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<br />6 <br /> <br />PRECIPI'I'l\TION <br /> <br />~~he precipitation i11 the drainage basin ranges from <br />lO inches to 50 inches annually" The hiqher elevations <br />x'eceive the greater amounts .in 1:.1K' form of 1.intelc snow-- <br /> <br /> <br />fall. This is orographic precipi.t,at:ion which res'lll b:, <br /> <br /> <br />from mechanical lifting o1f 1110isbll:e inflowing from the <br /> <br /> <br />western coast against the 'N8steul slope of the Rocky <br /> <br /> <br />Mountains. The Rockies a.re the tirst major moisl:ure <br /> <br /> <br />barrier after the Cascades. The orographic effec'l: does <br /> <br /> <br />not occur at the lower elevat:ionE; which ]~esul 1:s in .1 ess <br /> <br /> <br />precipitation for these areas. <br /> <br /> <br />The 6-hour 50 year :rrec:ipit.a.tJ,on is 1..6 inches .."1t <br /> <br /> <br />DeBeque Canyon and .:1" 2 incJw<:; iL the higher mount:ains. <br /> <br /> <br />Local summer thund'~rstorJ.lls can te very intens,s, but of <br /> <br /> <br />short duration alonq the river c:a:Tyons. Sununer i.hunC:.er-- <br /> <br /> <br />storms in the high elevat:.ion<i an, srenerally of medium teo <br /> <br /> <br />light intensity. '['he I'leat:her- Bm:eau precipitation Cja'Jes <br /> <br /> <br />at Glenwood Sprin"s ,. Aspen and }':ql.SE';C show the 9red-tell:' <br /> <br /> <br />precipi tation occuring during 'the first four :months of <br /> <br /> <br />the year wi th a gradual decrease thru the end of t:he <br /> <br /> <br />year. <br />