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YAMPA/WHITE BASIN <br /> Basinwide Conditions Assessment: i <br /> The SWSI value of -2.9 indicates that for May the YAMPA-WHITE RIVER BASINS <br /> basin water supplies were below normal. The National s Su-face Water Supply Index History <br /> Weather Service reports basin precipitation as 35%of normal 4- <br /> during May. Flow at the gaging station Yampa River at <br /> w 3- <br /> Steamboat averaged 1,423 cfs as compared to the 1961-1993 <br /> May average of 1,600 cfs. 2 <br /> • <br /> The Yampa River peaked on May 17, approximately 1- .� : 7~- <br /> two weeks earlier than normal, because of warmer than l o :7- f ' '"" <br /> z <br /> normal temperatures. By June 1 warm temperatures and high ,-/: <br /> winds had melted the snowpack and river flows began to _ ~' ' = 149 -%` <br /> recede. Many tributaries went under administration, with 0 2 ,.: ' ' M -' r' <br /> w. -r <br /> some producing no flow. Storms during the 16th and 30th -3 _ �` <br /> improved the soil moisture content, but strong winds quickly -4 , <br /> JAMBS JANB9 JAN97 JANBB JAN139 JAN90 JAN91 JAN92 JAN93 JAN91 <br /> reduced the improvement. Reservoirs are storing water in MONTH/YEAR <br /> areas that are not impacted by river calls. <br /> Outlook <br /> Stream flows will continue to drop through the <br /> summer with short term increases during precipitation events. YAMPA RIVER AT STEAMBOAT <br /> Runoff predictions for the Yampa River basin are 75% of 600 FLOW BY WATER YEAR <br /> normal or less. This indicates there will be insufficient runoff <br /> to meet requirements, unless summer precipitation is above S00 <br /> average. <br /> 100 <br /> Administrative/Management Concerns <br /> o n 300 <br /> Administration of the North Platte River basin, Bear W g <br /> River, and many side tributaries within the Yampa basin will " 200 <br /> be required for the remainder of the summer. Some of the 1 <br /> tributaries will be completely without water during the 100 <br /> summer. <br /> 0 <br /> Oct Ebv DOC Jan Fob March Apr1 I May Juno Ju I Aug Sept <br /> Public Use Impacts ,C,.,T" <br /> WETImpacts on public use are expected to be minimal for Q (9981, O DRY ,927) p X 1994 <br /> the next two to three weeks. Rafters and kayakers will enjoy <br /> a very short season of high water. <br /> 8 <br />