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<br />These early results from several independent sources are forming a <br />clearer picture of processes at work in Sierra Nevada storms. The <br />winter of 1976-77 was unusual because of drought conditions. Only <br />limited data were collected. The abundance of precipitation during <br />the winter of 1977-78 was equally unusual. Storm types were generally <br />southwesterly with warm bases, deep clouds, and cold tops. However, <br />the data base from which these conclusions were derived may contain <br />extremes and, thus, may not be representative of normal conditions. <br /> <br />. <br /> <br />C. EXPERIMENTAL AREA AND FACILITIES <br /> <br />Figure 1-1 shows the SCPP primary study areas and the two extended <br />areas of effect. The primary study area includes: that portion of <br />the American River Basin above 4000 ft, portions of the Truckee <br />Basin adjacent to the American River Basin, and the eastern slopes <br />of the Carson Range down to 5000 ft. The area is closely approxi- <br />mated by a six-sided figure comprised of straight lines connecting <br />the following six points: 1. Blue Canyon, California, 2. Mt. Lincoln <br />in California, 3. Huffakers, Nevada, 4. Woodfords, California, <br />5. Plasse, California, and 6. Pacific House, California. <br /> <br />e <br /> <br />Extended area No.1 is described by a five-sided figure with the <br />sides intersecting: 1. Jackson, California, 2. Oroville, California, <br />3. Susanville, California, 4. Lovelock, Nevada, and 5. Highway No. 167 <br />in Nevada. It includes the Trinity and Wassuk Ranges in Nevada. <br /> <br />"- <br /> <br />e <br /> <br />1-12 <br />