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<br />YAMPA, WHITE, NORTH PLATIE AND LARAMIE RIVER BASINS <br />as of May 1, 2001 <br /> <br />Mountain Snowpack* (inches) <br /> <br />P recipitation* (% of average) <br /> <br />__Current --'-Aver~ <br />___Maximum -+-Minim~m I <br />, <br /> <br />I_Monthly G1Year-to-dale I <br /> <br />35 <br /> <br />5 <br /> <br /> <br /> 120 <br /> 100 -- <br />CD <br />'" BO- <br />ca <br />~ <br />CD <br />> <br /><C <br />... 60 -- <br />0 <br />- <br />l: <br />CD <br />l:! <br />CD 40 <br />CL <br /> <br />20 <br /> <br /> <br />30 <br /> <br />25 <br /> <br />.5 <br />.; <br />l: <br />'* 20 <br />> <br />':; <br />C' <br />w 15 <br /> <br />~ <br />CD <br />- <br />ca <br />~ 10 <br /> <br />o <br /> <br />o <br /> <br />Oet Nov Dee Jan Feb Mar Apr May <br /> <br />Jan Feb Mar Apr May Jun <br /> <br />*Based on selected stations <br /> <br />~ <br />1 <br />I <br />I <br /> <br />These basins received appreciable amounts of snow during April, but warm temperatures have <br />triggered the spring snowmelt, and the snowpack measurements are now significantly less than <br />last month. Remaining accumulation in the North Platte Basin is at 74% of average, while the <br />Yampa and White basin's accumulation is down to only 69% of average. The snowpack is highly <br />variable ranging from only 59% of average in the Elk River Watershed, to 89% of average in the <br />White River Watershed. There was 108% of average precipitation in the higher elevations of <br />these basins during March, and the water year total is now 86% of average. The combined <br />reservoir storage in these basins is at 104% of average, which is about 4% more than last year at <br />this time. Most of the streamflow forecasts are nearly the same as last month's forecasts. They are <br />extremely variable depending on location and snowpack conditions, ranging from only 51 % of <br />average Elkhead Creek near Elkhead, to 82% of average on the Yampa River above Stagecoach <br />Reservoir. <br />