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<br />00l1:H <br /> <br />. <br /> <br />. <br /> <br />APril 15. 1999 Forecast of Colorado River Flow into <br />lake PI:1.Yell(11 (Million Acre-feet) <br /> <br />USER an:i National Weather Service <br />APril-Jul V Water Year 1999 <br /> <br />01arqe From Last <br />Month I s Forecast <br />APril-Julv Wat Yr 1999 <br /> <br />MaxirmJm(2) <br />loEan <br />MininUJIn (2) <br /> <br />2.800 <br /> <br />6.267 <br /> <br />-1.200 <br />-0.700 <br />-0.400 <br /> <br />-1.270 <br />-0.870 <br />-0.570 <br /> <br />7.300 <br /> <br />11.567 <br /> <br />5.000 * <br /> <br />8.867 ** <br /> <br />* '!his IOOnth's A-J forecast is 65% of 30-year A-J average sI'u:M1 below. <br />** 'Ihis m::mth's WY forecast is 76% of 30-year WY average sI'u:M1 below. <br /> <br />O:lIlDarison with past records <br />of Colorado River <br />inflow into lake ~l <br />(at Lee Ferry prior to 1962) <br /> <br /> APril-Jul V Flow Water Year Flow <br />lDn:J-'l'irre Average (1922-98) 8.071 11.917 <br />30-yr . Average (1961-90) 7.735 11.724 <br />10-yr . Average (1989-98) 6.912 10.620 <br />Max. of Record 15.404 (1984) 21.873 (1984) <br />Min. of Record 1. 286 (1977) 3.663 (1977) <br />Last Year (1998) 8.625 13.660 <br /> <br />(1) Un::ler =nditions of no other Upper Basin reservoirs. <br /> <br />(2) USER an:i i'lWS forecasts irYlicate the probability of 19 chances out of <br />20 that the actual flow will not exceed the maximum value, an:i will not be <br />less than the minimum value. <br /> <br />-5- <br />