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4 <br /> YAMPA/WHITE BASIN <br /> Basinwide Conditions Assessment: ' <br /> The SWSI value of -1.5 indicates that for April the YAMPA-WHITE RIVER BASINS <br /> basin water supplies were slightly below normal. The Soil S Surlece Water Supply Index History <br /> Conservation Service reports April 30 snowpack at 76% of 4_ <br /> normal. The National Weather Service reports basin i , <br /> u+ 3— <br /> precipitation as 115% of normal during April. Flow at the .=r-gaging station Yampa River at Steamboat averaged 394 cfs as 2- -,I , - =� <br /> compared to the 1961-1993 April average of 598 cfs. - i ,w ' 1 -- <br /> A significant decrease in snowpack in the Steamboat g 0 .-=- 1 F ,.h..' Tr_ i 4_...,_ <br /> area, down to 62% of normal, was the result of warmer than _ / I I I J ;, ;; r <br /> normal temperatures in Routt County. The decrease would Y _ ' - : ; : ;��`; <br /> have been even greater without the storm events during the 2 ;�' 1 <br /> .... <br /> -,, <br /> second and fourth weeks of April. The remaining snowpack -3- {, <br /> is limited to elevations above 8,000 feet. The water content - - <br /> JAN8S JANBG JAN87 JAN88 JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 <br /> at the Tower Snowtel on Buffalo Pass was measured at 45.1 IAONTH/YEAR <br /> inches which will provide a reasonable runoff. Soil moisture <br /> in the area is reasonably high. Stream flows increased slightly ' <br /> during April,but have stabilized with the cooler temperatures. <br /> Reservoirs have started storing water. <br /> YAMPA RIVER AT STEAMBOAT <br /> Outlook 90 FLOW BY WATER YEAR <br /> Stream flows will depend on temperatures and 80 <br /> precipitation during the next two months. There may be 70 r <br /> insufficient runoff to meet irrigation requirements, unless i <br /> summer precipitation is above average. ~ Bo <br /> n <br /> 50 <br /> ug <br /> Administrative/Management Concerns ;g 40 <br /> Administration requirements are expected to remain s y 30 <br /> normal for the next two to four weeks. <br /> 20 <br /> Public Use Impacts io ,�' <br /> Adverse impacts on public use will be minimal for the a , <br /> oct N1r Dec Jan Feu Hersh April <br /> next four weeks. MONTH <br /> 0 WET(1984) o DRY(1977) G AVG X 1894 <br /> 8 <br />