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as they are for individual sites. Notice again how rapidly drought and wet conditions appear and disappear at the 3 month time scale. In the Yampa-White (YW) (Figure 8a) there are about 65 drought periods and 69 dry periods. At the 48 month time scale, there were 8 or 9 drought periods and 11 wet periods. It is also quite clear the duration of dry or wet periods is greater at the longer time scales. Table 5 contains a summary of dry and wet period from each of the regions arranged in the time periods defined in Table 4. The years that are dry or wet consistent with Table 4 are listed in the columns. If the region was mixed in dry and wet or didn't move far from the average then an "M" appears in the table. Most of the river basins did experience dry and wet conditions near the same time periods. The major wet period 1905-1931 was widespread. The drought of the 1930s was not nearly as pronounced in western Colorado. The wet period 1965-75 was not at all uniform. The recent wet period 1979-96 had a significant break in northwest Colorado which is most evident in the Yampa-White (YW). Each of the regions have some unique characteristics with drought and wet periods. These will be discussed in order of the graphs in Figure 8. The Yampa-White (YW) is represented by only 3 stations of which 2 are in the Yampa drainage. The data prior to 1900 is just from one site - Meeker. It does show a major dry period in the first 5 years of this century. The three stations do not have the same seasonal variation. Steamboat Springs has a mid-winter precipitation maximum but Hayden has a maximum in August. This indicates a substantial variation with elevation in the Yampa-White (YW) drainage. For the 3 month time scale the recent droughts of 1994, 1981, 1976-1977, 1971 and 1966 are as intense as any this century. The period 1981-1994 was remarkably free from drought. The 12, 24 and 48 month graphs all show 18