| OCR Text |
Show categories, and summed by season and over the total 10 year period of record used (November-March, 1955-1965). Similar summations were made for each of the two seeded seasons (1965-66 and 1966-67). Using Steamboat Springs as a control station, the ratios r 10 x,n i l = (P X, n I ). 1 1 10 were formed, where i 1 = (P 1 (P s, n ). (15) 1 ) . is the 10 season sum of precipitation JO x,n1 at station x, occurring during category n wind direction, and is the similar summation for Steamboat Springs. r . L 1 = 1 (P ). s, n 1 Table 10 lists the results, , from Table 10 and the contributi By using the 10 year average ratios, to total seasonal precipitation at Steam1>'o11.t Springs for each wind category, (P s, n), a prediction of total seasonal precipitation, (Px)p at each of the othe stations was made. The predictor equation is: 10 (P ) X p, . 1 = n l = r 1 x,n (P s, n ). 1 (16) where i refers to the season in question, and p means predicted. Predictioi were compared with observed seasonal totals (Px)o, i at the stations in ques· tion. Table 11 gives values of (P ) . - (P ) X X O, 1 (P ) X p, . p, i X 10 0% (17) 1 A study of Table 10 reveals a rather organized change in precipitation ratio values with change in average wind direction, especially for those direction categories where there were sufficient observations to give some stability ti the average precipitation ratio value. When the wind direction categories displayed visually in Figure 72 and the observed changes in precipitation ral by direction category noted, the ratio changes appear quite logical based on topographic effects. For example, with direction categories 3 and 4, Steam boat Springs receives its stro_ngest orographic precipitation from the Park 116 |
