Laserfiche WebLink
<br />. ~ <br /> <br />001423 <br /> <br />.. <br /> <br />. <br /> <br />February 4. 2004 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 2004 <br /> <br />Change From Last <br />Month's Proiected <br />April-July Wat Yr 2003 <br /> <br />Maximum (2) <br /> <br />1 0.400 <br /> <br />13.800 <br /> <br />-1.200 <br /> <br />-1.200 <br /> <br />Minimum (2) <br /> <br />-0.200 <br /> <br />-0.600 <br />-0.200 <br /> <br />Mean <br /> <br />6.500 * <br />3.300 <br /> <br />9.500 ** <br />5.900 <br /> <br />-0.600 <br /> <br />* This month's A-J observed is 82% of the 30-year A-J average shown below. <br />** This month's W-Y observed is 79% 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-July Flow Water Year Flow <br />Long-Time Average (1922-2002) 7.887 11.699 <br />30-yr. Average (1961-90) 7.735 11.724 <br />10-yr. Average (1993-2002) 7027 11.260 <br />Max. of Record 15.404 (1984) 21873 (1984) <br />Min. of Record 1115 (2002) 3058 (2002) <br />Last Year (2003) 3.918 6358 <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 />