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usually from the south and southwest, and are associated with thunderstorms or <br /> with pre-frontal weather." <br /> Wind Speed and Wind Direction <br /> Wind speed and wind direction are not recorded at the Nucla Mine site nor is it available <br /> from the Uravan or Norwood Stations. The closest National Weather Service Station that <br /> records wind information is at Grand Junction, Colorado. <br /> The prevailing wind direction at Grand Junction is from the east-southeast at a mean wind <br /> speed of 8.1 miles per hour. It must be stressed that the information from Grand Junction <br /> does not likely apply to the Nucla Mine site. The Grand Junction Station is situated in a <br /> valley (elevation 4,849 feet), surrounded by mountains and is greatly influenced by the <br /> valley winds rather than the synoptic winds. The mine site is, however, located above a <br /> valley on a mesa (elevation approximately 5,700 feet) and is therefore more likely to be <br /> subject to the synoptic winds from the west to southwest (Dosken, 1980 and Benson, 1979). <br /> Precipitation and Temperature <br /> Norwood and Uravan, Colorado are the locations of the nearest precipitation and <br /> temperature data to the Nucla Mine. It should be stressed that these stations may not <br /> accurately represent the conditions at the Nucla Mine. Both stations are located deep <br /> within valleys, and are subject to localized conditions such as cold air drainage into the <br /> lower valleys. Generally, however, the data presented in Tables 8-1 and 8-2 is <br /> representative of the local mine area. <br /> Table 8-1 presents monthly precipitation normals for the Norwood Station for the period <br /> 1951 through 1980. Monthly precipitation normals for the Uravan Station are not <br /> published. Also presented are monthly precipitation totals for the year 1986 for both <br /> stations. <br /> Table 8-2 presents monthly temperature normals for the Norwood Station for the period 1951 <br /> through 1980. Monthly temperature normals for the Uravan Station are not published. Also <br /> presented are monthly average temperatures for the year 1986 for both stations. <br /> On June 24, 1987 a Belfort Model 5-780 Universal Rain Gauge was installed at Nucla East at <br /> 8-3 Revised 04/11/88 <br />