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r <br /> . <br /> YAMPA/WHITE BASIN <br /> Basinwide Conditions Assessment: I <br /> The SWSI value of+1.7 indicates that for May the basin YAMPA-WHITE RIVER BASINS <br /> water supplies were above normal. The Soil Conservation Service 5 Surface .tor Supplyl Index Hl story <br /> reports May 31 snowpack at 142% of normal in the Yampa basin 4 <br /> and 340% of normal in the White basin. The National Weather s <br /> 3 J.. . .. <br /> Service reports May precipitation as 108% of normal. Flow at the _— . 4 , <br /> gaging station Yampa River at Steamboat averaged 1,774 cfs as 2 L :i-- <br /> compared to the 1961-1991 May average of 1,600 cfs. The runoff 1 ;::_�. —, . r w <br /> began in late April and gained momentum during May as " 1 -7' 4,. - <br /> temperatures ,increased. However, cooler temperatures associated _ / - -- ,;E: ' , ., , <br /> with thunderstorm activity late in May slowed runoff. Stream µ• `-,7-./•' ; : :�; <br /> flows peaked throughout the basin between May 25 and 28. [�; , fi :- " -'• <br /> ' <br /> Significant snowpack remains at the higher elevations. Area 3- w f <br /> r . <br /> reservoirs are open. JANB4 JANBS JAN86 JAN87 JANBB JANB9 JAN90 JAN91 JAN92 JAN93 <br /> MONTH/YEAS <br /> Outlook: <br /> Weather will continue to influence stream flows for the <br /> next month. The remaining snowpack may produce more high <br /> flows and some flooding if temperatures increase significantly and <br /> above average precipitation continues. There appears to be YAMPA RIVER AT STEAMBOAT <br /> sufficient snowpack to fill reservoirs and maintain stream flows at 600 FLOW BY WATER YEAR <br /> elevated levels for four to six weeks. <br /> 500 <br /> Administrative/Management Concerns: <br /> Administration requirements are expected to remain t 4p° <br /> minimal for the next 30-40 days as the runoff continues. o s 300 • <br /> W? <br /> V <br /> Public Use Impacts: 200 <br /> Impacts on public use are expected to be minimal for the <br /> next 60 days. High stream flows will be enjoyed by kayakers and ,o. <br /> river rafters while fishermen look forward to less turbidity in the <br /> water as stream flows decline. ° <br /> Oct NOV Dec Jan Fob March A0r11 May Juno Ju I Aug Soot <br /> MONTH <br /> 0 WET(19043 p DRY(1977) A AVG X 1993 <br /> 8 <br />