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<br />National Weather Service <br />Colorado Basin River Forecast Center <br />Salt Lake City Utah <br /> <br />December Kid Month Forecast December 15, 1997 <br /> <br />** FINAL FORECASTS APPEAR APPROXIMATELY 7 DAYS AFTER PRELIMINARY FORECASTS ** <br /> <br />RESERVOIR UNREGULATED INFLOW FORECASTS <br />1 APRIL THROUGH 31 JULY 1998 (units: 1000's ACRE-FEET) <br /> <br />NAME <br />LAKE POWELL <br />NAVAJO RES <br />VALLECITO RES <br />BLUE MESA RES <br />FONTENELLE <br />FLAMING GORGE <br /> <br />LAKE POWELL <br />BLUE MESA <br />CRYSTAL UNREG** <br />FONTENELLE <br />FLAMING GORGE <br />VALLECITO <br />NAVAJO UNREG <br />va11ecita chg stg <br />Azotea tunnel f10 <br />NAVAJO REGLTD * <br /> <br />MOST <br />PROBABLE <br />8500 <br />815 <br />215 <br />750 <br />725 <br />1025 <br /> <br />REASONABLE <br />MAX (10%) <br />12760 <br />1393 <br />313 <br />1185 <br />1188 <br />1686 <br /> <br />REASONABLE <br />MIN (90%) <br />4250 <br />232 <br />122 <br />31S <br />255 <br />370 <br /> <br />MONTHLY DISTRIBUTION OF FLOW (1000's A-F) <br /> <br />Aug <br />1064 <br />98 <br />109 <br />141 <br />172 <br />39 <br />89 <br />-15 <br />2.5 <br />101. 5 <br /> <br />OBS <br />Sep Oct <br />1038 1034 <br />67 68 <br />74 68 <br />84 70 <br />114 92 <br />39 24 <br />107 70 <br />-18 -10 <br />3 1.5 <br />122 78.5 <br /> <br />Nav <br />674 <br />41 <br />48 <br />53 <br />76 <br />9.6 <br />32 <br />-3 <br />0.5 <br />34.5 <br /> <br />FORECAST <br />Dee Jan Feb <br />SOO 425 425 <br />27 25 22 <br />35 33 30 <br />35 31 29 <br />40 42 49 <br />7 6 4 <br />22 23 30 <br />000 <br />000 <br />22 23 30 <br /> <br />725 85% <br />1025 86% <br />21S 110% <br />815 106% <br /> <br />OUTLOOK <br />Ap-Ju1 %AVG <br />8500 110% <br />750 107% <br /> <br />%AVG <br />129% <br />134% <br />123% <br />124% <br />141% <br />137% <br />100% <br /> <br />* REGULATED FORECASTS ARE DERIVED FROM ANALYZING THE RECORD <br />AND COMPARING IT TO AVERAGES. THESE FORECASTS HAVE AN <br />ADDITIONAL SOURCE OF ERROR BECAUSE THE RESERVOIR AND TUNNEL <br />OPERATORS MAY SUBSTANTIALLY DEVIATE FROM THE ESTIMATED <br />REGULATION. <br />** UNREGULATED CRYSTAL INFLOW COMBINES BLUE MESA UNREGULATED <br />INFLOW PLUS THE SIDE INFLOW TO BOTH MORROW POINT AND CRYSTAL <br /> <br />PRECIPITATION SUMMARY - % OF AVERAGE BY MONTH - WY 1997 <br />RIVER BASIN: APR MAY JUN JUL AUG SEP OCT NOV <br />GREEN <br />ABV FLAMING GORGE 130 90 120 140 190 160 95 60 <br />ABV GRN RVR,UT(TOTAL) 150 110 125 120 210 265 105 65 <br />COLORADO <br />ABV GRAND JUNCTION 170 150 90 65 150 200 1S0 90 <br />GUNNISON BASIN 170 160 170 75 140 180 140 105 <br />ABV CISCO (TOTAL) 170 155 120 7S 14S 195 140 95 <br />SAN JUAN <br />ABV BLUFF (TOTAL) 150 135 14S 115 115 195 110 100 <br /> <br />C. McCarthy/J. Smith/D. Van Cor <br />CBRFC (801-524-5130) <br /> <br />1570 <br />