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<br /> <br /> Legend (in inches} <br />. Under 10 D 35 to 40 <br />. 1 0 to 15 D 40 to 45 <br />D 15 to 20 D 45 to 50 <br />D 20 to 25 . 50 to 55 <br />I!I 25 to 30 III Above 55 <br />. 30 to 35 <br /> <br />Period: 1961-1990 <br /> <br />This map is a plot of 1961-1990 annual average <br />precipitation contours from NOAA Cooperative <br />stations and (where appropriate) USDA-NRCS <br />SNOTEL stations. Christopher Daly used the PRISM <br />model to generate the gridded estimates from which <br />this map was derived; the modeled grid was <br />approximately 4x4 km latitude/longitude, and was <br />resam pled to 2x2 km using a Gaussian filter. <br />Mapping was performed byJennyWeisburg. <br />Funding was provided by USDA-NRCS National <br />Water and Climate Center. <br /> <br />12/8/97 <br /> <br />. <br /> <br />Average Annual Precipitation <br />Colorado <br /> <br />