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. 'Jlril.. 2 GREEN RIVER BASIN: Water supply forecasts above Flaming Gorge Reservoir, in the Yampa and White drainages and along the east slopes of the Wasatch Mountains increased 5 to 15 percent over those issued last month. In the Duchesne basin forecasts dropped an average of 5 percent. Over all the water supply outlook is very good with all forecasts indicating above normal flows this snowmelt season. April precipitation was generally 150 to 200 percent of normal, except in the Duchesn~ basin fu~d the extreme northern portion of the Green River Basin where precipitation amounts were 70 to 100 percent. Seasonally, October through April totals averaged 150 to 200 percent of normals. In the Vfuite and Yampa drainages there were numerous seasonal records set for precipitation. Steamboat, Hayden, Little Hills and Marvine Ranch all have new records for this period. May 1 snowpack measurements showed many sites continued to accumulate snowpack when normally they would decline during the month of April. Some May 1 snowpack basin averages are: Green above Fontene11e - 90%, Green above Flamil~ Gorge - 93%, Ham Fork - 99%, White - 164%, Yampa - 141%, Strawberry - 163%, Duchesne - 122%, Price - 174%, Huntingotn - 162%, and Fremont - 300%. Streamflows are still above normal throughout the Green River Basin. Flew during April on the Green River at Green River, Utah was 631,000 acre-feet, 150 percent, inflow to Fontenelle Reservoir was 108,600 acre-feet, 117 percent and inflow to Flaming Gorge was 224,000 acre-feet, 133 percent. Streamflow fo~ October through April on the Green River at Green River, Utah was 2.29 million acre-feet, 175% of averags. Reservoir end-of-month storage 79 percent of average and 44% million acre-feet, 131 percent in Fontenelle Reservoir was 151,2000 acre-feet, of capacity. Flaming Gorge storage was 3.067 of average and 82 percent of capacity. Flood Potential varies throughout the basin but is highest in the drainages along the east slopes of the Wasatch. SAN JUAN RIVER BASIN: The water supply outlook for the San Juan Basin indicates adequatA suppJies witb str8Rmflow flo~eca8t8 increasing about 5% over last months forecasts and now range from 107% to 132%. April precipitation varied from 92% at Ignacio to 184% at Cortez, but amounts were generally.120 to 160%. In many areas it was the first month above normal since December. Seasonal precipitation, October through April, ranges between 80 to 120% of normal. Snow surveys conducted on May 1 indica~e about a 10% increase above normal. The snow pack over the basin averages 116% of normal, 32% of last year while over the Animas drainage the mountain snowpack is 120% of normal and 95% of last year.