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<br />. -{)-O-11 no _____ ________________.________________ <br />- -- ----- - - - ~~,.'..,. . <br /> <br />June 1. 2000 Forecast of Colorado River Flaw into <br />lake Powell (1) (Million Acre-feet) <br /> <br />USBR and National Weather Service <br />Aoril-July Water Year 2000 <br /> <br />Change Frcm Last <br />M::>nth's Forecast <br />APril-July Wat Yr 2000 <br /> <br />Maximum (2) <br /> <br />7.400 <br /> <br />11.263 <br /> <br />-0.200 <br /> <br />-0.289 <br /> <br />M2an <br /> <br />5.400 * <br /> <br />8.863 ** <br /> <br />+0.100 <br /> <br />+0.011 <br /> <br />Minimum (2) <br /> <br />3.400 <br /> <br />6.463 <br /> <br />+0.300 <br /> <br />+0.211 <br /> <br />* 'TI1is rronth's A-J forecast is 70% of 30-year A-J average shown below. <br />** 'TI1is rronth's W'f forecast is 76% of 30-year W'f average shown below. <br /> <br />Ccrnoarison with past records <br />of Colorado River <br />inflow into lake Powell <br />(at lee Ferry prior to 1962) <br /> <br /> APril-Jul y Flaw Water Year Flow <br />Long-TillE Average (1922-99) 8.065 11.927 <br />30-yr. Average (1961-90) 7.735 11.724 <br />10-yr. Average (1990-99) 7.321 11.238 <br />M3x. of Re=rd 15.404 (1984) 21.873 (1984) <br />Min. of Re=rd 1. 286 (1977) 3.663 (1977) <br />Last Year (1999) 7.621 12.712 <br /> <br />(1) Under conditicms of no other Upper Basin reservoirs. <br /> <br />(2) USBR and NWS forecasts indicate the probability of 19 chances out of <br />20 that the actual flaw will not exceed the rraximwn value, and will not be <br />less than the minimum value. <br /> <br />-5- <br />