Laserfiche WebLink
<br />Oll1433 <br /> <br />. <br /> <br />. <br /> <br />April 5. 2004 Forecast of Colorado River Flow into <br />Lake Powell (1) (Million Acre-feet) <br /> <br />USBR and National Weather Service <br />April-July Water Year 2004 <br /> <br />Change From Last <br />Month's Proiected <br />April-July Wat Yr 2004 <br /> <br />Maximum (2) <br /> <br />6.800 <br /> <br />Mean <br /> <br />4.000 . <br /> <br />Minimum (2) <br /> <br />1.500 <br /> <br />9.755 <br /> <br />-1 .200 <br /> <br />-1.100 <br /> <br />6.655 .. <br /> <br />-0.600 <br />-0.300 <br /> <br />3.755 <br /> <br />-0.600 <br />-0.300 <br /> <br />. This month's A-J observed is 50% of the 30-year A-J average shown below. <br />*' This month's W-Y observed is 55% 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 (1922-2003) <br />30-yr Average (1961-90) <br />10-yr Average (1994-2003) <br /> <br />Max. of Record <br /> <br />Min. of Record <br /> <br />Last Year (2003) <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 />3.918 <br /> <br />11.699 <br />11.724 <br />11.260 <br />21.873 (1984) <br />3.058 (2002) <br />6.358 <br /> <br />(1) Under conditions of no other Upper Basin reservoirs. <br /> <br />(2) USSR 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 />