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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS as of April 1, 2000 Mountain Snow pack' (inches) r ~currenl -'-Average ___Maximum -+-Minimum 45 I. 40 35 .5 30 .- c ~ 25 .~ ::I ~ 20 .. .. - .. 15 == 10 5 o Jan Feb Mar Apr May Jun *Based on selected stations Precipitation' (% of average) I_Monlhly DYear-lo-d;;!;l 180 .. en .. .. .. > 100- < - 0 - 80 c .. u .. .. 60 lL 40 o. Del Nov Dee Jan Feb Mar Apr May These basins received the largest snow accumulation in the state during March. The total snow accumulation has gone from only 63% of average on March I, to 83% of average on April 1. This increase in snowpack percent of average should relieve some of the water shortage concerns for most of the basins, with the exception of the San Juan Basin in which snowpack accumulation is only 57% of average. Overall, there is 80% more snow in the basin now than last year at this time. The lower elevations and valleys received 167% of average precipitation during March, but the water year total is now only 64% of average. The combined reservoir storage level in these basins is at 113% of average for this time of year, which is 14% more storage than last year at this time. Many of the streamflow forecasts have improved during March and are now near average, but not all forecast points benefited from the additional snow and many still remain well below average. The forecasts range from only 51 % of average flow on the Navajo River at Oso Diversion, to 107% of average on the San Miguel River near Placerville. I) .!