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IN <br /> Best COPY <br /> pvoabie <br /> SAN JUAN/DOLORES BASIN January, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-0.3 indicates thar for December SAN JUAN/DOLORES RIVER BASINS ;R. <br /> to basin water supplies were near normal. The National ''°''Oat.,a'°°'" Index History ` <br /> Resources Conservation Service reports January 1 snowpack 4- ;, <br /> . as 69% of normal. Flow at the gaging station Animas River - _ °' T s <br /> near Durango averaged 251 cfs as compared to the long term fy - <br /> average of 227 cfs. Storage in McPhee,Vallecito, and Lemon 2- a , - } <br /> reservoirs totaled 127%of normal as of the end of December. - - <br /> During December,Durango's temperatures were near D ^�.,��■, . �,1 ; <br /> j ' I v II <br /> normal with an average low of 15°, and a maximum low of- -,- ^j;�" - !;' 0 <br /> 1° on the 20th. Durango precipitation totaled 1.36 inches, 2, 00 <br /> r , <br /> 0.40 inches below normal. For the water year to date, total o ; ;0 c <br /> precipitation has been only 70% of normal. -3" '' <br /> Although snow has fallen in the basin and ski slopes -4 <br /> JAN99 JAN90 JAN91 JINNJAN93 JAN94 JAN95 JAN99 JAN97 JAN99 ti <br /> are open,there has been some disappointment in the amount ION WYEAN - <br /> of snowfall received. The El Nino weather patterns have <br /> failed to send a major storm through the area. The snow ':` <br /> distribution is consistently spread out,with reports of late `., <br /> December and early January storms increasing the amounts in - .. V <br /> the lower elevations and mesa areas. ANIMAS RIVER NR. DURANGO <br /> Soil moisture conditions are fair to good and the 19p FLOW eY WW1 YEAR <br /> ground is frozen in exposed areas. 1 <br /> Rivers are running at about 15% above normal. 150 - . f <br /> 150 <br /> Reservoirs continue holding their storage levels and 1 140 <br /> contained over 30% above average contents in most cases. • <br /> n 10 <br /> ' 110 <br /> 5. 100 <br /> Outlook di °0 - V V <br /> At this time prospects are good for a normal runoff. 70 lj �{ N; - . <br /> is early in the season and much more information will be i °° :_.ram • . <br /> ss <br /> known when the next six weeks of weather has passed. -�— <br /> 20 4 <br /> 10 <br /> Oct Nev Dee Jan Feb March <br /> MONTH <br /> 0 MET C1073) 0 DAY C1977) A AVG X 1991 <br /> N <br /> REPRESENTATIVE RESERVOIRS <br /> DDLDaes-AN 0.8$visits <br /> no <br /> !00 <br /> }S <br /> 25° 'y\\ <br /> ` 00 <br /> 11g 150 <br /> a <br /> 100..../N <br /> so <br /> McPhee, Val faults Laaoh <br /> ® AVp. 12/31 Canton. ® 12/31/97 Contents <br />