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<br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />.' <br />. <br />. <br />. <br />.' <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br /> <br />addition to the fact that weather modification operations do not affect the parameters <br />(wind and temperature) included in the NWS's criteria for issuing the warning. <br /> <br />It is therefore NA WC's policy that winter orographic seeding will not be <br />suspended solely upon the issuance of Traveler Advisories, Heavy Snow Warnings, or <br />Winter Storm Warnings. <br /> <br />Concerning Flash Flood Warnings, NAWC will suspend seeding operations upon <br />individual convective systems or areas in which warnings are issued that impact <br />Gunnison County. This action will be taken to avoid any appearance of contributing to <br />damaging weather situations. <br /> <br />On some programs, limits are set on the percent of normal levels of either <br />precipitation or snow water content at Natural Resources Conservation Service mountain <br />Snontel sites, within the target area of the project. Data are available from these sites on <br />a daily basis. If these limits are exceeded, then seeding is suspended until the percent of <br />normal falls under the limit or the project is terminated for the season. This procedure is <br />designed to curtail seeding in above normal snowpack years that may produce high <br />spring and/or summer streamflow. Such a procedure is proposed for the conduct of the <br />Gunnison County Project. Snotel sites that are representative of the proposed target area <br />will be selected with approval of these sites provided by the Colorado Water <br />Conservation Board. The proposed criteria for suspension will be based upon averages of <br />snow water content from the selected Snotel sites. Seeding will be suspended whenever <br />these averages exceed the following percentages: <br /> <br />. <br /> <br />175 % during the month of December <br />160 % during the month of January <br />150% during the month of February <br />140% during the month of March <br />130% during the month of April <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />28 <br />