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<br />\ <br />'1 <br /> <br />001337 <br /> <br />. <br /> <br />. <br /> <br />Auaust 1, 2002 Final Forecast of Colorado River Flow into <br />Lake Powell (1) (Million Acre-feet) <br /> <br />USSR and National Weather Service <br />April-Julv Water Year 2002 <br /> <br />Change From Last <br />Month's Forecast <br />April-Julv Wat Yr 2002 <br /> <br />Maximum (2) <br /> <br />1,115 <br /> <br />3.273 <br /> <br />-0.785 <br /> <br />-1.164 <br /> <br />Mean <br /> <br />1.115 * <br /> <br />2.973 ** <br /> <br />Minimum (2) <br /> <br />1.115 <br /> <br />2,673 <br /> <br />-0,185 <br />0.415 <br /> <br />-0.464 <br /> <br />0.236 <br /> <br />* This month's A-J forecast is 14 % of the 30-year A-J average shown below, <br />** This month's VIIY forecast is 25 % of the 30-year W- Y average shown below. <br /> <br />Comparison with past records <br />of Colorado River <br />inflow into Lake Powell <br />(at Lee Ferry prior to 1962) <br /> <br /> April-Julv Flow Water Year FloW <br />Long-Time Average (1922-2001) 8.018 11.869 <br />30-yr. Average (1961-90) 7.735 11.724 <br />10-yr. Average (1992-2001) 7,672 11.739 <br />Max. of Record 15.404 (1984) 21.873 (1984) <br />Min. of Record 1.286 (1977) 3,663 (1977) <br />Last Year (2001) 4.301 6.955 <br /> <br />(1) Under conditions 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 flow will not exceed the maximum value, and will not be <br />less than the minimum value. <br /> <br />-5- <br />