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<br />00 131 ~. <br /> <br />. <br /> <br />", <br /> <br />Mav 3, 2002 Preliminarv Forecast of Colorado River Flow into <br />Lake Powell (1) (Million Acre-feet) <br /> <br /> Change From Last <br /> USBR and National Weather Service Month's Forecast <br /> April-Julv Water Year 2002 April-Julv Wat Yr 2002 <br />Maximum (2) 4.700 7.232 -1.100 -1.308 <br />Mean 2.400 * 4.532 - -0.600 -0.908 <br />Minimum (2) 0.200 1.932 -0.300 -0.608 <br /> <br />* This month's A-J forecast is 30 % of the 30-year A-J average shown below. <br />- This month's WY forecast is 38 % 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 />