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<br />) <br /> <br />. <br /> <br />OOHnJ <br /> <br />. <br /> <br />October 1, 2003 Final Forcast of Colorado River Flow into <br />Lake Powell (1) (Million Acre-feet) <br /> <br />USBR and National Weather Service <br />April-July Water Year 2003 <br /> <br />Change From Last <br />Month's Proiected <br />April-Julv Wat Yr 2003 <br /> <br />Maximum (2) <br /> <br />3.918 <br /> <br />Mean <br /> <br />3.918 . <br />3.918 <br /> <br />Minimum (2) <br /> <br />6.658 <br /> <br />0.000 <br /> <br />0.041 <br /> <br />6.358 .. <br /> <br />0.000 <br />0.000 <br /> <br />0.041 <br /> <br />6.058 <br /> <br />0.041 <br /> <br />. This month's A-J observed is 49% of the 30-year A-J average shown below, <br />.. This month's W- Y forecast is 53% 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 />Long-Time Average (1922-2002) <br />30-yr. Average (1961-90) <br />10-yr, Average (1993-2002) <br />Max. of Record <br /> <br />Min, of Record <br /> <br />Last Year (2002) <br /> <br />April-July Flow <br /> <br />Water Year Flow <br /> <br />7.887 <br />7.735 <br />7.027 <br />15.404 (1984) <br />1.115 (2002) <br />1.115 <br /> <br />11.699 <br />11.724 <br />11 .260 <br />21.873 (1984) <br />3.058 (2002) <br />3.058 <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 /> <br />...'l' ~ <br />