000 .437 .361 .481 .561 .423 .026 <br />Eagle 1. 000 .188 .383 .519 .213 ~.012 <br />Fraser 1. 000 .258 .299 .611 .044 <br />Marvine 1.000 .453 .305 .051 <br />Shoshone 1. 000 .338 .110 <br />Winter Pa rk 1. 000 .089 <br />Grand Lake 6SSW 1.000 <br /> <br />~O;_;Jidered LOr weather ,modification efforts above <br />the value that would be estimated from single <br />stations. <br /> <br />The homogeneity of precipi tation over <br />sub-areas of the Colorado River Basin can also be <br />shown by the correlation between stations. Correla- <br />tion matrices for a group of stations in the Upper <br />Basin is shown in Table XV and a matrix for the San <br />Juan area is shown in Table XVI. It can be noted <br />that the best correlations of daily precipitation are- <br /> <br />generally around. 7 to .8. Most values are <br />considerably lower. This is a reflection of the <br />different elevations and exposures of the respective <br />stations where historical records exist. Tables XVII <br />and XVIII, respectively, show multiple correlations <br />between Climax and other northern stations, and <br />between Wolf Creek summit and other San Juan <br />stations. It can be noted that such multiple cor- <br />relations explain something over 60% of the <br />variability in th'e northern areas and something over <br />50% in the San Juan area. <br /> <br />49 <br />